A Database of Drosophila Genes & Genomes

FB2008_07, released August 8, 2008
 

Gene Dmel\Hsp70Aa

General Information
SymbolDmel\Hsp70AaSpeciesD. melanogaster
NameHeat-shock-protein-70AaAnnotation symbolCG31366
Feature typeprotein_coding_geneFlyBase IDFBgn0013275
Created / Updated2003-12-01/2003-12-01
Genomic Location
Chromosome (arm)3RRecombination map
Cytogenetic map87A2-87A2Sequence location3R:7,779,885..7,782,514 [-]
Map ( GBrowse ) detailed view
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Automatically generated summary

See sections below for more information
The gene Heat-shock-protein-70Aa is referred to in FlyBase by the symbol Hsp70Aa (CG31366, FBgn0013275). It has the cytological map location 87A2. Its sequence location is 3R:7779885..7782514. Its molecular function is described as ATP binding. It is involved in the biological processes: heat shock-mediated polytene chromosome puffing; response to heat. 5 alleles are reported. No phenotypic data is available. It has one annotated transcript and one annotated polypeptide.

hide Phenotypic Description from the Red Book (Lindsley & Zimm 1992)
Gene/Allele symbols may differ from current usage
Hsp70
The structural genes that code for the 70,000 dalton heat-shock protein (HSP70), the most abundant of the heat-shock proteins. HSP70 returns to preshock levels more rapidly than other heat-shock proteins following return to 25 (DiDomenico, Bugaisky, and Lindquist, 1982, Proc. Nat. Acad. Sci. USA 79: 6181-85). The protein becomes concentrated in nuclei during heat shock; disperses to cytoplasm during recovery; returns to nucleus upon further heat shock (Velazquez and Lindquist, 1984, Cell 36: 655-62). Appears not to be expressed in the testis in response to heat-shock stimulation (Bonner, Parks, Parker-Thornberg, Mortin, and Pelham, 1984, Cell 37: 979-91). Deletion of either the 87A7 or the 87C1 sequences does not eliminate the HSP70 heat-shock response; simultaneous deletion of both sequences does eliminate the HSP70 heat-shock response (Ish-Horowitz et al., 1979).
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FlyBase Computed Cytological Location
Cytogenetic map
Evidence for location
87A2-87A2  
Limits computationally determined from genome sequence between P{EP}Lk6EP886 and P{PZ}svp07842  
Experimentally Determined Cytological Location
Cytogenetic map
Notes
References
87A7-87A7
(determined by in situ hybridisation)  
87A-87A
(determined by in situ hybridisation)  
87A-87A
(determined by in situ hybridisation)  
87A7-87A7
(determined by in situ hybridisation)  
87A7-87A7
(determined by in situ hybridisation)  
87A-87A
(determined by in situ hybridisation)  
Experimentally Determined Recombination Data
Location
Left of (cM)
Right of (cM)
Notes
Molecular Map Data
Gene Order (in direction of increasing cytology)
References
In direction of increasing cytology: Hsp70Aa- Hsp70Ab+
Gene Order (overall orientation not stated)
References
Overall orientation not stated: Hsp70Aa- Hsp70Ab+
hide Gene Model & Products
Please see the GBrowse view of Dmel\Hsp70Aa for information on other features
detailed view FBtr0082480 FBtr0082479 FBtr0082481 FBtr0082512 FBtr0082482 FBpp0081953 FBpp0081955 FBpp0081954 FBpp0081986 FBpp0081956 FBti0078347 FBti0036133 FBti0027394 FBti0038975 FBti0072368 FBti0066195 FBti0044085 FBti0025170
Comments on Gene Model
this is Hsp70Aa; CG18743 (on + strand) is Hsp70Ab. (see Leigh Brown and Ish-Horowicz, 1981, Nature 290:677-682; Bettencourt and Feder 2001, Mol. Biol. Evol. 18:1272-1282; Bettencourt and Feder, 2002, J. Mol. Evol. 54:569-586).
hide Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Associated CDS (aa)
FBtr0082512
  2630
  642
Additional Transcript Data & Comments
Reported size (kB)
2.55 (northern blot)
Comments
External Data
Crossreferences
hide Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kD)
Length (aa)
Theoretical pI
RefSeq ID
GenBank protein
FBpp0081986  
70.2  
642  
5.49  
Additional Polypeptide Data & Comments
Reported size (kD)
Comments
External Data
Linkouts
PANTHER - Protein classification by function, families, and pathways
Crossreferences
InterPro domains - A database of protein families, domains, and functional sites
TRANSFAC - Eukaryotic transcription factors, their genomic binding sites, and DNA-binding profiles
  • R00751
  • R00752
  • R00754
  • R00755
hide Sequences Consistent with the Gene Model
DDBJ /
EMBL /
GenBank
DNA sequence
Protein sequence
Name
 
