aminopeptidase catalyzes the cleavage of amino acids from the amino terminus of protein or peptide substrates; similar to Escherichia coli aminopeptidase FrvX
M42 Peptidase, endoglucanases; Peptidase M42 family, Frv (Frv Operon Protein; Endo-1 4-Beta-Glucanase; Cellulase Protein; Endoglucanase; Endo-1 4-Beta-Glucanase Homolog; Glucanase; EC. 3.2.1.4) subfamily. Frv is a co-catalytic metallopeptidase, found in archaea and bacteria, including Pyrococcus horikoshii tetrahedral shaped phTET1 (DAPPh1; FrvX; PhDAP aminopeptidase; PhTET aminopeptidase; deblocking aminopeptidase), phTET2 (DAPPh2) and phTET3 (DAPPh3), Haloarcula marismortui TET (HmTET) as well as Bacillus subtilis YsdC. All of these exhibit aminopeptidase and deblocking activities. The HmTET is a broad substrate aminopeptidase capable of degrading large peptides. PhTET2, which shares 24% identity with HmTET, is a cobalt-activated peptidase and possibly a deblocking aminopeptidase, assembled as a 12-subunit tetrahedral dodecamer, while PhTET1 can be alternatively assembled as a tetrahedral dodecamer or as an octahedral tetracosameric structure. The active site in such a self-compartmentalized complex is located on the inside such that substrate sizes are limited, indicating function as possible peptide scavengers. PhTET2 cleaves polypeptides by a nonprocessive mechanism, preferring N-terminal hydrophobic or uncharged polar amino acids. Streptococcus pneumoniae PepA (SpPepA) also forms dodecamer with tetrahedral architecture, and exhibits selective substrate specificity to acidic amino acids with the preference to glutamic acid, with the substrate binding S1 pocket containing an Arg allows electrostatic interactions with the N-terminal acidic residue in the substrate. The YsdC gene is conserved in a number of thermophiles, archaea and pathogenic bacterial species; the closest structural homolog is Thermotoga maritima FrwX (34% identity), which is annotated as either a cellulase or an endoglucanase, and is possibly involved in polysaccharide biosynthesis or degradation.
Pssm-ID: 349906 [Multi-domain] Cd Length: 337 Bit Score: 457.79 E-value: 1.73e-162
M42 glutamyl aminopeptidase; These peptidases are found in Archaea and Bacteria. The example ...
43-333
8.19e-131
M42 glutamyl aminopeptidase; These peptidases are found in Archaea and Bacteria. The example in Lactococcus lactis, PepA, aids growth on milk. Pyrococcus horikoshii contain a thermostable de-blocking aminopeptidase member of this family used commercially for N-terminal protein sequencing.
Pssm-ID: 428431 [Multi-domain] Cd Length: 292 Bit Score: 375.76 E-value: 8.19e-131
glutamyl aminopeptidase; This model represents the M42.001 clade within MEROPS family M42. M42 ...
6-347
2.05e-65
glutamyl aminopeptidase; This model represents the M42.001 clade within MEROPS family M42. M42 includes glutamyl aminopeptidase as in the present model, deblocking aminopeptidases as from Pyrococcus horikoshii and related species, and endo-1,4-beta-glucanase (cellulase M) as from Clostridium thermocellum. The current family includes [Protein fate, Degradation of proteins, peptides, and glycopeptides]
Pssm-ID: 132151 Cd Length: 350 Bit Score: 210.82 E-value: 2.05e-65
M42 Peptidase, endoglucanases; Peptidase M42 family, Frv (Frv Operon Protein; Endo-1 4-Beta-Glucanase; Cellulase Protein; Endoglucanase; Endo-1 4-Beta-Glucanase Homolog; Glucanase; EC. 3.2.1.4) subfamily. Frv is a co-catalytic metallopeptidase, found in archaea and bacteria, including Pyrococcus horikoshii tetrahedral shaped phTET1 (DAPPh1; FrvX; PhDAP aminopeptidase; PhTET aminopeptidase; deblocking aminopeptidase), phTET2 (DAPPh2) and phTET3 (DAPPh3), Haloarcula marismortui TET (HmTET) as well as Bacillus subtilis YsdC. All of these exhibit aminopeptidase and deblocking activities. The HmTET is a broad substrate aminopeptidase capable of degrading large peptides. PhTET2, which shares 24% identity with HmTET, is a cobalt-activated peptidase and possibly a deblocking aminopeptidase, assembled as a 12-subunit tetrahedral dodecamer, while PhTET1 can be alternatively assembled as a tetrahedral dodecamer or as an octahedral tetracosameric structure. The active site in such a self-compartmentalized complex is located on the inside such that substrate sizes are limited, indicating function as possible peptide scavengers. PhTET2 cleaves polypeptides by a nonprocessive mechanism, preferring N-terminal hydrophobic or uncharged polar amino acids. Streptococcus pneumoniae PepA (SpPepA) also forms dodecamer with tetrahedral architecture, and exhibits selective substrate specificity to acidic amino acids with the preference to glutamic acid, with the substrate binding S1 pocket containing an Arg allows electrostatic interactions with the N-terminal acidic residue in the substrate. The YsdC gene is conserved in a number of thermophiles, archaea and pathogenic bacterial species; the closest structural homolog is Thermotoga maritima FrwX (34% identity), which is annotated as either a cellulase or an endoglucanase, and is possibly involved in polysaccharide biosynthesis or degradation.
