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Cat. Number
070296723330741
Chemical Name
Hsp90 Polyclonal Antiserum
References
Synonyms
  • Heat Shock Protein 90
Formulation Antiserum
Stability 1 year
Storage -20°C
Shipping Wet ice in continental US; may vary elsewhere
Specificity
Human Hsp90α/β +
Rat Hsp90α/β +
Murine Hsp90α/β +

Background Reading

Pratt, W.B. The Hsp90-based chaperone system: Involvement in signal transduction from a variety of hormone and growth factor receptors. Proc Soc Exp Biol Med 217 420-434 (1998).

Pratt, W.B., and Toft, D.O. Steroid receptor interactions with heat shock protein and immunophilin chaperones. Endocr Rev 18(3) 306-360 (1997).

Pratt, W.B., and Toft, D.O. Regulation of signaling protein function and trafficking by the Hsp90/Hsp70-based chaperone machinery. Exp Biol Med 228 111-133 (2003).

Neckers, L. Hsp90 inhibitors as novel cancer chemotherapeutic agents. Trends Mol Med 8(4 Suppl.) S55-S61 (2002).

Pearl, L.H., and Prodromou, C. Structure, function, and mechanism of the Hsp90 molecular chaperone. Adv Protein Chem 59 157-172 (2001).

Whitesell, L., Mimnaugh, E.G., De Costa, B., et al. Inhibition of heat shock protein Hsp90-pp60v-src heteroprotein complex formation by benzoquinone ansamycins: Essential role for stress proteins in oncogenic transformation. Proc Natl Acad Sci USA 91 8324-8328 (1994).

Arlander, S.J.H., Eapen, A.K., Vroman, B.T., et al. Hsp90 inhibition depletes Chk1 and sensitizes tumor cells to replication stress. J Biol Chem 278(52) 52572-52577 (2003).

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Size Global Purchasing
25 µg  
100 µg  

Description

Antigen: Full length Hsp90 · Host: rabbit · Application(s): WB, ELISA, and IP · Hsp90 is a highly conserved and essential stress protein that is expressed in all eukaryotic cells. From a functional perspective, Hsp90 participates in the folding, assembly, maturation, and stabilization of specific proteins as an integral component of a chaperone complex.1,2,3,4 Despite its label of being a heat shock protein, Hsp90 is one of the most highly expressed proteins in unstressed cells (1-2% of cytosolic protein). It carries out a number of housekeeping functions-including controlling the activity, turnover, and trafficking of a variety of proteins. Most of the Hsp90-regulated proteins that have been discovered to date are involved in cell signaling.5,6 The number of proteins now known to interact with Hsp90 is about 100. Target proteins include the kinases v-Src, Wee1, and c-Raf, transcriptional regulators such as p53 and steroid receptors, and the polymerases of the hepatitis B virus and telomerase.7 When bound to ATP, Hsp90 interacts with co-chaperones Cdc37, p23, and an assortment of immunophilin-like proteins, forming a complex that stabilizes and protects target proteins from proteasomal degradation. In most cases, Hsp90-interacting proteins have been shown to co-precipitate with Hsp90 when carrying out immunoadsorption studies, and to exist in cytosolic heterocomplexes with it. In a number of cases, variations in Hsp90 expression or Hsp90 mutation has been shown to degrade signaling function via the protein or to impair a specific function of the protein (such as steroid-binding, kinase activity) in vivo. Ansamycin antibiotics, such as geldanamycin and radiciol, inhibit Hsp90 function.7

1 Arlander, S.J.H., Eapen, A.K., Vroman, B.T., et al. Hsp90 inhibition depletes Chk1 and sensitizes tumor cells to replication stress. J Biol Chem 278(52) 52572-52577 (2003).

2 Pearl, L.H., and Prodromou, C. Structure, function, and mechanism of the Hsp90 molecular chaperone. Adv Protein Chem 59 157-172 (2001).

3 Neckers, L. Hsp90 inhibitors as novel cancer chemotherapeutic agents. Trends Mol Med 8(4 Suppl.) S55-S61 (2002).

4 Pratt, W.B., and Toft, D.O. Regulation of signaling protein function and trafficking by the Hsp90/Hsp70-based chaperone machinery. Exp Biol Med 228 111-133 (2003).

5 Pratt, W.B., and Toft, D.O. Steroid receptor interactions with heat shock protein and immunophilin chaperones. Endocr Rev 18(3) 306-360 (1997).

6 Pratt, W.B. The Hsp90-based chaperone system: Involvement in signal transduction from a variety of hormone and growth factor receptors. Proc Soc Exp Biol Med 217 420-434 (1998).

7 Whitesell, L., Mimnaugh, E.G., De Costa, B., et al. Inhibition of heat shock protein Hsp90-pp60v-src heteroprotein complex formation by benzoquinone ansamycins: Essential role for stress proteins in oncogenic transformation. Proc Natl Acad Sci USA 91 8324-8328 (1994).

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