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Title (Primary) Description of strongly heat-inducible heat shock protein 70 transcripts from Baikal endemic amphipods
Author Drozdova, P.; Bedulina, D.; Madyarova, E.; Rivarola-Duarte, L.; Schreiber, S.; Stadler, P.F.; Luckenbach, T.; Timofeyev, M.;
Journal Scientific Reports
Year 2019
Department BIOTOX; MOLSYB;
Volume 9
Language englisch;
POF III (all) T32;
UFZ wide themes LabEglo
Abstract Heat shock proteins/cognates 70 are chaperones essential for proper protein folding. This protein family
comprises inducible members (Hsp70s) with expression triggered by the increased concentration of
misfolded proteins due to protein-destabilizing conditions, as well as constitutively expressed cognate
members (Hsc70s). Previous works on non-model amphipod species Eulimnogammarus verrucosus
and Eulimnogammarus cyaneus, both endemic to Lake Baikal in Eastern Siberia, have only revealed
a constitutively expressed form, expression of which was moderately further induced by proteindestabilizing
conditions. Here we describe heat-inducible hsp70s in these species. Contrary to the common approach of using sequence similarity with hsp/hsc70 of a wide spectrum of organisms and some characteristic features, such as absence of introns within genes and presence of heat shock elements in their promoter areas, the present study is based on next-generation sequencing for the studied or related species followed by differential expression analysis, quantitative PCR validation and detailed investigation of the predicted polypeptide sequences. This approach allowed us to describe a novel type of hsp70 transcripts that overexpress in response to heat shock. Moreover, we propose diagnostic sequence features of this Hsp70 type for amphipods. Phylogenetic comparisons with different types of Hsp/Hsc70s allowed us to suggest that the hsp/hsc70 gene family in Amphipoda diversified into cognate and heat-inducible paralogs independently from other crustaceans. Thus, the cognate and inducible hsp70 types in distant taxa may not be recognized by sequence similarity.
ID 21932
Persistent UFZ Identifier
Drozdova, P., Bedulina, D., Madyarova, E., Rivarola-Duarte, L., Schreiber, S., Stadler, P.F., Luckenbach, T., Timofeyev, M. (2019):
Description of strongly heat-inducible heat shock protein 70 transcripts from Baikal endemic amphipods
Sci. Rep. 9 , art. 8907