FB2024_03 , released June 25, 2024
Gene: Dmel\Tfb1
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General Information
Symbol
Dmel\Tfb1
Species
D. melanogaster
Name
Transcription factor B1
Annotation Symbol
CG8151
Feature Type
FlyBase ID
FBgn0033929
Gene Model Status
Stock Availability
Gene Summary
Transcription factor B1 (Tfb1) encodes a subunit of the Transcription factor II H complex (TFIIH). TFIIH operates in RNA polymerase I and II-mediated transcription, DNA repair and cell cycle regulation. [Date last reviewed: 2019-03-14] (FlyBase Gene Snapshot)
Also Known As

l(2)06949, p62, TfBl

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
2-70
RefSeq locus
NT_033778 REGION:14363048..14365473
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (12 terms)
Molecular Function (0 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (0 terms)
Biological Process (9 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
involved_in response to UV
inferred from mutant phenotype
Terms Based on Predictions or Assertions (8 terms)
CV Term
Evidence
References
involved_in DNA repair
inferred from biological aspect of ancestor with PANTHER:PTN000304482
inferred from electronic annotation with InterPro:IPR027079
inferred from sequence or structural similarity with HGNC:4655
inferred from electronic annotation with InterPro:IPR027079
inferred from sequence or structural similarity with HGNC:4655
inferred from biological aspect of ancestor with PANTHER:PTN000304482
inferred from biological aspect of ancestor with PANTHER:PTN000304482
inferred from sequence or structural similarity with HGNC:4655
inferred from sequence or structural similarity with SGD:S000002719
inferred from sequence or structural similarity with HGNC:4655
Cellular Component (3 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (3 terms)
CV Term
Evidence
References
located_in nucleus
inferred from sequence or structural similarity with HGNC:4655
inferred from sequence or structural similarity with SGD:S000002719
inferred from biological aspect of ancestor with PANTHER:PTN000304482
inferred from electronic annotation with InterPro:IPR027079
inferred from sequence or structural similarity with HGNC:4655
inferred from sequence or structural similarity with SGD:S000002719
inferred from sequence or structural similarity with HGNC:4655
inferred from sequence or structural similarity with SGD:S000002719
inferred from biological aspect of ancestor with PANTHER:PTN000304482
Protein Family (UniProt)
Belongs to the TFB1 family. (Q960E8)
Summaries
Gene Snapshot
Transcription factor B1 (Tfb1) encodes a subunit of the Transcription factor II H complex (TFIIH). TFIIH operates in RNA polymerase I and II-mediated transcription, DNA repair and cell cycle regulation. [Date last reviewed: 2019-03-14]
Gene Group (FlyBase)
TRANSCRIPTION FACTOR II H - CORE COMPLEX -
The general transcription factor complex Transcription factor II H (TFIIH) core complex, is a subcomplex of the TFIIH holoenzyme required in RNA pol II transcription with an ATP-dependent DNA helicase activity required for promoter DNA opening. TFIIH also functions in nucleotide excision repair (NER). After complex loading and the verification step of NER, the cyclin-dependent protein kinase-activating kinase (CAK) subcomplex dissociates and the TFIIH core complex functions independently. (Adapted from PMID:25693126, PMID:21592869 and PMID:30798933).
Protein Function (UniProtKB)
Component of the general transcription and DNA repair factor IIH (TFIIH) core complex, which is involved in general and transcription-coupled nucleotide excision repair (NER) of damaged DNA and, when complexed to CAK, in RNA transcription by RNA polymerase II. In NER, TFIIH acts by opening DNA around the lesion to allow the excision of the damaged oligonucleotide and its replacement by a new DNA fragment. In transcription, TFIIH has an essential role in transcription initiation. When the pre-initiation complex (PIC) has been established, TFIIH is required for promoter opening and promoter escape. Phosphorylation of the C-terminal tail (CTD) of the largest subunit of RNA polymerase II by the kinase module CAK controls the initiation of transcription.
(UniProt, Q960E8)
Gene Model and Products
Number of Transcripts
4
Number of Unique Polypeptides
1

