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Role of Hsp70 in Cancer Growth and Survival

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Hsp70 is a highly conserved protein that refolds misfolded proteins and has numerous housekeeping functions which regulate apoptosis and other cell activities. Hsp70 consists of a nucleotide binding domain which binds ATP and a substrate binding domain that binds misfolded proteins. The substrate binding domain contains a peptide binding pocket which is covered by a helical lid. In humans, there are three major cytosolic Hsp70 isotypes, Hsp70-8, Hsp70-1 and Hsp70-2. Leukemic and numerous other cancer cells have a greater amount of Hsp70-1 and -2, which help the cancer cells inhibit apoptosis in response to stress. This review summarizes the structure and role of Hsp70 proteins in cancer survival.
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Keywords: ATP-induced high-to-low affinity; ATPase; DnaK; Heat shock protein; Hsp70; apoptosis; cancer; cancer cells; housekeeping functions; inhibition; nucleotide-binding domain (NBD); phospholipases; structure; substrate binding domain

Document Type: Research Article

Affiliations: Department of Biomedical Sciences, Creighton University School of Medicine, 2500 California Plaza, Omaha, NE 68178.

Publication date: 2012-06-01

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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