Abstract:
:Reactive oxygen species (ROS) in plants, arising from various environmental stresses, impair the thiol-contained proteins that are susceptible to irregular oxidative formation of disulfide bonds, which might be alleviated by a relatively specific modifier called protein disulfide isomerase (PDI). From our previous data of the transcriptome and digital gene expression of cold-hardened Jatropha curcas, a PDI gene was proposed to be cold-relevant. In this study, its full-length cDNA (JcPDI) was cloned, with the size of 1649 bp containing the entire open reading frame (ORF) of 1515 bp. This ORF encodes a polypeptide of 504 amino acids with theoretical molecular weight of 56.6 kDa and pI value of 4.85. One N-terminal signal peptide (-MASKGSIWSCMFLFSLI VAISAGEG-) and the C-terminal anchoring sequence motif (-KDEL-) specific to the endoplasmic reticulum, as well as two thioredoxin domains (-CGHC-), are also found by predictions. Through semi-quantitative RT-PCR, the expression of JcPDI was characterized to be tissue-differential strongly in leaves and roots, but weakly in stems, and of cold-induced alternations. Furthermore, JcPDI overexpression in yeast could notably enhance the cold resistance of host cells. Conclusively, these results explicitly suggested a considerable association of JcPDI to cold response and a putative application potential for its correlated genetic engineering.
journal_name
Appl Biochem Biotechnoljournal_title
Applied biochemistry and biotechnologyauthors
Wang H,Zou Z,Gong Mdoi
10.1007/s12010-015-1585-3subject
Has Abstractpub_date
2015-05-01 00:00:00pages
428-39issue
2eissn
0273-2289issn
1559-0291journal_volume
176pub_type
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