Technical Data

H1834-15H
Clone Type
Monoclonal
Host
Mouse
Source
Human
Isotype
IgG1
Clone Number
3B9.E6
Grade
Affinity Purified
Applications
E IF IHC IP WB
Crossreactivity
Hu Mo Rt
Accession #
NP_006136.1
Gene ID
3337
Shipping Temp
Blue Ice
Storage Temp
-20°C
Mouse Anti-Heat Shock Protein 40 (HSP40, HDJ1)

Human Hsp40/DnaJ proteins comprise a large protein family, members of which feature the J domain (named after the bacterial DnaJ protein) (1). The J-domain spans the first 75 N-terminal amino acids and is separated from the C-terminal by a glycine/phenylalanine-rich domain (2). Members of the Hsp40/DnaJ family play diverse roles in many cellular processes, such as folding, translocation, degradation and assembly of multi-protein complexes. In particular, Hdj1, the first human Hsp40/DnaJ protein identified, plays an important role in protein translation and folding, as well as in the regulation of Hsp70 function (3). HSP40 stimulates the ATPase activity of HSP70 which in turn causes conformational changes of the unfolded proteins (4, 5). The Hsp40-Hsp70-unfolded protein complex further binds to co-chaperones Hip, Hop and HSP90 which leads to protein folding, or components of protein degradation machinery CHIP and BAG-1 (6). Some studies have shown that the difference between HDJ1 and type 1 DNAJ proteins including HDJ2 and yeast YdjI is the result of the possession of a zinc finger domain by the latter, which helps in the function of protein folding. (7, 8).

Applications
Suitable for use in Immunofluorescence, ELISA, Western Blot, Immunoprecipitation and Immunohistochemistry. Other applications not tested.
Recommended Dilution
Western Blot: 1:2000 Optimal dilutions to be determined by the researcher.
Storage and Stability
May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
Immunogen
Recombinant protein corresponding to human HSP40.
Form
Supplied as a liquid in PBS, pH 7.2, 0.09% sodium azide, 50% glycerol.
Purity
Purified by Protein G affinity chromatography.
Specificity
Recognizes human HSP40. Species Crossreactivity: mouse and rat. Does not cross-react with HDJ2 or YDJ1.

Intended for research use only. Not for use in human, therapeutic, or diagnostic applications.

References
1. Cheetham M.E. and Caplan A.J. (1998) Cell Stress Chaperones 3: 28–36. 2. Fan C.Y., et al. (2003) Cell Stress Chaperones 8: 309–316. 3. Sohn S.Y., Kim S.B., Kim J., and Ahn B.Y. (2006) J Gen Virol. 87(7): 1883-91. 4. Liberek K. et al. (1991) Proc. Natl. Acad. Sci. USA 88:2874–2878. 5. Cyr D.M., et al. (1992) J Biol Chem. 267: 20927–20931. 6. Höhfeld J., et al. (2001) EMBO Rep. 2: 885–890. 7. Terda K., et al. (1997) J Cell Biol. 139: 1089-1095. 8. Lu Z. and Cyr D.M. (1998) J Biol Chem. 273: 27824-27830.
USBio References
No references available
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