SAXSdb — 1znv

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

Colicin E7 immunity protein

Escherichia coli str. K12 substr.

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 × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain A； UniProt 1–87	Not recorded	Colicin E7 × 1 （Q47112） NI NICKEL (II) ION × 1 PO4 PHOSPHATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 5.7；298 K；0.3M phosphate buffer, 50mM NaCl, 20% PEG550 MME, 10% glycerol, pH 5.7, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.00 Å R-free 0.235
2	Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain C； UniProt 1–87	Not recorded	Colicin E7 × 1 （Q47112） NI NICKEL (II) ION × 1 PO4 PHOSPHATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 5.7；298 K；0.3M phosphate buffer, 50mM NaCl, 20% PEG550 MME, 10% glycerol, pH 5.7, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.00 Å R-free 0.235

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 1ZNV	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1AYI COLICIN E7 IMMUNITY PROTEIN IM7 Deposited 1997-11-04	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–87（87 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.2；USING THE HANGING DROP METHOD, PROTEIN (10MG/ML) WAS CRYSTALLISED BY MIXING AN EQUAL VOLUME OF PROTEIN WITH A SOLUTION CONTAINING 55% SATURATED DI-AMMONIUM PHOSPHATE AND 200MM TRIS PH7.2. THE DROP WAS EQUILIBRATED AGAINST A WELL CONTAINING 100% SATURATED DI-AMMONIUM PHOSPHATE AT ROOM TEMPERATURE., vapor diffusion - hanging drop	Resolution 2.00 Å R-free 0.247
1CEI STRUCTURE DETERMINATION OF THE COLICIN E7 IMMUNITY PROTEIN (IMME7) THAT BINDS SPECIFICALLY TO THE DNASE-TYPE COLICIN E7 AND INHIBITS ITS BACTERIOCIDAL ACTIVITY Deposited 1996-03-19	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–87（87 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 8；pH 8.	Resolution 1.80 Å
1MZ8 CRYSTAL STRUCTURES OF THE NUCLEASE DOMAIN OF COLE7/IM7 IN COMPLEX WITH A PHOSPHATE ION AND A ZINC ION Deposited 2002-10-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 1–87（87 aa）	Not recorded	ZN ZINC ION × 1 PO4 PHOSPHATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.3；298 K；PEG4000, sodium phosphate, ammonium acetate, pH 6.3, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.00 Å R-free 0.230
1MZ8 CRYSTAL STRUCTURES OF THE NUCLEASE DOMAIN OF COLE7/IM7 IN COMPLEX WITH A PHOSPHATE ION AND A ZINC ION Deposited 2002-10-07	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain C 1–87（87 aa）	Not recorded	ZN ZINC ION × 1 PO4 PHOSPHATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.3；298 K；PEG4000, sodium phosphate, ammonium acetate, pH 6.3, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.00 Å R-free 0.230
1UJZ Crystal structure of the E7_C/Im7_C complex; a computationally designed interface between the colicin E7 DNase and the Im7 Immunity protein Deposited 2003-08-13	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 1–87（87 aa）	Mutation：D35Y,	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.6；298 K；PEGMME 2000, ammonium sulfate, Sodium Acetate, Glycerol, DMSO, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.10 Å R-free 0.270
1UNK STRUCTURE OF COLICIN E7 IMMUNITY PROTEIN Deposited 1996-06-21	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 4 PDB declaration: tetrameric	Chain A 1–87（87 aa） Chain B 1–87（87 aa） Chain C 1–87（87 aa） Chain D 1–87（87 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 1.80 Å R-free 0.251
2ERH Crystal Structure of the E7_G/Im7_G complex; a designed interface between the colicin E7 DNAse and the Im7 immunity protein Deposited 2005-10-24	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 1–87（87 aa）	Mutation：D35Y, T51Q	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.6；298 K；30% PEG 4K, 0.6M ammonium acetate, 50mM Na acetate, 25% glycerol, 5% DMSO, pH 5.6, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.00 Å R-free 0.271
