1s5d

Cholera holotoxin with an A-subunit Y30S mutation, Crystal form 2

Method: X-RAY DIFFRACTION D_max: 83.7 Å Quality: EXCELLENT

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1. Protein Identity and Related Structures Protein Identity & Related Structures

Cholera enterotoxin, A chain

Vibrio cholerae

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein heterocomplex Heteromer Protein × 6 PDB declaration: hexameric（6） Consistent with protein copy count	Chain A； UniProt 19–258	Mutation：Y30S	cholera toxin B protein (CTB) × 5 （P01556） NA SODIUM ION × 1 GOL GLYCEROL × 5 GAL beta-D-galactopyranose × 5	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, SITTING DROP；298 K；PEG 3350, sodium citrate, galactose, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 1.75 Å R-free 0.191

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 1S5D	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1S5B Cholera holotoxin with an A-subunit Y30S mutation Form 3 Deposited 2004-01-20	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 19–258（240 aa）	Mutation：Y30S	NA SODIUM ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；298 K；PEG 2000mme, MES, kemptide, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.13 Å R-free 0.224
1S5C Cholera holotoxin with an A-subunit Y30S mutation, Crystal form 1 Deposited 2004-01-20	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 19–258（240 aa）	Mutation：Y30S	NA SODIUM ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；298 K；PEG 2000mme, MES, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.50 Å R-free 0.262
1S5E Cholera holotoxin, Crystal form 1 Deposited 2004-01-20	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 19–258（240 aa）	Not recorded	NA SODIUM ION × 1 GAL beta-D-galactopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；298 K；PEG 3350, magnesium acetate, galactose, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 1.90 Å R-free 0.205
1S5E Cholera holotoxin, Crystal form 1 Deposited 2004-01-20	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain B 19–258（240 aa）	Not recorded	NA SODIUM ION × 1 GAL beta-D-galactopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；298 K；PEG 3350, magnesium acetate, galactose, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 1.90 Å R-free 0.205
1S5F Cholera holotoxin, Crystal form 2 Deposited 2004-01-20	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 19–258（240 aa）	Not recorded	NA SODIUM ION × 1 GAL beta-D-galactopyranose × 5	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；298 K；PEG 3350, lithium citrate, galactose, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.60 Å R-free 0.260
1S5F Cholera holotoxin, Crystal form 2 Deposited 2004-01-20	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 19–258（240 aa）	Not recorded	NA SODIUM ION × 1 GAL beta-D-galactopyranose × 5	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；298 K；PEG 3350, lithium citrate, galactose, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.60 Å R-free 0.260
1XTC CHOLERA TOXIN Deposited 1996-01-10	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 7 PDB declaration: heptameric	Chain A 19–212（194 aa） Chain C 213–258（46 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.40 Å
2A5D Structural basis for the activation of cholera toxin by human ARF6-GTP Deposited 2005-06-30	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 19–210（192 aa） Fragment：A1 subunit	Mutation：E110D, E112D, C187S	MG MAGNESIUM ION × 1 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 NA SODIUM ION × 1 GOL GLYCEROL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；298 K；PEG2000mme, cacodylate, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 1.80 Å R-free 0.199
2A5F Cholera toxin A1 subunit bound to its substrate, NAD+, and its human protein activator, ARF6 Deposited 2005-06-30	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 19–210（192 aa） Fragment：Cholera toxin A1 subunit	Mutation：E110D, E112D, C187S	MG MAGNESIUM ION × 1 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 NA SODIUM ION × 1 NAD NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 1 GOL GLYCEROL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；298 K；PEG2000mme, cacodylate, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.02 Å R-free 0.231
2A5G Cholera toxin A1 subunit bound to ARF6(Q67L) Deposited 2005-06-30	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 19–210（192 aa） Fragment：Cholera toxin A1 subunit	Mutation：E110D, E112D, C187S	MG MAGNESIUM ION × 1 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 NA SODIUM ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；293 K；PEG 2000mme, cacodylate, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.66 Å R-free 0.265
8OXS Cholera holotoxin variant (chimera with E. coli heat-labile enterotoxin, 4 C-terminal substitutions) Deposited 2023-05-02	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 19–258（240 aa）	Mutation：D229E, I230V, T232I, H233Y	NA SODIUM ION × 1 GAL beta-D-galactopyranose × 6 GLA alpha-D-galactopyranose × 4 EPE 4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；293.15 K；Crystallization mix: 20% w/v PEG 6K 0.1 M HEPES pH 7.0 0.2 M NH4Cl Protein storage buffer: 0.05 M Tris/HCl pH 7.5 0.2 M NaCl 0.05 M D-(+)-galactose	Resolution 1.60 Å R-free 0.224
8OXS Cholera holotoxin variant (chimera with E. coli heat-labile enterotoxin, 4 C-terminal substitutions) Deposited 2023-05-02	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain B 19–258（240 aa）	Mutation：D229E, I230V, T232I, H233Y	NA SODIUM ION × 1 GAL beta-D-galactopyranose × 4 GLA alpha-D-galactopyranose × 3 EPE 4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；293.15 K；Crystallization mix: 20% w/v PEG 6K 0.1 M HEPES pH 7.0 0.2 M NH4Cl Protein storage buffer: 0.05 M Tris/HCl pH 7.5 0.2 M NaCl 0.05 M D-(+)-galactose	Resolution 1.60 Å R-free 0.224
8Q6I Cholera holotoxin variant (chimera with E. coli heat-labile enterotoxin, 1 C-terminal substitution) Deposited 2023-08-11	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 19–258（240 aa）	Mutation：D229E Non-standard monomer：Yes (specific site not provided by mmCIF)	NA SODIUM ION × 2 GOL GLYCEROL × 11 PEG DI(HYDROXYETHYL)ETHER × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8；293.15 K；Crystallization mix: 20% PEG6000 0.2 M lithium chloride 0.1 M Tris pH 8.0 Protein storage buffer: 0.05 M Tris/HCl pH 7.5 0.2 M NaCl	Resolution 1.60 Å R-free 0.222
8QRE Cholera holotoxin (wildtype) Deposited 2023-10-06	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 19–258（240 aa）	Not recorded	NA SODIUM ION × 2 GAL beta-D-galactopyranose × 6 GOL GLYCEROL × 7 ACT ACETATE ION × 2 PEG DI(HYDROXYETHYL)ETHER × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.4；293.15 K；Crystallization mix: 0.125 M Magnesium acetate 24% PEG 3350 300 mM galactose (in protein storage buffer) Protein storage buffer: 50 mM Tris pH 7.4 200 mM NaCl 1 mM EDTA 3 mM sodium azide	Resolution 2.30 Å R-free 0.263
8QRE Cholera holotoxin (wildtype) Deposited 2023-10-06	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain B 19–258（240 aa）	Not recorded	NA SODIUM ION × 2 GAL beta-D-galactopyranose × 4 GOL GLYCEROL × 7 ACT ACETATE ION × 1 GLA alpha-D-galactopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.4；293.15 K；Crystallization mix: 0.125 M Magnesium acetate 24% PEG 3350 300 mM galactose (in protein storage buffer) Protein storage buffer: 50 mM Tris pH 7.4 200 mM NaCl 1 mM EDTA 3 mM sodium azide	Resolution 2.30 Å R-free 0.263

