FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
Gene: Dmel\Hsp70Bbb
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General Information
Symbol
Dmel\Hsp70Bbb
Species
D. melanogaster
Name
Heat shock protein 70 Bbb
Annotation Symbol
CG5834
Feature Type
FlyBase ID
FBgn0051354
Gene Model Status
Stock Availability
Gene Summary
Hsp70Bbb (Hsp70Bbb) encodes a protein involved in response to heat shock and hypoxia. [Date last reviewed: 2019-08-01] (FlyBase Gene Snapshot)
Also Known As

Hsp70, hsp70B, heat-shock protein 70

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
3-52
RefSeq locus
NT_033777 REGION:12502510..12504856
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (13 terms)
Molecular Function (5 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (5 terms)
CV Term
Evidence
References
enables ATP binding
inferred from electronic annotation with InterPro:IPR013126
inferred from biological aspect of ancestor with PANTHER:PTN000452648
inferred from electronic annotation with InterPro:IPR013126
inferred from sequence or structural similarity with UniProtKB:P11147
inferred from biological aspect of ancestor with PANTHER:PTN000452648
inferred from biological aspect of ancestor with PANTHER:PTN000452648
Biological Process (4 terms)
Terms Based on Experimental Evidence (3 terms)
CV Term
Evidence
References
involved_in response to heat
inferred from mutant phenotype
inferred from expression pattern
inferred from mutant phenotype
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
involved_in protein refolding
inferred from biological aspect of ancestor with PANTHER:PTN000452648
Cellular Component (4 terms)
Terms Based on Experimental Evidence (0 terms)
Terms Based on Predictions or Assertions (4 terms)
CV Term
Evidence
References
is_active_in cytoplasm
inferred from biological aspect of ancestor with PANTHER:PTN002321897
is_active_in cytosol
inferred from biological aspect of ancestor with PANTHER:PTN002500132
is_active_in nucleus
inferred from biological aspect of ancestor with PANTHER:PTN002500132
is_active_in plasma membrane
inferred from biological aspect of ancestor with PANTHER:PTN002500132
Gene Group (FlyBase)
Protein Family (UniProt)
Belongs to the heat shock protein 70 family. (Q9VG58)
Catalytic Activity (EC/Rhea)
ATP hydrolysis activity
RHEA 13065:
Summaries
Gene Snapshot
Hsp70Bbb (Hsp70Bbb) encodes a protein involved in response to heat shock and hypoxia. [Date last reviewed: 2019-08-01]
Gene Group (FlyBase)
HEAT SHOCK PROTEIN 70 CHAPERONES -
The Heat Shock Protein 70 (Hsp70) superfamily of chaperones assist in numerous folding processes and are upregulated by heat stress and toxic chemicals. Hsp70 chaperones share a highly conserved bipartite domain structure composed of an ATPase domain and a substrate-binding domain. (Adapted from PMID:17441502, FBrf0232269 and FBrf0174945).
Protein Function (UniProtKB)
Stress-response chaperone protein that prevents toxic aggregation of proteins.
(UniProt, Q9VG58)
Gene Model and Products
Number of Transcripts
1
Number of Unique Polypeptides
1

Please see the JBrowse view of Dmel\Hsp70Bbb 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 Q9VG58)

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

This duplication of the Hsp70Bb gene is present in certain strains including y; cn bw sp, which was sequenced in the Drosophila genome project, but not others. See FBrf0137034 and personal communication of Brian Bettencourt to FlyBase for details.

Gene model reviewed during 5.50

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0082636
2347
641
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
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
Subunit Structure (UniProtKB)

Forms a complex with Hsp83/Hsp90 and Dpit47.

(UniProt, Q9VG58)
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\Hsp70Bbb using the Feature Mapper tool.

External Data
Crossreferences
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).

