FB2026_02 , released June 18, 2026
Gene: Dmel\Acp29AB
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General Information
Symbol
Dmel\Acp29AB
Species
D. melanogaster
Name
Accessory gland protein 29AB
Annotation Symbol
CG17797
Feature Type
FlyBase ID
FBgn0015583
Gene Model Status
Stock Availability
Gene Summary
Accessory gland protein 29AB (Acp29AB) encodes a predicted C-type lectin that is produced by the male accessory glands and transferred to females during mating. After transfer to mated females, the Acp29AB product is detected in sperm storage organs and in the hemolymph. It plays a role in retention of sperm in storage and sperm competition. [Date last reviewed: 2018-09-20] (FlyBase Gene Snapshot)
Also Known As

Accessory gland-specific peptide 29AB, Acp29B

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
2-32
RefSeq locus
NT_033779 REGION:8392456..8393222
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (7 terms)
Molecular Function (2 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
inferred from sequence or structural similarity
inferred from sequence or structural similarity with FLYBASE:Lectin-galC1; FB:FBgn0016675
inferred from sequence or structural similarity
Biological Process (4 terms)
Terms Based on Experimental Evidence (4 terms)
CV Term
Evidence
References
involved_in insemination
inferred from high throughput expression pattern
involved_in mating
inferred from high throughput expression pattern
involved_in sperm competition
inferred from mutant phenotype
involved_in sperm storage
inferred from mutant phenotype
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
involved_in sperm competition
traceable author statement
Cellular Component (1 term)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
inferred from high throughput direct assay
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
inferred from sequence model
Gene Group (FlyBase)
Protein Family (UniProt)
-
Summaries
Gene Snapshot
Accessory gland protein 29AB (Acp29AB) encodes a predicted C-type lectin that is produced by the male accessory glands and transferred to females during mating. After transfer to mated females, the Acp29AB product is detected in sperm storage organs and in the hemolymph. It plays a role in retention of sperm in storage and sperm competition. [Date last reviewed: 2018-09-20]
Gene Group (FlyBase)
C-TYPE LECTIN-LIKE -
C-type lectins are Ca2+-dependent carbohydrate-binding proteins. They possess a C-type lectin fold, that is also present in proteins that do not bind carbohydrates. (Adapted from PMID:20301263.)
Protein Function (UniProtKB)
Responsible for physiological and behavioral changes in mated female flies.
(UniProt, O46197)
Gene Model and Products
Number of Transcripts
1
Number of Unique Polypeptides
1

Please see the JBrowse view of Dmel\Acp29AB 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 O46197)

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)
FBtr0079716
767
234
Additional Transcript Data and Comments
Reported size (kB)

0.95 (northern blot)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0079321
27.2
234
7.96
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
Crossreferences
InterPro - A database of protein families, domains and functional sites
Linkouts
Sequences Consistent with the Gene Model
Nucleotide / Polypeptide Records
 
Mapped Features

Click to get a list of regulatory features (enhancers, TFBS, etc.) and gene disruptions (point mutations, indels, etc.) within or overlapping Dmel\Acp29AB 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).

-0.05

Transcript Expression
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

Expressed at high levels in male accessory gland main cells; not clear if transcript is expressed in secondary cells.

Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
western blot
Stage
Tissue/Position (including subcellular localization)
Reference
spermatheca

Comment: in mated female, transferred from male

hemolymph

Comment: in mated female, transferred from male

Additional Descriptive Data

Acp29AB is absent from the reproductive tracts of virgin females and females 5 min ASM (after the start of mating), but is transferred to the female reproductive tract by 7 min ASM. Acp29AB localizes to the spermathecum 1 hour after mating and is also detectable in the hemolymph of the mated female.

