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Heat Shock Protein 40 (HSP40, HDJ1)

Cat no: H1834-15H

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 \nprotein 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). \n\nApplications:\nSuitable for use in Immunofluorescence, ELISA, Western Blot, Immunoprecipitation and Immunohistochemistry. Other applications not tested.\n\nRecommended Dilution:\nWestern Blot: 1:2000\nOptimal dilutions to be determined by the researcher.\n\nStorage and Stability:\nMay be stored at 4 degrees C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20 degrees C. Aliquots are stable for at least 12 months. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

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SPECIFICATIONS

Catalog Number

H1834-15H

Size

25ug

Applications

ELISA, IF, IHC, IP, WB

Hosts

Mouse

Reactivities

Hum, Mouse, Rat

Form

Supplied as a liquid in PBS, pH 7.2, 0.09% sodium azide, 50% glycerol.

P Type

Mab

Purity

Purified by Protein G affinity chromatography.

Isotype

IgG1

References

1. Cheetham M.E. and Caplan A.J. (1998) Cell Stress Chaperones 3: 28

Additional Info

Recognizes hsp40. Species Crossreactivity: human, rat (other species not tested).

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