SAXSdb — 1q1e

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

Maltose/maltodextrin transport ATP-binding protein malK

Escherichia coli

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 homooligomer Homooligomer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain A； UniProt 1–371 Chain B； UniProt 1–371	Not recorded	No other associated polymer	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 6.5；293 K；PEG5K MME, (NH4)2SO4, MES, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 2.90 Å R-free 0.276

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 1Q1E	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1Q12 Crystal Structure of the ATP-bound E. coli MalK Deposited 2003-07-18	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–371（371 aa） Chain B 1–371（371 aa）	Not recorded	ATP ADENOSINE-5'-TRIPHOSPHATE × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.8；273 K；PEG 4000, glycerol, Sodium Acetate, Tris, pH 8.8, VAPOR DIFFUSION, HANGING DROP, temperature 273K	Resolution 2.60 Å R-free 0.286
1Q12 Crystal Structure of the ATP-bound E. coli MalK Deposited 2003-07-18	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–371（371 aa） Chain D 1–371（371 aa）	Not recorded	ATP ADENOSINE-5'-TRIPHOSPHATE × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.8；273 K；PEG 4000, glycerol, Sodium Acetate, Tris, pH 8.8, VAPOR DIFFUSION, HANGING DROP, temperature 273K	Resolution 2.60 Å R-free 0.286
1Q1B Crystal structure of E. coli MalK in the nucleotide-free form Deposited 2003-07-18	Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–371（371 aa） Chain B 1–371（371 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.8；293 K；PEG 4000, glycerol, Sodium Acetate, Tris, pH 8.8, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 2.80 Å R-free 0.304
1Q1B Crystal structure of E. coli MalK in the nucleotide-free form Deposited 2003-07-18	Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–371（371 aa） Chain D 1–371（371 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.8；293 K；PEG 4000, glycerol, Sodium Acetate, Tris, pH 8.8, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 2.80 Å R-free 0.304
2AWN Crystal structure of the ADP-Mg-bound E. Coli MALK (Crystallized with ATP-Mg) Deposited 2005-09-01	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–371（371 aa） Chain B 1–371（371 aa）	Not recorded	MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；5mM ATP-Mg2+, 0.2M Magnesium Formate, 15%~20% PEG3350, 15% Glycerol , VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 2.30 Å R-free 0.271
2AWN Crystal structure of the ADP-Mg-bound E. Coli MALK (Crystallized with ATP-Mg) Deposited 2005-09-01	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–371（371 aa） Chain D 1–371（371 aa）	Not recorded	MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；5mM ATP-Mg2+, 0.2M Magnesium Formate, 15%~20% PEG3350, 15% Glycerol , VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 2.30 Å R-free 0.271
2AWO Crystal structure of the ADP-Mg-bound E. Coli MALK (Crystallized with ADP-Mg) Deposited 2005-09-01	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–371（371 aa） Chain B 1–371（371 aa）	Not recorded	MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；5mM ADP-Mg2+, 0.2M Magnesium Formate, 15%~20% PEG3350, 15% Glycerol, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 2.80 Å R-free 0.277
2AWO Crystal structure of the ADP-Mg-bound E. Coli MALK (Crystallized with ADP-Mg) Deposited 2005-09-01	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain C 1–371（371 aa） Chain D 1–371（371 aa）	Not recorded	MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；293 K；5mM ADP-Mg2+, 0.2M Magnesium Formate, 15%~20% PEG3350, 15% Glycerol, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 2.80 Å R-free 0.277