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

JBrowse - Visual display of RNA-Seq signals

View Dmel\Acp29AB 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 ( 43 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 5 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Acp29AB
Transgenic constructs containing regulatory region of Acp29AB
Aberrations (Deficiencies and Duplications) ( 0 )
Inferred from experimentation ( 0 )
Inferred from location ( 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) (55)
3 of 14
Yes
Yes
3 of 14
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No
2 of 14
No
No
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Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (74)
4 of 14
Yes
Yes
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
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No
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Yes
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Yes
1 of 14
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1 of 14
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No
Mus musculus (laboratory mouse) (70)
3 of 14
Yes
Yes
3 of 14
Yes
No
2 of 14
No
No
2 of 14
No
No
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Yes
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No
Xenopus tropicalis (Western clawed frog) (28)
2 of 13
Yes
Yes
2 of 13
Yes
No
2 of 13
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No
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No
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1 of 13
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Yes
1 of 13
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No
1 of 13
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No
1 of 13
No
No
1 of 13
No
No
Danio rerio (Zebrafish) (106)
3 of 14
Yes
No
3 of 14
Yes
No
3 of 14
Yes
No
3 of 14
Yes
No
3 of 14
Yes
No
3 of 14
Yes
No
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No
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Yes
2 of 14
No
Yes
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1 of 14
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Yes
1 of 14
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No
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No
1 of 14
No
No
1 of 14
No
No
Caenorhabditis elegans (Nematode, roundworm) (39)
3 of 14
Yes
No
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
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No
1 of 14
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Yes
1 of 14
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No
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Yes
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Yes
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Yes
1 of 14
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Yes
1 of 14
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Yes
1 of 14
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No
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No
1 of 14
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Yes
1 of 14
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Yes
1 of 14
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Yes
1 of 14
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Yes
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Yes
1 of 14
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1 of 14
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Yes
1 of 14
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Yes
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No
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Yes
1 of 14
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Yes
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Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
Anopheles gambiae (African malaria mosquito) (23)
3 of 12
Yes
Yes
3 of 12
Yes
Yes
2 of 12
No
Yes
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
1 of 12
No
Yes
1 of 12
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No
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No
1 of 12
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No
1 of 12
No
No
1 of 12
No
No
1 of 12
No
No
1 of 12
No
No
1 of 12
No
No
Arabidopsis thaliana (thale-cress) (0)
Saccharomyces cerevisiae (Brewer's yeast) (0)
Schizosaccharomyces pombe (Fission yeast) (0)
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:Acp29AB. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (31)
9 of 13
8 of 13
8 of 13
7 of 13
7 of 13
7 of 13
7 of 13
7 of 13
6 of 13
6 of 13
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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 ( 1 )
    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
    Interaction Browsers
    Summary of Genetic Interactions
    Interaction Browsers
    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.
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    FlyBase
    External Data
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    2L
    Recombination map
    2-32
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    29C1-29C1
    Limits computationally determined from genome sequence between P{lacW}l(2)k12914k12914&P{lacW}Akap200k07118a and P{lacW}l(2)k03706k03706&P{lacW}Acerk07704
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    29A-29B
    (determined by in situ hybridisation)
    29B-29B
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (5)
    Genomic Clones (17)
     

    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
         
        Cell Line Information
        Publicly Available Cell Lines
         
          Other Stable Cell Lines
           
            Other Comments

            Acp29AB is required for the normal maintenance of sperm in storage.

            Isolated in a screen for seminal fluid proteins.

            Gene is identified in a differential cDNA hybridisation screen.

            If females remate frequently relative to the duration of sperm storage and rate of sperm use, sperm displacement may be an important component of male reproductive success. Significant association has been found between Acp29AB mutant male sperm and the ability to resist displacement by subsequent sperm. There is no correlation between the ability to displace resident sperm and the ability to resist being displaced by subsequent sperm, this lack of correlation suggests that different mechanisms mediate that the two components of sperm displacement.

            May promote replacement of sperm already stored by a female.

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

            Source for identity of: Acp29AB CG17797

            Nomenclature comments
            Etymology
            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 ( 210 )
            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.
            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
            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
            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
            References (84)