11 other PDB entries and 15 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	CHTA_VIBCH
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–240； UniProt 19–258

cholera toxin B protein (CTB)

Vibrio cholerae

UniProt P01556

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein heterocomplex Heteromer Protein × 6 PDB declaration: hexameric（6） Consistent with protein copy count	Chain D； UniProt 22–124 Chain E； UniProt 22–124 Chain F； UniProt 22–124 Chain G； UniProt 22–124 Chain H； UniProt 22–124	Not recorded	Cholera enterotoxin, A chain × 1 （P01555） NA SODIUM ION × 1 GOL GLYCEROL × 5 GAL beta-D-galactopyranose × 5	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, SITTING DROP；298 K；PEG 3350, sodium citrate, galactose, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 1.75 Å R-free 0.191

Other States of the Same Protein in the Database

Other PDB	Difference from Current Entry 1S5D	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1CHP SURPRISING LEADS FOR A CHOLERA TOXIN RECEPTOR BINDING ANTAGONIST; CRYSTALLOGRAPHIC STUDIES OF CTB MUTANTS Deposited 1995-02-15	Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 5 PDB declaration: pentameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Mutation：G33D Mutation：G33D Mutation：G33D Mutation：G33D Mutation：G33D	CL CHLORIDE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.5；pH 7.5	Resolution 2.00 Å
1CHQ SURPRISING LEADS FOR A CHOLERA TOXIN RECEPTOR BINDING ANTAGONIST; CRYSTALLOGRAPHIC STUDIES OF CTB MUTANTS Deposited 1995-02-15	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 5 PDB declaration: pentameric	Chain D 29–131（103 aa） Chain E 29–131（103 aa） Chain F 29–131（103 aa） Chain G 29–131（103 aa） Chain H 29–131（103 aa）	Mutation：R35D Mutation：R35D Mutation：R35D Mutation：R35D Mutation：R35D	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 6.4；pH 6.4	Resolution 2.10 Å
1CT1 CHOLERA TOXIN B-PENTAMER MUTANT G33R BOUND TO RECEPTOR PENTASACCHARIDE Deposited 1997-06-03	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 5 PDB declaration: pentameric	Chain D 22–124（103 aa） Fragment：B-PENTAMER Chain E 22–124（103 aa） Fragment：B-PENTAMER Chain F 22–124（103 aa） Fragment：B-PENTAMER Chain G 22–124（103 aa） Fragment：B-PENTAMER Chain H 22–124（103 aa） Fragment：B-PENTAMER	Mutation：G33R Mutation：G33R Mutation：G33R Mutation：G33R Mutation：G33R	CL CHLORIDE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions PROTEIN, 20 MM TRIS, 1 MM GM1-OS, PH 7.5 200 MM MGCL2, 100 MM CACODYLATE, 19% PEG 1000, 0.2% AGAROSE, PH 7.2	Resolution 2.30 Å R-free 0.250
1FGB TOXIN Deposited 1996-02-21	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 5 PDB declaration: pentameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.40 Å
1G8Z HIS57ALA MUTANT OF CHOLERA TOXIN B-PENATMER Deposited 2000-11-21	Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 5 PDB declaration: pentameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Mutation：H57A Mutation：H57A Mutation：H57A Mutation：H57A Mutation：H57A	GAL beta-D-galactopyranose × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.4；298 K；PEG 5000, NaCl, Tris HCl, galactose, pH 8.4, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.00 Å R-free 0.239
1JR0 CHOLERA TOXIN B-PENTAMER WITH LIGAND BMSC-0011 Deposited 2001-08-09	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 5 PDB declaration: pentameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	A24 (3-NITRO-5-(2-MORPHOLIN-4-YL-ETHYLAMINOCARBONYL)PHENYL)-GALACTOPYRANOSIDE × 5	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；PEG 3000, NaCl, MgCl2, Tris HCl, pH 7.5, VAPOR DIFFUSION, SITTING DROP	Resolution 1.30 Å R-free 0.183