-0.47

Transcript Expression
Additional Descriptive Data
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
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\Hsp70Bbb 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
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 1 )
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 Hsp70Bbb
Transgenic constructs containing regulatory region of Hsp70Bbb
Aberrations (Deficiencies and Duplications) ( 2 )
Variants
Variant Molecular Consequences
Alleles Representing Disease-Implicated Variants
Phenotypes
For more details about a specific phenotype click on the relevant allele symbol.
Other Phenotypes
Allele
Phenotype manifest in
Allele
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (21)
8 of 14
Yes
Yes
4  
8 of 14
Yes
Yes
7 of 14
No
No
11  
6 of 14
No
No
1  
6 of 14
No
No
1  
6 of 14
No
No
6 of 14
No
No
1  
4 of 14
No
No
8  
3 of 14
No
Yes
2 of 14
No
No
2  
2 of 14
No
No
2  
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
1  
2 of 14
No
No
1  
1 of 14
No
Yes
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
Yes
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) (19)
7 of 14
Yes
Yes
7 of 14
Yes
No
6 of 14
No
No
6 of 14
No
No
6 of 14
No
No
6 of 14
No
No
4 of 14
No
No
4 of 14
No
No
4 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
Yes
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
Mus musculus (laboratory mouse) (18)
8 of 14
Yes
Yes
7 of 14
No
No
7 of 14
No
No
6 of 14
No
No
6 of 14
No
No
5 of 14
No
No
4 of 14
No
No
3 of 14
No
Yes
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Xenopus tropicalis (Western clawed frog) (17)
6 of 13
Yes
No
5 of 13
No
Yes
4 of 13
No
No
4 of 13
No
No
3 of 13
No
No
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
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
Danio rerio (Zebrafish) (25)
7 of 14
Yes
No
7 of 14
Yes
No
7 of 14
Yes
No
0  
6 of 14
No
No
6 of 14
No
No
6 of 14
No
No
6 of 14
No
No
5 of 14
No
No
5 of 14
No
No
4 of 14
No
No
3 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
Yes
1 of 14
No
Yes
Caenorhabditis elegans (Nematode, roundworm) (13)
7 of 14
Yes
No
6 of 14
No
Yes
6 of 14
No
Yes
6 of 14
No
No
6 of 14
No
No
6 of 14
No
Yes
4 of 14
No
No
3 of 14
No
Yes
2 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Anopheles gambiae (African malaria mosquito) (12)
6 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (21)
7 of 13
Yes
No
6 of 13
No
No
6 of 13
No
No
6 of 13
No
No
6 of 13
No
No
6 of 13
No
No
6 of 13
No
No
6 of 13
No
No
6 of 13
No
No
4 of 13
No
No
4 of 13
No
No
4 of 13
No
No
4 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
No
2 of 13
No
No
1 of 13
No
No
1 of 13
No
No
Saccharomyces cerevisiae (Brewer's yeast) (14)
7 of 13
Yes
No
7 of 13
Yes
No
6 of 13
No
No
6 of 13
No
No
5 of 13
No
No
5 of 13
No
Yes
5 of 13
No
Yes
3 of 13
No
No
3 of 13
No
No
3 of 13
No
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
No
2 of 13
No
Yes
Schizosaccharomyces pombe (Fission yeast) (8)
5 of 12
Yes
No
5 of 12
Yes
No
5 of 12
Yes
No
4 of 12
No
Yes
2 of 12
No
No
2 of 12
No
No
2 of 12
No
Yes
2 of 12
No
No
Escherichia coli (enterobacterium) (4)
3 of 11
Yes
No
3 of 11
Yes
Yes
2 of 11
No
No
2 of 11
No
No
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:Hsp70Bbb. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (15)
9 of 13
9 of 13
9 of 13
9 of 13
8 of 13
8 of 13
8 of 13
8 of 13
8 of 13
7 of 13
6 of 13
4 of 13
3 of 13
3 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
    Interaction Browsers

    Please see the Physical Interaction reports below for full details
    protein-protein
    Physical Interaction
    Assay
    References
    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
    Subunit Structure (UniProtKB)
    Forms a complex with Hsp83/Hsp90 and Dpit47.
    (UniProt, Q9VG58 )
    Linkouts
    BioGRID - A database of protein and genetic interactions.
    DroID - A comprehensive database of gene and protein interactions.
    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.
    Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    3R
    Recombination map
    3-52
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    87B14-87B14
    Limits computationally determined from genome sequence between P{PZ}svp07842 and P{lacW}Vha55j2E9
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (6)
    Genomic Clones (13)
     

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

    cDNA Clones (61)
     

    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

        Flies with no copies of the Hsp70 genes (Hsp70Aa, Hsp70Ab, Hsp70Ba, Hsp70Bb, Hsp70Bbb and Hsp70Bc) are unable to survive a severe heat shock. These flies show a lengthened heat-shock response and developmental delay following a non-lethal heat shock.

        Flies with no copies of the Hsp70 genes (Hsp70Aa, Hsp70Ab, Hsp70Ba, Hsp70Bb, Hsp70Bbb and Hsp70Bc) are viable and fertile.

