Signal peptidase I
Escherichia coli (strain K12)
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 monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count | Chain A; UniProt 78–324 | Not recorded | CZD (8S,11S,14S)-14-{[(2S)-4-amino-2-{[2-(4-tert-butylphenyl)-4-methylpyrimidine-5-carbonyl]amino}butanoyl](methyl)amino}-3,18-bis(2-aminoethoxy)-N-[(2Z)-2-iminoethyl]-11-methyl-10,13-dioxo-9,12-diazatricyclo[13.3.1.1~2,6~]icosa-1(19),2(20),3,5,15,17-hexaene-8-carboxamide × 1 | X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION;pH 4.5;292 K;30% PEG 300, 0.1 M Sodium Acetate pH 4.5 | Resolution 2.41 Å R-free 0.265 |
| 2 | Protein monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count | Chain B; UniProt 78–324 | Not recorded | CZD (8S,11S,14S)-14-{[(2S)-4-amino-2-{[2-(4-tert-butylphenyl)-4-methylpyrimidine-5-carbonyl]amino}butanoyl](methyl)amino}-3,18-bis(2-aminoethoxy)-N-[(2Z)-2-iminoethyl]-11-methyl-10,13-dioxo-9,12-diazatricyclo[13.3.1.1~2,6~]icosa-1(19),2(20),3,5,15,17-hexaene-8-carboxamide × 1 1PE PENTAETHYLENE GLYCOL × 1 | X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION;pH 4.5;292 K;30% PEG 300, 0.1 M Sodium Acetate pH 4.5 | Resolution 2.41 Å R-free 0.265 |
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 6B88 | Assembly / Oligomeric State | Construct | Mutations and Modifications | Ligands, Ions and Non-polymers | Method and Experimental Conditions | Structure Quality |
|---|---|---|---|---|---|---|---|
| 1B12 CRYSTAL STRUCTURE OF TYPE 1 SIGNAL PEPTIDASE FROM ESCHERICHIA COLI IN COMPLEX WITH A BETA-LACTAM INHIBITOR Deposited 1999-11-24 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
77–324(248 aa)
Fragment:CATALYTIC DOMAIN
|
Not recorded | 1PN prop-2-en-1-yl (2S)-2-[(2S,3R)-3-(acetyloxy)-1-oxobutan-2-yl]-2,3-dihydro-1,3-thiazole-4-carboxylate × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
pH 4.6;pH 4.6
|
Resolution 1.95 Å R-free 0.246 |
| 1B12 CRYSTAL STRUCTURE OF TYPE 1 SIGNAL PEPTIDASE FROM ESCHERICHIA COLI IN COMPLEX WITH A BETA-LACTAM INHIBITOR Deposited 1999-11-24 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 2 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain B
77–324(248 aa)
Fragment:CATALYTIC DOMAIN
|
Not recorded | 1PN prop-2-en-1-yl (2S)-2-[(2S,3R)-3-(acetyloxy)-1-oxobutan-2-yl]-2,3-dihydro-1,3-thiazole-4-carboxylate × 1 PO4 PHOSPHATE ION × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
pH 4.6;pH 4.6
|
Resolution 1.95 Å R-free 0.246 |
| 1B12 CRYSTAL STRUCTURE OF TYPE 1 SIGNAL PEPTIDASE FROM ESCHERICHIA COLI IN COMPLEX WITH A BETA-LACTAM INHIBITOR Deposited 1999-11-24 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 3 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain C
77–324(248 aa)
Fragment:CATALYTIC DOMAIN
|
Not recorded | 1PN prop-2-en-1-yl (2S)-2-[(2S,3R)-3-(acetyloxy)-1-oxobutan-2-yl]-2,3-dihydro-1,3-thiazole-4-carboxylate × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
pH 4.6;pH 4.6
|
Resolution 1.95 Å R-free 0.246 |
| 1B12 CRYSTAL STRUCTURE OF TYPE 1 SIGNAL PEPTIDASE FROM ESCHERICHIA COLI IN COMPLEX WITH A BETA-LACTAM INHIBITOR Deposited 1999-11-24 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 4 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain D
77–324(248 aa)
Fragment:CATALYTIC DOMAIN
|
Not recorded | 1PN prop-2-en-1-yl (2S)-2-[(2S,3R)-3-(acetyloxy)-1-oxobutan-2-yl]-2,3-dihydro-1,3-thiazole-4-carboxylate × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
pH 4.6;pH 4.6
|
Resolution 1.95 Å R-free 0.246 |
| 1KN9 CRYSTAL STRUCTURE OF A BACTERIAL SIGNAL PEPTIDASE APO-ENZYME, IMPLICATIONS FOR SIGNAL PEPTIDE BINDING AND THE SER-LYS DYAD MECHANISM. Deposited 2001-12-18 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain A
77–324(248 aa)
Fragment:Residues 76-323, plus initiating methionine
|
Not recorded | No recorded non-water small molecule |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 5.4;295 K;ammonium dihydrogen phosphate, sodium citrate, Triton X-100, pH 5.4, VAPOR DIFFUSION, SITTING DROP, temperature 295K