1JR0 CHOLERA TOXIN B-PENTAMER WITH LIGAND BMSC-0011 Deposited 2001-08-09	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 10 PDB declaration: decameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	A24 (3-NITRO-5-(2-MORPHOLIN-4-YL-ETHYLAMINOCARBONYL)PHENYL)-GALACTOPYRANOSIDE × 10	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；PEG 3000, NaCl, MgCl2, Tris HCl, pH 7.5, VAPOR DIFFUSION, SITTING DROP	Resolution 1.30 Å R-free 0.183
1RCV Cholera Toxin B-Pentamer Complexed With Bivalent Nitrophenol-Galactoside Ligand BV1 Deposited 2003-11-04	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 5 PDB declaration: pentameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	BV1 [3-(4-{3-[3-NITRO-5-(GALACTOPYRANOSYLOXY)-BENZOYLAMINO]-PROPYL}-PIPERAZIN-1-YL)-PROPYLAMINO] -2-(3-{4-[3-(3-NITRO-5-[GALACTOPYRANOSYLOXY]-BENZOYLAMINO)-PROPYL]-PIPERAZIN-1-YL} -PROPYL-AMINO)-3,4-DIOXO-CYCLOBUTENE × 5	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；298 K；30% PEG 300, 50 mM NaCl, 100 mM Tris-HCl, and 2.3mM BV1, pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 298.0K	Resolution 1.60 Å R-free 0.193
1RD9 Cholera Toxin B-Pentamer Complexed With Bivalent Nitrophenol-Galactoside Ligand BV2 Deposited 2003-11-05	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 5 PDB declaration: pentameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	BV2 1,3-BIS-([3-(4-{3-[3-NITRO-5-(GALACTOPYRANOSYLOXY)-BENZOYLAMINO]-PROPYL}-PIPERAZIN-1-YL)-PROPYL-AMINO]-CARBONYLOXY)-2-AMINO-PROPANE × 5 TRS 2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL × 1 P6G HEXAETHYLENE GLYCOL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；298 K；38% PEG 300, 50 mM NaCl, 100 mM Tris-HCl, and 2.3mM BV2, pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 1.44 Å R-free 0.184
1RDP Cholera Toxin B-Pentamer Complexed With Bivalent Nitrophenol-Galactoside Ligand BV3 Deposited 2003-11-05	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 5 PDB declaration: pentameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	BV3 1,3-BIS-([[3-(4-{3-[3-NITRO-5-(GALACTOPYRANOSYLOXY)-BENZOYLAMINO]-PROPYL}-PIPERAZIN-1-YL)-PROPYLAMINO-3,4-DIOXO-CYCLOBU TENYL]-AMINO-ETHYL]-AMINO-CARBONYLOXY)-2-AMINO-PROPANE × 5 TRS 2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL × 1 PGE TRIETHYLENE GLYCOL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；298 K；12% PEG 8000, 50 mM NaCl, 100 mM Tris-HCl, 20mM MgCl2, and 2.3mM BV3, pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 298.0K	Resolution 1.35 Å R-free 0.171
1RF2 Cholera Toxin B-Pentamer Complexed With Bivalent Nitrophenol-Galactoside Ligand BV4 Deposited 2003-11-07	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 5 PDB declaration: pentameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	BV4 1,3-BIS-([3-[3-[3-(4-{3-[3-NITRO-5-(GALACTOPYRANOSYLOXY)-BENZOYLAMINO]-PROPYL}-PIPERAZIN-1-YL)-PROPYLAMINO-3,4-DIOXO-CYCLOBUTENYL]-AMINO-PROPOXY-ETHOXY-ETHOXY]-PROPYL-]AMINO-CARBONYLOXY)-2-AMINO-PROPANE × 5 TRS 2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL × 1 PGE TRIETHYLENE GLYCOL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；298 K；16% PEG 8000, 50 mM NaCl, 100 mM Tris-HCl, 20mM MgCl2, and 2.3mM BV4, pH 7.5, VAPOR DIFFUSION, SITTING DROP, temperature 298.0K	Resolution 1.35 Å R-free 0.174
1S5B Cholera holotoxin with an A-subunit Y30S mutation Form 3 Deposited 2004-01-20	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	NA SODIUM ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；298 K；PEG 2000mme, MES, kemptide, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.13 Å R-free 0.224
1S5C Cholera holotoxin with an A-subunit Y30S mutation, Crystal form 1 Deposited 2004-01-20	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	NA SODIUM ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；298 K；PEG 2000mme, MES, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.50 Å R-free 0.262