Pssm-ID: 349906 [Multi-domain] Cd Length: 337 Bit Score: 457.79 E-value: 1.73e-162
M42 glutamyl aminopeptidase; These peptidases are found in Archaea and Bacteria. The example ...
43-333
8.19e-131
M42 glutamyl aminopeptidase; These peptidases are found in Archaea and Bacteria. The example in Lactococcus lactis, PepA, aids growth on milk. Pyrococcus horikoshii contain a thermostable de-blocking aminopeptidase member of this family used commercially for N-terminal protein sequencing.
Pssm-ID: 428431 [Multi-domain] Cd Length: 292 Bit Score: 375.76 E-value: 8.19e-131
M42 Peptidases, also known as glutamyl aminopeptidase family; Peptidase M42 family proteins, ...
4-334
3.76e-84
M42 Peptidases, also known as glutamyl aminopeptidase family; Peptidase M42 family proteins, also known as glutamyl aminopeptidases (GAP), are co-catalytic metallopeptidases, found in archaea and bacteria. They typically bind two zinc or cobalt atoms and include cellulase and endo-1,4-beta-glucanase (endoglucanase). Some of the enzymes exhibit typical aminopeptidase specificity, whereas others are also capable of N-terminal deblocking activity, i.e. hydrolyzing acylated N-terminal residues. GAP removes glutamyl residues from the N-terminus of peptide substrates, but is also effective against aspartyl and, to a lesser extent, seryl residues. Lactococcus lactis glutamyl aminopeptidase (PepA; aminopeptidase A) has high thermal stability and aids growth of the organism in milk. Pyrococcus horikoshii contain a thermostable de-blocking aminopeptidase member of this family, used commercially for N-terminal protein sequencing.
Pssm-ID: 193517 [Multi-domain] Cd Length: 332 Bit Score: 258.16 E-value: 3.76e-84
glutamyl aminopeptidase; This model represents the M42.001 clade within MEROPS family M42. M42 ...
6-347
2.05e-65
glutamyl aminopeptidase; This model represents the M42.001 clade within MEROPS family M42. M42 includes glutamyl aminopeptidase as in the present model, deblocking aminopeptidases as from Pyrococcus horikoshii and related species, and endo-1,4-beta-glucanase (cellulase M) as from Clostridium thermocellum. The current family includes [Protein fate, Degradation of proteins, peptides, and glycopeptides]
Pssm-ID: 132151 Cd Length: 350 Bit Score: 210.82 E-value: 2.05e-65
M42 Peptidase, endoglucanase-like subfamily; Peptidase M42 family, glucanase (endo-1,4-beta-glucanase or endoglucanase)-like subfamily. Proteins in this subfamily are co-catalytic metallopeptidases, found in archaea and bacteria. They show similarity to cellulase and endo-1,4-beta-glucanase (endoglucanase) which typically bind two zinc or cobalt atoms. Some of the enzymes exhibit typical aminopeptidase specificity, whereas others are also capable of N-terminal deblocking activity, i.e. hydrolyzing acylated N-terminal residues. Many of these enzymes are assembled either as tetrahedral dodecamers or as octahedral tetracosameric structures, with the active site located on the inside such that substrate sizes are limited, indicating function as possible peptide scavengers.
