translation initiation factor eIF-2B alpha/beta/delta subunit family protein similar to methylthioribose-1-phosphate isomerase that catalyzes the interconversion of methylthioribose-1-phosphate (MTR-1-P) into methylthioribulose-1-phosphate (MTRu-1-P)
S-methyl-5-thioribose-1-phosphate isomerase; The delineation of this family was based in part ...
4-299
8.42e-138
S-methyl-5-thioribose-1-phosphate isomerase; The delineation of this family was based in part on a discussion and neighbor-joining phylogenetic study, by Kyrpides and Woese, of archaeal and other proteins homologous to the alpha, beta, and delta subunits of eukaryotic initiation factor 2B (eIF-2B), a five-subunit molecule that catalyzes GTP recycling for eIF-2. This clade is now recognized to include the methionine salvage pathway enzyme MtnA. [Amino acid biosynthesis, Aspartate family]
Pssm-ID: 273112 [Multi-domain] Cd Length: 335 Bit Score: 393.54 E-value: 8.42e-138
5-methylthioribose/5-deoxyribulose 1-phosphate isomerase (methionine salvage pathway), a ...
1-303
3.16e-113
5-methylthioribose/5-deoxyribulose 1-phosphate isomerase (methionine salvage pathway), a paralog of eIF-2B alpha subunit [Amino acid transport and metabolism];
Pssm-ID: 439952 Cd Length: 343 Bit Score: 331.23 E-value: 3.16e-113
Initiation factor 2 subunit family; This family includes initiation factor 2B alpha, beta and ...
44-299
1.75e-68
Initiation factor 2 subunit family; This family includes initiation factor 2B alpha, beta and delta subunits from eukaryotes, initiation factor 2B subunits 1 and 2 from archaebacteria and some proteins of unknown function from prokaryotes. Initiation factor 2 binds to Met-tRNA, GTP and the small ribosomal subunit. Members of this family have also been characterized as 5-methylthioribose- 1-phosphate isomerases, an enzyme of the methionine salvage pathway. The crystal structure of Ypr118w, a non-essential, low-copy number gene product from Saccharomyces cerevisiae, reveals a dimeric protein with two domains and a putative active site cleft.
Pssm-ID: 395798 [Multi-domain] Cd Length: 281 Bit Score: 215.24 E-value: 1.75e-68
S-methyl-5-thioribose-1-phosphate isomerase; The delineation of this family was based in part ...
4-299
8.42e-138
S-methyl-5-thioribose-1-phosphate isomerase; The delineation of this family was based in part on a discussion and neighbor-joining phylogenetic study, by Kyrpides and Woese, of archaeal and other proteins homologous to the alpha, beta, and delta subunits of eukaryotic initiation factor 2B (eIF-2B), a five-subunit molecule that catalyzes GTP recycling for eIF-2. This clade is now recognized to include the methionine salvage pathway enzyme MtnA. [Amino acid biosynthesis, Aspartate family]
Pssm-ID: 273112 [Multi-domain] Cd Length: 335 Bit Score: 393.54 E-value: 8.42e-138
5-methylthioribose/5-deoxyribulose 1-phosphate isomerase (methionine salvage pathway), a ...
1-303
3.16e-113
5-methylthioribose/5-deoxyribulose 1-phosphate isomerase (methionine salvage pathway), a paralog of eIF-2B alpha subunit [Amino acid transport and metabolism];
Pssm-ID: 439952 Cd Length: 343 Bit Score: 331.23 E-value: 3.16e-113
eIF-2B alpha/beta/delta-related uncharacterized proteins; This model, eIF-2B_rel, describes ...
33-299
1.20e-83
eIF-2B alpha/beta/delta-related uncharacterized proteins; This model, eIF-2B_rel, describes half of a superfamily, where the other half consists of eukaryotic translation initiation factor 2B (eIF-2B) subunits alpha, beta, and delta. It is unclear whether the eIF-2B_rel set is monophyletic, or whether they are all more closely related to each other than to any eIF-2B subunit because the eIF-2B clade is highly derived. Members of this branch of the family are all uncharacterized with respect to function and are found in the Archaea, Bacteria, and Eukarya, although a number are described as putative translation intiation factor components. Proteins found by eIF-2B_rel include at least three clades, including a set of uncharacterized eukaryotic proteins, a set found in some but not all Archaea, and a set universal so far among the Archaea and closely related to several uncharacterized bacterial proteins. [Unknown function, General]
Pssm-ID: 273119 [Multi-domain] Cd Length: 303 Bit Score: 254.67 E-value: 1.20e-83
Initiation factor 2 subunit family; This family includes initiation factor 2B alpha, beta and ...
44-299
1.75e-68
Initiation factor 2 subunit family; This family includes initiation factor 2B alpha, beta and delta subunits from eukaryotes, initiation factor 2B subunits 1 and 2 from archaebacteria and some proteins of unknown function from prokaryotes. Initiation factor 2 binds to Met-tRNA, GTP and the small ribosomal subunit. Members of this family have also been characterized as 5-methylthioribose- 1-phosphate isomerases, an enzyme of the methionine salvage pathway. The crystal structure of Ypr118w, a non-essential, low-copy number gene product from Saccharomyces cerevisiae, reveals a dimeric protein with two domains and a putative active site cleft.
Pssm-ID: 395798 [Multi-domain] Cd Length: 281 Bit Score: 215.24 E-value: 1.75e-68
Translation initiation factor 2B subunit, eIF-2B alpha/beta/delta family [Translation, ...
38-304
2.02e-44
Translation initiation factor 2B subunit, eIF-2B alpha/beta/delta family [Translation, ribosomal structure and biogenesis]; Translation initiation factor 2B subunit, eIF-2B alpha/beta/delta family is part of the Pathway/BioSystem: Translation factors
Pssm-ID: 440797 [Multi-domain] Cd Length: 304 Bit Score: 153.85 E-value: 2.02e-44
ribose-1,5-bisphosphate isomerase, e2b2 family; The delineation of this family was based ...
33-300
1.14e-31
ribose-1,5-bisphosphate isomerase, e2b2 family; The delineation of this family was based originally, in part, on a discussion and neighbor-joining phylogenetic study by Kyrpides and Woese of archaeal and other proteins homologous to the alpha, beta, and delta subunits of eukaryotic initiation factor 2B (eIF-2B), a five-subunit molecule that catalyzes GTP recycling for eIF-2. Recently, Sato, et al. assigned the function ribulose-1,5 bisphosphate isomerase. [Energy metabolism, Other]
Pssm-ID: 188057 Cd Length: 301 Bit Score: 120.21 E-value: 1.14e-31
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.
Click on the triangle to view details about the feature, including a multiple sequence alignment
of your query sequence and the protein sequences used to curate the domain model,
where hash marks (#) above the aligned sequences show the location of the conserved feature residues.
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.
Click here to see more details.
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
(labeled illustration) or all hits
(labeled illustration).
Domains are color coded according to superfamilies
to which they have been assigned. Hits with scores that pass a domain-specific threshold
(specific hits) are drawn in bright colors.
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).
Modify your query to search against a different database and/or use advanced search options
