FB2025_01 , released February 20, 2025
Gene: Dmel\Polr2F
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General Information
Symbol
Dmel\Polr2F
Species
D. melanogaster
Name
RNA polymerase II, I and III subunit F
Annotation Symbol
CG1163
Feature Type
FlyBase ID
FBgn0003275
Gene Model Status
Stock Availability
Enzyme Name (EC)
DNA-directed RNA polymerase (2.7.7.6)
Gene Summary
RNA polymerase II, I and III subunit F (Polr2F) encodes a shared subunit of RNA polymerases I, II, and III. [Date last reviewed: 2018-09-20] (FlyBase Gene Snapshot)
Also Known As

RNA polymerase II, Pol II, RpII18, PolII, RNA Pol II

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
3-47.5
RefSeq locus
NT_033777 REGION:5371795..5372397
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (10 terms)
Molecular Function (2 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
Biological Process (4 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (4 terms)
CV Term
Evidence
References
inferred from sequence or structural similarity with UniProtKB:P20435
inferred from biological aspect of ancestor with PANTHER:PTN008715205
inferred from sequence or structural similarity with UniProtKB:P20435
inferred from biological aspect of ancestor with PANTHER:PTN008715205
inferred from sequence or structural similarity with UniProtKB:P20435
inferred from biological aspect of ancestor with PANTHER:PTN008715205
Cellular Component (4 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
inferred from direct assay
Terms Based on Predictions or Assertions (4 terms)
CV Term
Evidence
References
located_in nucleus
inferred from electronic annotation with InterPro:IPR028363
inferred from biological aspect of ancestor with PANTHER:PTN000080812
inferred from sequence or structural similarity with UniProtKB:P20435
inferred from biological aspect of ancestor with PANTHER:PTN000080812
inferred from electronic annotation with InterPro:IPR028363
inferred from sequence or structural similarity with UniProtKB:P20435
inferred from biological aspect of ancestor with PANTHER:PTN000080812
inferred from sequence or structural similarity with UniProtKB:P20435
Protein Family (UniProt)
Belongs to the archaeal Rpo6/eukaryotic RPB6 RNA polymerase subunit family. (Q24320)
Catalytic Activity (EC/Rhea)
DNA-directed 5'-3' RNA polymerase activity
RNA(n) + a ribonucleoside 5'-triphosphate = RNA(n+1) + diphosphate (2.7.7.6)
Summaries
Gene Snapshot
RNA polymerase II, I and III subunit F (Polr2F) encodes a shared subunit of RNA polymerases I, II, and III. [Date last reviewed: 2018-09-20]
Gene Group (FlyBase)
RNA POLYMERASE II -
RNA Polymerase II (RNAP II) synthesizes mRNAs and a variety of non-coding RNAs, including snRNAs, snoRNAs, microRNAs, piRNAs and lncRNAs. It comprises 12-13 subunits (13 in D. melanogaster), ten of which form a structurally conserved catalytic core with additional subunits located on the periphery. Notably, five RNAP II subunits are shared with the other two nuclear RNAPs. For transcription initiation, RNAPII assembles with the general transcription factors at promoter DNA to form the pre-initiation complex. (Adapted from FBrf0247389, FBrf0228779, FBrf0213652, PMID:25693126, PMID:23463798 and PMID:17318225.)
RNA POLYMERASE I -
RNA polymerase I (RNAP I) synthesizes the ribosomal RNA precursor that is processed into most ribosomal RNAs (rRNAs). It comprises 12-14 subunits (12 in D. melanogaster), ten of which form a structurally conserved catalytic core with additional subunits located on the periphery. Notably, five RNAP I subunits are shared with the other two nuclear RNAPs, and two others are shared between RNAPs I and III. (Adapted from FBrf0247389.)
RNA POLYMERASE III -
RNA polymerase III (RNAP III) synthesizes short, non-coding RNAs including tRNAs, the small 5S rRNA and the U6 snRNA. It comprises 17 subunits, ten of which form a structurally conserved catalytic core with additional subunits located on the periphery. Notably, five RNAP III subunits are shared among all three RNAPs and two others are shared between RNAPs I and III. (Adapted from FBrf0247389.)
RNA POLYMERASE CATALYTIC SUBUNITS -
DNA-directed RNA polymerases (RNAPs) catalyze the synthesis of RNA from DNA templates. Nuclear DNA is transcribed by three different multi-subunit polymerases, RNAPs I, II and III, which synthesize mRNAs, rRNAs, tRNAs and other non-coding RNAs. Although composed of between 12-17 subunits, all three nuclear RNAPs contain a ten-subunit catalytic core. Mitochondrial RNA is synthesized by a single subunit RNA polymerase. DNA primases are a class of RNA polymerases that catalyse the synthesis of short RNA primers that are extended by DNA polymerases during DNA replication. (Adapted from PMID:22365827 and PMID:19540940.)
Protein Function (UniProtKB)
DNA-dependent RNA polymerases catalyze the transcription of DNA into RNA using the four ribonucleoside triphosphates as substrates. Common component of RNA polymerases I, II and III which synthesize ribosomal RNA precursors, mRNA precursors and many functional non-coding RNAs, and small RNAs, such as 5S rRNA and tRNAs, respectively. Pol II is the central component of the basal RNA polymerase II transcription machinery. Pols are composed of mobile elements that move relative to each other. In Pol II, Polr2F/RPB6 is part of the clamp element and together with parts of Polr2A/RPB1 and RPB2 forms a pocket to which the Polr2D/RPB4-Polr2G/RPB7 subcomplex binds (By similarity).
(UniProt, Q24320)
Gene Model and Products
Number of Transcripts
1
Number of Unique Polypeptides
1