2JAZ CRYSTAL STRUCTURE OF THE MUTANT N560D OF THE NUCLEASE DOMAIN OF COLE7 IN COMPLEX WITH IM7 Deposited 2006-12-01	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric	Chain A 1–87（87 aa） Chain C 1–87（87 aa）	Not recorded	ZN ZINC ION × 4 PO4 PHOSPHATE ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions pH 7；20 % W/V PEG3350 AND 0.1 M DI-AMMONIUM HYDROGEN CITRATE, pH 7.00	Resolution 2.03 Å R-free 0.249
2JB0 CRYSTAL STRUCTURE OF THE MUTANT H573A OF THE NUCLEASE DOMAIN OF COLE7 IN COMPLEX WITH IM7 Deposited 2006-12-01	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric	Chain A 1–87（87 aa）	Not recorded	ZN ZINC ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions pH 7；20 % W/V PEG3350 AND 0.2 M DI-AMMONIUM HYDROGEN CITRATE, pH 7.00	Resolution 1.91 Å R-free 0.250
2JBG crystal structure of the mutant N560A of the nuclease domain of ColE7 in complex with Im7 Deposited 2006-12-07	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric	Chain A 1–87（87 aa） Chain C 1–87（87 aa）	Not recorded	ZN ZINC ION × 4 SO4 SULFATE ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions pH 4.6；20 % W/V POLYETHYLENE GLYCOL MONOMETHYL ETHER 2000, 0.2 M AMMONIUM SULFATE, AND 0.1 M SODIUM ACETATE TRIHYDRATE AT PH 4.6	Resolution 2.20 Å R-free 0.249
2K0D NMR structure of a mutant colicin e7 immunity protein im7 with an extended helix III Deposited 2008-02-01	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain X 2–51（50 aa） Chain X 65–87（23 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR NMR measurement conditions 298 K；Ionic strength (raw mmCIF value) 50；Pressure ambient NMR measurement conditions 298 K；Ionic strength (raw mmCIF value) 50；Pressure ambient NMR measurement conditions 298 K；Ionic strength (raw mmCIF value) 50；Pressure ambient NMR sample composition 1 mM [U-99% 13C; U-99% 15N] potassium phosphate, 90% H2O/10% D2O \| 90% H2O/10% D2O NMR sample composition 1 mM [U-99% 15N] potassium phosphate, 90% H2O/10% D2O \| 90% H2O/10% D2O NMR sample composition 1 mM [U-99% 13C; U-99% 15N] potassium phosphate, 100% D2O \| 100% D2O	Resolution not provided
4F37 Structure of the tethered N-terminus of Alzheimer's disease A peptide Deposited 2012-05-09	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 2–87（86 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8.5；293 K；0.2M Sodium malonate, 20% (w/v) PEG 3350, 0.1M Bis-tris propane pH 8.5, 0.2M 1-methylimidazolium formate, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.57 Å R-free 0.269
4F37 Structure of the tethered N-terminus of Alzheimer's disease A peptide Deposited 2012-05-09	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain B 2–87（86 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 8.5；293 K；0.2M Sodium malonate, 20% (w/v) PEG 3350, 0.1M Bis-tris propane pH 8.5, 0.2M 1-methylimidazolium formate, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 2.57 Å R-free 0.269
5WNW Chaperone Spy bound to Im7 6-45 ensemble Deposited 2017-08-01	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain C 6–45（40 aa） Fragment：UNP residues 6-45	Not recorded	IMD IMIDAZOLE × 3 ZN ZINC ION × 8 CL CHLORIDE ION × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 8；293 K；PEG 3000, imidazole, zinc acetate	Resolution 1.79 Å R-free 0.238
7CEI THE ENDONUCLEASE DOMAIN OF COLICIN E7 IN COMPLEX WITH ITS INHIBITOR IM7 PROTEIN Deposited 1998-09-17	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 1–87（87 aa）	Not recorded	ZN ZINC ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 6；15 MG/ML PROTEIN COMPLEX, 5 MM NA CITRATE, 0.25 M NH4 ACETATE, 10% PEG4000, PH 6.0 VAPOR DIFFUSION AGAINST 22.5% PEG4000	Resolution 2.30 Å R-free 0.270

