cobalamin-independent methionine synthase II family protein similar to the C-terminal domain of 5-methyltetrahydropteroyltriglutamate--homocysteine S-methyltransferase that catalyzes the direct transfer of a methyl group from methyltetrahydrofolate to homocysteine to form methionine
CIMS - Cobalamine-independent methonine synthase, or MetE, C-terminal domain_like. Many ...
9-359
5.65e-135
CIMS - Cobalamine-independent methonine synthase, or MetE, C-terminal domain_like. Many members have been characterized as 5-methyltetrahydropteroyltriglutamate-homocysteine methyltransferases, EC:2.1.1.14, mostly from bacteria and plants. This enzyme catalyses the last step in the production of methionine by transferring a methyl group from 5-methyltetrahydrofolate to L-homocysteine without using an intermediate methyl carrier. The active enzyme has a dual (beta-alpha)8-barrel structure, and this model covers the C-terminal barrel, and a few single-barrel sequences most similar to the C-terminal barrel. It is assumed that the homologous N-terminal barrel has evolved from the C-terminus via gene duplication and has subsequently lost binding sites, and it seems as if the two barrels forming the active enzyme may sometimes reside on different polypeptides. The C-terminal domain incorporates the Zinc ion, which binds and activates homocysteine. Sidechains from both barrels contribute to the binding of the folate substrate.
Pssm-ID: 239427 [Multi-domain] Cd Length: 332 Bit Score: 388.12 E-value: 5.65e-135
Methionine synthase II (cobalamin-independent) [Amino acid transport and metabolism]; ...
8-367
1.44e-118
Methionine synthase II (cobalamin-independent) [Amino acid transport and metabolism]; Methionine synthase II (cobalamin-independent) is part of the Pathway/BioSystem: Methionine biosynthesis
Pssm-ID: 440385 [Multi-domain] Cd Length: 325 Bit Score: 345.97 E-value: 1.44e-118
CIMS - Cobalamine-independent methonine synthase, or MetE, C-terminal domain_like. Many ...
9-359
5.65e-135
CIMS - Cobalamine-independent methonine synthase, or MetE, C-terminal domain_like. Many members have been characterized as 5-methyltetrahydropteroyltriglutamate-homocysteine methyltransferases, EC:2.1.1.14, mostly from bacteria and plants. This enzyme catalyses the last step in the production of methionine by transferring a methyl group from 5-methyltetrahydrofolate to L-homocysteine without using an intermediate methyl carrier. The active enzyme has a dual (beta-alpha)8-barrel structure, and this model covers the C-terminal barrel, and a few single-barrel sequences most similar to the C-terminal barrel. It is assumed that the homologous N-terminal barrel has evolved from the C-terminus via gene duplication and has subsequently lost binding sites, and it seems as if the two barrels forming the active enzyme may sometimes reside on different polypeptides. The C-terminal domain incorporates the Zinc ion, which binds and activates homocysteine. Sidechains from both barrels contribute to the binding of the folate substrate.
Pssm-ID: 239427 [Multi-domain] Cd Length: 332 Bit Score: 388.12 E-value: 5.65e-135
Methionine synthase II (cobalamin-independent) [Amino acid transport and metabolism]; ...
8-367
1.44e-118
Methionine synthase II (cobalamin-independent) [Amino acid transport and metabolism]; Methionine synthase II (cobalamin-independent) is part of the Pathway/BioSystem: Methionine biosynthesis
Pssm-ID: 440385 [Multi-domain] Cd Length: 325 Bit Score: 345.97 E-value: 1.44e-118
CIMS - Cobalamine-independent methonine synthase, or MetE. Many members have been ...
10-343
5.27e-06
CIMS - Cobalamine-independent methonine synthase, or MetE. Many members have been characterized as 5-methyltetrahydropteroyltriglutamate-homocysteine methyltransferases, EC:2.1.1.14, mostly from bacteria and plants. This enzyme catalyses the last step in the production of methionine by transferring a methyl group from 5-methyltetrahydrofolate to L-homocysteine without using an intermediate methyl carrier. The active enzyme has a dual (beta-alpha)8-barrel structure, and this model covers both the N-and C-terminal barrel, and some single-barrel sequences, mostly from Archaea. It is assumed that the homologous N-terminal barrel has evolved from the C-terminus via gene duplication and has subsequently lost binding sites, and it seems as if the two barrels forming the active enzyme may sometimes reside on different polypeptides. The C-terminal domain incorporates the Zinc ion, which binds and activates homocysteine. Side chains from both barrels contribute to the binding of the folate substrate.
Pssm-ID: 239426 [Multi-domain] Cd Length: 321 Bit Score: 47.81 E-value: 5.27e-06
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
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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
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