 
 
UniProtKB/Swiss-Prot
UniProtKB/TrEMBL
Maps to
Does NOT map to
Identified with
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Please see GBrowse or insertion reports for information on insertions of transgenic constructs and features not listed here
Type
Symbol & Location
Additional Notes
References
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Linkouts
DEDB - Drosophila exon database: splicing graphs
Crossreferences
hide Expression Data
FlyBase-Curated Data
Transcript and
Protein data
Please see the FlyBase Gene Expression Report for details of gene expression from the literature.
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Stage
Tissue/Position
Reference
Marker for
    Subcellular Localization
    CV Term
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    Stage
    Tissue/Position
    Reference
    Marker for
      Subcellular Localization
      CV Term
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      hide Alleles & Phenotypes
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      Lethality
      Allele
      Sterility
      Allele
      Phenotype manifest in
      Allele
      hide Classical Alleles ( 3 )
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      Allele of Hsp70AaClassMutagenStocksKnown lesion
      Hsp70AaDG161041 --
      Hsp70AaEY099531 --
      Hsp70AaSze-130 Yes
      hide Alleles Carried on Transgenic Constructs ( 2 )
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      Allele of Hsp70AaClassMutagenStocksKnown lesion
      Hsp70AacKa0 Yes
      Hsp70Aarand0 Yes
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      Useful deficiency
      Useful duplication
      Disrupted in
      Not disrupted in
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      Transgenic Constructs
      Type of construct
      Name
      Expression data
      characterization construct
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      Type of insertions
      Name
      Expression data
      miscellaneous insertions
      hide Related Comments
      Please look at the allele reports for the complete phenotype data
      One of five structural genes (in two clusters, Hsp70A and Hsp70B) that code for the 70,000 dalton heat-shock protein (HSP70), the most abundant of the heat-shock proteins. Hsp70A usually includes two HSP70 encoding genes (Hsp70Aa (proximal), Hsp70Ab (distal)) (Holmgren et al., 1979) with slightly different restriction maps (Artavanis-Tsakonas et al., 1978). HSP70 returns to preshock levels more rapidly than other heat-shock proteins following return to 25oC (DiDomenico, Bugaisky and Lindquist, 1982). The protein becomes concentrated in nuclei during heat shock; disperses to cytoplasm during recovery; returns to nucleus upon further heat shock (Velazquez and Lindquist, 1984). Appears not to be expressed in the testis in response to heat-shock stimulation (Bonner et al., 1984). Deletion of either Hsp70A or Hsp70B does not eliminate the HSP70 heat-shock response; simultaneous deletion of both does (Ish-Horowicz et al., 1979).
       