1S5E Cholera holotoxin, Crystal form 1 Deposited 2004-01-20	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	NA SODIUM ION × 1 GAL beta-D-galactopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；298 K；PEG 3350, magnesium acetate, galactose, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 1.90 Å R-free 0.205
1S5E Cholera holotoxin, Crystal form 1 Deposited 2004-01-20	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain J 22–124（103 aa） Chain K 22–124（103 aa） Chain L 22–124（103 aa） Chain M 22–124（103 aa） Chain N 22–124（103 aa）	Not recorded	NA SODIUM ION × 1 GAL beta-D-galactopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；298 K；PEG 3350, magnesium acetate, galactose, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 1.90 Å R-free 0.205
1S5F Cholera holotoxin, Crystal form 2 Deposited 2004-01-20	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	NA SODIUM ION × 1 GAL beta-D-galactopyranose × 5	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；298 K；PEG 3350, lithium citrate, galactose, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.60 Å R-free 0.260
1S5F Cholera holotoxin, Crystal form 2 Deposited 2004-01-20	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	NA SODIUM ION × 1 GAL beta-D-galactopyranose × 5	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；298 K；PEG 3350, lithium citrate, galactose, VAPOR DIFFUSION, SITTING DROP, temperature 298K	Resolution 2.60 Å R-free 0.260
1XTC CHOLERA TOXIN Deposited 1996-01-10	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 7 PDB declaration: heptameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.40 Å
2CHB CHOLERA TOXIN B-PENTAMER COMPLEXED WITH GM1 PENTASACCHARIDE Deposited 1997-06-03	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 5 PDB declaration: pentameric	Chain D 22–124（103 aa） Fragment：B-PENTAMER Chain E 22–124（103 aa） Fragment：B-PENTAMER Chain F 22–124（103 aa） Fragment：B-PENTAMER Chain G 22–124（103 aa） Fragment：B-PENTAMER Chain H 22–124（103 aa） Fragment：B-PENTAMER	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.5；200 MM MGCL2 100 MM CACODYLATE 5% PEG 1000 PH 7.5	Resolution 2.00 Å
3CHB CHOLERA TOXIN B-PENTAMER COMPLEXED WITH GM1 PENTASACCHARIDE Deposited 1998-03-24	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 5 PDB declaration: pentameric	Chain D 1–124（124 aa） Fragment：B-PENTAMER Chain E 1–124（124 aa） Fragment：B-PENTAMER Chain F 1–124（124 aa） Fragment：B-PENTAMER Chain G 1–124（124 aa） Fragment：B-PENTAMER Chain H 1–124（124 aa） Fragment：B-PENTAMER	Mutation：H94R Mutation：H94R Mutation：H94R Mutation：H94R Mutation：H94R	UNX UNKNOWN LIGAND × 5 MES 2-(N-MORPHOLINO)-ETHANESULFONIC ACID × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；SITTING DROP, pH 7.0, vapor diffusion - sitting drop	Resolution 1.25 Å R-free 0.180
5ELC Cholera toxin El Tor B-pentamer in complex with Lewis-y Deposited 2015-11-04	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 5 PDB declaration: pentameric	Chain A 22–124（103 aa） Chain B 22–124（103 aa） Chain C 22–124（103 aa） Chain D 22–124（103 aa） Chain E 22–124（103 aa）	Not recorded	CA CALCIUM ION × 10 BCN BICINE × 10	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；293 K；0.1 M Bicine-Tris, 12.5% PEG1000, 12.5% PEG3350, 12.5% MPD, 0.03 M calcium chloride, 0.03 M magnesium chloride	Resolution 1.50 Å R-free 0.260
5ELC Cholera toxin El Tor B-pentamer in complex with Lewis-y Deposited 2015-11-04	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Other combination Homooligomer；Protein × 5 PDB declaration: pentameric	Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa） Chain I 22–124（103 aa） Chain J 22–124（103 aa）	Not recorded	FUC alpha-L-fucopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；293 K；0.1 M Bicine-Tris, 12.5% PEG1000, 12.5% PEG3350, 12.5% MPD, 0.03 M calcium chloride, 0.03 M magnesium chloride	Resolution 1.50 Å R-free 0.260
