J Biol Chem. 1999 Nov 26;274(48):34425-32.

Specific interaction of the 70-kDa heat shock cognate protein with the tetratricopeptide repeats.

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Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan, Republic of China.

Abstract

Using a yeast two-hybrid system with the 70-kDa heat shock cognate protein (hsc70) or its C-terminal 30-kDa domain as baits, we isolated several proteins interacting with hsc70, including Hip/p48 and p60/Hop. Both are known to interact with hsc70. Except for Hip/p48, all of the proteins that we isolated interact with the 30-kDa domain. Moreover, the EEVD motif at the C terminus of the 30-kDa domain appears essential for this interaction. Sequence analysis of these hsc70-interacting proteins reveals that they all contain tetratricopeptide repeats. Using deletion mutants of these proteins, we demonstrated either by two-hybrid or in vitro binding assays that the tetratricopeptide repeat domains in these proteins are necessary and sufficient for mediating the interaction with hsc70.

PMID:: 10567422; [PubMed - indexed for MEDLINE]

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J Biol Chem. 1999 Nov 26 ;274(48):34425-32.

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