FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene: Dmel\spin
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General Information
Symbol
Dmel\spin
Species
D. melanogaster
Name
spinster
Annotation Symbol
CG8428
Feature Type
FlyBase ID
FBgn0086676
Gene Model Status
Stock Availability
Gene Summary
spinster (spin) encodes a conserved transmembrane protein and a putative late-endosomal/lysosomal efflux permease. It is essential for mTOR reactivation and lysosome reformation following prolonged starvation and for regulation of TGF-β/BMP pathways in motoneuron and eye development. [Date last reviewed: 2019-03-14] (FlyBase Gene Snapshot)
Also Known As

benchwarmer, l(2)10403, l(2)k09905, diphthong, bnch

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
2-77
RefSeq locus
NT_033778 REGION:16124981..16138238
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (24 terms)
Molecular Function (1 term)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
inferred from electronic annotation with InterPro:IPR011701, InterPro:IPR020846
inferred from biological aspect of ancestor with PANTHER:PTN000605425
inferred from sequence model
Biological Process (20 terms)
Terms Based on Experimental Evidence (17 terms)
CV Term
Evidence
References
inferred from mutant phenotype
involved_in endocytosis
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
involved_in locomotion
inferred from mutant phenotype
inferred from mutant phenotype
inferred from genetic interaction with FLYBASE:lqf; FB:FBgn0028582
inferred from genetic interaction with FLYBASE:dpp; FB:FBgn0000490
inferred from mutant phenotype
involved_in oogenesis
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
Terms Based on Predictions or Assertions (3 terms)
CV Term
Evidence
References
involved_in courtship behavior
non-traceable author statement
non-traceable author statement
inferred from sequence model
inferred from electronic annotation with InterPro:IPR011701
Cellular Component (3 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
inferred from direct assay
located_in vesicle
inferred from direct assay
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
is_active_in membrane
inferred from sequence model
inferred from biological aspect of ancestor with PANTHER:PTN000605425
Protein Family (UniProt)
Belongs to the major facilitator superfamily. Spinster (TC 2.A.1.49) family. (Q9GQQ0)
Summaries
Gene Snapshot
spinster (spin) encodes a conserved transmembrane protein and a putative late-endosomal/lysosomal efflux permease. It is essential for mTOR reactivation and lysosome reformation following prolonged starvation and for regulation of TGF-β/BMP pathways in motoneuron and eye development. [Date last reviewed: 2019-03-14]
Pathway (FlyBase)
NEGATIVE REGULATORS OF BMP SIGNALING PATHWAY -
Negative regulators of Bone Morphogenetic Protein (BMP) signaling down-regulate the pathway, ultimately resulting in the decreased nuclear activity of the Mad/Med transcription factor complex.
Gene Group (FlyBase)
SLC63 FAMILY OF SPHINGOSINE PHOSPHATE TRANSPORTERS -
Solute carrier family 63 (SLC63) members are sphingolipid transports involved in the transport of sphingosine-1-phosphate. (Adapted from PMID:21084291).
Protein Function (UniProtKB)
Probable sphingolipid transporter that plays a central role in endosomes and/or lysosomes storage. Involved in TGF-beta-mediated synaptic growth regulation both pre- and postsynaptically via its function in endosomal storage regulation. Also required during oogenesis by regulating yolk spheres storage.
(UniProt, Q9GQQ0)
Summary (Interactive Fly)

conserved transmembrane protein expressed in glia - mutants exhibit increased neural survival and altered sexual behavior - a putative lysosomal efflux permease with the hallmarks of a sugar transporter - essential for mTOR reactivation and lysosome reformation following prolonged starvation

Gene Model and Products
Number of Transcripts
5
Number of Unique Polypeptides
5

Please see the JBrowse view of Dmel\spin 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 Q9GQQ0)

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.

Variable use of small exon; supported combination results in frameshift and premature stop in downstream exon.

Gene model reviewed during 5.50

Alternative translation stop created by use of multiphasic reading frames within coding region.