Please see the JBrowse view of Dmel\Tfb1 for information on other features

To submit a correction to a gene model please use the Contact FlyBase form

Protein Domains (via Pfam)
Isoform displayed:
Pfam protein domains
InterPro name
classification
start
end
Protein Domains (via SMART)
Isoform displayed:
SMART protein domains
InterPro name
classification
start
end
Structure
Protein 3D structure   (Predicted by AlphaFold)   (AlphaFold entry Q960E8)

If you don't see a structure in the viewer, refresh your browser.
Model Confidence:
  • Very high (pLDDT > 90)
  • Confident (90 > pLDDT > 70)
  • Low (70 > pLDDT > 50)
  • Very low (pLDDT < 50)

AlphaFold produces a per-residue confidence score (pLDDT) between 0 and 100. Some regions with low pLDDT may be unstructured in isolation.

Experimentally Determined Structures
Crossreferences
Comments on Gene Model

Low-frequency RNA-Seq exon junction(s) not annotated.

Gene model reviewed during 5.50

Sequence Ontology: Class of Gene
Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0087550
2145
585
FBtr0087548
2025
585
FBtr0087549
2022
585
FBtr0305616
2018
585
Additional Transcript Data and Comments
Reported size (kB)
Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0086678
66.3
585
9.27
FBpp0086676
66.3
585
9.27
FBpp0086677
66.3
585
9.27
FBpp0294063
66.3
585
9.27
Polypeptides with Identical Sequences

The group(s) of polypeptides indicated below share identical sequence to each other.

585 aa isoforms: Tfb1-PA, Tfb1-PB, Tfb1-PC, Tfb1-PD
Additional Polypeptide Data and Comments
Reported size (kDa)
Comments
External Data
Subunit Structure (UniProtKB)

Component of the 7-subunit TFIIH core complex composed of XPB/ERCC3, XPD/ERCC2, GTF2H1, GTF2H2, GTF2H3, GTF2H4 and GTF2H5, which is active in NER. The core complex associates with the 3-subunit CDK-activating kinase (CAK) module composed of CCNH/cyclin H, CDK7 and MNAT1 to form the 10-subunit holoenzyme (holo-TFIIH) active in transcription.

(UniProt, Q960E8)
Crossreferences
Linkouts
Sequences Consistent with the Gene Model
Mapped Features

Click to get a list of regulatory features (enhancers, TFBS, etc.) and gene disruptions (point mutations, indels, etc.) within or overlapping Dmel\Tfb1 using the Feature Mapper tool.

External Data
Crossreferences
Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
Linkouts
Expression Data
Testis-specificity index

The testis specificity index was calculated from modENCODE tissue expression data by Vedelek et al., 2018 to indicate the degree of testis enrichment compared to other tissues. Scores range from -2.52 (underrepresented) to 5.2 (very high testis bias).

2.37

Transcript Expression
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
organism

Comment: maternally deposited

RT-PCR
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

RT-PCR analysis indicates that transcript is present in all stages of development. Expression is higher in gastrulating embryos and transcript is expressed preferentially in adult males.

Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Evidence
References
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\Tfb1 in JBrowse
RNA-Seq by Region - Search RNA-Seq expression levels by exon or genomic region
Reference
See Gelbart and Emmert, 2013 for analysis details and data files for all genes.
Developmental Proteome: Life Cycle
Developmental Proteome: Embryogenesis
External Data and Images
Linkouts
BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
DRscDB - A single-cell RNA-seq resource for data mining and data comparison across species
EMBL-EBI Single Cell Expression Atlas - Single cell expression across species
FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
FlyAtlas2 - A Drosophila melanogaster expression atlas with RNA-Seq, miRNA-Seq and sex-specific data
Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
Flygut - An atlas of the Drosophila adult midgut
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 8 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 8 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Tfb1
Transgenic constructs containing regulatory region of Tfb1
Aberrations (Deficiencies and Duplications) ( 4 )
Variants
Variant Molecular Consequences
Alleles Representing Disease-Implicated Variants
Phenotypes
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (2)
14 of 14
Yes
Yes
1  
1 of 14
No
No
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (2)
14 of 14
Yes
Yes
1 of 14
No
No
Mus musculus (laboratory mouse) (2)
13 of 14
Yes
Yes
1 of 14
No
No
Xenopus tropicalis (Western clawed frog) (3)
8 of 13
Yes
Yes
6 of 13
No
Yes
1 of 13
No
Yes
Danio rerio (Zebrafish) (2)
14 of 14
Yes
Yes
1 of 14
No
No
Caenorhabditis elegans (Nematode, roundworm) (2)
13 of 14
Yes
Yes
1 of 14
No
No
Anopheles gambiae (African malaria mosquito) (2)
12 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (2)
13 of 13
Yes
Yes
13 of 13
Yes
Yes
Saccharomyces cerevisiae (Brewer's yeast) (1)
9 of 13
Yes
Yes
Schizosaccharomyces pombe (Fission yeast) (1)
7 of 12
Yes
Yes
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:Tfb1. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (1)
1 of 13
Human Disease Associations
FlyBase Human Disease Model Reports
    Disease Ontology (DO) Annotations
    Models Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Evidence
    References
    Potential Models Based on Orthology ( 0 )
    Human Ortholog
    Disease
    Evidence
    References
    Modifiers Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Interaction
    References
    Disease Associations of Human Orthologs (via DIOPT v9.1 and OMIM)
    Note that ortholog calls supported by only 1 or 2 algorithms (DIOPT score < 3) are not shown.
    Homo sapiens (Human)
    Gene name
    Score
    OMIM
    OMIM Phenotype
    DO term
    Complementation?
    Transgene?
    Functional Complementation Data
    Functional complementation data is computed by FlyBase using a combination of the orthology data obtained from DIOPT and OrthoDB and the allele-level genetic interaction data curated from the literature.
    Interactions
    Summary of Physical Interactions
    esyN Network Diagram
    Show neighbor-neighbor interactions:
    Show/hide secondary interactors 
    (data from AllianceMine provided by esyN)
    Select Layout:
    Legend:
    Protein
    RNA
    Selected Interactor(s)
    Other Interaction Browsers

    Please see the Physical Interaction reports below for full details
    protein-protein
    Physical Interaction
    Assay
    References
    Summary of Genetic Interactions
    esyN Network Diagram
    Other Interaction Browsers
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    External Data
    Subunit Structure (UniProtKB)
    Component of the 7-subunit TFIIH core complex composed of XPB/ERCC3, XPD/ERCC2, GTF2H1, GTF2H2, GTF2H3, GTF2H4 and GTF2H5, which is active in NER. The core complex associates with the 3-subunit CDK-activating kinase (CAK) module composed of CCNH/cyclin H, CDK7 and MNAT1 to form the 10-subunit holoenzyme (holo-TFIIH) active in transcription.
    (UniProt, Q960E8 )
    Linkouts
    BioGRID - A database of protein and genetic interactions.
    DroID - A comprehensive database of gene and protein interactions.
    MIST (protein-protein) - An integrated Molecular Interaction Database
    Pathways
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    2R
    Recombination map
    2-70
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    50F6-50F6
    Limits computationally determined from genome sequence between P{lacW}l(2)s3475s3475&P{lacW}Hsc70-5k04907 and P{PZ}Tfb106949&P{PZ}l(2)0356303563
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    51A1-51A2
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Left of (cM)
    Right of (cM)
    Notes

    17 recombinants in 29,738 progeny.

