FB2024_04 , released June 25, 2024
Gene: Dmel\Hk
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General Information
Symbol
Dmel\Hk
Species
D. melanogaster
Name
Hyperkinetic
Annotation Symbol
CG43388
Feature Type
FlyBase ID
FBgn0263220
Gene Model Status
Stock Availability
Gene Summary
Hyperkinetic (Hk) encodes a beta-subunit of Sh K[+] channels and modulates its channel function. It is important in regulating action potentials in neurons and muscles, and transmitter release. [Date last reviewed: 2019-03-07] (FlyBase Gene Snapshot)
Also Known As

Dm_X:51771 , lincRNA.975

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
1-31
RefSeq locus
NC_004354 REGION:10233347..10263485
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (11 terms)
Molecular Function (5 terms)
Terms Based on Experimental Evidence (3 terms)
CV Term
Evidence
References
inferred from mutant phenotype
inferred from physical interaction with FLYBASE:eag; FB:FBgn0000535
Terms Based on Predictions or Assertions (4 terms)
CV Term
Evidence
References
inferred from sequence or structural similarity with UniProtKB:P63144
inferred from biological aspect of ancestor with PANTHER:PTN002455295
Biological Process (4 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
inferred from electronic annotation with InterPro:IPR005983
Cellular Component (2 terms)
Terms Based on Experimental Evidence (1 term)
CV Term
Evidence
References
inferred from physical interaction with FLYBASE:Sh; FB:FBgn0003380
inferred from physical interaction with FLYBASE:eag; FB:FBgn0000535
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
located_in cytoplasm
inferred from electronic annotation with InterPro:IPR005983
Protein Family (UniProt)
-
Summaries
Gene Snapshot
Hyperkinetic (Hk) encodes a beta-subunit of Sh K[+] channels and modulates its channel function. It is important in regulating action potentials in neurons and muscles, and transmitter release. [Date last reviewed: 2019-03-07]
Gene Group (FlyBase)
VOLTAGE-GATED POTASSIUM CHANNEL - BETA SUBUNITS -
Voltage-gated potassium β subunits can associate with and regulate voltage-gated potassium channels. (Adapted from FBrf0224790).
UNCLASSIFIED ALDO-KETO REDUCTASES -
This group comprises aldo-keto reductases that do not classify under other groups in FlyBase.
Phenotypic Description (Red Book; Lindsley and Zimm 1992)
Hk: Hyperkinetic (J.C. Hall)
Isolated as a dominant allele that induces ether-induced leg shaking in flies (Kaplan and Trout, 1969); later, hyperkinetic alleles showed recessive behavior, both in regard to the adult leg shaking phenotype and to the larval electrophysiological phenotype (Stern and Ganetzky, 1989). The vigorous leg shaking of flies can be induced by nitrogen or triethylamine, as well as ether, but not by chloroform (Ganetzky and Wu, 1982, Genetics 100: 597-614); ether also induces rhythmic bursts of impulses in certain cells of the thoracic ganglia of adults (summarized by Ikeda and Kaplan, 1974). The "patch clamp" experiments on neurons from Hk larvae reveals inward currents of unusually high conductance (Sun and Wu, 1985, Neurosci. Abstr. 11: 787). In Hk larvae, the amplitude and duration of the post synaptic response to a brief high frequency nerve stimulation is increased up to the level characteristic of Sh mutants (Stern and Ganetzky, 1989). Shadow stimuli induce jump response, which maps to the head in mosaic experiment (Kaplan, 1979). Hk can overcome heat-induced paralytic effects of parats (i.e. stobe light stimuli to the double mutant elicit jumps). Hk-induced leg shaking suppresseds by napts at its relatively low permissive temperature (Ganetsky and Wu, 1982). Courtship performed by Hk males is abnormal (Burnet, Eastwood, and Connolly, 1974, Behav. Genet. 4: 227-35). Lifespan is shorter than normal and rate of oxygen consumption is greater than normal in Hk (Trout and Kaplan, 1970, Exper. Geront. 5: 83-93). Mutant focus of life-shortening effect maps to ventral anterior part of thorax as does leg shaking (Trout and Kaplan, 1982). Mutant shows weak orientation to spots in Y-maze test (Bulthoff, 1982, Biol. Cybernet 45: 63-7).
Summary (Interactive Fly)

cytoplasmic protein that acts as the β subunit and redox sensor of Shaker voltage-dependent K+ channels - functional in neural pathway in arousal and circadian rhythms - interacts with Ether go-go channels

