抗HSP90 (Salmon)抗体 | Anti-HSP90 (Salmon) antibody

HSP90 (Salmon) Antibody

Polyclonal

Rabbit Anti-Salmon HSP90 (Salmon) Polyclonal

Cancer, Heat Shock, Cell Signaling, Chaperone Proteins, Protein Trafficking, Tumor Biomarkers

HSP84 Antibody, HSP86 Antibody, HSP90A Antibody, HSP90AA1 Antibody, HSP90AB1 Antibody, HSP90B Antibody, HSPC1 Antibody, HSPC2 Antibody, HSPCAL1 Antibody, HSPCAL4 Antibody, HSP90N Antibody

Rabbit

KLH-conjugated synthetic peptide chosen from a highly conserved region of HSP90 found in both the alpha and beta form. The taget peptide is perfectly conserved in animals.

WB

Human, Fish, Salmon

NP_001117004.1

100136360

Q9W6K6

Detects ~90kDa. In salmonid fish a cross-reactive band at 40kDa is observed. Antibody will also detect a Human recombinant HSP90 protein.

Rabbit antiserum

Lyophilized rabbit Antiserum. For reconstitution add 100 µl of sterile water.

0.2 µl/ml of SPC-316 was sufficient for detection of HSP90 in 10 µg Heat shocked (25°C) rainbow trout nuclear fraction lysate by colorimetric immunoblot analysis using Goat anti-rabbit IgG:HRP as the secondary antibody.

Scientific Background
HSP90 is an abundantly and ubiquitously expressed heat shock protein. It is understood to exist in two principal forms α and β, which share 85% sequence amino acid homology. The two isoforms of HSP90, are expressed in the cytosolic compartment (1). Despite the similarities, HSP90α exists predominantly as a homodimer while HSP90β exists mainly as a monomer.(2) From a functional perspective, HSP90 participates in the folding, assembly, maturation, and stabilization of specific proteins as an integral component of a chaperone complex. (3-6) Furthermore, HSP90 is highly conserved between species; having 60% and 78% amino acid similarity between mammalian and the corresponding yeast and Drosophila proteins, respectively. HSP90 is a highly conserved and essential stress protein that is expressed in all eukaryotic cells. Despite it’s 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. (7-8). The number of proteins now know 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.5 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 radicicol, inhibit HSP90 function (9). Looking for more information on HSP90? Visit our new HSP90 Scientific Resource Guide.

References
1. Nemoto T., et al. (1997) J.Biol Chem. 272: 26179-26187.
2. Minami Y., et al. (1991), J.Biol Chem. 266: 10099-10103.
3. Arlander S.J.H., et al. (2003) J Biol Chem 278: 52572-52577.
4. Pearl H., et al. (2001) Adv Protein Chem 59:157-186.
5. Neckers L., et al. (2002) Trends Mol Med 8:S55-S61.
6. Pratt W., Toft D. (2003) Exp Biol Med 228:111-133.
7. Pratt W., Toft D. (1997) Endocr Rev 18:306–360.
8. Pratt W.B. (1998) Proc Soc Exptl Biol Med 217: 420–434.
9. Whitesell L., et al. (1994) Proc Natl Acad Sci USA 91: 8324–8328.
10. Barent R. L. (1998) Mol. Endocrinol. 12: 342-354
11. Lo. M.A. (1998) EMBO J. 17: 6879-6887.