FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene: Dmel\cuff
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General Information
Symbol
Dmel\cuff
Species
D. melanogaster
Name
cutoff
Annotation Symbol
CG13190
Feature Type
FlyBase ID
FBgn0260932
Gene Model Status
Stock Availability
Gene Summary
cutoff (cuff) encodes a protein that interacts with the products of rhi and del in a germline complex that allows noncanonical transcription of dual-strand piRNA clusters. The product of cuff is therefore an integral part of the piRNA response to transposon activity in the germline. In its absence, a DNA damage checkpoint is activated leading to ventralization of the egg and embryo. [Date last reviewed: 2019-03-07] (FlyBase Gene Snapshot)
Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
2-65
RefSeq locus
NT_033778 REGION:11886067..11887603
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (18 terms)
Molecular Function (2 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
inferred from direct assay
inferred from direct assay
Terms Based on Predictions or Assertions (0 terms)
Biological Process (12 terms)
Terms Based on Experimental Evidence (10 terms)
CV Term
Evidence
References
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
involved_in oogenesis
inferred from high throughput mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
involved_in siRNA processing
inferred from mutant phenotype
inferred from mutant phenotype
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
involved_in NAD-cap decapping
inferred from biological aspect of ancestor with PANTHER:PTN000273640
Cellular Component (4 terms)
Terms Based on Experimental Evidence (3 terms)
CV Term
Evidence
References
located_in cytoplasm
inferred from direct assay
located_in nucleus
inferred from direct assay
inferred from direct assay
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
is_active_in cytosol
inferred from biological aspect of ancestor with PANTHER:PTN000273640
is_active_in nucleus
inferred from biological aspect of ancestor with PANTHER:PTN000273640
Protein Family (UniProt)
Belongs to the DXO/Dom3Z family. (Q9V629)
Protein Signatures (InterPro)
Summaries
Gene Snapshot
cutoff (cuff) encodes a protein that interacts with the products of rhi and del in a germline complex that allows noncanonical transcription of dual-strand piRNA clusters. The product of cuff is therefore an integral part of the piRNA response to transposon activity in the germline. In its absence, a DNA damage checkpoint is activated leading to ventralization of the egg and embryo. [Date last reviewed: 2019-03-07]
Gene Group (FlyBase)
RHINO-DEADLOCK-CUTOFF COMPLEX -
The Rhino-Deadlock-Cutoff (RDC) complex is a trimer that binds H3K9me3 and anchors itself onto dual-strand clusters. RDC complex regulates the non-canonical transcription and co-transcriptional processing of PIWI interacting RNA (piRNA) precursors and transposon silencing. (Adapted from FBrf0225218 and FBrf0250952).
UNCLASSIFIED PSEUDOENZYMES -
This group comprises pseudoenzymes that do not classify under other groups in FlyBase.
Protein Function (UniProtKB)
Involved in the piRNA pathway in germline tissues (PubMed:17363252, PubMed:21952049). Part of the Rhino-Deadlock-Cutoff (RDC) complex that stimulates piRNA biogenesis from chromatin regions corresponding to dual-strand, but not single-stranded, piRNA clusters (PubMed:24906153, PubMed:25085419, PubMed:27292797). Promotes transcription of long piRNA precursors by preventing termination at canonical poly(A) sites (PubMed:27292797). As part of the RDC complex, is recruited to chromatin enriched in histone modification H3K9me3 and might contribute to complex interaction by binding nascent transcript nucleic acid chains (PubMed:24906153, PubMed:25085419, PubMed:27292797). Associates with chromatin upon exposure to homologous piRNA (PubMed:27292797). Suppresses cleavage at canonical poly(A) sites by blocking recruitment of the cleavage and polyadenylation specificity factor (CPSF) complex and prevents transcriptional termination by RNA polymerase II, facilitating transcriptional read-through (PubMed:27292797). As part of the RDC complex, involved in suppression of splicing (PubMed:27292797). Catalytically inactive, lacking 5'-3' exonuclease and pyrophosphohydrolase activities (PubMed:27292797). Stabilizes uncapped piRNA precursors in the nucleus, probably by sequestering or blocking the exonuclease activity of Rat1 (PubMed:27292797). May also be involved in siRNA biogenesis from dual-strand piRNA clusters (PubMed:25085419).
(UniProt, Q9V629)
Phenotypic Description (Red Book; Lindsley and Zimm 1992)
cuff: cutoff (T. Schupbach)
female-sterile; homozygous females often have underdeveloped ovaries which seem to lack germ cells altogether. In some females, a small number of developing egg chambers is found; these never develop beyond the first few stages of oogenesis.
Summary (Interactive Fly)

a protein related to a yeast transcription termination factor - involved in piwiRNA cluster expression, which is critical for oocyte development