|
Resolution 2.40 Å R-free 0.278 |
| 1KN9 CRYSTAL STRUCTURE OF A BACTERIAL SIGNAL PEPTIDASE APO-ENZYME, IMPLICATIONS FOR SIGNAL PEPTIDE BINDING AND THE SER-LYS DYAD MECHANISM. Deposited 2001-12-18 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 2 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain B
77–324(248 aa)
Fragment:Residues 76-323, plus initiating methionine
|
Not recorded | No recorded non-water small molecule |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 5.4;295 K;ammonium dihydrogen phosphate, sodium citrate, Triton X-100, pH 5.4, VAPOR DIFFUSION, SITTING DROP, temperature 295K
|
Resolution 2.40 Å R-free 0.278 |
| 1KN9 CRYSTAL STRUCTURE OF A BACTERIAL SIGNAL PEPTIDASE APO-ENZYME, IMPLICATIONS FOR SIGNAL PEPTIDE BINDING AND THE SER-LYS DYAD MECHANISM. Deposited 2001-12-18 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 3 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain C
77–324(248 aa)
Fragment:Residues 76-323, plus initiating methionine
|
Not recorded | No recorded non-water small molecule |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 5.4;295 K;ammonium dihydrogen phosphate, sodium citrate, Triton X-100, pH 5.4, VAPOR DIFFUSION, SITTING DROP, temperature 295K
|
Resolution 2.40 Å R-free 0.278 |
| 1KN9 CRYSTAL STRUCTURE OF A BACTERIAL SIGNAL PEPTIDASE APO-ENZYME, IMPLICATIONS FOR SIGNAL PEPTIDE BINDING AND THE SER-LYS DYAD MECHANISM. Deposited 2001-12-18 | Different construct Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 4 Protein monomer Monomer;Protein × 1 PDB declaration: monomeric |
Chain D
77–324(248 aa)
Fragment:Residues 76-323, plus initiating methionine
|
Not recorded | No recorded non-water small molecule |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 5.4;295 K;ammonium dihydrogen phosphate, sodium citrate, Triton X-100, pH 5.4, VAPOR DIFFUSION, SITTING DROP, temperature 295K
|
Resolution 2.40 Å R-free 0.278 |
| 1T7D Crystal structure of Escherichia coli type I signal peptidase in complex with a lipopeptide inhibitor Deposited 2004-05-09 | Different construct 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
76–324(249 aa)
Fragment:RESIDUES 76-324
|
Not recorded | M12 10-METHYLUNDECANOIC ACID × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
pH 6;0.5% TRITON X-100, 15% PEG 4000, 20% PROPANOL, 0.1 M SODIUM CITRATE, PH 6.0, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 298K
|
Resolution 2.47 Å R-free 0.283 |
| 1T7D Crystal structure of Escherichia coli type I signal peptidase in complex with a lipopeptide inhibitor Deposited 2004-05-09 | Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 2 Protein heterocomplex Heteromer;Protein × 2 PDB declaration: dimeric |
Chain A
76–324(249 aa)
Fragment:RESIDUES 76-324
|
Not recorded | M12 10-METHYLUNDECANOIC ACID × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
pH 6;0.5% TRITON X-100, 15% PEG 4000, 20% PROPANOL, 0.1 M SODIUM CITRATE, PH 6.0, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 298K
|
Resolution 2.47 Å R-free 0.283 |
| 3IIQ Crystallographic analysis of bacterial signal peptidase in ternary complex with Arylomycin A2 and a beta-sultam inhibitor Deposited 2009-08-03 | Different construct 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
77–324(248 aa)
Fragment:UNP RESIDUES 76-323, PERIPLASMIC DOMAIN
|
Not recorded | JZA 4-[(1,1-dioxido-1,2-thiazetidin-2-yl)carbonyl]morpholine × 1 TRT FRAGMENT OF TRITON X-100 × 1 M12 10-METHYLUNDECANOIC ACID × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
pH 6.5;0.2M NH4 FORMATE, 25% PEG 2000, 0.1M NA CACODYLATE PH 6.5, AND 5% TERTIARY-AMYL ALCOHOL, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 291K
|
Resolution 2.00 Å R-free 0.250 |
| 3IIQ Crystallographic analysis of bacterial signal peptidase in ternary complex with Arylomycin A2 and a beta-sultam inhibitor Deposited 2009-08-03 | Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 2 Protein heterocomplex Heteromer;Protein × 2 PDB declaration: dimeric |