    Stocks and Reagents
    Stocks (14)
    Genomic Clones (14)
     

    Please Note FlyBase no longer curates genomic clone accessions so this list may not be complete

    cDNA Clones (39)
     

    Please Note This section lists cDNAs and ESTs that fall within the genomic extent of the gene model, which may include cDNAs and ESTs of genes within introns, or of overlapping genes. Please see JBrowse for alignment of the cDNAs and ESTs to the gene model.

    cDNA clones, fully sequenced
    BDGP DGC clones
    Other clones
      Drosophila Genomics Resource Center cDNA clones

      For each fully sequenced cDNA the DGRC maintains various forms of the cDNA (e.g tagged or untagged) in several different host vectors for subsequent cloning and expression in Drosophila and Drosophila cell lines.

      cDNA Clones, End Sequenced (ESTs)
      RNAi and Array Information
      Linkouts
      DRSC - Results frm RNAi screens
      Antibody Information
      Laboratory Generated Antibodies
       
      Commercially Available Antibodies
       
      Cell Line Information
      Publicly Available Cell Lines
       
        Other Stable Cell Lines
         
          Other Comments

          Tfb1 heterozygotes are more sensitive to UV light irradiation than normal.

          Relationship to Other Genes
          Source for database merge of

          Source for merge of: Tfb1 l(2)06949

          Additional comments

          "Tfb1" may correspond to "Scim25". Sequence analysis off ends of P{SUPor-P} in Scim insertion mutant places "Scim25" near/in "Tfb1" or "CG13941".

          "l(2)06949" probably corresponds to "CG8151"; the P{PZ} insertion in the "l(2)0694906949" allele maps 35bp upstream of the 5' end of the CT24236 transcript of "CG8151".

          Nomenclature History
          Source for database identify of

          Source for identity of: Tfb1 CG8151

          Nomenclature comments
          Etymology

          Named "Tfb1" after the S. cerevisiae ortholog.

          Synonyms and Secondary IDs (10)
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          Study result (0)
          Result
          Result Type
          Title
          External Crossreferences and Linkouts ( 70 )
          Sequence Crossreferences
          NCBI Gene - Gene integrates information from a wide range of species. A record may include nomenclature, Reference Sequences (RefSeqs), maps, pathways, variations, phenotypes, and links to genome-, phenotype-, and locus-specific resources worldwide.
          GenBank Nucleotide - A collection of sequences from several sources, including GenBank, RefSeq, TPA, and PDB.
          GenBank Protein - A collection of sequences from several sources, including translations from annotated coding regions in GenBank, RefSeq and TPA, as well as records from SwissProt, PIR, PRF, and PDB.
          RefSeq - A comprehensive, integrated, non-redundant, well-annotated set of reference sequences including genomic, transcript, and protein.
          UniProt/GCRP - The gene-centric reference proteome (GCRP) provides a 1:1 mapping between genes and UniProt accessions in which a single 'canonical' isoform represents the product(s) of each protein-coding gene.
          UniProt/Swiss-Prot - Manually annotated and reviewed records of protein sequence and functional information
          UniProt/TrEMBL - Automatically annotated and unreviewed records of protein sequence and functional information
          Other crossreferences
          AlphaFold DB - AlphaFold provides open access to protein structure predictions for the human proteome and other key proteins of interest, to accelerate scientific research.
          BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
          DRscDB - A single-cell RNA-seq resource for data mining and data comparison across species
          EMBL-EBI Single Cell Expression Atlas - Single cell expression across species
          FlyAtlas2 - A Drosophila melanogaster expression atlas with RNA-Seq, miRNA-Seq and sex-specific data
          FlyMine - An integrated database for Drosophila genomics
          KEGG Genes - Molecular building blocks of life in the genomic space.
          MARRVEL_MODEL - MARRVEL (model organism gene)
          Linkouts
          BioGRID - A database of protein and genetic interactions.
          Drosophila Genomics Resource Center - Drosophila Genomics Resource Center (DGRC) cDNA clones
          DroID - A comprehensive database of gene and protein interactions.
          DRSC - Results frm RNAi screens
          Eukaryotic Promoter Database - A collection of databases of experimentally validated promoters for selected model organisms.
          FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
          FlyCyc Genes - Genes from a BioCyc PGDB for Dmel
          Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
          Flygut - An atlas of the Drosophila adult midgut
          FlyMet - A comprehensive tissue-specific metabolomics resource for Drosophila.
          iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
          KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
          MIST (protein-protein) - An integrated Molecular Interaction Database
          References (61)