Os09g0482400

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Annotated Information

Function

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Heat shock proteins (heat shock protein, Hsp) are a class of resistance protein molecules playing an important role in the process of environmental stress[1][2][3].

hsp82 is one of heat shock proteins , that is required in higher concentrations for growth of cells at higher temperatures.

hsp82 is one of the most highly conserved and abundantly synthesized heat shock proteins of eucaryotic cells[4].

It belongs to hsp82/90 family,including hsp82A,hsp82D,and hsp82B[5].

hsp82/90 family encodes a set of structurally related proteins ranging from 82 to 90 kDa[5].

hsp82 products help contribute to survival at high temperatures.

Expression

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They have been isolated and characterized from a variety of evolutionarily diverse species, including Escherichia coli, where the equivalent is officially named htpG). Studies of hsp82/90 and their transcripts have shown that plant genes, like their mammalian counterparts, are developmentally regulated in addition to being controlled by temperature.In eukaryotes, HSP82/90 is present in both nucleus and cytoplasm. where it has been found associated with a very heterogeneous collection of proteins. In mammalian cells, HSP82/90 is most often associated with actin and tubulin , several different protein kinase, and with steroid hormone receptors[5].

Evolution

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You can also add sub-section(s) at will. hsp82 is one of the most highly conserved and abundantly synthesized heat shock proteins of eucaryotic cells. The yeast Saccharomyces cerevisiae contains two closely related genes in the HSP82 gene family. HSC82 was expressed constitutively at a very high level and was moderately induced by high temperatures. HSP82 was expressed constitutively at a much lower level and was more strongly induced by heat. Site-directed disruption mutations were produced in both genes. Cells homozygous for both mutations did not grow at any temperature. Cells carrying other combinations of the HSP82 and HSC82 mutations grew well at 25 degrees C, but their ability to grow at higher temperatures varied with gene copy number. Thus, HSP82 and HSC82 constitute an essential gene family in yeast cells. Although the two proteins had different patterns of expression, they appeared to have equivalent functions; growth at higher temperatures required higher concentrations of either protein.

Labs working on this gene

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Laboratorium voor Genetica, Universiteit Gent, K.L. Ledeganckstraat 35

Howard Hughes Medical Institute, University of Chicago, Illinois 60637.

Department of Cell and Developmental Biology, University of Illinois, Urbana-Champaign, Urbana, Illinois, USA.

Department of Cell Biology, Tokyo Metropolitan Institute of Medical Science, Japan.

References

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[1] Ahuja I, RCH. De Vos, Bones AM, Hall RD: Plant molecular stress responses face climate change. Trends in Plant Science 2010, Vol. 15, No. 12.

[2] Wang W, Vinocur B, Shoseyov O, Altman A: Role of plant heat-shock proteins and molecular chaperones in the abiotic stress response. Trends in Plant Science 2004, Vol. 9, No. 5.

[3] Timperio AM, Egidi MG, Zolla L: Proteomics applied on plant abiotic stresses: Role of heat shock proteins (HSP). Journal of Proteomics 2008, 71: 391-411.

[4]Borkovich KA1, Farrelly FW, Finkelstein DB, Taulien J, Lindquist S:hsp82 is an essential protein that is required in higher concentrations for growth of cells at higher temperatures.Mol Cell Biol. 1989 Sep;9(9):3919-30.

[5]Van Breusegem F1, Dekeyser R, Garcia AB, Claes B, Gielen J, Van Montagu M, Caplan AB:Heat-inducible rice hsp82 and hsp70 are not always co-regulated.Planta. 1994;193(1):57-66.