Human Heat Shock Protein 90alpha (GenBank Accession No. NM_005348), full length with C-terminal His-tag, MW = 85.5 kDa, expressed in an E. coli expression system.
Specific activity: Kd = 11.8 nM.
Background
Hsp90 (90 kDa heat shock protein) is a molecular chaperone that aids protein folding and quality control for a large number of client proteins. Functional Hsp90 operates as dimer and has intrinsic ATPase activity. The Hsp90 dimer acts in concert with other chaperones (e.g. Hsp70) and is regulated by a number of co-chaperones/accessory proteins (e.g. Hop, cdc37). Hsp90 has been shown to interact with> 100 proteins and some notable clients include kinases (e.g. Raf-1), nuclear hormone receptors (e.g. estrogen receptors), transcription factors (e.g. p53), GPCRs (e.g. CB2 receptors) and ion channels (e.g. CFTR). In humans, the Hsp90beta isoform is constitutively expressed whereas the Hsp90alpha isoforms is expressed under stress conditions. Hsp90 plays an important role in some tumor cell types by stabilising mutated oncogenic proteins.
Immunogen Region
full length
Tag
C-terminal His-tag
Formulation
45 mM Tris-HCl, pH 8.0, 124 mM NaCl, 2.4 mM KCl, 225 mM imidazole, 10% glycerol, and 3 mM DTT.
Species
Human
Application
Useful for the study of enzyme kinetics, screening inhibitors, and selectivity profiling
Notes
Buffer contains 0.1M HEPES, pH 7.4, 0.25M MgCl2, 0.25M KCl, 0.1M Na2MoO4, and 0.05% Triton X. Incubated Hsp90alpha in a series dilution with 5 nM FITC-labeled geldanamycin for 150 minutes at room temperature. Fluorescence polarization measured at ex 470/em528.
Avoid freeze/thaw cycles.
GenBank
NM_005348
Mw(kda)
85.5 kDa
Synonyms
HSP90a, Heat Shock Protein 90a, HSP90alpha, HSP90alpha
Uniprot
P07900
Shipping Temperature
-80°C (dry ice)
Format
Aqueous buffer solution
Storage
At least 6 months at -80°C.
Reference
1. Wayne N. and Bolon D.N. J Biol Chem. 2007 Nov 30;282(48):35386-95. 2. Pearl L.H., et al. Biochem J. 2008 Mar 15;410(3):439-53.Application Reference(s): 1. The quinone methide aurin is a heat shock response inducer that causes proteotoxic stress and Noxa-dependent apoptosis in malignant melanoma cells (2015) 2.Herbimycins D-F, ansamycin analogues from Streptomyces sp. RM-7-15 (2013)