FB2025_01 , released February 20, 2025
Gene: Dmel\Hem
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General Information
Symbol
Dmel\Hem
Species
D. melanogaster
Name
HEM-protein
Annotation Symbol
CG5837
Feature Type
FlyBase ID
FBgn0011771
Gene Model Status
Stock Availability
Gene Summary
HEM-protein (Hem) encodes a component of the WAVE Regulatory Complex. Hem product regulates processes such as neuronal migration and asymmetric division of neural precursors by inhibiting the product of SCAR degradation. In the asymmetric process, the Hem-pathway indirectly maintains proper localization of proteins such as those encoded by insc and numb. [Date last reviewed: 2019-03-21] (FlyBase Gene Snapshot)
Also Known As

kette, Nap1, kte, Kette/Nap1, dhem

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
3-47
RefSeq locus
NT_037436 REGION:22284354..22288195
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 (1 term)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (0 terms)
Biological Process (16 terms)
Terms Based on Experimental Evidence (13 terms)
CV Term
Evidence
References
inferred from mutant phenotype
involved_in axonogenesis
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
involved_in myoblast fusion
inferred from mutant phenotype
inferred from mutant phenotype
involved_in neuron migration
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
inferred from direct assay
Terms Based on Predictions or Assertions (5 terms)
CV Term
Evidence
References
involved_in cell migration
inferred from biological aspect of ancestor with PANTHER:PTN000250293
involved_in cell morphogenesis
inferred from biological aspect of ancestor with PANTHER:PTN000250293
inferred from biological aspect of ancestor with PANTHER:PTN000250293
inferred from biological aspect of ancestor with PANTHER:PTN000250293
inferred from biological aspect of ancestor with PANTHER:PTN000949598
Cellular Component (2 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
inferred from mutant phenotype
inferred from direct assay
part_of SCAR complex
inferred from physical interaction with FLYBASE:SCAR; FB:FBgn0041781
inferred from direct assay
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
part_of SCAR complex
inferred from biological aspect of ancestor with PANTHER:PTN000250293
Gene Group (FlyBase)
Protein Family (UniProt)
Belongs to the HEM-1/HEM-2 family. (P55162)
Protein Signatures (InterPro)
Summaries
Gene Snapshot
HEM-protein (Hem) encodes a component of the WAVE Regulatory Complex. Hem product regulates processes such as neuronal migration and asymmetric division of neural precursors by inhibiting the product of SCAR degradation. In the asymmetric process, the Hem-pathway indirectly maintains proper localization of proteins such as those encoded by insc and numb. [Date last reviewed: 2019-03-21]
Gene Group (FlyBase)
WAVE REGULATORY COMPLEX -
The WAVE Regulatory Complex (WRC) is a multi-subunit complex that controls actin cytoskeletal dynamics. WRC activates the Arp2/3-mediated actin nucleation. WRC contains the nucleation-promoting factor SCAR, a member of the WASP family. (Adapted from FBrf0208042 and FBrf0224564).
Protein Function (UniProtKB)
Plays a role during growth of the oocyte.
(UniProt, P55162)
Summary (Interactive Fly)

alternatively a membrane associated and a cytosolic protein that transduces information to the neuronal cytoskeleton affecting axon guidance - Kette/Nap1/Hem-2 coordinates myoblast junction dissolution and the Scar-WASp ratio during myoblast fusion

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

Please see the JBrowse view of Dmel\Hem 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 P55162)

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)
FBtr0078510
3777
1126
Additional Transcript Data and Comments
Reported size (kB)

3.8 (northern blot)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0078162
129.4
1126
6.80
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)

1126 (aa); 129 (kD predicted)

Comments

Antibody was raised against the peptide RHNDNPPLLKNKGC

External Data
Subunit Structure (UniProtKB)

Component of the WAVE complex composed of Hem/Kette, Scar/Wave and Cyfip where it binds directly to the C-terminus of Cyfip.

(UniProt, P55162)
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\Hem 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).

-1.17

Transcript Expression
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
organism

Comment: maternally deposited

northern blot
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

In Northern blots, Hem transcript is detected throughout development, with higher levels in the early embryo, in early first larval instar, and in adults. The expression detected in adults is likely due to ovarian accumulation. Hem transcript is observed in oogenesis and embryogenesis using in situ hybridization. In stage 10 oocytes, the follicle cell and the oocyte express Hem. Hem is ubiquitous in the early embryo. At embryonic stages 7-10, the presumptive procephalic neuroblasts express Hem. Expression is once again ubiquitous in stage 13 embryos. At stage 14, expression is strongest in the pharynx, supraoesophageal ganglion, and the ventral nerve cord. In stage 17 embryos, transcript is detected only in the brain and ventral cord. This pattern persists in the early larval stages.

Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
immunolocalization
Stage
Tissue/Position (including subcellular localization)
Reference
S2 cell-line

Comment: expression assayed in cultured S2 cells

S2 cell-line

Comment: expression assayed in cultured S2 cells

S2 cell-line

Comment: expression assayed in cultured S2 cells

muscle cell

Comment: expression assayed in cultured muscle cells

neuron
axon & dendrite

Comment: expression assayed in cultured neurons

mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
western blot
Stage
Tissue/Position (including subcellular localization)
Reference
cell

Comment: expression assayed in cultured S2 cells

Additional Descriptive Data

Hem protein is present in longitudinal connectives and commissures during the establishment of the axonal network.

Marker for
Subcellular Localization
CV Term
Evidence
References
inferred from mutant phenotype
inferred from direct assay
part_of SCAR complex
inferred from physical interaction with FLYBASE:SCAR; FB:FBgn0041781
inferred from direct assay
Expression Deduced from Reporters
Reporter: P{PZ}Hem03335
Stage
Tissue/Position (including subcellular localization)
Reference
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\Hem 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 ( 9 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 13 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Hem
Transgenic constructs containing regulatory region of Hem
Aberrations (Deficiencies and Duplications) ( 4 )
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
Other Phenotypes
Allele
Phenotype manifest in
Allele
adult head & macrochaeta (with HemJ4-48)
adult head & macrochaeta (with HemΔ2-6)
cytoskeleton & ectoderm
cytoskeleton & embryonic central nervous system
cytoskeleton & embryonic epidermis | dorsal
cytoskeleton & mesoderm
larval neuromuscular junction & bouton, with Scer\GAL4elav-C155
larval neuromuscular junction & bouton (with HemJ4-48)
larval neuromuscular junction & bouton (with HemΔ2-6)
neuromuscular junction & synapse
neuromuscular junction & synapse (with HemJ1-70)
neuromuscular junction & synapse (with HemΔ2-6)
photoreceptor cell & axon
thecogen cell & actin filament & pupa, with Scer\GAL4sca-537.4
ventral midline & neuron
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (2)
14 of 14
Yes
Yes
10 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) (2)
14 of 14
Yes
Yes
11 of 14
No
Yes
Mus musculus (laboratory mouse) (2)
13 of 14
Yes
Yes
11 of 14
No
Yes
Xenopus tropicalis (Western clawed frog) (4)
11 of 13
Yes
Yes
8 of 13
No
Yes
1 of 13
No
Yes
1 of 13
No
No
Danio rerio (Zebrafish) (2)
14 of 14
Yes
Yes
10 of 14
No
Yes
Caenorhabditis elegans (Nematode, roundworm) (1)
14 of 14
Yes
Yes
Anopheles gambiae (African malaria mosquito) (1)
11 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (1)
12 of 13
Yes
Yes
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:Hem. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Human Disease Associations
FlyBase Human Disease Model Reports
    Disease Ontology (DO) Annotations
    Models Based on Experimental Evidence ( 2 )
    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.
    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
    suppressible
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    External Data
    Subunit Structure (UniProtKB)
    Component of the WAVE complex composed of Hem/Kette, Scar/Wave and Cyfip where it binds directly to the C-terminus of Cyfip.
    (UniProt, P55162 )
    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
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    3L
    Recombination map
    3-47
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    79D4-79D4
    Limits computationally determined from genome sequence between P{lacW}l(3)j1B10j1B10 and P{lacW}l(3)j2C4j2C4
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    79E1-79E2
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (7)
    Genomic Clones (8)
     

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

    cDNA Clones (73)
     

    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

          In the context of myoblast fusion, Hem functions as a positive regulator of the localization and stability of SCAR.

          Hem antagonizes WASp function during myoblast fusion.

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

          Hem is necessary for the second round of somatic myoblast fusion in the embryo.

          dsRNA made from templates generated with primers directed against this gene is tested in an RNAi screen for effects on actin-based lamella formation.

          Hem is required for the normal projection of the VUM axons. Hem affects the organisation of the cytoskeleton.

          Five EMS induced alleles were identified in a screen for mutations affecting commissure formation in the CNS of the embryo.

          Identification: Part of molecular analysis of the Ten-m genomic region.

          Hem has been cloned and sequenced, and its expression pattern has been analysed.

          Relationship to Other Genes
          Source for database merge of

          Source for merge of: Hem kte

          Additional comments
          Nomenclature History
          Source for database identify of

          Source for identity of: Hem CG5837

          Nomenclature comments
          Etymology

          "kette" means "chain" in German.

          Synonyms and Secondary IDs (17)
          Reported As
          Symbol Synonym
          l(3)03335
          Secondary FlyBase IDs
          • FBgn0010794
          • FBgn0026230
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          Study result (0)
          Result
          Result Type
          Title
          External Crossreferences and Linkouts ( 43 )
          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
          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
          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
          MIST (protein-protein) - An integrated Molecular Interaction Database
          References (145)