FB2025_02 , released April 17, 2025
Gene: Dmel\Act42A
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General Information
Symbol
Dmel\Act42A
Species
D. melanogaster
Name
Actin 42A
Annotation Symbol
CG12051
Feature Type
FlyBase ID
FBgn0000043
Gene Model Status
Stock Availability
Gene Summary
Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells. Multiple isoforms are involved in various cellular functions such as cytoskeleton structure, cell mobility, chromosome movement and muscle contraction. (UniProt, P02572)
Contribute a Gene Snapshot for this gene.
Also Known As

actin, F-actin, BAP47, Act42, C

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
2-55
RefSeq locus
NT_033778 REGION:6013910..6015689
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (4 terms)
Molecular Function (0 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (0 terms)
Biological Process (2 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
inferred from expression pattern
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN002631617
Cellular Component (2 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
inferred from direct assay
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
is_active_in actin cytoskeleton
inferred from biological aspect of ancestor with PANTHER:PTN002631484
Protein Family (UniProt)
Belongs to the actin family. (P02572)
Summaries
Gene Group (FlyBase)
ACTINS -
Actins are highly conserved eukaryotic filament-forming proteins that are major components of the cytoskeleton. Actin polymerisation is controlled by ATP binding and hydrolysis. Actins are involved in various cell processes including cell movement, muscle contraction, cell trafficking and mechanical support. (Adapted from PMID:21859859).
BRAHMA ASSOCIATED PROTEINS COMPLEX -
The Brahma associated proteins (BAP) complex is an ATP-dependent chromatin remodeling complex. (Adapted from FBrf0192510.)
POLYBROMO-CONTAINING BRAHMA ASSOCIATED PROTEINS COMPLEX -
Brahma (BRM) complexes are ATP-dependent chromatin remodeling complexes. The Polybromo-containing Brahma associated proteins (PBAP) complex is distinguished by the presence of polybromo and Bap170 subunits. (Adapted from FBrf0192510.)
Protein Function (UniProtKB)
Actins are highly conserved proteins that are involved in various types of cell motility and are ubiquitously expressed in all eukaryotic cells. Multiple isoforms are involved in various cellular functions such as cytoskeleton structure, cell mobility, chromosome movement and muscle contraction.
(UniProt, P02572)
Phenotypic Description (Red Book; Lindsley and Zimm 1992)
Act42A
Codes for cytoplasmic actin; transcribed throughout development; one of two actin genes transcribed in Kc cells and several other cell lines (Fyrberg, Mahaffy, Bond, and Davidson, 1983, Cell 33: 115-23). One of three actin genes expressed in the wing disc during wing development, each with its characteristic profile. Peak expression at 44h of pupal age, little or no expression at 60h rising again at 80h. 44h peak corresponds to time of maximum change in cell shape (Peterson, Bond, Mitchell, and Davidson, 1985, Dev. Genet. 5: 219-25).
Gene Model and Products
Number of Transcripts
1
Number of Unique Polypeptides
1

Please see the JBrowse view of Dmel\Act42A 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 P02572)

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 5.47

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0086029
1626
376
Additional Transcript Data and Comments
Reported size (kB)

1.72 (northern blot)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0085365
41.8
376
5.16
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
Post Translational Modification

N-terminal cleavage of acetylated cysteine of immature actin by ACTMAP.

Oxidation of Met-45 by Mical to form methionine sulfoxide promotes actin filament depolymerization. Methionine sulfoxide is produced stereospecifically, but it is not known whether the (S)-S-oxide or the (R)-S-oxide is produced.

(UniProt, P02572)
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\Act42A 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).

0.65

Transcript Expression
No Assay Recorded
Stage
Tissue/Position (including subcellular localization)
Reference
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

Act42A transcripts are most abundant in embryos. They are evenly distributed in preblastoderm embryos, becoming localized to the periphery at blastoderm formation. Later they are observed in the brain and ventral nerve cord as well as in the developing gonad, proventriculus, and midgut.

Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
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\Act42A 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
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 ( 4 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 12 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Act42A
Transgenic constructs containing regulatory region of Act42A
Aberrations (Deficiencies and Duplications) ( 1 )
Inferred from experimentation ( 1 )
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) (43)
10 of 14
Yes
No
5  
10 of 14
Yes
No
1  
7 of 14
No
Yes
7 of 14
No
Yes
7 of 14
No
Yes
1  
6 of 14
No
Yes
6 of 14
No
No
5 of 14
No
Yes
4 of 14
No
No
1  
4 of 14
No
No
1  
4 of 14
No
No
4 of 14
No
No
4 of 14
No
Yes
4 of 14
No
Yes
3 of 14
No
No
2  
3 of 14
No
No
1  
3 of 14
No
Yes
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
1  
3 of 14
No
No
1  
3 of 14
No
No
1  
3 of 14
No
No
3 of 14
No
No
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
No
No
3 of 14
No
Yes
3 of 14
No
Yes
3 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
1 of 14
No
No
1 of 14
No
Yes
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (31)
11 of 14
Yes
No
10 of 14
No
No
10 of 14
No
Yes
7 of 14
No
Yes
7 of 14
No
Yes
7 of 14
No
Yes
7 of 14
No
No
6 of 14
No
Yes
4 of 14
No
No
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
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
3 of 14
No
No
3 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
Mus musculus (laboratory mouse) (29)
11 of 14
Yes
No
11 of 14
Yes
No
7 of 14
No
Yes
7 of 14
No
Yes
7 of 14
No
Yes
7 of 14
No
Yes
7 of 14
No
No
4 of 14
No
Yes
4 of 14
No
No
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
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
3 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
Xenopus tropicalis (Western clawed frog) (15)
9 of 13
Yes
No
9 of 13
Yes
No
5 of 13
No
Yes
5 of 13
No
Yes
5 of 13
No
Yes
4 of 13
No
Yes
3 of 13
No
No
2 of 13
No
No
2 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) (23)
11 of 14
Yes
No
11 of 14
Yes
No
7 of 14
No
Yes
7 of 14
No
Yes
7 of 14
No
Yes
7 of 14
No
Yes
7 of 14
No
No
6 of 14
No
No
6 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
3 of 14
No
No
3 of 14
No
No
3 of 14
No
No
2 of 14
No
Yes
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Caenorhabditis elegans (Nematode, roundworm) (12)
11 of 14
Yes
No
11 of 14
Yes
No
11 of 14
Yes
No
10 of 14
No
No
9 of 14
No
Yes
3 of 14
No
No
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
Anopheles gambiae (African malaria mosquito) (14)
5 of 12
No
No
Arabidopsis thaliana (thale-cress) (20)
12 of 13
Yes
No
12 of 13
Yes
Yes
12 of 13
Yes
No
12 of 13
Yes
Yes
11 of 13
No
No
11 of 13
No
No
11 of 13
No
No
11 of 13
No
No
6 of 13
No
Yes
5 of 13
No
Yes
5 of 13
No
Yes
4 of 13
No
No
4 of 13
No
Yes
3 of 13
No
No
3 of 13
No
Yes
3 of 13
No
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
No
1 of 13
No
No
Saccharomyces cerevisiae (Brewer's yeast) (10)
12 of 13
Yes
No
0  
3 of 13
No
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
Yes
2 of 13
No
No
1 of 13
No
No
1 of 13
No
No
Schizosaccharomyces pombe (Fission yeast) (11)
11 of 12
Yes
No
3 of 12
No
No
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
2 of 12
No
No
1 of 12
No
No
1 of 12
No
No
1 of 12
No
Yes
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:Act42A. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (14)
12 of 13
11 of 13
11 of 13
11 of 13
11 of 13
6 of 13
5 of 13
5 of 13
5 of 13
5 of 13
4 of 13
4 of 13
4 of 13
3 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 ( 11 )
    Modifiers Based on Experimental Evidence ( 2 )
    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?
    Hsap\LOC100288966
    3 of 14
        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

        Please see the Physical Interaction reports below for full details
        protein-protein
        Physical Interaction
        Assay
        References
        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
        MIST (protein-protein) - An integrated Molecular Interaction Database
        Pathways
        Signaling Pathways (FlyBase)
        Metabolic Pathways
        FlyBase
        External Links
        External Data
        Linkouts
        KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
        SignaLink - A signaling pathway resource with multi-layered regulatory networks.
        Class of Gene
        Genomic Location and Detailed Mapping Data
        Chromosome (arm)
        2R
        Recombination map
        2-55
        Cytogenetic map
        Sequence location
        FlyBase Computed Cytological Location
        Cytogenetic map
        Evidence for location
        42A7-42A7
        Limits computationally determined from genome sequence between P{PZ}l(2)0985109851&P{lacW}Src42Ak10108 and P{lacW}l(2)k09848k09848&P{EP}EP407
        Experimentally Determined Cytological Location
        Cytogenetic map
        Notes
        References
        42A-42A
        (determined by in situ hybridisation)
        Experimentally Determined Recombination Data
        Location
        Left of (cM)
        Right of (cM)
        Notes
        Stocks and Reagents
        Stocks (8)
        Genomic Clones (23)
        cDNA Clones (147)
         

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

              S2 cells treated with dsRNA generated against this gene show reduced phagocytosis of Candida albicans compared to untreated cells.

              dsRNA directed against this gene causes defects in cytokinesis when tested in an RNAi screen in S2 cells.

              In a sample of 79 genes with multiple introns, 33 showed significant heterogeneity in G+C content among introns of the same gene and significant positive correspondence between the intron and the third codon position G+C content within genes. These results are consistent with selection adding against preferred codons at the start of genes.

              Age related changes in Act42A expression have been studied by Northern analysis.

              Ecdysteroid-regulated gene.

              Sequence analysis demonstrates insect muscle actins form a distinct family of closely related proteins significantly diverged from cytoplasmic actins.

              Translation of actin RNA in early embryos injected with initiation factors has been studied.

              The expression of HIS-C genes during oogenesis has been studied, and compared to periods of DNA synthesis and actin expression during this developmental stage.

              Codes for cytoplasmic actin; transcribed throughout development; one of two actin genes transcribed in Kc cells and several other cell lines (FBrf0038990). One of three actin genes expressed in the wing disc during wing development, each with its characteristic profile. Peak expression at 44h of pupal age, little or no expression at 60h rising again at 80h. 44h peak corresponds to time of maximum change in cell shape (FBrf0042391). Transcription increased 6-8 fold by 20-OH-ecdysone in tissue culture cells (FBrf0047102; FBrf0064343).

              Relationship to Other Genes
              Source for database merge of
              Additional comments

              The Act42A gene may be derived from the Act79B gene by retroposition.

              Nomenclature History
              Source for database identify of
              Nomenclature comments
              Etymology
              Synonyms and Secondary IDs (27)
              Reported As
              Symbol Synonym
              AFFX-Dros-ACTIN_M_r_at
              Secondary FlyBase IDs
                Datasets (0)
                Study focus (0)
                Experimental Role
                Project
                Project Type
                Title
                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
                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
                Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
                Flygut - An atlas of the Drosophila adult midgut
                KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
                MIST (genetic) - An integrated Molecular Interaction Database
                MIST (protein-protein) - An integrated Molecular Interaction Database
                SignaLink - A signaling pathway resource with multi-layered regulatory networks.
                References (314)