C15 family peptidase contains a Cys-His-Glu/Asp catalytic triad, such as pyrrolidone-carboxylate peptidase, also called pyroglutamyl-peptidase I (PGP-I), that cleaves pyroglutamate (pGlu) from the N-terminal end of specialized proteins; the N-terminal pGlu protects these proteins from proteolysis by other proteases until the pGlu is removed by PGP
Pyroglutamyl peptidase (PGP) type I, also known as pyrrolidone carboxyl peptidase (pcp) type I: ...
8-152
1.58e-32
Pyroglutamyl peptidase (PGP) type I, also known as pyrrolidone carboxyl peptidase (pcp) type I: Enzymes responsible for cleaving pyroglutamate (pGlu) from the N-terminal end of specialized proteins. The N-terminal pGlu protects these proteins from proteolysis by other proteases until the pGlu is removed by a PGP. PGPs are cysteine proteases with a Cys-His-Glu/Asp catalytic triad. Type I PGPs are found in a wide variety of prokaryotes and eukaryotes. It is not clear whether the functional form is a monomer, a homodimer, or a homotetramer.
The actual alignment was detected with superfamily member cd00501:
Pssm-ID: 444776 Cd Length: 194 Bit Score: 115.44 E-value: 1.58e-32
Pyroglutamyl peptidase (PGP) type I, also known as pyrrolidone carboxyl peptidase (pcp) type I: ...
8-152
1.58e-32
Pyroglutamyl peptidase (PGP) type I, also known as pyrrolidone carboxyl peptidase (pcp) type I: Enzymes responsible for cleaving pyroglutamate (pGlu) from the N-terminal end of specialized proteins. The N-terminal pGlu protects these proteins from proteolysis by other proteases until the pGlu is removed by a PGP. PGPs are cysteine proteases with a Cys-His-Glu/Asp catalytic triad. Type I PGPs are found in a wide variety of prokaryotes and eukaryotes. It is not clear whether the functional form is a monomer, a homodimer, or a homotetramer.
Pssm-ID: 238279 Cd Length: 194 Bit Score: 115.44 E-value: 1.58e-32
pyroglutamyl-peptidase I; Alternate names include pyroglutamate aminopeptidase, ...
15-148
9.48e-10
pyroglutamyl-peptidase I; Alternate names include pyroglutamate aminopeptidase, pyrrolidone-carboxylate peptidase, and 5-oxoprolyl-peptidase. It removes pyroglutamate (pyrrolidone-carboxylate, a modified glutamine) that can otherwise block hydrolysis of a polypeptide at the amino end, and so can be extremely useful in the biochemical studies of proteins. The biological role in the various species in which it is found is not fully understood. The enzyme appears to be a homodimer. It does not closely resemble any other peptidases. [Protein fate, Degradation of proteins, peptides, and glycopeptides]
Pssm-ID: 129595 Cd Length: 212 Bit Score: 56.01 E-value: 9.48e-10
Pyroglutamyl peptidase (PGP) type I, also known as pyrrolidone carboxyl peptidase (pcp) type I: ...
8-152
1.58e-32
Pyroglutamyl peptidase (PGP) type I, also known as pyrrolidone carboxyl peptidase (pcp) type I: Enzymes responsible for cleaving pyroglutamate (pGlu) from the N-terminal end of specialized proteins. The N-terminal pGlu protects these proteins from proteolysis by other proteases until the pGlu is removed by a PGP. PGPs are cysteine proteases with a Cys-His-Glu/Asp catalytic triad. Type I PGPs are found in a wide variety of prokaryotes and eukaryotes. It is not clear whether the functional form is a monomer, a homodimer, or a homotetramer.
Pssm-ID: 238279 Cd Length: 194 Bit Score: 115.44 E-value: 1.58e-32
pyroglutamyl-peptidase I; Alternate names include pyroglutamate aminopeptidase, ...
15-148
9.48e-10
pyroglutamyl-peptidase I; Alternate names include pyroglutamate aminopeptidase, pyrrolidone-carboxylate peptidase, and 5-oxoprolyl-peptidase. It removes pyroglutamate (pyrrolidone-carboxylate, a modified glutamine) that can otherwise block hydrolysis of a polypeptide at the amino end, and so can be extremely useful in the biochemical studies of proteins. The biological role in the various species in which it is found is not fully understood. The enzyme appears to be a homodimer. It does not closely resemble any other peptidases. [Protein fate, Degradation of proteins, peptides, and glycopeptides]
Pssm-ID: 129595 Cd Length: 212 Bit Score: 56.01 E-value: 9.48e-10
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
of the residues that compose this conserved feature have been mapped to the query sequence.
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of your query sequence and the protein sequences used to curate the domain model,
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The thumbnail image, if present, provides an approximate view of the feature's location in 3 dimensions.
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Functional characterization of the conserved domain architecture found on the query.
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This image shows a graphical summary of conserved domains identified on the query sequence.
The Show Concise/Full Display button at the top of the page can be used to select the desired level of detail: only top scoring hits
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Domains are color coded according to superfamilies
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if a domain or superfamily has been annotated with functional sites (conserved features),
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click on the bars or triangles to view your query sequence embedded in a multiple sequence alignment of the proteins used to develop the corresponding domain model.
The table lists conserved domains identified on the query sequence. Click on the plus sign (+) on the left to display full descriptions, alignments, and scores.
Click on the domain model's accession number to view the multiple sequence alignment of the proteins used to develop the corresponding domain model.
To view your query sequence embedded in that multiple sequence alignment, click on the colored bars in the Graphical Summary portion of the search results page,
or click on the triangles, if present, that represent functional sites (conserved features)
mapped to the query sequence.
Concise Display shows only the best scoring domain model, in each hit category listed below except non-specific hits, for each region on the query sequence.
(labeled illustration) Standard Display shows only the best scoring domain model from each source, in each hit category listed below for each region on the query sequence.
(labeled illustration) Full Display shows all domain models, in each hit category below, that meet or exceed the RPS-BLAST threshold for statistical significance.
(labeled illustration) Four types of hits can be shown, as available,
for each region on the query sequence:
specific hits meet or exceed a domain-specific e-value threshold
(illustrated example)
and represent a very high confidence that the query sequence belongs to the same protein family as the sequences use to create the domain model
non-specific hits
meet or exceed the RPS-BLAST threshold for statistical significance (default E-value cutoff of 0.01, or an E-value selected by user via the
advanced search options)
the domain superfamily to which the specific and non-specific hits belong
multi-domain models that were computationally detected and are likely to contain multiple single domains
Retrieve proteins that contain one or more of the domains present in the query sequence, using the Conserved Domain Architecture Retrieval Tool
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