DB code: S00408

RLCP classification 1.13.30000.39 : Hydrolysis
CATH domain 3.40.630.20 : Aminopeptidase Catalytic domain
E.C. 3.4.19.3
CSA 1aug
M-CSA 1aug
MACiE

CATH domain Related DB codes (homologues)

Uniprot Enzyme Name
UniprotKB Protein name Synonyms MEROPS Pfam RefSeq
O07883 Pyrrolidone-carboxylate peptidase
PGP-I
EC 3.4.19.3
5-oxoprolyl-peptidase
Pyroglutamyl-peptidase I
C15.001 (Cysteine)
PF01470 (Peptidase_C15)
[Graphical View]
O73944 Pyrrolidone-carboxylate peptidase
EC 3.4.19.3
5-oxoprolyl-peptidase
Pyroglutamyl-peptidase I
PGP-I
Pyrase
C15.001 (Cysteine)
PF01470 (Peptidase_C15)
[Graphical View]
NP_579028.1 (Protein)
NC_003413.1 (DNA/RNA sequence)
P46107 Pyrrolidone-carboxylate peptidase
EC 3.4.19.3
5-oxoprolyl-peptidase
Pyroglutamyl-peptidase I
PGP-I
Pyrase
C15.001 (Cysteine)
PF01470 (Peptidase_C15)
[Graphical View]

KEGG enzyme name
pyroglutamyl-peptidase I
5-oxoprolyl-peptidase
pyrase
pyroglutamate aminopeptidase
pyroglutamyl aminopeptidase
L-pyroglutamyl peptide hydrolase
pyrrolidone-carboxyl peptidase
pyrrolidone-carboxylate peptidase
pyrrolidonyl peptidase
L-pyrrolidonecarboxylate peptidase
pyroglutamidase
pyrrolidonecarboxylyl peptidase

UniprotKB: Accession Number Entry name Activity Subunit Subcellular location Cofactor
O07883 PCP_THELI Release of an N-terminal pyroglutamyl group from a polypeptide, the second amino acid generally not being Pro. Homotetramer. Cytoplasm.
O73944 PCP_PYRFU Release of an N-terminal pyroglutamyl group from a polypeptide, the second amino acid generally not being Pro. Homotetramer made of two disulfide-linked dimers. Cytoplasm.
P46107 PCP_BACAM Release of an N-terminal pyroglutamyl group from a polypeptide, the second amino acid generally not being Pro. Homotetramer. Cytoplasm.

KEGG Pathways
Map code Pathways E.C.

Compound table
Substrates Products Intermediates
KEGG-id C00017 C00012 C00001 C00017 C00012 I00153 I00154 I00155
E.C.
Compound Protein Peptide H2O Protein Peptide Peptidyl-Cys-tetrahedral-intermediate (with previous peptide) Acyl-enzyme(Peptidyl-Cys-acyl group) Peptidyl-Cys-tetrahedral-intermediate
Type peptide/protein peptide/protein H2O peptide/protein peptide/protein
ChEBI 15377
15377
PubChem 22247451
962
22247451
962
1a2zA Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1a2zB Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1a2zC Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1a2zD Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1iofA Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1iofB Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1iofC Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1iofD Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1ioiA Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1ioiB Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1ioiC Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1ioiD Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1augA Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1augB Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1augC Unbound Unbound Unbound Unbound Unbound Unbound Unbound
1augD Unbound Unbound Unbound Unbound Unbound Unbound Unbound

Reference for Active-site residues
resource references E.C.
Swiss-prot;P46107,PDB;1a2z

