This entry corresponds to the STI1/HOP aspartate/proline-rich (DP) domain that is found in two copies in the Sti1 protein and are referred to as DP1 and DP2 [1,2,3]. STI1/HOP proteins are cochaperones that belong to the foldosome, a system consisting in Hsp70 and Hsp90 chaperones. STI1/HOP acts as an adapter protein capable of transferring client proteins from the first to the second molecular chaperone [3]. This domain (and specifically DP2 from STI1) is involved in client activation [2,3].

1: Solution structure of the C-terminal NP-repeat domain of Tic40, a co-chaperone during protein import into chloroplasts. Kao YF, Lou YC, Yeh YH, Hsiao CD, Chen C; J Biochem. 2012;152:443-451. PMID:22888115

2: The architecture of functional modules in the Hsp90 co-chaperone Sti1/Hop. Schmid AB, Lagleder S, Grawert MA, Rohl A, Hagn F, Wandinger SK, Cox MB, Demmer O, Richter K, Groll M, Kessler H, Buchner J; EMBO J. 2012;31:1506-1517. PMID:22227520

3: Structural studies of the Hsp70/Hsp90 organizing protein of Plasmodium falciparum and its modulation of Hsp70 and Hsp90 ATPase activities. Silva NSM, Bertolino-Reis DE, Dores-Silva PR, Anneta FB, Seraphim TV, Barbosa LRS, Borges JC; Biochim Biophys Acta Proteins Proteom. 2020;1868:140282. PMID:31525467