Heat shock protein gene family of the Porphyra seriata and enhancement of heat stress tolerance by PsHSP70 in Chlamydomonas = 모무늬 돌김의 Heat shock protein 유전자발굴 및 PsHSP70 유전자 발현 클라미도모나스에서 고온 내성 증가

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Title
Heat shock protein gene family of the Porphyra seriata and enhancement of heat stress tolerance by PsHSP70 in Chlamydomonas = 모무늬 돌김의 Heat shock protein 유전자발굴 및 PsHSP70 유전자 발현 클라미도모나스에서 고온 내성 증가
Author(s)
H S Park; Won Joong Jeong; E Kim; Y Jung; Jong Min Lim; M S Hwang; E J Park; D S Ha; D W Choi
Bibliographic Citation
Marine Biotechnology, vol. 14, no. 3, pp. 332-342
Publication Year
2012
Abstract
Heat shock proteins and molecular chaperones are key components contributing to survival in the abiotic stress response. Porphyra seriata grows on intertidal rocks exposed to dynamic environmental changes associated with the turning tides, including desiccation and heat stress. Analysis of the ESTs of P. seriata allows us to identify the nine HSP cDNAs, which are predicted to be PsHSP90, three PsHSP70, PsHSP40 and PsHSP20, and three 5′-truncated HSP cDNAs. RT-PCR results show that most of the PsHSP transcripts were detected under normal cell growth conditions as well as heat stress, with the exception of two cDNAs. In particular, PsHSP70b and PsHSP20 transcripts were upregulated by heat stress. When the putative mitochondrial PsHSP70b was introduced and overexpressed in Chlamydomonas, transformed Chlamydomonas evidenced higher rates of survival and growth than those of the wild type under heat stress conditions. Constitutive overexpression of the PsHSP70b gene increases the transcription of the HSF1 as well as the CrHSP20 and CrHSP70 gene. These results indicate that PsHSP70b is involved in tolerance to heat stress and the effects on transcription of the CrHSP20 and CrHSP70 genes.
Keyword
ChlamydomonasHeat toleranceHSPPorphyra seriata
ISSN
1436-2228
Publisher
Springer
DOI
http://dx.doi.org/10.1007/s10126-011-9417-0
Type
Article
Appears in Collections:
Division of Biomaterials Research > Plant Systems Engineering Research > 1. Journal Articles
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