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

View Construct and Data Evidence

UniProt name	IMM7_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–87； UniProt 1–87 Author chain C； PDBConstruct 1–87； UniProt 1–87

Colicin E7

Escherichia coli str. K12 substr.

UniProt Q47112

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 × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain B； UniProt 444–576	Fragment：Nuclease domain Mutation：H545E	Colicin E7 immunity protein × 1 （Q03708） NI NICKEL (II) ION × 1 PO4 PHOSPHATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 5.7；298 K；0.3M phosphate buffer, 50mM NaCl, 20% PEG550 MME, 10% glycerol, pH 5.7, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.00 Å R-free 0.235
2	Protein heterocomplex Heteromer Protein × 2 PDB declaration: dimeric（2） Consistent with protein copy count	Chain D； UniProt 444–576	Fragment：Nuclease domain Mutation：H545E	Colicin E7 immunity protein × 1 （Q03708） NI NICKEL (II) ION × 1 PO4 PHOSPHATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, HANGING DROP；pH 5.7；298 K；0.3M phosphate buffer, 50mM NaCl, 20% PEG550 MME, 10% glycerol, pH 5.7, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.00 Å R-free 0.235

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 1ZNV	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1M08 Crystal structure of the unbound nuclease domain of ColE7 Deposited 2002-06-12	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 447–576（130 aa） Fragment：Nuclease Domain Chain B 447–576（130 aa） Fragment：Nuclease Domain	Not recorded	ZN ZINC ION × 2 PO4 PHOSPHATE ION × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；298 K；sodium phosphate, Sodium Chloride, zinc chloride, ammonium acetate, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K	Resolution 2.10 Å R-free 0.240
1MZ8 CRYSTAL STRUCTURES OF THE NUCLEASE DOMAIN OF COLE7/IM7 IN COMPLEX WITH A PHOSPHATE ION AND A ZINC ION Deposited 2002-10-07	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 446–576（131 aa） Fragment：nuclease domain	Not recorded	ZN ZINC ION × 1 PO4 PHOSPHATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.3；298 K；PEG4000, sodium phosphate, ammonium acetate, pH 6.3, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.00 Å R-free 0.230
1MZ8 CRYSTAL STRUCTURES OF THE NUCLEASE DOMAIN OF COLE7/IM7 IN COMPLEX WITH A PHOSPHATE ION AND A ZINC ION Deposited 2002-10-07	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain D 446–576（131 aa） Fragment：nuclease domain	Not recorded	ZN ZINC ION × 1 PO4 PHOSPHATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.3；298 K；PEG4000, sodium phosphate, ammonium acetate, pH 6.3, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.00 Å R-free 0.230
1PT3 Crystal structures of nuclease-ColE7 complexed with octamer DNA Deposited 2003-06-22	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Homooligomer；Protein × 2 PDB declaration: octameric	Chain A 449–576（128 aa） Fragment：residues 449-576 Chain B 449–576（128 aa） Fragment：residues 449-576	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 7.5；298 K；2.5 mM EDTA, 12.5 mM Tris-HCl (pH 7.5), 0.1 M Ammonium Formate, and 10 % PEG 3350, VAPOR DIFFUSION, HANGING DROP, temperature 298.0K, pH 7.50	Resolution 2.50 Å R-free 0.289
1UJZ Crystal structure of the E7_C/Im7_C complex; a computationally designed interface between the colicin E7 DNase and the Im7 Immunity protein Deposited 2003-08-13	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 446–573（128 aa） Fragment：residues 446-573	Mutation：K528Q, T539R, H569A	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.6；298 K；PEGMME 2000, ammonium sulfate, Sodium Acetate, Glycerol, DMSO, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.10 Å R-free 0.270