Gene Model and Products
Number of Transcripts
9
Number of Unique Polypeptides
8

Please see the JBrowse view of Dmel\Hk 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 M9PHI0)

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 5.51

Gene model reviewed during 5.44

Gene model reviewed during 5.55

Gene model reviewed during 6.01

Multiphase exon postulated: reading frame of first coding exon differs in alternative transcripts.

Double stop-codon suppression (UGA, UGA) postulated; FBrf0216884.

Annotated transcripts do not represent all supported alternative splices within 5' UTR.

Gene model reviewed during 5.48

Tissue-specific extension of 3' UTRs observed during later stages (FBrf0218523, FBrf0219848); all variants may not be annotated

Sequence Ontology: Class of Gene
Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0307876
4046
392
FBtr0307877
3548
547
FBtr0307878
3788
698
FBtr0307879
7021
392
FBtr0307880
3916
374
FBtr0307881
3536
393
FBtr0331336
8450
548
FBtr0331337
3548
596
FBtr0331338
3548
887
Additional Transcript Data and Comments
Reported size (kB)

~9 (northern blot)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0300310
44.0
392
8.05
FBpp0300311
59.7
547
6.24
FBpp0300312
78.0
698
8.53
FBpp0300313
44.0
392
8.05
FBpp0300314
42.0
374
8.54
FBpp0300315
44.1
393
7.88
FBpp0303754
59.7
548
6.24
FBpp0303755
64.6
596
5.62
FBpp0303756
95.4
887
7.10
Polypeptides with Identical Sequences

The group(s) of polypeptides indicated below share identical sequence to each other.

392 aa isoforms: Hk-PD, Hk-PG
Additional Polypeptide Data and Comments
Reported size (kDa)

546 (aa); 60 (kD predicted)

Comments
External Data
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\Hk 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).

-0.73

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

Eye-enriched transcripts determined by ratio of expression level in wild-type heads. versus expression level in so heads.

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 physical interaction with FLYBASE:Sh; FB:FBgn0003380
inferred from physical interaction with FLYBASE:eag; FB:FBgn0000535
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\Hk 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
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 17 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 10 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of Hk
Transgenic constructs containing regulatory region of Hk
Aberrations (Deficiencies and Duplications) ( 7 )
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) (15)
9 of 14
Yes
Yes
2  
8 of 14
No
Yes
2  
7 of 14
No
Yes
2  
3 of 14
No
No
3 of 14
No
No
2 of 14
No
No
1  
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
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) (17)
8 of 14
Yes
Yes
8 of 14
Yes
Yes
7 of 14
No
Yes
2 of 14
No
No
2 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) (16)
9 of 14
Yes
Yes
8 of 14
No
Yes
7 of 14
No
Yes
2 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
Xenopus tropicalis (Western clawed frog) (8)
7 of 13
Yes
Yes
5 of 13
No
No
5 of 13
No
Yes
4 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
Danio rerio (Zebrafish) (5)
8 of 14
Yes
Yes
7 of 14
No
Yes
7 of 14
No
Yes
7 of 14
No
Yes
2 of 14
No
Yes
Caenorhabditis elegans (Nematode, roundworm) (14)
2 of 14
Yes
No
2 of 14
Yes
No
2 of 14
Yes
No
2 of 14
Yes
No
2 of 14
Yes
No
2 of 14
Yes
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
Anopheles gambiae (African malaria mosquito) (13)
4 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (21)
9 of 13
Yes
Yes
3 of 13
No
Yes
3 of 13
No
Yes
2 of 13
No
Yes
2 of 13
No
Yes
2 of 13
No
Yes
2 of 13
No
Yes
2 of 13
No
Yes
2 of 13
No
Yes
2 of 13
No
No
2 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
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
Saccharomyces cerevisiae (Brewer's yeast) (14)
5 of 13
Yes
Yes
3 of 13
No
Yes
3 of 13
No
Yes
3 of 13
No
Yes
3 of 13
No
Yes
2 of 13
No
Yes
2 of 13
No
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
Yes
1 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
Schizosaccharomyces pombe (Fission yeast) (8)
9 of 12
Yes
Yes
3 of 12
No
Yes
3 of 12
No
Yes
1 of 12
No
Yes
1 of 12
No
Yes
1 of 12
No
No
1 of 12
No
Yes
1 of 12
No
Yes
Escherichia coli (enterobacterium) (5)
7 of 11
Yes
Yes
5 of 11
No
Yes
3 of 11
No
No
2 of 11
No
Yes
1 of 11
No
Yes
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:Hk. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (11)
4 of 13
4 of 13
2 of 13
2 of 13
2 of 13
2 of 13
2 of 13
2 of 13
2 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 ( 0 )
    Allele
    Disease
    Evidence
    References
    Potential Models Based on Orthology ( 0 )
    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
    RNA-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
    Linkouts
    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
    Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    X
    Recombination map
    1-31
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    9B4-9B5
    ; Limits computationally determined from genome sequence between P{EP}nejEP1149&P{EP}nejEP1179 and P{EP}α-Man-IEP1628&P{EP}α-Man-IEP1307
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    Experimentally Determined Recombination Data
    Location