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0089593
3007
605
FBtr0089592
3394
630
FBtr0089591
3198
605
FBtr0089590
3394
630
FBtr0089589
3132
402
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
FBpp0088552
65.8
605
6.69
FBpp0088551
68.6
630
6.60
FBpp0088550
66.1
605
6.69
FBpp0088549
68.3
630
6.60
FBpp0088548
44.5
402
8.16
Polypeptides with Identical Sequences

None of the polypeptides share 100% sequence identity.

Additional Polypeptide Data and Comments
Reported size (kDa)
Comments
External Data
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\spin 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).

-1.03

Transcript Expression
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
immunolocalization
Stage
Tissue/Position (including subcellular localization)
Reference
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

spin protein is detected ubiquitously in the larval eye disc, in vesicles within neurons and glial cells.

Marker for
 
Subcellular Localization
CV Term
Evidence
References
inferred from direct assay
located_in vesicle
inferred from direct assay
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\spin 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 ( 56 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 19 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of spin
Transgenic constructs containing regulatory region of spin
Aberrations (Deficiencies and Duplications) ( 7 )
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
Sterility
Allele
Other Phenotypes
Allele
Phenotype manifest in
Allele
adult central nervous system & abdominal segment
eye photoreceptor cell & late endosome | supernumerary | somatic clone
eye photoreceptor cell & secondary lysosome | supernumerary | somatic clone
lamina receptor cell & secondary lysosome | supernumerary | somatic clone
larval neuromuscular junction & synaptic vesicle (with spin11F5)
larval neuromuscular junction & synaptic vesicle (with spinE14.1)
larval neuromuscular junction & synaptic vesicle (with spinΔ2b)
monopolar laminar cell & secondary lysosome | supernumerary | somatic clone
nurse cell & nucleus
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (19)
14 of 14
Yes
Yes
1  
13 of 14
No
Yes
12 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
2  
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 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)
14 of 14
Yes
Yes
12 of 14
No
Yes
10 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Mus musculus (laboratory mouse) (17)
13 of 14
Yes
Yes
13 of 14
Yes
Yes
12 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Xenopus tropicalis (Western clawed frog) (15)
11 of 13
Yes
Yes
10 of 13
No
Yes
9 of 13
No
Yes
2 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
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
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
Danio rerio (Zebrafish) (21)
14 of 14
Yes
Yes
11 of 14
No
Yes
11 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Caenorhabditis elegans (Nematode, roundworm) (17)
14 of 14
Yes
Yes
14 of 14
Yes
Yes
14 of 14
Yes
Yes
13 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
Anopheles gambiae (African malaria mosquito) (11)
11 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (28)
13 of 13
Yes
Yes
13 of 13
Yes
Yes
13 of 13
Yes
Yes
3 of 13
No
Yes
3 of 13
No
Yes
3 of 13
No
Yes
3 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
Saccharomyces cerevisiae (Brewer's yeast) (26)
2 of 13
Yes
Yes
1 of 13
No
Yes
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
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
Yes
Schizosaccharomyces pombe (Fission yeast) (20)
2 of 12
Yes
Yes
2 of 12
Yes
Yes
2 of 12
Yes
Yes
2 of 12
Yes
Yes
2 of 12
Yes
Yes
2 of 12
Yes
Yes
2 of 12
Yes
Yes
2 of 12
Yes
Yes
2 of 12
Yes
Yes
1 of 12
No
Yes
1 of 12
No
No
1 of 12
No
Yes
1 of 12
No
Yes
1 of 12
No
Yes
1 of 12
No
Yes
1 of 12
No
Yes
1 of 12
No
No
1 of 12
No
No
1 of 12
No
Yes
1 of 12
No
Yes
Escherichia coli (enterobacterium) (12)
1 of 11
Yes
No
1 of 11
Yes
No
1 of 11
Yes
No
1 of 11
Yes
Yes
1 of 11
Yes
No
1 of 11
Yes
No
1 of 11
Yes
No
1 of 11
Yes
No
1 of 11
Yes
No
1 of 11
Yes
No
1 of 11
Yes
No
1 of 11
Yes
No
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:spin. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (12)
3 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
Human Disease Associations
FlyBase Human Disease Model Reports
Disease Ontology (DO) Annotations
Models Based on Experimental Evidence ( 3 )
Potential Models Based on Orthology ( 1 )
Modifiers Based on Experimental Evidence ( 2 )
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
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
Linkouts
BioGRID - A database of protein and genetic interactions.
DroID - A comprehensive database of gene and protein interactions.
MIST (genetic) - An integrated Molecular Interaction Database
Pathways
Signaling Pathways (FlyBase)
Metabolic Pathways
FlyBase
External Links
Reactome Metabolic Pathways - An open-source, open access, manually curated and peer-reviewed metabolic pathway database.
External Data
Linkouts
Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
Class of Gene
Genomic Location and Detailed Mapping Data
Chromosome (arm)
2R
Recombination map
2-77
Cytogenetic map
Sequence location
FlyBase Computed Cytological Location
Cytogenetic map
Evidence for location
52E6-52E7
Limits computationally determined from genome sequence between P{PZ}l(2)0507005070&P{EP}CG8414EP525 and P{EP}spinEP645&P{lacW}spink09905
Experimentally Determined Cytological Location
Cytogenetic map
Notes
References
52E5-52E6
(determined by in situ hybridisation) 52E5--8 (determined by in situ hybridisation)
52E-52E
(determined by in situ hybridisation)
52E1-52E7
52E5--6 52E7--8
Experimentally Determined Recombination Data
Location
Left of (cM)
Right of (cM)
Notes
Stocks and Reagents
Stocks (28)
Genomic Clones (15)
 

