Genomic organization of hsp90 gene family in Arabidopsis

Genomic organization of hsp90 gene family in Arabidopsis We have isolated six members of the hsp90 gene family from Arabidopsis thaliana. Three genes designated hsp81.2, 81.3 and 81.4 are clustered within a 15 kb genomic region while two of these are 1.5 kb apart in a head-to-head orientation. The deduced amino acid sequence shows that the members can be divided into two types. The hsp81.1, 81.2, 81.3 and 81.4 genes comprise the cytosolic hsp90 type having few introns. However, the hsp88.1 and 89.1 genes comprising the organelle type are composed of 18 or 19 introns. Sequence comparison showed there is high homology among the cytosolic members while there is less homology among the organelle members. The expression of the hsp90 genes and mRNA accumulation in plants and calli is very low at control temperatures and is strongly induced by heat-shock. Arsenite stress strongly stimulates the expression of this gene family. Plant Molecular Biology Springer Journals

Genomic organization of hsp90 gene family in Arabidopsis

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Kluwer Academic Publishers
Copyright © 1997 by Kluwer Academic Publishers
Life Sciences; Biochemistry, general; Plant Sciences; Plant Pathology
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