1ZNS Crystal structure of N-ColE7/12-bp DNA/Zn complex Deposited 2005-05-12	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Monomer；Protein × 1 PDB declaration: trimeric	Chain A 444–576（133 aa） Fragment：nuclease domain	Mutation：H545E	ZN ZINC ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.5；298 K；25mM Tris-HCl, 0.1M Ammonium chloride, 10.5% MPD, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.50 Å R-free 0.287
2AXC Crystal structure of ColE7 translocation domain Deposited 2005-09-04	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 60–316（257 aa） Fragment：N-terminal Translocation domain	Non-standard monomer：Yes (specific site not provided by mmCIF)	SO4 SULFATE ION × 1 GOL GLYCEROL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.5；298 K；0.1M Tris-HCl pH 8.5, 1.5M (NH4)2SO4, 12% glycerol, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.70 Å R-free 0.208
2ERH Crystal Structure of the E7_G/Im7_G complex; a designed interface between the colicin E7 DNAse and the Im7 immunity protein Deposited 2005-10-24	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 447–573（127 aa）	Mutation：N516T, N517Q, K525R, K528Q, T539Q	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.6；298 K；30% PEG 4K, 0.6M ammonium acetate, 50mM Na acetate, 25% glycerol, 5% DMSO, pH 5.6, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.00 Å R-free 0.271
2IVH Crystal structure of the nuclease domain of ColE7 (H545Q mutant) in complex with an 18-bp duplex DNA Deposited 2006-06-13	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Monomer；Protein × 1 PDB declaration: trimeric	Chain A 449–576（128 aa） Fragment：NUCLEASE DOMAIN, RESIDUES 449-576	Mutation：YES	ZN ZINC ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 4.8；HANGING DROP VAPOR DIFFUSION METHOD BY MIXING 1 MICRO L COMPLEX SOLUTION AND 1 MICRO L RESERVOIR SOLUTION CONSISTING OF 40 % MPD, 0.4 M AMMONIUM FORMATE AND 0.1 M ACETATE BUFFER (PH4.8) AT ROOM TEMPERATURE., pH 4.80	Resolution 2.80 Å R-free 0.265
2JAZ CRYSTAL STRUCTURE OF THE MUTANT N560D OF THE NUCLEASE DOMAIN OF COLE7 IN COMPLEX WITH IM7 Deposited 2006-12-01	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric	Chain B 446–576（131 aa） Fragment：NUCLEASE DOMAIN, RESIDUES 446-576 Chain D 446–576（131 aa） Fragment：NUCLEASE DOMAIN, RESIDUES 446-576	Mutation：YES Mutation：YES	ZN ZINC ION × 4 PO4 PHOSPHATE ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions pH 7；20 % W/V PEG3350 AND 0.1 M DI-AMMONIUM HYDROGEN CITRATE, pH 7.00	Resolution 2.03 Å R-free 0.249
2JB0 CRYSTAL STRUCTURE OF THE MUTANT H573A OF THE NUCLEASE DOMAIN OF COLE7 IN COMPLEX WITH IM7 Deposited 2006-12-01	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric	Chain B 446–576（131 aa） Fragment：NUCLEASE DOMAIN, RESIDUES 446-576	Mutation：YES	ZN ZINC ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions pH 7；20 % W/V PEG3350 AND 0.2 M DI-AMMONIUM HYDROGEN CITRATE, pH 7.00	Resolution 1.91 Å R-free 0.250
2JBG crystal structure of the mutant N560A of the nuclease domain of ColE7 in complex with Im7 Deposited 2006-12-07	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric	Chain B 446–576（131 aa） Fragment：NUCLEASE DOMAIN, RESIDUES 446-576 Chain D 446–576（131 aa） Fragment：NUCLEASE DOMAIN, RESIDUES 446-576	Mutation：YES Mutation：YES	ZN ZINC ION × 4 SO4 SULFATE ION × 4	X-RAY DIFFRACTION X-ray crystallization conditions pH 4.6；20 % W/V POLYETHYLENE GLYCOL MONOMETHYL ETHER 2000, 0.2 M AMMONIUM SULFATE, AND 0.1 M SODIUM ACETATE TRIHYDRATE AT PH 4.6	Resolution 2.20 Å R-free 0.249
3FBD Crystal structure of the nuclease domain of COLE7(D493Q mutant) in complex with an 18-BP duplex DNA Deposited 2008-11-19	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein–DNA Monomer；Protein × 1 PDB declaration: trimeric	Chain A 445–576（132 aa） Fragment：NUCLEASE DOMAIN	Mutation：D493Q	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；298 K；15% PEG 3350, 16.25% MPD, 0.15M ammonium acetate, 0.025M sodium acetate, pH 8, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.90 Å R-free 0.264
