class I SAM-dependent methyltransferase catalyzes the methylation of one or more specific substrates using S-adenosyl-L-methionine (SAM or AdoMet) as the methyl donor
S-adenosylmethionine-dependent methyltransferases (SAM or AdoMet-MTase), class I; ...
1-159
8.37e-88
S-adenosylmethionine-dependent methyltransferases (SAM or AdoMet-MTase), class I; AdoMet-MTases are enzymes that use S-adenosyl-L-methionine (SAM or AdoMet) as a substrate for methyltransfer, creating the product S-adenosyl-L-homocysteine (AdoHcy). There are at least five structurally distinct families of AdoMet-MTases, class I being the largest and most diverse. Within this class enzymes can be classified by different substrate specificities (small molecules, lipids, nucleic acids, etc.) and different target atoms for methylation (nitrogen, oxygen, carbon, sulfur, etc.).
The actual alignment was detected with superfamily member PTZ00338:
Pssm-ID: 473071 [Multi-domain] Cd Length: 294 Bit Score: 258.39 E-value: 8.37e-88
ribosomal RNA small subunit methyltransferase A; In both E. coli and Saccharomyces cerevisiae, ...
1-152
5.88e-37
ribosomal RNA small subunit methyltransferase A; In both E. coli and Saccharomyces cerevisiae, this protein is responsible for the dimethylation of two adjacent adenosine residues in a conserved hairpin of 16S rRNA in bacteria, 18S rRNA in eukaryotes. This adjacent dimethylation is the only rRNA modification shared by bacteria and eukaryotes. A single member of this family is present in each of the first 20 completed microbial genomes. This protein is essential in yeast, but not in E. coli, where its deletion leads to resistance to the antibiotic kasugamycin. Alternate name: S-adenosylmethionine--6-N',N'-adenosyl (rRNA) dimethyltransferase [Protein synthesis, tRNA and rRNA base modification]
Pssm-ID: 273252 [Multi-domain] Cd Length: 254 Bit Score: 127.35 E-value: 5.88e-37
16S rRNA A1518 and A1519 N6-dimethyltransferase RsmA/KsgA/DIM1 (may also have DNA glycosylase ...
1-148
7.01e-35
16S rRNA A1518 and A1519 N6-dimethyltransferase RsmA/KsgA/DIM1 (may also have DNA glycosylase/AP lyase activity) [Translation, ribosomal structure and biogenesis]; 16S rRNA A1518 and A1519 N6-dimethyltransferase RsmA/KsgA/DIM1 (may also have DNA glycosylase/AP lyase activity) is part of the Pathway/BioSystem: 16S rRNA modification
Pssm-ID: 439801 [Multi-domain] Cd Length: 270 Bit Score: 122.54 E-value: 7.01e-35
ribosomal RNA small subunit methyltransferase A; In both E. coli and Saccharomyces cerevisiae, ...
1-152
5.88e-37
ribosomal RNA small subunit methyltransferase A; In both E. coli and Saccharomyces cerevisiae, this protein is responsible for the dimethylation of two adjacent adenosine residues in a conserved hairpin of 16S rRNA in bacteria, 18S rRNA in eukaryotes. This adjacent dimethylation is the only rRNA modification shared by bacteria and eukaryotes. A single member of this family is present in each of the first 20 completed microbial genomes. This protein is essential in yeast, but not in E. coli, where its deletion leads to resistance to the antibiotic kasugamycin. Alternate name: S-adenosylmethionine--6-N',N'-adenosyl (rRNA) dimethyltransferase [Protein synthesis, tRNA and rRNA base modification]
Pssm-ID: 273252 [Multi-domain] Cd Length: 254 Bit Score: 127.35 E-value: 5.88e-37
16S rRNA A1518 and A1519 N6-dimethyltransferase RsmA/KsgA/DIM1 (may also have DNA glycosylase ...
1-148
7.01e-35
16S rRNA A1518 and A1519 N6-dimethyltransferase RsmA/KsgA/DIM1 (may also have DNA glycosylase/AP lyase activity) [Translation, ribosomal structure and biogenesis]; 16S rRNA A1518 and A1519 N6-dimethyltransferase RsmA/KsgA/DIM1 (may also have DNA glycosylase/AP lyase activity) is part of the Pathway/BioSystem: 16S rRNA modification
Pssm-ID: 439801 [Multi-domain] Cd Length: 270 Bit Score: 122.54 E-value: 7.01e-35
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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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)
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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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