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

cDNA Clones (47)
 

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

    spin is required both pre- and post-synaptically for normal synaptic growth at the neuromuscular junction.

    Mutant females show strong rejection behaviour in response to male courtship. Mutants of both sexes show a decrease in viability and adult lifespan. Loss of spin gene function interferes with programmed cell death of neurons and nurse cells.

    Identification: In a genetic screen for components of the muscle to nerve trans-synaptic signaling system.

    spin may be a negative regulator of synaptic growth.

    Loss-of-function mutations lead to an overgrowth of the neuromuscular synapse (50-150% increase in bouton number). Synaptic function is normal despite the large increase in synapse size.

    Mutants isolated in a screen of the second chromosome identifying genes affecting disc morphology.

    Identification: Enhancer trap screen designed to discover genes involved in the cellular aspects of defense mechanisms, as well as in melanotic tumor formation processes linked to blood cell disregulation.

    Mating behaviour of spin mutant females is studied.

    bnch is an essential locus involved in PNS development.

    Relationship to Other Genes
    Source for database merge of

    Source for merge of: spin diphthong

    Source for merge of: spin l(2)10403 l(2)k09905

    Source for merge of: spin bnch l(2)W5

    Source for merge of: spin CG8428

    Additional comments

    Source for merge of spin CG8428 was sequence comparison ( date:010104 ).

    Nomenclature History
    Source for database identify of
    Nomenclature comments

    Some people may find "spinster" objectionable as a fly gene name because it is associated with a negative female stereotype.

    Etymology

    The name 'benchwarmer' refers to the overall lower level of locomotor activity displayed by mutant adult escapers and honors athletes who play rarely and therefore sit on the bench.

    Synonyms and Secondary IDs (16)
    Reported As
    Symbol Synonym
    l(2)W5
    l(2)k02511
    Secondary FlyBase IDs
    • FBgn0004571
    • FBgn0014134
    • FBgn0028602
    • FBgn0010657
    • FBgn0015991
    • FBgn0021981
    • FBgn0034078
    • FBgn0061174
    Datasets (0)
    Study focus (0)
    Experimental Role
    Project
    Project Type
    Title
    Study result (0)
    Result
    Result Type
    Title
    External Crossreferences and Linkouts ( 75 )
    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 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
    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)
    Interactive Fly - A cyberspace guide to Drosophila development and metazoan evolution
    MIST (genetic) - An integrated Molecular Interaction Database
    Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
    Reactome Metabolic Pathways - An open-source, open access, manually curated and peer-reviewed metabolic pathway database.
    References (196)