3FBD Crystal structure of the nuclease domain of COLE7(D493Q mutant) in complex with an 18-BP duplex DNA Deposited 2008-11-19	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein–DNA Monomer；Protein × 1 PDB declaration: trimeric	Chain D 445–576（132 aa） Fragment：NUCLEASE DOMAIN	Mutation：D493Q	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8；298 K；15% PEG 3350, 16.25% MPD, 0.15M ammonium acetate, 0.025M sodium acetate, pH 8, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 2.90 Å R-free 0.264
3GJN Following evolutionary paths to high affinity and selectivity protein-protein interactions using Colicin7 and Immunity proteins Deposited 2009-03-09	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 446–576（131 aa） Fragment：UNP residues 446-576	Mutation：N1024D, D1026E, T1027A, S1028T, V1034D, V1037I, Y1055W	ZN ZINC ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 10.5；292 K；30% PEG40, pH10.5, Microbatch under oil, temperature 292K	Resolution 2.48 Å R-free 0.276
3GJN Following evolutionary paths to high affinity and selectivity protein-protein interactions using Colicin7 and Immunity proteins Deposited 2009-03-09	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 3 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain C 446–576（131 aa） Fragment：UNP residues 446-576	Mutation：N1024D, D1026E, T1027A, S1028T, V1034D, V1037I, Y1055W	ZN ZINC ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 10.5；292 K；30% PEG40, pH10.5, Microbatch under oil, temperature 292K	Resolution 2.48 Å R-free 0.276
3GKL Following evolutionary paths to high affinity and selectivity protein-protein interactions using Colicin7 and Immunity proteins Deposited 2009-03-11	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 446–576（131 aa） Fragment：UNP residues 446-576	Mutation：T20A, N24D, T27A, S28T, V34D, V37I, E41G, K57E	ZN ZINC ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 9；292 K；30% PEG 400, 0.1 CHES pH 9.0, VAPOR DIFFUSION, SITTING DROP, temperature 292K	Resolution 2.20 Å R-free 0.277
3GKL Following evolutionary paths to high affinity and selectivity protein-protein interactions using Colicin7 and Immunity proteins Deposited 2009-03-11	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 446–576（131 aa） Fragment：UNP residues 446-576	Mutation：T20A, N24D, T27A, S28T, V34D, V37I, E41G, K57E	ZN ZINC ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 9；292 K；30% PEG 400, 0.1 CHES pH 9.0, VAPOR DIFFUSION, SITTING DROP, temperature 292K	Resolution 2.20 Å R-free 0.277
3ZFK N-terminal truncated Nuclease Domain of Colicin E7 Deposited 2012-12-11	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 450–573（124 aa） Fragment：COLICIN E7 METALLONUCLEASE DOMAIN, RESIDUES 450-573	Not recorded	ZN ZINC ION × 1 CL CHLORIDE ION × 1 SO4 SULFATE ION × 5	X-RAY DIFFRACTION X-ray crystallization conditions pH 4.5；0.1 M LITHIUM SULFATE, 50 MM SODIUM ACETATE PH 4.5, 25 % W/V PEG 400	Resolution 1.70 Å R-free 0.234
3ZFK N-terminal truncated Nuclease Domain of Colicin E7 Deposited 2012-12-11	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 450–573（124 aa） Fragment：COLICIN E7 METALLONUCLEASE DOMAIN, RESIDUES 450-573	Not recorded	ZN ZINC ION × 1 CL CHLORIDE ION × 1 SO4 SULFATE ION × 4 ACT ACETATE ION × 2	X-RAY DIFFRACTION X-ray crystallization conditions pH 4.5；0.1 M LITHIUM SULFATE, 50 MM SODIUM ACETATE PH 4.5, 25 % W/V PEG 400	Resolution 1.70 Å R-free 0.234
7CEI THE ENDONUCLEASE DOMAIN OF COLICIN E7 IN COMPLEX WITH ITS INHIBITOR IM7 PROTEIN Deposited 1998-09-17	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 1–206（206 aa） Fragment：ENDONUCLEASE DOMAIN	Not recorded	ZN ZINC ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 6；15 MG/ML PROTEIN COMPLEX, 5 MM NA CITRATE, 0.25 M NH4 ACETATE, 10% PEG4000, PH 6.0 VAPOR DIFFUSION AGAINST 22.5% PEG4000	Resolution 2.30 Å R-free 0.270

