Penicillin amidase; Penicillin amidase or penicillin acylase EC:3.5.1.11 catalyzes the ...
70-904
0e+00
Penicillin amidase; Penicillin amidase or penicillin acylase EC:3.5.1.11 catalyzes the hydrolysis of benzylpenicillin to phenylacetic acid and 6-aminopenicillanic acid (6-APA) a key intermediate in the the synthesis of penicillins. Also in the family is cephalosporin acylase and aculeacin A acylase which are involved in the synthesis of related peptide antibiotics.
Pssm-ID: 460338 Cd Length: 670 Bit Score: 786.09 E-value: 0e+00
Penicillin G acylase (PGA) belongs to a family of beta-lactam acylases that includes ...
310-624
3.67e-119
Penicillin G acylase (PGA) belongs to a family of beta-lactam acylases that includes cephalosporin acylase (CA) and aculeacin A acylase. PGA and CA are crucial for the production of backbone chemicals like 6-aminopenicillanic acid and 7-aminocephalosporanic acid (7-ACA), which can be used to synthesize semi-synthetic penicillins and cephalosporins, respectively. While both PGA and CA have a conserved Ntn (N-terminal nucleophile) hydrolase fold and the structural similarity at their active sites is very high, their sequence similarity is low.
Pssm-ID: 239716 [Multi-domain] Cd Length: 312 Bit Score: 365.03 E-value: 3.67e-119
Penicillin amidase; Penicillin amidase or penicillin acylase EC:3.5.1.11 catalyzes the ...
70-904
0e+00
Penicillin amidase; Penicillin amidase or penicillin acylase EC:3.5.1.11 catalyzes the hydrolysis of benzylpenicillin to phenylacetic acid and 6-aminopenicillanic acid (6-APA) a key intermediate in the the synthesis of penicillins. Also in the family is cephalosporin acylase and aculeacin A acylase which are involved in the synthesis of related peptide antibiotics.
Pssm-ID: 460338 Cd Length: 670 Bit Score: 786.09 E-value: 0e+00
Penicillin G acylase (PGA) belongs to a family of beta-lactam acylases that includes ...
310-624
3.67e-119
Penicillin G acylase (PGA) belongs to a family of beta-lactam acylases that includes cephalosporin acylase (CA) and aculeacin A acylase. PGA and CA are crucial for the production of backbone chemicals like 6-aminopenicillanic acid and 7-aminocephalosporanic acid (7-ACA), which can be used to synthesize semi-synthetic penicillins and cephalosporins, respectively. While both PGA and CA have a conserved Ntn (N-terminal nucleophile) hydrolase fold and the structural similarity at their active sites is very high, their sequence similarity is low.
Pssm-ID: 239716 [Multi-domain] Cd Length: 312 Bit Score: 365.03 E-value: 3.67e-119
Cephalosporin acylase (CA) belongs to a family of beta-lactam acylases that includes ...
306-671
1.47e-64
Cephalosporin acylase (CA) belongs to a family of beta-lactam acylases that includes penicillin G acylase (PGA) and aculeacin A acylase. PGA and CA are crucial for the production of backbone chemicals like 6-aminopenicillanic acid and 7-aminocephalosporanic acid (7-ACA), which can be used to synthesize semi-synthetic penicillins and cephalosporins, respectively. While both PGA and CA have a conserved Ntn (N-terminal nucleophile) hydrolase fold and the structural similarity at their active sites is very high, their sequence similarity to other Ntn's is low.
Pssm-ID: 238911 Cd Length: 469 Bit Score: 224.82 E-value: 1.47e-64
Penicillin G acylase (PGA) is the key enzyme in the industrial production of beta-lactam ...
310-688
2.98e-52
Penicillin G acylase (PGA) is the key enzyme in the industrial production of beta-lactam antibiotics. PGA hydrolyzes the side chain of penicillin G and related beta-lactam antibiotics releasing 6-amino penicillanic acid (6-APA), a building block in the production of semisynthetic penicillins. PGA is widely distributed among microorganisms, including bacteria, yeast and filamentous fungi but it's in vivo role remains unclear.
Pssm-ID: 239717 Cd Length: 488 Bit Score: 190.75 E-value: 2.98e-52
The Ntn hydrolases (N-terminal nucleophile) are a diverse superfamily of of enzymes that are ...
310-445
7.96e-04
The Ntn hydrolases (N-terminal nucleophile) are a diverse superfamily of of enzymes that are activated autocatalytically via an N-terminally lcated nucleophilic amino acid. N-terminal nucleophile (NTN-) hydrolase superfamily, which contains a four-layered alpha, beta, beta, alpha core structure. This family of hydrolases includes penicillin acylase, the 20S proteasome alpha and beta subunits, and glutamate synthase. The mechanism of activation of these proteins is conserved, although they differ in their substrate specificities. All known members catalyze the hydrolysis of amide bonds in either proteins or small molecules, and each one of them is synthesized as a preprotein. For each, an autocatalytic endoproteolytic process generates a new N-terminal residue. This mature N-terminal residue is central to catalysis and acts as both a polarizing base and a nucleophile during the reaction. The N-terminal amino group acts as the proton acceptor and activates either the nucleophilic hydroxyl in a Ser or Thr residue or the nucleophilic thiol in a Cys residue. The position of the N-terminal nucleophile in the active site and the mechanism of catalysis are conserved in this family, despite considerable variation in the protein sequences.
Pssm-ID: 238884 [Multi-domain] Cd Length: 164 Bit Score: 41.23 E-value: 7.96e-04
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.
Click on the triangle for interactive 3D structure viewing options.
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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Others (non-specific hits) and
superfamily placeholders are drawn in pastel colors.
if a domain or superfamily has been annotated with functional sites (conserved features),
they are mapped to the query sequence and indicated through sets of triangles
with the same color and shade of the domain or superfamily that provides the annotation. Mouse over the colored bars or triangles to see descriptions of the domains and features.
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
(CDART).
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