    1-30.4 +/- 0.6

    1-30.5

    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (48)
    Genomic Clones (23)
    cDNA Clones (32)
     

    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
      RNAi and Array Information
      Linkouts
      Antibody Information
      Laboratory Generated Antibodies
       
      Commercially Available Antibodies
       
      Cell Line Information
      Publicly Available Cell Lines
       
        Other Stable Cell Lines
         
          Other Comments

          Duplicate transcripts identified and eliminated during the migration of annotations from the release 5 genome assembly to the release 6 assembly.

          New annotation (CG34319) in release 5.2 of the genome annotation.

          RNAi generated by PCR using primers directed to this gene causes a cell growth and viability phenotype when assayed in Kc167 and S2R+ cells.

          Mutants are hypersensitive to paraquat.

          Immunoprecipitation experiments reveal Hk can associate with eag α subunits.

          Alteration of the rate of aging and life span using Sh and Hk hyperactive mutants shows that the timing of type I Ecol\lacZ2216 expression is independent of metabolic rate.

          Hk β subunit modulates a wide range of the Sh K+ current properties, inducing its amplitude, activation and inactivation, temperature dependence and drug sensitivity. Modulation is thought to occur via hydrophobic interactions, Hk β subunits modulate Sh channel formation in the cytoplasmic pore region.

          Hk encodes a K+ channel β subunit with distinctive effects on Sh channel function and Hk is a member of the aldo-keto reductase superfamily.

          The entire adult temporal pattern of expression of an enhancer trap element, P{lacW}1085, scales to life span in Hk1 and Sh5 mutants.

          Relationship to Other Genes
          Source for database merge of

          Source for merge of: Hk CG17779

          Source for merge of: Hk CG34319

          Additional comments

          Annotations CG32688 and CG34319 merged as CG43388 in release 5.37 of the genome annotation.

          Annotations CG17779 and CG2287 merged as CG32688 in release 3 of the genome annotation.

          Additional γ ray-induced alleles have been isolated by K. Schlimgen on the basis of their failure to complement the leg shaking of Hk1 (FBrf0050361).

          Nomenclature History
          Source for database identify of
          Nomenclature comments
          Etymology
          Synonyms and Secondary IDs (14)
          Reported As
          Symbol Synonym
          CG2287
          Secondary FlyBase IDs
          • FBgn0001203
          • FBgn0030188
          • FBgn0052688
          • FBgn0085348
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          Study result (0)
          Result
          Result Type
          Title
          External Crossreferences and Linkouts ( 183 )
          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/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
          KEGG Genes - Molecular building blocks of life in the genomic space.
          MARRVEL_MODEL - MARRVEL (model organism gene)
          Linkouts
          Drosophila Genomics Resource Center - Drosophila Genomics Resource Center (DGRC) cDNA clones
          DroID - A comprehensive database of gene and protein interactions.
          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
          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 (protein-protein) - An integrated Molecular Interaction Database
          Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
          References (193)