Please see the JBrowse view of Dmel\Polr2F 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 Q24320)

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

Gene model reviewed during 5.45

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0078787
541
131
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
FBpp0078433
14.7
131
3.91
Polypeptides with Identical Sequences

There is only one protein coding transcript and one polypeptide associated with this gene

Additional Polypeptide Data and Comments
Reported size (kDa)
Comments
External Data
Subunit Structure (UniProtKB)

Component of the RNA polymerase I (Pol I), RNA polymerase II (Pol II) and RNA polymerase III (Pol III) complexes consisting of at least 13, 12 and 17 subunits, respectively.

(UniProt, Q24320)
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\Polr2F 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).

4.60

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

JBrowse - Visual display of RNA-Seq signals

View Dmel\Polr2F 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
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
Flygut - An atlas of the Drosophila adult midgut
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 0 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 6 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Polr2F
Transgenic constructs containing regulatory region of Polr2F
Aberrations (Deficiencies and Duplications) ( 0 )
Inferred from experimentation ( 0 )
Inferred from location ( 4 )
Variants
Variant Molecular Consequences
Alleles Representing Disease-Implicated Variants
Phenotypes
For more details about a specific phenotype click on the relevant allele symbol.
Lethality
Allele
Phenotype manifest in
Allele
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (1)
14 of 14
Yes
Yes
1  
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (1)
14 of 14
Yes
Yes
Mus musculus (laboratory mouse) (1)
12 of 14
Yes
Yes
Xenopus tropicalis (Western clawed frog) (2)
11 of 13
Yes
Yes
1 of 13
No
Yes
Danio rerio (Zebrafish) (1)
14 of 14
Yes
Yes
Caenorhabditis elegans (Nematode, roundworm) (1)
14 of 14
Yes
Yes
Anopheles gambiae (African malaria mosquito) (1)
12 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (3)
12 of 13
Yes
Yes
12 of 13
Yes
Yes
1 of 13
No
Yes
Saccharomyces cerevisiae (Brewer's yeast) (1)
11 of 13
Yes
Yes
Schizosaccharomyces pombe (Fission yeast) (1)
10 of 12
Yes
Yes
Escherichia coli (enterobacterium) (1)
1 of 11
Yes
Yes
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:Polr2F. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
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 RNA polymerase I (Pol I), RNA polymerase II (Pol II) and RNA polymerase III (Pol III) complexes consisting of at least 13, 12 and 17 subunits, respectively.
    (UniProt, Q24320 )
    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
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    3R
    Recombination map
    3-47.5
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    83A1-83A1
    Limits computationally determined from genome sequence between P{PZ}l(3)0273302733 and P{EP}EP974
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    83A-83A
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (4)
    Genomic Clones (16)
     

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

    cDNA Clones (46)
     

    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)
      BDGP DGC clones
      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

          DNA-protein interactions: genome-wide binding profile assayed for RpII18 protein in Kc167 cells; see Chromatin_types_NKI collection report. Individual protein-binding experiments listed under "Samples" at GEO_GSE22069 (http://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE22069).

          RNAi screen using dsRNA made from templates generated with primers directed against this gene results in aberrantly long spindles with misaligned chromosomes when assayed in S2 cells in the presence of Cdc27 dsRNA. This phenotype cannot be observed when the screen is performed without Cdc27 dsRNA.

          Used in a phylogenetic analysis, the tree in inferred by parsimony method from RpoB sequences, or homologous, multiple alignment.

          Isolated from a D.melanogaster embryonic cDNA library using human Hs6 (hRPB14.4) cDNA as a probe.

          RpII18 cDNA has been cloned and sequenced.

          The technique of paramagnetic particle-mediated selection of terminated run-on transcripts was used to examine RNA polymerase II pausing and 5' cap formation at high resolution on the heat shock genes Hsp70A, Hsp70B, Hsp26 and Hsp27. Results demonstrate that polymerases pause over a narrow region of each heat shock gene, not at a defined point. 5' capping occurs over a region coincidental with that of pausing.

          Protein complexes of RNA polymerase II localise to major developmental puffs and heat shock puffs.

          Relationship to Other Genes
          Source for database merge of

          Source for merge of: RpII18 RpABC14

          Source for merge of: RpII18 BcDNA:RH21608

          Additional comments

          Source for merge of RpII18 BcDNA:RH21608 was a shared cDNA ( date:030728 ).

          Nomenclature History
          Source for database identify of

          Source for identity of: RpABC14 CG1163

          Source for identity of: Polr2F RpII18

          Nomenclature comments
          Etymology

          Named 'Polr2F' after the human ortholog.

          Synonyms and Secondary IDs (29)
          Reported As
          Secondary FlyBase IDs
          • FBgn0014025
          • FBgn0064834
          Datasets (1)
          Study focus (1)
          Experimental Role
          Project
          Project Type
          Title
          • transgene_used
          Protein profiling reveals five principal chromatin types in Drosophila cells.
          Study result (0)
          Result
          Result Type
          Title
          External Crossreferences and Linkouts ( 60 )
          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
          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.
          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
          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 (110)