2L6J

Tah1 complexed by MEEVD

2L6J の概要

• エントリーDOI: 10.2210/pdb2l6j/pdb
• NMR情報: BMRB: 17312
• 分子名称: TPR repeat-containing protein associated with Hsp90, C-terminus Hsp90 chaperone peptide MEEVD (2 entities in total)
• 機能のキーワード: tetratricopeptide repeat (tpr), hsp90 co-factor, protein binding
• 由来する生物種: Saccharomyces cerevisiae (brewer's yeast,lager beer yeast,yeast); 詳細
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 13145.80

構造登録者

Jimenez, B.,Ugwu, F.,Zhao, R.,Orti, L.,Houry, W.A.,Pineda-Lucena, A. (登録日: 2010-11-22, 公開日: 2011-12-28, 最終更新日: 2024-05-01)

主引用文献

Jimenez, B.,Ugwu, F.,Zhao, R.,Orti, L.,Makhnevych, T.,Pineda-Lucena, A.,Houry, W.A.
Structure of minimal tetratricopeptide repeat domain protein Tah1 reveals mechanism of its interaction with Pih1 and Hsp90.
J.Biol.Chem., 287:5698-5709, 2012

PubMed Abstract: Tah1 and Pih1 are novel Hsp90 interactors. Tah1 acts as a cofactor of Hsp90 to stabilize Pih1. In yeast, Hsp90, Tah1, and Pih1 were found to form a complex that is required for ribosomal RNA processing through their effect on box C/D small nucleolar ribonucleoprotein assembly. Tah1 is a minimal tetratricopeptide repeat protein of 111 amino acid residues that binds to the C terminus of the Hsp90 molecular chaperone, whereas Pih1 consists of 344 residues of unknown fold. The NMR structure of Tah1 has been solved, and this structure shows the presence of two tetratricopeptide repeat motifs followed by a C helix and an unstructured region. The binding of Tah1 to Hsp90 is mediated by the EEVD C-terminal residues of Hsp90, which bind to a positively charged channel formed by Tah1. Five highly conserved residues, which form a two-carboxylate clamp that tightly interacts with the ultimate Asp-0 residue of the bound peptide, are also present in Tah1. Tah1 was found to bind to the C terminus of Pih1 through the C helix and the unstructured region. The C terminus of Pih1 destabilizes the protein in vitro and in vivo, whereas the binding of Tah1 to Pih1 allows for the formation of a stable complex. Based on our data, a model for an Hsp90-Tah1-Pih1 ternary complex is proposed.

PubMed: 22179618
DOI: 10.1074/jbc.M111.287458

実験手法

SOLUTION NMR