16 other PDB entries and 21 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	CEA7_ECOLI
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 2–134； UniProt 444–576 Author chain D； PDBConstruct 2–134； UniProt 444–576

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	1znv
Deposition date deposition_date	2005-05-12
Structure title title	How a His-metal finger endonuclease ColE7 binds and cleaves DNA with a transition metal ion cofactor
Keywords keywords	H-N-H motif, Ni-binding, protein-protein complex, endonuclease, Hydrolase-PROTEIN BINDING COMPLEX; Hydrolase/PROTEIN BINDING
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	24.63 Å
Radius of gyration Rg (electron density) rg_electron	23.65 Å
Forward intensity I(0) i0	40557600.00
Molecular weight molecular_weight	47482.0 kDa
Excluded volume excluded_volume	58834 Å³
Envelope volume envelope_volume	71517 Å³
Hydration-shell volume shell_volume	25768 Å³
Envelope diameter envelope_diameter	84.1 Å
Shell Rg shell_rg	30.50 Å
Envelope Rg envelope_rg	23.72 Å
Shape Rg shape_rg	23.61 Å
Total Rg total_rg	24.57 Å
Total atoms total_atoms	3340
Residues n_residues	412
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	84.4 Å
Rg (real space) rg_real	24.67 Å
Rg uncertainty (real space) rg_real_error	0.56 Å
I(0) (real space) i0_real	4.0560e+07
I(0) uncertainty (real space) i0_real_error	5.7270e+05
Rg (reciprocal space) rg_reciprocal	24.66 Å
I(0) (reciprocal space) i0_reciprocal	40560000.0000
Solution quality estimate total_estimate	0.8679
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	1
Primary peak position r_peak_primary	26.8 Å
Skewness Skewness skewness	0.420
Kurtosis Kurtosis kurtosis	-0.219
Angular range angular_range	— – 0.3200 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	9574000.0000
Real-space data points n_real_points	64
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.784; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.933; Smooth: 0.992

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (5)

Entity 1 Entity 1 polymer

Description description	Colicin E7 immunity protein
Molecular weight formula_weight	10735.8 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,C
Atom count atom_count	3763

MELKNSISDYTEAEFVQLLKEIEKENVAATDDVLDVLLEHFVKITEHPDGTDLIYYPSDNRDDSPEGIVKEIKEWRAANGKPGFKQGHHHHHH

来源 Source

来源生物 organism	Escherichia coli str. K12 substr.
NCBI Class编号 ncbi_taxonomy_id	316407
宿主生物 host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	Colicin E7
Molecular weight formula_weight	15400.5 kDa
EC 编号 ec_number	3.1.-.-
Mutation mutation	H545E
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B,D