5ELE Cholera toxin El Tor B-pentamer in complex with A Lewis-y Deposited 2015-11-04	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 5 PDB declaration: pentameric	Chain A 22–124（103 aa） Chain B 22–124（103 aa） Chain C 22–124（103 aa） Chain D 22–124（103 aa） Chain E 22–124（103 aa）	Not recorded	CA CALCIUM ION × 10 FUC alpha-L-fucopyranose × 1 BCN BICINE × 10	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；293 K；0.1 M Bicine-Tris, 9% PEG1000, 9% PEG3350, 9% MPD, 0.03 M calcium chloride, 0.03 M magnesium chloride	Resolution 1.60 Å R-free 0.226
5ELE Cholera toxin El Tor B-pentamer in complex with A Lewis-y Deposited 2015-11-04	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Other combination Homooligomer；Protein × 5 PDB declaration: pentameric	Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa） Chain I 22–124（103 aa） Chain J 22–124（103 aa）	Not recorded	FUC alpha-L-fucopyranose × 3 1PE PENTAETHYLENE GLYCOL × 1 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；293 K；0.1 M Bicine-Tris, 9% PEG1000, 9% PEG3350, 9% MPD, 0.03 M calcium chloride, 0.03 M magnesium chloride	Resolution 1.60 Å R-free 0.226
5ELF Cholera toxin El Tor B-pentamer in complex with A-pentasaccharide Deposited 2015-11-04	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 5 PDB declaration: pentameric	Chain A 22–124（103 aa） Chain B 22–124（103 aa） Chain C 22–124（103 aa） Chain D 22–124（103 aa） Chain E 22–124（103 aa）	Not recorded	CA CALCIUM ION × 10 BCN BICINE × 10 FUC alpha-L-fucopyranose × 1 GLC alpha-D-glucopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8.5；293 K；0.1 M Bicine-Tris, 9% PEG1000, 9% PEG3350, 9% MPD, 0.03 M calcium chloride, 0.03 M magnesium chloride. Microseeding.	Resolution 1.55 Å R-free 0.220
5ELF Cholera toxin El Tor B-pentamer in complex with A-pentasaccharide Deposited 2015-11-04	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Other combination Homooligomer；Protein × 5 PDB declaration: pentameric	Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa） Chain I 22–124（103 aa） Chain J 22–124（103 aa）	Not recorded	FUC alpha-L-fucopyranose × 1 GLC alpha-D-glucopyranose × 1 PG4 TETRAETHYLENE GLYCOL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8.5；293 K；0.1 M Bicine-Tris, 9% PEG1000, 9% PEG3350, 9% MPD, 0.03 M calcium chloride, 0.03 M magnesium chloride. Microseeding.	Resolution 1.55 Å R-free 0.220
5LZG Cholera toxin El Tor B-pentamer in complex with inhibitor PC262 Deposited 2016-09-29	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 5 PDB declaration: pentameric	Chain A 22–124（103 aa） Chain B 22–124（103 aa） Chain C 22–124（103 aa） Chain D 22–124（103 aa） Chain E 22–124（103 aa）	Not recorded	7BN (2~{R},4~{S},5~{R},6~{R})-5-acetamido-2-[4-[3-[2-[(2~{S},3~{R},4~{R},5~{R},6~{R})-6-(hydroxymethyl)-3,4,5-tris(oxidanyl)oxan-2-yl]ethylamino]-3-oxidanylidene-propyl]-1,2,3-triazol-1-yl]-4-oxidanyl-6-[(1~{R},2~{R})-1,2,3-tris(oxidanyl)propyl]oxane-2-carboxylic acid × 5 TRS 2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL × 1 IMD IMIDAZOLE × 2 PEG DI(HYDROXYETHYL)ETHER × 1 MRD (4R)-2-METHYLPENTANE-2,4-DIOL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；0.1 M MES/Imidazole buffer, pH 6.5, 10% PEG 1000, 10 % PEG 3350, 10 % MPD, 0.03 M divalent cations	Resolution 1.13 Å R-free 0.198
5LZJ Cholera toxin El Tor B-pentamer in complex with inhibitor Laura237 Deposited 2016-09-29	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 5 PDB declaration: pentameric	Chain A 22–124（103 aa） Chain B 22–124（103 aa） Chain C 22–124（103 aa） Chain D 22–124（103 aa） Chain E 22–124（103 aa）	Not recorded	SO4 SULFATE ION × 1 PEG DI(HYDROXYETHYL)ETHER × 2 PGE TRIETHYLENE GLYCOL × 2 7BT (~{Z})-~{N}-[2-[(2~{R},3~{R},4~{R},5~{R},6~{R})-6-(hydroxymethyl)-3,4,5-tris(oxidanyl)oxan-2-yl]ethyl]-3-(3,4,5-trimethoxyphenyl)prop-2-enamide × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；0.1M MES pH 6, 30% PEG 400, 3% PGA-LM	Resolution 1.20 Å R-free 0.228