        Some Drosophila strains, including that sequenced in the Drosophila genome project have three, not two, tandemly repeated Hsp70 genes at 87C1 (in addition to a reverse orientation Hsp70 gene, Hsp70Ba, approximately 40kb upstream). The distal-most gene of the three tandem copies is Hsp70Bc. The inner two tandem copies are Hsp70Bb and Hsp70Bbb.

        The D.melanogaster strain used for sequencing the genome contains an additional, third tandem copy of an Hsp70 gene at 87C as well as the two tandemly repeated copies (Hsp70Bb and Hsp70Bc) which are found in many strains. This additional copy is named "Hsp70Bbb" (see FBrf0137034 and Bettencourt, 2002.1.16, personal communication to FlyBase).

        Relationship to Other Genes
        Source for database merge of
        Member gene of
        Additional comments
        Nomenclature History
        Source for database identify of
        Nomenclature comments
        Etymology
        Synonyms and Secondary IDs (22)
        Reported As
        Symbol Synonym
        HSP70cA5
        Hsp70
        (Pegoraro et al., 2022, Prasad et al., 2019, Berson et al., 2017, Li et al., 2017, Donovan and Marr, 2016, Hosamani et al., 2016, Zatsepina et al., 2016, Zhang et al., 2016, Alaraby et al., 2015, Funikov et al., 2015, Marr et al., 2014, Shukla et al., 2014, Tower et al., 2014, Zhang et al., 2014, Calabria et al., 2012, Schneiderman et al., 2012, Azad et al., 2011, Morettini et al., 2011, Takahashi et al., 2011, Ahamed et al., 2010, Bartkowiak et al., 2010, Demontis and Perrimon, 2010, Hrizo and Palladino, 2010, Jensen et al., 2010, Kwon et al., 2010, Tian et al., 2010, Udaka et al., 2010, Zobeck et al., 2010, Zobeck et al., 2010, Ardehali et al., 2009, Baker and Russell, 2009, Chopra et al., 2009, Posgai et al., 2009, Bhargav et al., 2008, Brandt and Corces, 2008, Cai et al., 2008, Casas-Tinto et al., 2008, Cobreros et al., 2008, Duncan, 2008, Fujikake et al., 2008, Gilchrist et al., 2008, Hanyu-Nakamura et al., 2008, Ni et al., 2008, Smith et al., 2008, Ahrens et al., 2007, Eissenberg et al., 2007, Fernandez-Funez et al., 2007, Mito et al., 2007, Pappas et al., 2007, Rezaval et al., 2007, Yao et al., 2007, Behr et al., 2006, Kalosaka et al., 2006, Papaconstantinou et al., 2006, Sengupta and Lakhotia, 2006, Shilova et al., 2006, Tenney et al., 2006, Auluck et al., 2005, Duncan, 2005, Gupta et al., 2005, Huen and Chan, 2005, Iijima-Ando et al., 2005, Newman et al., 2005, Nielsen et al., 2005, Overgaard et al., 2005, Scholz et al., 2005, Ahmed and Duncan, 2004, Jennings et al., 2004, Morrow et al., 2004, Sathyanarayanan et al., 2004, Temme et al., 2004, Auluck and Bonini, 2003, Caletka and Fry, 2003, Canamasas et al., 2003, Gruntenko et al., 2003, Jin et al., 2003, Kristensen et al., 2003, Norry and Loeschcke, 2003, Rutherford, 2003, Sejerkilde et al., 2003, Bonini, 2002, Isaenko et al., 2002, Lakhotia et al., 2002, Kelty and Lee, 2001, Krebs and Holbrook, 2001, Rajendra et al., 2001, Sorensen and Loeschcke, 2001, Zatsepina et al., 2001, Bettencourt and Feder, 1999, Krebs, 1999, Lerman and Feder, 1999)
        hsp70Bb-prime
        hsp70bbb
        Name Synonyms
        70 kDa heat shock protein, cytosolic A 5
        Heat shock protein 70 Bbb
        heat shock protein 70
        Secondary FlyBase IDs
        • FBgn0040549
        Datasets (0)
        Study focus (0)
        Experimental Role
        Project
        Project Type
        Title
        Study result (0)
        Result
        Result Type
        Title
        External Crossreferences and Linkouts ( 35 )
        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.
        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
        FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
        FlyCyc Genes - Genes from a BioCyc PGDB for Dmel
        FlyMet - A comprehensive tissue-specific metabolomics resource for Drosophila.
        iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
        KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
        MIST (protein-protein) - An integrated Molecular Interaction Database
        Reactome - An open-source, open access, manually curated and peer-reviewed pathway database.
        References (279)