FB2024_04 , released June 25, 2024
Gene: Dmel\Septin1
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General Information
Symbol
Dmel\Septin1
Species
D. melanogaster
Name
Septin 1
Annotation Symbol
CG1403
Feature Type
FlyBase ID
FBgn0011710
Gene Model Status
Stock Availability
Gene Summary
Septin 1 (Septin1) encodes a member of the septin family of GTP-binding proteins. Septins form hetero-oligomeric filaments and rings that associate with filamentous actin. Septin1, together with Septin5 and pnut, is required for the bundling of actin filaments into compact cytoskeleton cables during dorsoventral wing adhesion. [Date last reviewed: 2021-09-23] (FlyBase Gene Snapshot)
Also Known As

Sep1, septin, iby, dSEPT1

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
1-65
RefSeq locus
NC_004354 REGION:21358286..21361688
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (19 terms)
Molecular Function (6 terms)
Terms Based on Experimental Evidence (5 terms)
CV Term
Evidence
References
enables GTP binding
inferred from direct assay
inferred from direct assay
inferred from physical interaction with FLYBASE:sip2; FB:FBgn0031878
inferred from direct assay
inferred from physical interaction with FLYBASE:park; FB:FBgn0041100
Terms Based on Predictions or Assertions (3 terms)
CV Term
Evidence
References
enables GTP binding
inferred from electronic annotation with InterPro:IPR016491, InterPro:IPR030379
inferred from biological aspect of ancestor with PANTHER:PTN000430171
inferred from sequence or structural similarity with FLYBASE:pnut; FB:FBgn0013726
inferred from biological aspect of ancestor with PANTHER:PTN000430171
Biological Process (6 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
inferred from mutant phenotype
inferred from direct assay
Terms Based on Predictions or Assertions (4 terms)
CV Term
Evidence
References
involved_in cellularization
traceable author statement
inferred from biological aspect of ancestor with PANTHER:PTN000430171
inferred from biological aspect of ancestor with PANTHER:PTN000430171
inferred from biological aspect of ancestor with PANTHER:PTN004499727
Cellular Component (7 terms)
Terms Based on Experimental Evidence (3 terms)
CV Term
Evidence
References
located_in cleavage furrow
inferred from direct assay
colocalizes_with contractile ring
inferred from high throughput direct assay
inferred from direct assay
Terms Based on Predictions or Assertions (5 terms)
CV Term
Evidence
References
is_active_in cell division site
inferred from biological aspect of ancestor with PANTHER:PTN000430171
inferred from biological aspect of ancestor with PANTHER:PTN000430171
inferred from biological aspect of ancestor with PANTHER:PTN000430171
is_active_in septin ring
inferred from biological aspect of ancestor with PANTHER:PTN000430171
is_active_in synaptic vesicle
inferred from biological aspect of ancestor with PANTHER:PTN004499727
Gene Group (FlyBase)
Protein Family (UniProt)
Belongs to the TRAFAC class TrmE-Era-EngA-EngB-Septin-like GTPase superfamily. Septin GTPase family. (P42207)
Catalytic Activity (EC/Rhea)
GTPase activity
RHEA 19669:
Summaries
Gene Snapshot
Septin 1 (Septin1) encodes a member of the septin family of GTP-binding proteins. Septins form hetero-oligomeric filaments and rings that associate with filamentous actin. Septin1, together with Septin5 and pnut, is required for the bundling of actin filaments into compact cytoskeleton cables during dorsoventral wing adhesion. [Date last reviewed: 2021-09-23]
Gene Group (FlyBase)
SEPTINS -
Septins are a family of GTPases which can polymerize to form filaments. Septins are involved in a variety of processes including cytokinesis and trafficking. (Adapted from FBrf0216213).
Protein Function (UniProtKB)
Involved in cytokinesis (Probable). May be involved in p53-dependent apoptosis (PubMed:17456438).
(UniProt, P42207)
Gene Model and Products
Number of Transcripts
1
Number of Unique Polypeptides
1

Please see the JBrowse view of Dmel\Septin1 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 P42207)

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
PDB - An information portal to biological macromolecular structures
Comments on Gene Model

Gene model reviewed during 5.53

Gene model reviewed during 5.48

Gene model reviewed during 5.55

Sequence Ontology: Class of Gene
Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0077198
2026
361
Additional Transcript Data and Comments
Reported size (kB)

2.1 (northern blot)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0076897
41.1
361
6.52
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)

Likely part of a multicomponent septin complex that includes pnut (PubMed:8590810). Interacts with pnut (PubMed:8590810). Interacts with park (PubMed:17456438).

(UniProt, P42207)
Post Translational Modification

Ubiquitinated by park, leading to its degradation by the proteasome.

(UniProt, P42207)
Crossreferences
PDB - An information portal to biological macromolecular structures
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\Septin1 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).

