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- W2028156775 abstract "Abstract Background ClpB-cyt/HSP100 protein acts as chaperone, mediating disaggregation of denatured proteins. Previous studies have shown that ClpB-cyt/HSP100 gene belongs to the group class I Clp ATPase proteins and ClpB-cyt/HSP100 transcript is regulated by heat stress and developmental cues. Results Nine ORFs were noted to constitute rice class I Clp ATPases in the following manner: 3 ClpB proteins (ClpB-cyt, Os05g44340; ClpB-m, Os02g08490; ClpB-c, Os03g31300), 4 ClpC proteins (ClpC1, Os04g32560; ClpC2, Os12g12580; ClpC3, Os11g16590; ClpC4, Os11g16770) and 2 ClpD proteins (ClpD1, Os02g32520; ClpD2, Os04g33210). Using the respective signal sequences cloned upstream to GFP/CFP reporter proteins and transient expression studies with onion epidermal cells, evidence is provided that rice ClpB-m and Clp-c proteins are indeed localized to their respective cell locations mitochondria and chloroplasts, respectively. Associated with their diverse cell locations, domain structures of OsClpB-c, OsClpB-m and OsClpB-cyt proteins are noted to possess a high-level conservation. OsClpB-cyt transcript is shown to be enriched at milk and dough stages of seed development. While expression of OsClpB-m was significantly less as compared to its cytoplasmic and chloroplastic counterparts in different tissues, this transcript showed highest heat-induced expression amongst the 3 ClpB proteins. OsClpC1 and OsClpC2 are predicted to be chloroplast-localized as is the case with all known plant ClpC proteins. However, the fact that OsClpC3 protein appears mitochondrial/chloroplastic with equal probability and OsClpC4 a plasma membrane protein reflects functional diversity of this class. Different class I Clp ATPase transcripts were noted to be cross-induced by a host of different abiotic stress conditions. Complementation assays of Δhsp104 mutant yeast cells showed that OsClpB-cyt , OsClpB-m , OsClpC1 and OsClpD1 have significantly positive effects. Remarkably, OsClpD1 gene imparted appreciably high level tolerance to the mutant yeast cells. Conclusions Rice class I Clp ATPase gene family is constituted of 9 members. Of these 9, only 3 belonging to ClpB group are heat stress regulated. Distribution of ClpB proteins to different cell organelles indicates that their functioning might be critical in different cell locations. From the complementation assays, OsClpD1 appears to be more effective than OsClpB-cyt protein in rescuing the thermosensitive defect of the yeast ScΔhsp104 mutant cells." @default.
- W2028156775 created "2016-06-24" @default.
- W2028156775 creator A5014432153 @default.
- W2028156775 creator A5052305400 @default.
- W2028156775 creator A5069457918 @default.
- W2028156775 creator A5078972528 @default.
- W2028156775 date "2010-02-08" @default.
- W2028156775 modified "2023-10-06" @default.
- W2028156775 title "Genome-wide analysis of rice ClpB/HSP100, ClpC and ClpD genes" @default.
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- W2028156775 doi "https://doi.org/10.1186/1471-2164-11-95" @default.
- W2028156775 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2829514" @default.
- W2028156775 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20141629" @default.
- W2028156775 hasPublicationYear "2010" @default.
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