cyclin box found in B-related factor 2 (BRF-2) and similar proteins; BRF-2, also called ...
66-162
7.72e-42
cyclin box found in B-related factor 2 (BRF-2) and similar proteins; BRF-2, also called transcription factor IIIB 50 kDa subunit (TFIIIB50), or BRFU, is a general activator of RNA polymerase (Pol) III transcription and is required for Pol III transcription of genes with promoter elements upstream of the initiation sites. It recruits Pol III to type III gene-external promoters, including the U6 spliceosomal RNA and selenocysteine tRNA genes. BRF-2 contains one cyclin box. The cyclin box fold is generally a protein binding domain, but binds DNA in BRF-2.
:
Pssm-ID: 410258 [Multi-domain] Cd Length: 97 Bit Score: 142.80 E-value: 7.72e-42
cyclin box found in B-related factor 2 (BRF-2) and similar proteins; BRF-2, also called ...
66-162
7.72e-42
cyclin box found in B-related factor 2 (BRF-2) and similar proteins; BRF-2, also called transcription factor IIIB 50 kDa subunit (TFIIIB50), or BRFU, is a general activator of RNA polymerase (Pol) III transcription and is required for Pol III transcription of genes with promoter elements upstream of the initiation sites. It recruits Pol III to type III gene-external promoters, including the U6 spliceosomal RNA and selenocysteine tRNA genes. BRF-2 contains one cyclin box. The cyclin box fold is generally a protein binding domain, but binds DNA in BRF-2.
Pssm-ID: 410258 [Multi-domain] Cd Length: 97 Bit Score: 142.80 E-value: 7.72e-42
TFIIB zinc-binding; The transcription factor TFIIB contains a zinc-binding motif near the ...
6-37
1.70e-06
TFIIB zinc-binding; The transcription factor TFIIB contains a zinc-binding motif near the N-terminus. This domain is involved in the interaction with RNA pol II and TFIIF and plays a crucial role in selecting the transcription initiation site. The domain adopts a zinc ribbon like structure.
Pssm-ID: 400527 [Multi-domain] Cd Length: 43 Bit Score: 44.61 E-value: 1.70e-06
cyclin box found in B-related factor 2 (BRF-2) and similar proteins; BRF-2, also called ...
66-162
7.72e-42
cyclin box found in B-related factor 2 (BRF-2) and similar proteins; BRF-2, also called transcription factor IIIB 50 kDa subunit (TFIIIB50), or BRFU, is a general activator of RNA polymerase (Pol) III transcription and is required for Pol III transcription of genes with promoter elements upstream of the initiation sites. It recruits Pol III to type III gene-external promoters, including the U6 spliceosomal RNA and selenocysteine tRNA genes. BRF-2 contains one cyclin box. The cyclin box fold is generally a protein binding domain, but binds DNA in BRF-2.
Pssm-ID: 410258 [Multi-domain] Cd Length: 97 Bit Score: 142.80 E-value: 7.72e-42
Cyclin box fold superfamily; The cyclin box is a protein binding domain that functions in ...
73-155
4.55e-07
Cyclin box fold superfamily; The cyclin box is a protein binding domain that functions in cell-cycle and transcriptional control. It is about 100 amino acids in length, composed of five helices, and is present in cyclins, transcription initiation factor IIB (TFIIB), and retinoblastoma tumour suppressor protein (Rb). Cyclins consist of 8 classes of cell cycle regulators that function as regulatory subunits of cyclin-dependent kinases (CDKs), which are serine/threonine kinases. The catalytic activities of CDKs are modulated not only by their interactions with cyclins but also by CDK inhibitors (CKIs). CDKs, cyclins and CKIs play key roles in transcription, epigenetic regulation, metabolism, stem cell self-renewal, neuronal functions, and spermatogenesis. TFIIB is a transcription factor that binds the TATA box. Members in this superfamily contain one or two copies of the cyclin box.
Pssm-ID: 410207 [Multi-domain] Cd Length: 82 Bit Score: 47.41 E-value: 4.55e-07
TFIIB zinc-binding; The transcription factor TFIIB contains a zinc-binding motif near the ...
6-37
1.70e-06
TFIIB zinc-binding; The transcription factor TFIIB contains a zinc-binding motif near the N-terminus. This domain is involved in the interaction with RNA pol II and TFIIF and plays a crucial role in selecting the transcription initiation site. The domain adopts a zinc ribbon like structure.
Pssm-ID: 400527 [Multi-domain] Cd Length: 43 Bit Score: 44.61 E-value: 1.70e-06
first cyclin box found in transcription factor IIIB 90 kDa subunit (TFIIIB90) and similar ...
74-160
3.27e-03
first cyclin box found in transcription factor IIIB 90 kDa subunit (TFIIIB90) and similar proteins; TFIIIB90, also called B-related factor 1 (BRF-1), or TATA box-binding protein-associated factor, RNA polymerase III, subunit 2 (TAF3B2), is a general activator of RNA polymerase which utilizes different TFIIIB complexes at structurally distinct promoters. TFIIIB90 contains two cyclin boxes. This model corresponds to the first one. The cyclin box fold is generally a protein binding domain, but binds DNA in TFIIIB90.
Pssm-ID: 410256 [Multi-domain] Cd Length: 91 Bit Score: 36.74 E-value: 3.27e-03
first cyclin box found in transcription initiation factor IIB (TFIIB) and similar proteins; ...
74-161
3.81e-03
first cyclin box found in transcription initiation factor IIB (TFIIB) and similar proteins; TFIIB, also called B-related factor 2 (BRF-2) or S300-II, is a general transcription factor that plays a role in transcription initiation by RNA polymerase II (Pol II). It is involved in the pre-initiation complex (PIC) formation and Pol II recruitment at promoter DNA. TFIIB contains two cyclin boxes. This model corresponds to the first one. The cyclin box fold is generally a protein binding domain, but binds DNA in TFIIB.
Pssm-ID: 410254 [Multi-domain] Cd Length: 88 Bit Score: 36.41 E-value: 3.81e-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.
of the residues that compose this conserved feature have been mapped to the query sequence.
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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
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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
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the domain superfamily to which the specific and non-specific hits belong
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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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