Chain A
77–324(248 aa)
Fragment:UNP RESIDUES 76-323, PERIPLASMIC DOMAIN
|
Not recorded | JZA 4-[(1,1-dioxido-1,2-thiazetidin-2-yl)carbonyl]morpholine × 1 TRT FRAGMENT OF TRITON X-100 × 1 GOL GLYCEROL × 4 CCN ACETONITRILE × 2 M12 10-METHYLUNDECANOIC ACID × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
pH 6.5;0.2M NH4 FORMATE, 25% PEG 2000, 0.1M NA CACODYLATE PH 6.5, AND 5% TERTIARY-AMYL ALCOHOL, VAPOR DIFFUSION, SITTING DROP, TEMPERATURE 291K
|
Resolution 2.00 Å R-free 0.250 |
| 3S04 Crystal structure of Escherichia coli type I signal peptidase in complex with an Arylomycin Lipoglycopeptide Antibiotic Deposited 2011-05-13 | Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 1 Protein heterocomplex Heteromer;Protein × 2 PDB declaration: dimeric |
Chain A
76–324(249 aa)
Fragment:Periplasmic domain, UNP residues 76-323
|
Not recorded | 02U 14-methylhexadec-9-enoic acid × 1 RAM alpha-L-rhamnopyranose × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 7.4;293 K;22% PEG 4000, 0.2M KCl, 0.025M n-dodecyl beta-D-maltoside (DDM), pH 7.4, VAPOR DIFFUSION, SITTING DROP, temperature 293K
|
Resolution 2.44 Å R-free 0.265 |
| 3S04 Crystal structure of Escherichia coli type I signal peptidase in complex with an Arylomycin Lipoglycopeptide Antibiotic Deposited 2011-05-13 | Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 2 Protein heterocomplex Heteromer;Protein × 2 PDB declaration: dimeric |
Chain B
76–324(249 aa)
Fragment:Periplasmic domain, UNP residues 76-323
|
Not recorded | 02U 14-methylhexadec-9-enoic acid × 1 RAM alpha-L-rhamnopyranose × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 7.4;293 K;22% PEG 4000, 0.2M KCl, 0.025M n-dodecyl beta-D-maltoside (DDM), pH 7.4, VAPOR DIFFUSION, SITTING DROP, temperature 293K
|
Resolution 2.44 Å R-free 0.265 |
| 3S04 Crystal structure of Escherichia coli type I signal peptidase in complex with an Arylomycin Lipoglycopeptide Antibiotic Deposited 2011-05-13 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 3 Protein heterocomplex Heteromer;Protein × 4 PDB declaration: tetrameric |
Chain A
76–324(249 aa)
Fragment:Periplasmic domain, UNP residues 76-323
Chain B
76–324(249 aa)
Fragment:Periplasmic domain, UNP residues 76-323
|
Not recorded | 02U 14-methylhexadec-9-enoic acid × 2 RAM alpha-L-rhamnopyranose × 2 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 7.4;293 K;22% PEG 4000, 0.2M KCl, 0.025M n-dodecyl beta-D-maltoside (DDM), pH 7.4, VAPOR DIFFUSION, SITTING DROP, temperature 293K
|
Resolution 2.44 Å R-free 0.265 |
| 9NLO Escherichia coli Signal Peptidase I Delta 2-76 P84A in complex with lipopeptide inhibitor Deposited 2025-03-03 | 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 A
77–324(248 aa)
|
Mutation:P84A | EDO 1,2-ETHANEDIOL × 1 M12 10-METHYLUNDECANOIC ACID × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 4.6;294.15 K;25%v/v PEG 4000, 0.05M NH4OAC, 0.1M NaOAc pH 4.6, 0.033M L-proline
|
Resolution 2.32 Å R-free 0.234 |
| 9NLO Escherichia coli Signal Peptidase I Delta 2-76 P84A in complex with lipopeptide inhibitor Deposited 2025-03-03 | Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics | Assembly 2 Protein heterocomplex Heteromer;Protein × 2 PDB declaration: dimeric |
Chain B
77–324(248 aa)
|
Mutation:P84A | EDO 1,2-ETHANEDIOL × 1 M12 10-METHYLUNDECANOIC ACID × 1 |
X-RAY DIFFRACTION
X-ray crystallization conditions
VAPOR DIFFUSION, SITTING DROP;pH 4.6;294.15 K;25%v/v PEG 4000, 0.05M NH4OAC, 0.1M NaOAc pH 4.6, 0.033M L-proline
|
Resolution 2.32 Å R-free 0.234 |
6 other PDB entries and 17 assemblies. Open the comparison page and filter oligomeric states
View Construct and Data Evidence
| UniProt name | LEP_ECOLI |
| Isoform | — |
| PDB entities | 1 |
| Chains and sequence ranges | Author chain A; PDBConstruct 1–247; UniProt 78–324 Author chain B; PDBConstruct 1–247; UniProt 78–324 |