Active-site residues
PDB Catalytic residues Cofactor-binding residues Modified residues Main-chain involved in catalysis Comment
1a2zA GLU 80;ARG 90;CYS 143;HIS 167 CYS 143
1a2zB GLU 80;ARG 90;CYS 143;HIS 167 CYS 143
1a2zC GLU 80;ARG 90;CYS 143;HIS 167 CYS 143
1a2zD GLU 80;ARG 90;CYS 143;HIS 167 CYS 143
1iofA GLU 79;ARG 89;CYS 142;HIS 166 CYS 142
1iofB GLU 79;ARG 89;CYS 142;HIS 166 CYS 142
1iofC GLU 79;ARG 89;CYS 142;HIS 166 CYS 142
1iofD GLU 79;ARG 89;CYS 142;HIS 166 CYS 142
1ioiA GLU 79;ARG 89; ;HIS 166 mutant C142S
1ioiB GLU 79;ARG 89; ;HIS 166 mutant C142S
1ioiC GLU 79;ARG 89; ;HIS 166 mutant C142S
1ioiD GLU 79;ARG 89; ;HIS 166 mutant C142S
1augA GLU 81;ARG 91;CYS 144;HIS 168 CYS 144
1augB GLU 291;ARG 301;CYS 354;HIS 378 CYS 354
1augC GLU 501;ARG 511;CYS 564;HIS 588 CYS 564
1augD GLU 711;ARG 721;CYS 774;HIS 798 CYS 774

References for Catalytic Mechanism
References Sections No. of steps in catalysis
[1]
p.240
[2]
p.405
[3]
p.111-112

References
[1]
Resource
Comments X-ray crystallography (1.73 Angstroms)
Medline ID
PubMed ID 10368293
Journal Structure Fold Des
Year 1999
Volume 7
Pages 237-44
Authors Singleton M, Isupov M, Littlechild J
Title X-ray structure of pyrrolidone carboxyl peptidase from the hyperthermophilic archaeon Thermococcus litoralis.
Related PDB 1a2z
Related UniProtKB
[2]
Resource
Comments X-ray crystallography (1.6 Angstroms)
Medline ID 99216536
PubMed ID 10196127
Journal Structure Fold Des
Year 1999
Volume 7
Pages 399-411
Authors Odagaki Y, Hayashi A, Okada K, Hirotsu K, Kabashima T, Ito K, Yoshimoto T, Tsuru D, Sato M, Clardy J
Title The crystal structure of pyroglutamyl peptidase I from Bacillus amyloliquefaciens reveals a new structure for a cysteine protease.
Related PDB 1aug
Related UniProtKB P46107
[3]
Resource
Comments X-ray crystallography (wildtype;2.2/mutant;2.7 Angstroms)
Medline ID
PubMed ID 11432786
Journal J Biochem (Tokyo)
Year 2001
Volume 130
Pages 107-18
Authors Tanaka H, Chinami M, Mizushima T, Ogasahara K, Ota M, Tsukihara T, Yutani K
Title X-ray crystalline structures of pyrrolidone carboxyl peptidase from a hyperthermophile, Pyrococcus furiosus, and its cys-free mutant.
Related PDB 1iof 1ioi
Related UniProtKB
[4]
Resource
Comments X-ray crystallography, Site-directed mutagenesis
Medline ID
PubMed ID 11359794
Journal J Biol Chem
Year 2001
Volume 276
Pages 18557-62
Authors Ito K, Inoue T, Takahashi T, Huang HS, Esumi T, Hatakeyama S, Tanaka N, Nakamura KT, Yoshimoto T
Title The mechanism of aubstrate eecognition of pyroglutamyl-peptidase I from Bacillus amyloliquefaciens as determined by X-ray crystallography and site-directed mutagenesis.
Related PDB
Related UniProtKB

Comments
The papers [1],[2] & [3] reported on the catalytic triad Cys-His-Glu, suggesting that this enzyme belongs to a cysteine protease family. However, the mutation of the catalytic nucleophilic residue, Cys, into Ser, retained the catalytic activity [1].
According to the literature [2], the oxyanion hole seems to be composed of the mainchain amide of Cys144(PDB;1aug) and sidechain of Arg91.

Created Updated
2002-09-27 2012-10-22