      The effect of aging on the expression of the "Hsp70" genes (Hsp70Aa, Hsp70Ab, Hsp70Ba, Hsp70Bb and Hsp70Bc) has been studied.
      The Hsp70A promoter is unsuitable for use in fusion gene constructs for long term expression studies where repeated heat shocks are required as the amount of RNA is substantially reduced.
      Probes from D.melanogaster used in chromosome in situ hybridisation to study response to heat shock in D.guanche, D.madeirensis and D.subobscura. Results suggest that the 18C, 94A, 89A and 27A loci of the three obscura group species are homologous to the D.melanogaster loci Hsp83, Hsp70A, Hsp68 and the small Hsp group Hsp22, Hsp23, Hsp26 and Hsp27 respectively.
      Psoralen cross-linking studies reveal that the Hsp70A and 18S rRNA DNA is wound with a significant level of superhelical tension irrespective of state of transcriptional activation. Conversely DNA flanking Hsp70A shows substantially less tension, indicating stable, torsionally stressed topological domains. Thus the relaxing activity of topoisomerases is not ubiquitous throughout the nucleus but is tightly regulated.
      Identified in 2D gels of CMW W2 wing imaginal disc cell proteins.
      Members of the hsc70 gene family (heat shock cognate genes) that reside within the same intracellular compartment in different organisms share greater amino acid identity than hsc70 proteins from the same organism but different organelles. This pattern of conservation indicates specialisation of hsc70 function.
      RNA polymerase distribution on uninduced Hsp70 genes has been compared with the distribution of RNA polymerase on DRB (5,6,-Dichloro-1-β-D-ribofuranosylbenzimidazole)-inhibited induced Hsp70 genes.
      Heat shock alters the distribution of Top2 in the 87A7 heat shock locus. scs and scs' are targets for Top2 localisation. A return to normal temperatures relocalises Top2.
      Introduction of Trl protein during or after nucleosome assembly in vitro results in disruption of nucleosome structure at the Hsp70Aa promoter. Hsp70Aa promoter deletion analysis reveals that disruption of a preassembled nucleosome requires three or four GA/CT elements, nucleosome displacement requires at least two GA/CT elements. The disruption is characterised by hypersensitivity to DNase I digestion and a realignment of adjacent nucleosomes. Disruption is facilitated by the presence of hydrolysable ATP.
      Activation of Hsp70Aa is a multistep process. RNA polymerase II is engaged, release of the polymerase and start of transcription requires the binding of heat shock transcription factors (HSF), whose binding is in turn conditional on binding of Trl.
      The Hsp70Aa and Hsp70Ab loci are flanked by special chromatin structures, scs and scs'. Each structure is defined by a pair of nuclease hypersensitivity sites bordering a nuclease resistant core of 250-350bp in length. Both scs and scs' have properties that suggest they may correspond to the boundaries of the 87A7 chromomere. scs and scs' are capable of establishing a domain of independent gene activity: w gene flanked by scs and scs' inserted into the genome by P element mediated transformation is isolated against both positive and negative position effects at most insertion sites. scs and scs' also have enhancer blocking activities: when inserted between a Yp1 enhancer and a heat shock promoter-Ecol\lacZ fusion little or no Ecol\lacZ expression is detected even though the promoter is fully heat shock inducible.
      The transcription of heat shock proteins, except Hsp83, is independent of the p200 subunit of initiation factor eIF-4F, eIF-4G.
      Synthesis of heat shock proteins is inhibited by both short-chain fatty acids and their corresponding alcohols, compounds which have no observable effect on histone acetylation.
      UV cross linking technique has been used to study the in vivo distribution of Trl protein on Hsp70 and Hsp26. Prior to heat shock Trl protein is associated with the promoter regions of the uninduced Hsp70 and Hsp26 genes. Upon heat shock induction Trl protein is recruited to their transcription units with its distribution coincident with that of RNA polymerase II.
      RNA levels do not increase with age, so the observed increase in protein levels is due to post-transcriptional regulation. Aging-specific expression may be a result of oxidative damage.
      Gene contains an RNA polymerase II complex which pauses after synthesis of a short transcript. In vivo ultraviolet crosslinking techniques demonstrate phosphorylation of the carboxy terminal domain (CTD) of the large subunit of RNA polymerase II could either regulate the transition of polymerase from a paused to an elongated complex or be a consequence of the transition from paused to elongated.
      Sodium salicylate induces activation of Hsf binding activity in salivary gland cells and Schneider SL2 tissue cells. Puffing of heat shock gene loci occurs in salivary glands but Hsp70 transcription is not induced suggesting puffing and transcription are separable events.
      d(GA.TC)n sequences can be found in the promoters of Hsp26 and the Hsp70 genes. In vitro assembly of mononucleosomes into short DNA fragments carrying d(GA.TC)n sequences of different lengths is very efficient. Nucleosome assembly is inhibited strongly when the d(GA.TC)n sequence forms a triple-stranded conformation. Triplex formation requires partial destabilisation of the nucleosome. Results indicate nucleosome assembly and triplex formation are competing processes.
      Flies with no copies of the Hsp70 genes (Hsp70Aa, Hsp70Ab, Hsp70Ba, Hsp70Bb, Hsp70Bbb and Hsp70Bc) are viable and fertile.
      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.
      hide Gene Ontology: Function, Process & Cellular Component ( 3 )
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      CV term
      References
      inferred from electronic annotation with InterPro:IPR001023
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      CV term
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      inferred from mutant phenotype
      inferred from mutant phenotype
      non-traceable author statement
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      Interacts with
      Please look at the allele data for full details of the genetic interactions
      Hsp70Aa allele
      Gene
      References
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      BioGRID - Interaction data, including yeast 2-hybrid and genetic interactions
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      Genome-wide drosophilid orthologs
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      Produces phenotype in
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      Bloomington
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      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 GBrowse for alignment of the cDNAs and ESTs to the gene model.
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