Pssm-ID: 349907 [Multi-domain] Cd Length: 337 Bit Score: 106.98 E-value: 2.58e-26
M20 Peptidase acetylornithine deacetylase/acetyl-lysine deacetylase; Peptidase M20 family, acetylornithine deacetylase (ArgE)/acetyl-lysine deacetylase (LysK) subfamily. Proteins in this subfamily are mainly archaeal with related bacterial species and are deacetylases with specificity for both N-acetyl-ornithine and N-acetyl-lysine found within a lysine biosynthesis operon. ArgE catalyzes the conversion of N-acetylornithine to ornithine, while LysK, a homolog of ArgE, has deacetylating activities for both N-acetyllysine and N-acetylornithine at almost equal efficiency. These results suggest that LysK which may share an ancestor with ArgE functions not only for lysine biosynthesis, but also for arginine biosynthesis in species such as Thermus thermophilus. The substrate specificity of ArgE is quite broad in that several alpha-N-acyl-L-amino acids can be hydrolyzed, including alpha-N-acetylmethionine and alpha-N-formylmethionine. ArgE shares significant sequence homology and biochemical features, and possibly a common origin, with glutamate carboxypeptidase (CPG2) and succinyl-diaminopimelate desuccinylase (DapE), and aminoacylase I (ACY1), having all metal ligand binding residues conserved.
Pssm-ID: 349904 [Multi-domain] Cd Length: 343 Bit Score: 44.26 E-value: 6.30e-05
Peptidase M20 acetylornithine deacetylase/succinyl-diaminopimelate desuccinylase (ArgE/DapE)-like; Peptidase M20 acetylornithine deacetylase/succinyl-diaminopimelate desuccinylase (ArgE/DapE) like family of enzymes catalyze analogous reactions and share a common activator, the metal ion (usually Co2+ or Zn2+). ArgE catalyzes a broad range of substrates, including N-acetylornithine, alpha-N-acetylmethionine and alpha-N-formylmethionine, while DapE catalyzes the hydrolysis of N-succinyl-L,L-diaminopimelate (L,L-SDAP) to L,L-diaminopimelate and succinate. Proteins in this family are mostly bacterial and have been inferred by homology as being related to both ArgE and DapE. This family also includes N-acetyl-L-citrulline deacetylase (ACDase; acetylcitrulline deacetylase), a unique, novel enzyme found in Xanthomonas campestris, a plant pathogen, in which N-acetyl-L-ornithine is the substrate for transcarbamoylation reaction, and the product is N-acetyl-L-citrulline. Thus, in the arginine biosynthesis pathway, ACDase subsequently catalyzes the hydrolysis of N-acetyl-L-citrulline to acetate and L-citrulline.
Pssm-ID: 349944 [Multi-domain] Cd Length: 361 Bit Score: 42.29 E-value: 3.39e-04
Acetylornithine deacetylase/Succinyl-diaminopimelate desuccinylase or related deacylase [Amino ...
3-63
2.12e-03
Acetylornithine deacetylase/Succinyl-diaminopimelate desuccinylase or related deacylase [Amino acid transport and metabolism]; Acetylornithine deacetylase/Succinyl-diaminopimelate desuccinylase or related deacylase is part of the Pathway/BioSystem: Arginine biosynthesis
Pssm-ID: 440389 [Multi-domain] Cd Length: 388 Bit Score: 39.87 E-value: 2.12e-03
M20 Peptidase proteobacterial DapE encoded N-succinyl-L,L-diaminopimelic acid desuccinylase; Peptidase M20 family, proteobacterial DapE encoded N-succinyl-L,L-diaminopimelic acid desuccinylase (DapE; aspartyl dipeptidase; succinyl-diaminopimelate desuccinylase) subfamily. DapE catalyzes the hydrolysis of N-succinyl-L,L-diaminopimelate (L,L-SDAP) to L,L-diaminopimelate and succinate. It has been shown that DapE is essential for cell growth and proliferation. DapEs have been purified from Escherichia coli and Haemophilus influenzae, while the genes that encode for DapEs have been sequenced from several bacterial sources such as Corynebacterium glutamicum, Helicobacter pylori, Neisseria meningitidis and Mycobacterium tuberculosis. DapE is a small, dimeric enzyme that requires two zinc atoms per molecule for full enzymatic activity. All of the amino acids that function as metal binding ligands are strictly conserved in DapE.
Pssm-ID: 349886 [Multi-domain] Cd Length: 366 Bit Score: 39.41 E-value: 2.74e-03
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.
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