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http://purl.uniprot.org/citations/19464326http://www.w3.org/1999/02/22-rdf-syntax-ns#typehttp://purl.uniprot.org/core/Journal_Citation
http://purl.uniprot.org/citations/19464326http://www.w3.org/1999/02/22-rdf-syntax-ns#typehttp://purl.uniprot.org/core/Journal_Citation
http://purl.uniprot.org/citations/19464326http://www.w3.org/2000/01/rdf-schema#comment"

Background

The HSPB family is one of the more diverse families within the group of HSP families. Some members have chaperone-like activities and/or play a role in cytoskeletal stabilization. Some members also show a dynamic, stress-induced translocation to SC35 splicing speckles. If and how these features are interrelated and if they are shared by all members are yet unknown.

Methods

Tissue expression data and interaction and co-regulated gene expression data of the human HSPB members was analyzed using bioinformatics. Using a gene expression library, sub-cellular distribution of the diverse members was analyzed by confocal microscopy. Chaperone activity was measured using a cellular luciferase refolding assay.

Results

Online databases did not accurately predict the sub-cellular distribution of all the HSPB members. A novel and non-predicted finding was that HSPB7 constitutively localized to SC35 splicing speckles, driven by its N-terminus. Unlike HSPB1 and HSPB5, that chaperoned heat unfolded substrates and kept them folding competent, HSPB7 did not support refolding.

Conclusion

Our data suggest a non-chaperone-like role of HSPB7 at SC35 speckles.

General significance

The functional divergence between HSPB members seems larger than previously expected and also includes non-canonical members lacking classical chaperone-like functions."xsd:string
http://purl.uniprot.org/citations/19464326http://purl.org/dc/terms/identifier"doi:10.1016/j.bbamcr.2009.05.005"xsd:string
http://purl.uniprot.org/citations/19464326http://purl.org/dc/terms/identifier"doi:10.1016/j.bbamcr.2009.05.005"xsd:string
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/author"Kampinga H.H."xsd:string
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/author"Kampinga H.H."xsd:string
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/author"Kanon B."xsd:string
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/author"Kanon B."xsd:string
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/author"Vos M.J."xsd:string
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/author"Vos M.J."xsd:string
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/date"2009"xsd:gYear
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/date"2009"xsd:gYear
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/name"Biochim. Biophys. Acta"xsd:string
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/name"Biochim. Biophys. Acta"xsd:string
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/pages"1343-1353"xsd:string
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/pages"1343-1353"xsd:string
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/title"HSPB7 is a SC35 speckle resident small heat shock protein."xsd:string
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/title"HSPB7 is a SC35 speckle resident small heat shock protein."xsd:string
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/volume"1793"xsd:string
http://purl.uniprot.org/citations/19464326http://purl.uniprot.org/core/volume"1793"xsd:string
http://purl.uniprot.org/citations/19464326http://www.w3.org/2004/02/skos/core#exactMatchhttp://purl.uniprot.org/pubmed/19464326
http://purl.uniprot.org/citations/19464326http://www.w3.org/2004/02/skos/core#exactMatchhttp://purl.uniprot.org/pubmed/19464326
http://purl.uniprot.org/citations/19464326http://xmlns.com/foaf/0.1/primaryTopicOfhttps://pubmed.ncbi.nlm.nih.gov/19464326
http://purl.uniprot.org/citations/19464326http://xmlns.com/foaf/0.1/primaryTopicOfhttps://pubmed.ncbi.nlm.nih.gov/19464326
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