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family:comment |
This family includes eukaryotic, prokaryotic and archaealproteins that bear similarity to a C-terminal region of human activator of 90 kDa heat shock protein ATPase homolog 1 (AHSA1/p38, Swiss:O95433). This protein is known to interact with the middle domain of Hsp90, and stimulate its ATPase activity [1]. It is probably a general upregulator of Hsp90 function, particularly contributing to its efficiency in conditions of increased stress [2]. p38 is also known to interact with the cytoplasmic domain of the VSV G protein, and may thus be involved in protein transport [3]. It has also been reported as being underexpressed in Down's syndrome. This region is found repeated in two members of this family (Swiss:Q8XY04 and Swiss:Q6MH87).
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