3FH6 Crystal structure of the resting state maltose transporter from E. coli Deposited 2008-12-08	Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 1–371（371 aa） Chain B 1–371（371 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；293 K；11.5 % PEG 4000, 0.1M ADA pH 6.5, 0.1 M NaCl, 0.1 M Li2SO4, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 4.50 Å R-free 0.363
3FH6 Crystal structure of the resting state maltose transporter from E. coli Deposited 2008-12-08	Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain C 1–371（371 aa） Chain D 1–371（371 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；293 K；11.5 % PEG 4000, 0.1M ADA pH 6.5, 0.1 M NaCl, 0.1 M Li2SO4, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 4.50 Å R-free 0.363
3GD7 Crystal structure of human NBD2 complexed with N6-Phenylethyl-ATP (P-ATP) Deposited 2009-02-23	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain D 219–371（153 aa）	Mutation：Q1280E, Y1307N, E1308A, Q1309A, W1310H, H1402A, Q1411D	B44 N-(2-phenylethyl)adenosine 5'-(tetrahydrogen triphosphate) × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；277 K；1.1-1.25 M tri-sodium citrate, pH 5.5-8, sitting drop, temperature 277K, VAPOR DIFFUSION	Resolution 2.70 Å R-free 0.308
3GD7 Crystal structure of human NBD2 complexed with N6-Phenylethyl-ATP (P-ATP) Deposited 2009-02-23	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain A 219–371（153 aa）	Mutation：Q1280E, Y1307N, E1308A, Q1309A, W1310H, H1402A, Q1411D	B44 N-(2-phenylethyl)adenosine 5'-(tetrahydrogen triphosphate) × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；277 K；1.1-1.25 M tri-sodium citrate, pH 5.5-8, sitting drop, temperature 277K, VAPOR DIFFUSION	Resolution 2.70 Å R-free 0.308
3GD7 Crystal structure of human NBD2 complexed with N6-Phenylethyl-ATP (P-ATP) Deposited 2009-02-23	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 3 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain B 219–371（153 aa）	Mutation：Q1280E, Y1307N, E1308A, Q1309A, W1310H, H1402A, Q1411D	B44 N-(2-phenylethyl)adenosine 5'-(tetrahydrogen triphosphate) × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；277 K；1.1-1.25 M tri-sodium citrate, pH 5.5-8, sitting drop, temperature 277K, VAPOR DIFFUSION	Resolution 2.70 Å R-free 0.308
3GD7 Crystal structure of human NBD2 complexed with N6-Phenylethyl-ATP (P-ATP) Deposited 2009-02-23	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 4 Insufficient information Monomer；Protein × 1 PDB declaration: monomeric	Chain C 219–371（153 aa）	Mutation：Q1280E, Y1307N, E1308A, Q1309A, W1310H, H1402A, Q1411D	B44 N-(2-phenylethyl)adenosine 5'-(tetrahydrogen triphosphate) × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；277 K；1.1-1.25 M tri-sodium citrate, pH 5.5-8, sitting drop, temperature 277K, VAPOR DIFFUSION	Resolution 2.70 Å R-free 0.308
3GD7 Crystal structure of human NBD2 complexed with N6-Phenylethyl-ATP (P-ATP) Deposited 2009-02-23	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 5 Insufficient information Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 219–371（153 aa） Chain B 219–371（153 aa） Chain C 219–371（153 aa） Chain D 219–371（153 aa）	Mutation：Q1280E, Y1307N, E1308A, Q1309A, W1310H, H1402A, Q1411D Mutation：Q1280E, Y1307N, E1308A, Q1309A, W1310H, H1402A, Q1411D Mutation：Q1280E, Y1307N, E1308A, Q1309A, W1310H, H1402A, Q1411D Mutation：Q1280E, Y1307N, E1308A, Q1309A, W1310H, H1402A, Q1411D	B44 N-(2-phenylethyl)adenosine 5'-(tetrahydrogen triphosphate) × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；277 K；1.1-1.25 M tri-sodium citrate, pH 5.5-8, sitting drop, temperature 277K, VAPOR DIFFUSION	Resolution 2.70 Å R-free 0.308
