Product Pathways - Protein Folding/Stability
HSP70 (6B3) Rat mAb #4873
| Applications | Reactivity | Sensitivity | MW (kDa) | Source | Isotype |
|---|---|---|---|---|---|
| W IP IHC-P IF-IC F | H Mk | Endogenous | 70 | Rat | IgG1 |
Applications Key:
W=Western Blotting
IP=Immunoprecipitation
IHC-P=Immunohistochemistry (Paraffin)
IF-IC=Immunofluorescence (Immunocytochemistry)
F=Flow Cytometry
Reactivity Key:
H=Human
Mk=Monkey
Species enclosed in parentheses are predicted to react based on 100% sequence homology. Species cross-reactivity is determined by Western blot.
Specificity / Sensitivity
HSP70 (6B3) Rat mAb detects endogenous levels of the inducible isoform of HSP70 protein. This antibody does not cross-react with other HSPs.
Source / Purification
Monoclonal antibodies are produced by immunizing rats with the recombinant human HSP70 expressed in E.coli.
Western Blotting
Western blot analysis of extracts from HeLa and COS cells, using HSP70 (6B3) Rat mAb.
IHC-P (paraffin)
Immunohistochemical analysis of paraffin-embedded human breast carcinoma, using HSP70 (6B3) Rat mAb.
IHC-P (paraffin)
Immunohistochemical analysis of paraffin-embedded human lung carcinoma, showing cytoplasmic and nuclear localization using HSP70 (6B3) Rat mAb.
Flow Cytometry
Flow cytometric analysis of Hela cells, using HSP70 (6B3) Rat mAb (blue) compared to a nonspecific negative control antibody (red).
IF-IC
Confocal immunofluorescent analysis of HeLa cells labeled with HSP70 (6B3) Rat mAb (green, left) compared to an isotype control (right). Actin filaments have been labeled with Alexa Fluor® 555 phalloidin (red). Blue pseudocolor = DRAQ5™ (fluorescent DNA dye).
Background
HSP70 and HSP90 are molecular chaperones expressed constitutively under normal conditions to maintain protein homeostasis and are induced upon environmental stress (1). Both HSP70 and HSP90 are able to interact with unfolded proteins to prevent irreversible aggregation and catalyze the refolding of their substrates in an ATP and co-chaperone dependent manner (1). HSP70 has a broad range of substrates including newly synthesized and denatured proteins, while HSP90 tends to have a more limited subset of substrates, most of which are signaling molecules. HSP70 and HSP90 often function collaboratively in a multi-chaperone system, which requires a minimal set of co-chaperones: HSP40, Hop and p23 (2,3). The co-chaperones either regulate the intrinsic ATPase activity of the chaperones or recruit chaperones to specific substrates or subcellular compartments (1,4). When the ubiquitin ligase CHIP associates with the HSP70/HSP90 complex as a cofactor, the unfolded substrates are subjected to degradation by the proteasome (4). The biological functions of HSP70/HSP90 go beyond their chaperone activity. They are essential for the maturation and inactivation of nuclear hormones and other signaling molecules (1,3). They also play a role in vesicle formation and protein trafficking (2).
- Nollen, E.A. and Morimoto, R.I. (2002) J. Cell Sci. 115, 2809-2816.
- Young, J.C. et al. (2003) Trends Biochem. Sci. 28, 541-547.
- Pratt, W.B. and Toft, D.O. (2003) Exp. Biol. Med. 228, 111-133.
- Hohfeld, J. et al. (2001) EMBO Rep. 2, 885-890.
Application References
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This product is for in vitro research use only and is not intended for use in humans or animals. This product is not intended for use as therapeutic or in diagnostic procedures.
