HSP70 from the Antarctic sea urchin Sterechinus neumayeri: molecular characterization and expression in response to heat stress

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dc.contributor.authorGonzález-Aravena, Marcelo
dc.contributor.authorCalfio, Camila
dc.contributor.authorMercado, Luis
dc.contributor.authorMorales-Lange, Byron
dc.contributor.authorBethke, Jorn
dc.contributor.authorDe Lorgeril, Julien
dc.contributor.authorCárdenas, César A.
dc.date.accessioned2018-12-03T21:12:50Z
dc.date.available2018-12-03T21:12:50Z
dc.date.issued2018
dc.description.abstractBackground: Heat stress proteins are implicated in stabilizing and refolding denatured proteins in vertebrates and invertebrates. Members of the Hsp70 gene family comprise the cognate heat shock protein (Hsc70) and inducible heat shock protein (Hsp70). However, the cDNA sequence and the expression of Hsp70 in the Antarctic sea urchin are unknown. Methods: We amplified and cloned a transcript sequence of 1991 bp from the Antarctic sea urchin Sterechinus neumayeri, experimentally exposed to heat stress (5 and 10 °C for 1, 24 and 48 h). RACE-PCR and qPCR were employed to determine Hsp70 gene expression, while western blot and ELISA methods were used to determine protein expression. Results: The sequence obtained from S. neumayeri showed high identity with Hsp70 members. Several Hsp70 family features were identified in the deduced amino acid sequence and they indicate that the isolated Hsp70 is related to the cognate heat shock protein type. The corresponding 70 kDa protein, called Sn-Hsp70, was immune detected in the coelomocytes and the digestive tract of S. neumayeri using a monospecific polyclonal antibody. We showed that S. neumayeri do not respond to acute heat stress by up-regulation of Sn-Hsp70 at transcript and protein level. Furthermore, the Sn-Hsp70 protein expression was not induced in the digestive tract. Conclusions: Our results provide the first molecular evidence that Sn-Hsp70 is expressed constitutively and is noninduced by heat stress in S. neumayeri.es_ES
dc.identifier.citationBiol Res (2018) 51:8es_ES
dc.identifier.issn0717-6287
dc.identifier.urihttp://hdl.handle.net/20.500.11894/1192
dc.language.isoenes_ES
dc.publisherSociedad de Biología de Chilees_ES
dc.relation.ispartofBiological Researches_ES
dc.relation.ispartofVol 51:8
dc.rightsCreative Commons Attribution 4.0 International licensees_ES
dc.subjectCienciaes_ES
dc.subjectClimate changees_ES
dc.subjectEchinodermses_ES
dc.subjectCoelomocyteses_ES
dc.titleHSP70 from the Antarctic sea urchin Sterechinus neumayeri: molecular characterization and expression in response to heat stresses_ES
dc.typeArtículoes_ES
dcterms.identifierdoi:10.1186/s40659-018-0156-9

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