3PUV Crystal Structure of an outward-facing MBP-Maltose transporter complex bound to ADP-VO4 Deposited 2010-12-06	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: pentameric	Chain A 1–371（371 aa） Chain B 1–371（371 aa）	Not recorded	PGV (1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE × 10 UMQ UNDECYL-MALTOSIDE × 1 MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 2 VO4 VANADATE ION × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；293 K；27% PEG 400, 0.1M HEPES, 10 mM magnesium chloride, 50 mM sodium chloride, VAPOR DIFFUSION, SITTING DROP, temperature 293K, pH 7.5	Resolution 2.40 Å R-free 0.253
3PUW Crystal Structure of an outward-facing MBP-Maltose transporter complex bound to ADP-AlF4 Deposited 2010-12-06	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: pentameric	Chain A 1–371（371 aa） Chain B 1–371（371 aa）	Not recorded	PGV (1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE × 10 UMQ UNDECYL-MALTOSIDE × 1 MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 2 ALF TETRAFLUOROALUMINATE ION × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；293 K；27 % PEG 400, 0.1 M HEPES, 10 mM magnesium chloride, 50 mM sodium chloride, VAPOR DIFFUSION, SITTING DROP, temperature 293K, pH 7.5	Resolution 2.30 Å R-free 0.255
3PUX Crystal Structure of an outward-facing MBP-Maltose transporter complex bound to ADP-BeF3 Deposited 2010-12-06	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: pentameric	Chain A 1–371（371 aa） Chain B 1–371（371 aa）	Not recorded	UMQ UNDECYL-MALTOSIDE × 1 PGV (1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE × 10 MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 2 BEF BERYLLIUM TRIFLUORIDE ION × 2	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.5；293 K；27% PEG 400, 0.1 M HEPES, 10 mM magnesium chloride, 50 mM sodium chloride, VAPOR DIFFUSION, SITTING DROP, temperature 293K, pH 7.5	Resolution 2.30 Å R-free 0.265
3RLF Crystal structure of the maltose-binding protein/maltose transporter complex in an outward-facing conformation bound to MgAMPPNP Deposited 2011-04-19	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 5 PDB declaration: pentameric	Chain A 1–371（371 aa） Chain B 1–371（371 aa）	Not recorded	UMQ UNDECYL-MALTOSIDE × 1 PGV (1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE × 4 MG MAGNESIUM ION × 2 ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.5；293 K；28% PEG 4000, 0.1M sodium hepes pH 7.5, 0.2M sodium chloride, 0.05M magnesium chloride, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.20 Å R-free 0.254
4JBW Crystal structure of E. coli maltose transporter MalFGK2 in complex with its regulatory protein EIIAglc Deposited 2013-02-20	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain A 1–371（371 aa） Chain B 1–371（371 aa）	Not recorded	PGV (1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.6；295 K；13% PEG monomethylether 2000, 100mM Sodium cacodylate pH 5.6, 100mM Non Detergent Sulfobetaine (NDSB-256), VAPOR DIFFUSION, SITTING DROP, temperature 295K	Resolution 3.91 Å R-free 0.281
4JBW Crystal structure of E. coli maltose transporter MalFGK2 in complex with its regulatory protein EIIAglc Deposited 2013-02-20	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain C 1–371（371 aa） Chain D 1–371（371 aa）	Not recorded	PGV (1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 5.6；295 K；13% PEG monomethylether 2000, 100mM Sodium cacodylate pH 5.6, 100mM Non Detergent Sulfobetaine (NDSB-256), VAPOR DIFFUSION, SITTING DROP, temperature 295K	Resolution 3.91 Å R-free 0.281
9BCR Cryo-EM structure of a bacterial prototype ATP-binding cassette transporter MalFGK2. Deposited 2024-04-09	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain C 2–371（370 aa） Chain D 2–371（370 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.26 Å
9NQJ Cryo-EM structure of a bacterial prototype ATP-binding cassette transporter MalFGK2. Deposited 2025-03-12	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 2–371（370 aa） Chain B 2–371（370 aa）	Not recorded	MG MAGNESIUM ION × 2 ADP ADENOSINE-5'-DIPHOSPHATE × 2 VO4 VANADATE ION × 2	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.34 Å