8OXS Cholera holotoxin variant (chimera with E. coli heat-labile enterotoxin, 4 C-terminal substitutions) Deposited 2023-05-02	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	NA SODIUM ION × 1 GAL beta-D-galactopyranose × 6 GLA alpha-D-galactopyranose × 4 EPE 4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；293.15 K；Crystallization mix: 20% w/v PEG 6K 0.1 M HEPES pH 7.0 0.2 M NH4Cl Protein storage buffer: 0.05 M Tris/HCl pH 7.5 0.2 M NaCl 0.05 M D-(+)-galactose	Resolution 1.60 Å R-free 0.224
8OXS Cholera holotoxin variant (chimera with E. coli heat-labile enterotoxin, 4 C-terminal substitutions) Deposited 2023-05-02	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain C 22–124（103 aa） Chain I 22–124（103 aa） Chain J 22–124（103 aa） Chain K 22–124（103 aa） Chain L 22–124（103 aa）	Not recorded	NA SODIUM ION × 1 GAL beta-D-galactopyranose × 4 GLA alpha-D-galactopyranose × 3 EPE 4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；293.15 K；Crystallization mix: 20% w/v PEG 6K 0.1 M HEPES pH 7.0 0.2 M NH4Cl Protein storage buffer: 0.05 M Tris/HCl pH 7.5 0.2 M NaCl 0.05 M D-(+)-galactose	Resolution 1.60 Å R-free 0.224
8Q6I Cholera holotoxin variant (chimera with E. coli heat-labile enterotoxin, 1 C-terminal substitution) Deposited 2023-08-11	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	NA SODIUM ION × 2 GOL GLYCEROL × 11 PEG DI(HYDROXYETHYL)ETHER × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8；293.15 K；Crystallization mix: 20% PEG6000 0.2 M lithium chloride 0.1 M Tris pH 8.0 Protein storage buffer: 0.05 M Tris/HCl pH 7.5 0.2 M NaCl	Resolution 1.60 Å R-free 0.222
8QRE Cholera holotoxin (wildtype) Deposited 2023-10-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	NA SODIUM ION × 2 GAL beta-D-galactopyranose × 6 GOL GLYCEROL × 7 ACT ACETATE ION × 2 PEG DI(HYDROXYETHYL)ETHER × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.4；293.15 K；Crystallization mix: 0.125 M Magnesium acetate 24% PEG 3350 300 mM galactose (in protein storage buffer) Protein storage buffer: 50 mM Tris pH 7.4 200 mM NaCl 1 mM EDTA 3 mM sodium azide	Resolution 2.30 Å R-free 0.263
8QRE Cholera holotoxin (wildtype) Deposited 2023-10-06	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain C 22–124（103 aa） Chain I 22–124（103 aa） Chain J 22–124（103 aa） Chain K 22–124（103 aa） Chain L 22–124（103 aa）	Not recorded	NA SODIUM ION × 2 GAL beta-D-galactopyranose × 4 GOL GLYCEROL × 7 ACT ACETATE ION × 1 GLA alpha-D-galactopyranose × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.4；293.15 K；Crystallization mix: 0.125 M Magnesium acetate 24% PEG 3350 300 mM galactose (in protein storage buffer) Protein storage buffer: 50 mM Tris pH 7.4 200 mM NaCl 1 mM EDTA 3 mM sodium azide	Resolution 2.30 Å R-free 0.263
9EWF Cholera toxin B subunit in complex with fluorinated GM1 Deposited 2024-04-03	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Homooligomer；Protein × 5 PDB declaration: pentameric	Chain A 22–124（103 aa） Chain B 22–124（103 aa） Chain C 22–124（103 aa） Chain I 22–124（103 aa） Chain J 22–124（103 aa）	Not recorded	A1H7V (2R,3S,4S,5R,6R)-6-dodecoxy-5-fluoranyl-2-(hydroxymethyl)oxane-3,4-diol × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；0.1M MES/Imidazole pH 7.5, 0.03M MgCl2, 0.03M CaCl2, 16% PEG1000, 12% PEG3350 and 10% MPD	Resolution 2.10 Å R-free 0.221
9EWF Cholera toxin B subunit in complex with fluorinated GM1 Deposited 2024-04-03	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Other combination Homooligomer；Protein × 5 PDB declaration: pentameric	Chain D 22–124（103 aa） Chain E 22–124（103 aa） Chain F 22–124（103 aa） Chain G 22–124（103 aa） Chain H 22–124（103 aa）	Not recorded	A1H7V (2R,3S,4S,5R,6R)-6-dodecoxy-5-fluoranyl-2-(hydroxymethyl)oxane-3,4-diol × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；0.1M MES/Imidazole pH 7.5, 0.03M MgCl2, 0.03M CaCl2, 16% PEG1000, 12% PEG3350 and 10% MPD	Resolution 2.10 Å R-free 0.221