MESKRNKPGKATGKGKPVNNKWLNNAGKDLGSPVPDRIANKLRDKEFKSFDDFRKKFWEEVSKDPELSKQFSRNNNDRMKVGKAPKTRTQDVSGKRTSFELHEEKPISQNGGVYDMDNISVVTPKRHIDIHRGK

来源 Source

来源生物 organism	Escherichia coli str. K12 substr.
NCBI Class编号 ncbi_taxonomy_id	316407
宿主生物 host_organism	Escherichia coli

Entity 3 Entity 3 non-polymer

Description description	NICKEL (II) ION
Molecular weight formula_weight	58.7 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 non-polymer

Description description	PHOSPHATE ION
Molecular weight formula_weight	95.0 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	423

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7. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1znva_
Class class	a — All alpha proteins
Fold Fold fold	a.28 — Acyl carrier protein-like
Superfamily Superfamily superfamily	a.28.2 — Colicin E immunity proteins
Family Family family	a.28.2.1 — Colicin E immunity proteins

Domain ID domain_id	d1znvb_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.4 — His-Me finger endonucleases
Superfamily Superfamily superfamily	d.4.1 — His-Me finger endonucleases
Family Family family	d.4.1.1 — HNH-motif

Domain ID domain_id	d1znvc_
Class class	a — All alpha proteins
Fold Fold fold	a.28 — Acyl carrier protein-like
Superfamily Superfamily superfamily	a.28.2 — Colicin E immunity proteins
Family Family family	a.28.2.1 — Colicin E immunity proteins

Domain ID domain_id	d1znvd_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.4 — His-Me finger endonucleases
Superfamily Superfamily superfamily	d.4.1 — His-Me finger endonucleases
Family Family family	d.4.1.1 — HNH-motif

CATH v4.4 (4 domains)

Domain ID domain_id	1znvA00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1200 — Non-ribosomal Peptide Synthetase Peptidyl Carrier Protein; Chain A
Homologous superfamily homologous superfamily	20 — Colicin E immunity protein

Domain ID domain_id	1znvB00
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	540 — Colicin E7 immunity protein; Chain B, fragment: Endonuclease domain
Homologous superfamily homologous superfamily	10 — Colicin/pyocin, DNase domain

Domain ID domain_id	1znvC00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	1200 — Non-ribosomal Peptide Synthetase Peptidyl Carrier Protein; Chain A
Homologous superfamily homologous superfamily	20 — Colicin E immunity protein

Domain ID domain_id	1znvD00
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	540 — Colicin E7 immunity protein; Chain B, fragment: Endonuclease domain
Homologous superfamily homologous superfamily	10 — Colicin/pyocin, DNase domain

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8. Citations (1)

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Unit-cell length a length_a	119.021 Å
Unit-cell length b length_b	62.882 Å
Unit-cell length c length_c	74.769 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	8

Space group space_group	P 21 21 2
Space-group number int_tables_number	18
Crystal system crystal_system	—

Resolution resolution	2.000 Å
Low-resolution limit resolution_low	27.650 Å
R factor r_factor	0.1880
R_work r_work	0.1880
R_free r_free	0.2350

fit	/app/data/saxs_computation/zn/1znv/1znv.fit
pddf	/app/data/pr_computation/zn/1znv/1znv.pr.out
profile	/app/data/saxs_computation/zn/1znv/1znv.dat

How a His-metal finger endonuclease ColE7 binds and cleaves DNA with a transition metal ion cofactor

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

Colicin E7 immunity protein

State in the Current Structure

Other States of the Same Protein in the Database

Colicin E7

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 (5)

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 water

7. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

8. Citations (1)

9. Files and Curves (10)

Files (7)

Curves (3)