-0.17

Transcript Expression
Polypeptide Expression
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Evidence
References
located_in cleavage furrow
inferred from direct assay
colocalizes_with contractile ring
inferred from high throughput direct assay
inferred from direct assay
Expression Deduced from Reporters
Stage
Tissue/Position (including subcellular localization)
Reference
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\Septin1 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
  • Stages(s) 1-3
  • Stages(s) 4-6
  • Stages(s) 7-8
  • Stages(s) 9-10
  • Stages(s) 11-12
  • Stages(s) 13-16
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 4 )
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 Septin1
Transgenic constructs containing regulatory region of Septin1
Aberrations (Deficiencies and Duplications) ( 2 )
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) (15)
13 of 14
Yes
Yes
6 of 14
No
No
6 of 14
No
No
6 of 14
No
No
6 of 14
No
No
5 of 14
No
Yes
4 of 14
No
No
4 of 14
No
Yes
4 of 14
No
No
4 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
1 of 14
No
No
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) (16)
13 of 14
Yes
Yes
7 of 14
No
No
6 of 14
No
No
6 of 14
No
No
5 of 14
No
No
5 of 14
No
Yes
4 of 14
No
No
4 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
Yes
3 of 14
No
No
2 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
No
Mus musculus (laboratory mouse) (15)
12 of 14
Yes
Yes
6 of 14
No
No
6 of 14
No
No
6 of 14
No
No
6 of 14
No
No
5 of 14
No
Yes
4 of 14
No
Yes
4 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
Xenopus tropicalis (Western clawed frog) (16)
11 of 13
Yes
Yes
10 of 13
No
Yes
3 of 13
No
No
3 of 13
No
No
3 of 13
No
No
3 of 13
No
Yes
2 of 13
No
Yes
2 of 13
No
Yes
2 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
Danio rerio (Zebrafish) (18)
13 of 14
Yes
Yes
7 of 14
No
Yes
6 of 14
No
No
6 of 14
No
No
6 of 14
No
No
5 of 14
No
No
5 of 14
No
No
5 of 14
No
No
5 of 14
No
Yes
5 of 14
No
No
4 of 14
No
No
4 of 14
No
Yes
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
3 of 14
No
Yes
3 of 14
No
No
2 of 14
No
No
Caenorhabditis elegans (Nematode, roundworm) (3)
8 of 14
Yes
No
2 of 14
No
No
1 of 14
No
Yes
Anopheles gambiae (African malaria mosquito) (4)
12 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (3)
1 of 13
Yes
No
1 of 13
Yes
Yes
1 of 13
Yes
Yes
Saccharomyces cerevisiae (Brewer's yeast) (8)
7 of 13
Yes
No
7 of 13
Yes
Yes
5 of 13
No
Yes
4 of 13
No
Yes
4 of 13
No
Yes
4 of 13
No
Yes
4 of 13
No
Yes
1 of 13
No
No
Schizosaccharomyces pombe (Fission yeast) (7)
7 of 12
Yes
No
7 of 12
Yes
Yes
6 of 12
No
Yes
4 of 12
No
Yes
4 of 12
No
Yes
3 of 12
No
Yes
3 of 12
No
Yes
Escherichia coli (enterobacterium) (1)
1 of 11
Yes
Yes
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:Septin1. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (4)
9 of 13
7 of 13
6 of 13
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 ( 2 )
    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.
    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
    Show/hide secondary interactors 
    (data from AllianceMine provided by esyN)
    esyN Network Key:
    Suppression
    Enhancement
    Other 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)
    Likely part of a multicomponent septin complex that includes pnut (PubMed:8590810). Interacts with pnut (PubMed:8590810). Interacts with park (PubMed:17456438).
    (UniProt, P42207 )
    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
    External Data
    Linkouts
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    X
    Recombination map
    1-65
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    19F5-19F5
    Limits computationally determined from genome sequence between P{EP}CG1702EP1525 and P{EP}EP1465&P{EP}CG1486EP1192
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    19F4-19F5
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (7)
    Genomic Clones (11)
     

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

    cDNA Clones (117)
     

    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

          Shows particularly robust cycling of transcription in adult heads, as assessed by expression analysis using high density oligonucleotide arrays with probe generated during three 12-point time course experiments over the course of 6 days.

          A complex of septin polypeptides is isolated that bind and hydrolyse GTP and form filaments. Their high degree of conservation, ubiquitous expression and proven role in cytokinesis suggests septins are certain to be important players in regulating cell architecture and function. Septins alone can form regular filamentous polymers, since filament formation is likely to be central to their localisation and function.

          Sep1 localises to the leading edge of the cleavage furrows in dividing cells and in cellularising embryos. Sep1 is also concentrated in other locations that suggest additional roles unrelated to cytokinesis. Immunolocalisation and biochemical data suggest that Sep1 and pnut probably function as parts of a complex.

          Defined as a transcription unit discovered by Northern blots, in vicinity of slgA gene.

          Relationship to Other Genes
          Source for database merge of
          Additional comments
          Nomenclature History
          Source for database identify of

          Source for identity of: Sep1 CG1403

          Source for identity of: Septin1 Sep1

          Nomenclature comments

          Changed from 'Sep1' to 'Septin1' to prevent the symbol being auto-converted into a date when used in spreadsheet programs (see PMID:15214961, PMID: 27552985).

          Etymology
          Synonyms and Secondary IDs (18)
          Reported As
          Secondary FlyBase IDs
          • FBgn0005665
          • FBgn0013404
          • FBgn0014082
          • FBgn0024226
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          Study result (0)
          Result
          Result Type
          Title
          External Crossreferences and Linkouts ( 39 )
          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)
          PDB - An information portal to biological macromolecular structures
          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
          iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
          MIST (protein-protein) - An integrated Molecular Interaction Database
          References (125)