26 other PDB entries and 35 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	CHTB_VIBCH
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain D； PDBConstruct 1–103； UniProt 22–124 Author chain E； PDBConstruct 1–103； UniProt 22–124 Author chain F； PDBConstruct 1–103； UniProt 22–124 Author chain G； PDBConstruct 1–103； UniProt 22–124 Author chain H； PDBConstruct 1–103； UniProt 22–124

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

Download Download SAXS (.dat) P(r) (.pr.out) CIF

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	1s5d
Deposition date deposition_date	2004-01-20
Structure title title	Cholera holotoxin with an A-subunit Y30S mutation, Crystal form 2
Keywords keywords	cholera toxin, heat-labile enterotoxin, ADP ribose transferases, AB5 toxins, TRANSFERASE, TOXIN; TRANSFERASE,TOXIN
Experimental Method method	X-RAY DIFFRACTION

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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier	27.83 Å
Radius of gyration Rg (electron density) rg_electron	26.53 Å
Forward intensity I(0) i0	112628000.00
Molecular weight molecular_weight	82196.0 kDa
Excluded volume excluded_volume	102240 Å³
Envelope volume envelope_volume	120050 Å³
Hydration-shell volume shell_volume	36923 Å³
Envelope diameter envelope_diameter	87.5 Å
Shell Rg shell_rg	34.47 Å
Envelope Rg envelope_rg	26.47 Å
Shape Rg shape_rg	26.57 Å
Total Rg total_rg	27.17 Å
Total atoms total_atoms	5779
Residues n_residues	732
Spherical-harmonic order n_harmonics	20
q range q_range	— – 0.5000 Å⁻¹
Data points n_points	101
Shell type shell_type	directional
Solvent electron density solvent_density	0.3340 e/Å³
Shell contrast contrast_shell	0.0300 e/Å³
CRYSOL version crysol_version	4.1.3

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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax	83.7 Å
Rg (real space) rg_real	27.64 Å
Rg uncertainty (real space) rg_real_error	0.41 Å
I(0) (real space) i0_real	1.1260e+08
I(0) uncertainty (real space) i0_real_error	1.5090e+06
Rg (reciprocal space) rg_reciprocal	27.70 Å
I(0) (reciprocal space) i0_reciprocal	112600000.0000
Solution quality estimate total_estimate	0.9100
Solution quality rating solution_quality	EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks	2
Primary peak position r_peak_primary	36.7 Å
Skewness Skewness skewness	0.112
Kurtosis Kurtosis kurtosis	-0.567
Angular range angular_range	— – 0.2850 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	43150000.0000
Real-space data points n_real_points	58
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.959; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.989; Smooth: 0.958

