Reference: Schiller D (2009) Pam17 and Tim44 act sequentially in protein import into the mitochondrial matrix. Int J Biochem Cell Biol 41(11):2343-9

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Abstract


Import of proteins into the matrix is driven by the Tim23 presequence translocase-associated import motor PAM. The core component of PAM is the mitochondrial chaperone mtHsp70, which ensures efficient translocation of proteins across the inner membrane through interactions with the J-protein complex Pam16-Pam18 (Tim16-Tim14) and its cochaperone Tim44. The recently identified non-essential Pam17 is a further member of PAM. Genetic and biochemical analyses reveal synthetic interactions between PAM17 and TIM44. Pam17 is involved in an early stage of protein translocation whereas Tim44 assists in a later step of transport, suggesting that both proteins can cooperate in a complementary manner in protein import.

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Journal Article | Research Support, N.I.H., Extramural | Research Support, Non-U.S. Gov't
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Schiller D
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