13 other PDB entries and 23 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	MALK_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–371； UniProt 1–371 Author chain B； PDBConstruct 1–371； UniProt 1–371

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	1q1e
Deposition date deposition_date	2003-07-19
Structure title title	The ATPase component of E. coli maltose transporter (MalK) in the nucleotide-free form
Keywords keywords	ATP-binding cassette, nucleotide-free form, sugar transport, TRANSPORT PROTEIN; TRANSPORT PROTEIN
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	30.26 Å
Radius of gyration Rg (electron density) rg_electron	29.25 Å
Forward intensity I(0) i0	104531000.00
Molecular weight molecular_weight	81162.0 kDa
Excluded volume excluded_volume	102140 Å³
Envelope volume envelope_volume	132320 Å³
Hydration-shell volume shell_volume	37231 Å³
Envelope diameter envelope_diameter	95.6 Å
Shell Rg shell_rg	36.96 Å
Envelope Rg envelope_rg	29.04 Å
Shape Rg shape_rg	29.24 Å
Total Rg total_rg	30.03 Å
Total atoms total_atoms	5706
Residues n_residues	734
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	90.1 Å
Rg (real space) rg_real	30.06 Å
Rg uncertainty (real space) rg_real_error	0.44 Å
I(0) (real space) i0_real	1.0450e+08
I(0) uncertainty (real space) i0_real_error	1.2560e+06
Rg (reciprocal space) rg_reciprocal	30.15 Å
I(0) (reciprocal space) i0_reciprocal	104500000.0000
Solution quality estimate total_estimate	0.9148
Solution quality rating solution_quality	EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks	0
Primary peak position r_peak_primary	— Å
Skewness Skewness skewness	0.044
Kurtosis Kurtosis kurtosis	-0.638
Angular range angular_range	— – 0.2600 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	17820000.0000
Real-space data points n_real_points	53
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.974; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.992; Smooth: 0.974

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (1)

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7. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1q1ea1
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.6 — MOP-like
Family Family family	b.40.6.3 — ABC-transporter additional domain

Domain ID domain_id	d1q1ea2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.37 — P-loop containing nucleoside triphosphate hydrolases
Superfamily Superfamily superfamily	c.37.1 — P-loop containing nucleoside triphosphate hydrolases
Family Family family	c.37.1.12 — ABC transporter ATPase domain-like

Domain ID domain_id	d1q1eb1
Class class	b — All beta proteins
Fold Fold fold	b.40 — OB-fold
Superfamily Superfamily superfamily	b.40.6 — MOP-like
Family Family family	b.40.6.3 — ABC-transporter additional domain

Domain ID domain_id	d1q1eb2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.37 — P-loop containing nucleoside triphosphate hydrolases
Superfamily Superfamily superfamily	c.37.1 — P-loop containing nucleoside triphosphate hydrolases
Family Family family	c.37.1.12 — ABC transporter ATPase domain-like

CATH v4.4 (6 domains)

Domain ID domain_id	1q1eA01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	300 — P-loop containing nucleotide triphosphate hydrolases

Domain ID domain_id	1q1eA02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	140 — Nucleic acid-binding proteins

Domain ID domain_id	1q1eA03
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	100 — RNA polymerase II/Efflux pump adaptor protein, barrel-sandwich hybrid domain

Domain ID domain_id	1q1eB01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	300 — P-loop containing nucleotide triphosphate hydrolases

Domain ID domain_id	1q1eB02
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	140 — Nucleic acid-binding proteins

Domain ID domain_id	1q1eB03
Class class	2 — Mainly Beta
Architecture architecture	40 — Beta Barrel
Topology topology	50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily	100 — RNA polymerase II/Efflux pump adaptor protein, barrel-sandwich hybrid domain

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8. Citations (1)

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Unit-cell length a length_a	64.615 Å
Unit-cell length b length_b	102.041 Å
Unit-cell length c length_c	99.288 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	107.10 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	2.900 Å
Low-resolution limit resolution_low	15.780 Å
R factor r_factor	0.2440
R_work r_work	0.2440
R_free r_free	0.2760

Description description	Maltose/maltodextrin transport ATP-binding protein malK
Molecular weight formula_weight	42184.5 kDa
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	5706

The ATPase component of E. coli maltose transporter (MalK) in the nucleotide-free form

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

Maltose/maltodextrin transport ATP-binding protein malK

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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

来源 Source

7. Fold Classification (SCOP + CATH) 10 domains

SCOP 2.08 (4 domains)

CATH v4.4 (6 domains)

8. Citations (1)

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来源生物 organism	Escherichia coli
NCBI Class编号 ncbi_taxonomy_id	83333
宿主生物 host_organism	Escherichia coli

fit	/app/data/saxs_computation/q1/1q1e/1q1e.fit
pddf	/app/data/pr_computation/q1/1q1e/1q1e.pr.out
profile	/app/data/saxs_computation/q1/1q1e/1q1e.dat