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (6)

Entity 1 Entity 1 polymer

Description description	Cholera enterotoxin, A chain
Molecular weight formula_weight	27152.9 kDa
EC 编号 ec_number	2.4.2.36
Mutation mutation	Y30S
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	6392

NDDKLYRADSRPPDEIKQSGGLMPRGQSESFDRGTQMNINLYDHARGTQTGFVRHDDGYVSTSISLRSAHLVGQTILSGHSTYYIYVIATAPNMFNVNDVLGAYSPHPDEQEVSALGGIPYSQIYGWYRVHFGVLDEQLHRNRGYRDRYYSNLDIAPAADGYGLAGFPPEHRAWREEPWIHHAPPGCGNAPRSSMSNTCDEKTQSLGVKFLDEYQSKVKRQIFSGYQSDIDTHNRIKDEL

来源 Source

来源生物 organism	Vibrio cholerae
NCBI Class编号 ncbi_taxonomy_id	666
宿主生物 host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 polymer

Description description	cholera toxin B protein (CTB)
Molecular weight formula_weight	11623.3 kDa
Source method src_method	man
Copy count entity_count	5

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D,E,F,G,H

TPQNITDLCAEYHNTQIHTLNDKIFSYTESLAGKREMAIITFKNGATFQVEVPGSQHIDSQKKAIERMKDTLRIAYLTEAKVEKLCVWNNKTPHAIAAISMAN

来源 Source

来源生物 organism	Vibrio cholerae
NCBI Class编号 ncbi_taxonomy_id	666
宿主生物 host_organism	Escherichia coli BL21(DE3)

Entity 3 Entity 3 non-polymer

Description description	SODIUM ION
Molecular weight formula_weight	23.0 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	5

Entity 5 Entity 5 non-polymer

Description description	beta-D-galactopyranose
Molecular weight formula_weight	180.2 kDa
Source method src_method	man
Copy count entity_count	5

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	603

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7. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

Domain ID domain_id	d1s5da_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.166 — ADP-ribosylation
Superfamily Superfamily superfamily	d.166.1 — ADP-ribosylation
Family Family family	d.166.1.1 — ADP-ribosylating toxins

Domain ID domain_id	d1s5dd_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.2 — Bacterial enterotoxins
Family Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

Domain ID domain_id	d1s5de_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.2 — Bacterial enterotoxins
Family Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

Domain ID domain_id	d1s5df_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.2 — Bacterial enterotoxins
Family Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

Domain ID domain_id	d1s5dg_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.2 — Bacterial enterotoxins
Family Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

Domain ID domain_id	d1s5dh_
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.2 — Bacterial enterotoxins
Family Family family	b.40.2.1 — Bacterial AB5 toxins, B-subunits

CATH v4.4 (6 domains)

Domain ID domain_id	1s5dA00
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	210 — Heat-Labile Enterotoxin; Chain A
Homologous superfamily homologous superfamily	10 — Heat-Labile Enterotoxin, subunit A

Domain ID domain_id	1s5dD00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1s5dE00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1s5dF00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1s5dG00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	110 —

Domain ID domain_id	1s5dH00
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	110 —

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8. Citations (1)

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Unit-cell length a length_a	60.055 Å
Unit-cell length b length_b	111.904 Å
Unit-cell length c length_c	124.656 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	20

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	1.750 Å
Low-resolution limit resolution_low	30.710 Å
R factor r_factor	0.1628
R_work r_work	0.1613
R_free r_free	0.1915

fit	/app/data/saxs_computation/s5/1s5d/1s5d.fit
pddf	/app/data/pr_computation/s5/1s5d/1s5d.pr.out
profile	/app/data/saxs_computation/s5/1s5d/1s5d.dat

Cholera holotoxin with an A-subunit Y30S mutation, Crystal form 2

1. Protein Identity and Related Structures Protein Identity & Related Structures

Cholera enterotoxin, A chain

State in the Current Structure

Other States of the Same Protein in the Database

cholera toxin B protein (CTB)

State in the Current Structure

Other States of the Same Protein in the Database

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

2. Structure Basics 2. Structure Basics

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

5. Crystallography and Experiment 5. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

6. Entities and Polymers Entities & Polymers (6)

Entity 1 Entity 1 polymer

Polymer Polymer

来源 Source

Entity 2 Entity 2 polymer

Polymer Polymer

来源 Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

7. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (6 domains)

CATH v4.4 (6 domains)

8. Citations (1)

9. Files and Curves (10)

Files (7)

Curves (3)