Gene Model and Products
Number of Transcripts
1
Number of Unique Polypeptides
1

Please see the JBrowse view of Dmel\cuff 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 Q9V629)

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 5.42

Gene model reviewed during 5.49

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0088034
1295
384
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
FBpp0087141
44.8
384
7.47
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 Rhino-Deadlock-Cutoff (RDC) complex, composed of rhi/rhino, del/deadlock and cuff/cutoff (PubMed:24906153). Interacts with rhi/rhino; this interaction is indirect and is mediated by del/deadlock (PubMed:21952049, PubMed:24906153, PubMed:25085419). Interacts with del/deadlock (via C-terminal); this interaction is direct (PubMed:24906153). Interacts with Rat1 (PubMed:27292797).

(UniProt, Q9V629)
Crossreferences
InterPro - A database of protein families, domains and functional sites
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\cuff 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).

0.91

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

JBrowse - Visual display of RNA-Seq signals

View Dmel\cuff 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
Flygut - An atlas of the Drosophila adult midgut
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 10 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 16 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of cuff
Transgenic constructs containing regulatory region of cuff
Aberrations (Deficiencies and Duplications) ( 0 )
Inferred from experimentation ( 0 )
Inferred from location ( 6 )
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) (1)
4 of 14
Yes
No
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (1)
4 of 14
Yes
No
Mus musculus (laboratory mouse) (1)
3 of 14
Yes
No
Xenopus tropicalis (Western clawed frog) (1)
3 of 13
Yes
No
Danio rerio (Zebrafish) (1)
2 of 14
Yes
No
Caenorhabditis elegans (Nematode, roundworm) (11)
4 of 14
Yes
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
Anopheles gambiae (African malaria mosquito) (1)
Arabidopsis thaliana (thale-cress) (1)
4 of 13
Yes
No
Saccharomyces cerevisiae (Brewer's yeast) (2)
4 of 13
Yes
No
2 of 13
No
Yes
Schizosaccharomyces pombe (Fission yeast) (1)
3 of 12
Yes
No
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:cuff. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (1)
5 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
    Summary of Genetic Interactions
    Interaction Browsers

    Please look at the allele data for full details of the genetic interactions
    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 Rhino-Deadlock-Cutoff (RDC) complex, composed of rhi/rhino, del/deadlock and cuff/cutoff (PubMed:24906153). Interacts with rhi/rhino; this interaction is indirect and is mediated by del/deadlock (PubMed:21952049, PubMed:24906153, PubMed:25085419). Interacts with del/deadlock (via C-terminal); this interaction is direct (PubMed:24906153). Interacts with Rat1 (PubMed:27292797).
    (UniProt, Q9V629 )
    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
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    FlyBase
    External Links
    External Data
    Linkouts
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    2R
    Recombination map
    2-65
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    48C5-48C5
    Limits computationally determined from genome sequence between P{EP}walEP825&P{PZ}wal02516 and P{PZ}Ef1α48D01275
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (9)
    Genomic Clones (12)
     

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

    cDNA Clones (4)
     

    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
        Other clones
        RNAi and Array Information
        Linkouts
        DRSC - Results frm RNAi screens
        Antibody Information
        Laboratory Generated Antibodies
         

        polyclonal

        Commercially Available Antibodies
         
        Developmental Studies Hybridoma Bank - Monoclonal antibodies for use in research
        Cell Line Information
        Publicly Available Cell Lines
         
          Other Stable Cell Lines
           
            Other Comments

            The cuff locus affects early oogenesis: mutations cause the production of few, defective germ cells.

            Relationship to Other Genes
            Source for database merge of

            Source for merge of: cuff CG13190

            Additional comments
            Nomenclature History
            Source for database identify of
            Nomenclature comments
            Etymology
            Synonyms and Secondary IDs (7)
            Reported As
            Secondary FlyBase IDs
            • FBgn0000390
            • FBgn0033662
            Datasets (0)
            Study focus (0)
            Experimental Role
            Project
            Project Type
            Title
            Study result (0)
            Result
            Result Type
            Title
            External Crossreferences and Linkouts ( 29 )
            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.
            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
            InterPro - A database of protein families, domains and functional sites
            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
            Developmental Studies Hybridoma Bank - Monoclonal antibodies for use in research
            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
            Interactive Fly - A cyberspace guide to Drosophila development and metazoan evolution
            MIST (protein-protein) - An integrated Molecular Interaction Database
            References (87)