2LWX

Solution structure of the C-terminal Pdr1-activating domain of the J-protein Zuo1

2LWX の概要

• エントリーDOI: 10.2210/pdb2lwx/pdb
• NMR情報: BMRB: 17685
• 分子名称: Zuotin (1 entity in total)
• 機能のキーワード: j-protein, molecular chaperone, pleiotropic drug resistance, chaperone
• 由来する生物種: Saccharomyces cerevisiae (Baker's yeast)
• 細胞内の位置: Cytoplasm: P32527
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 11836.21

構造登録者

Volkman, B.F.,Ducett, J.K.,Peterson, F.C.,Craig, E.A. (登録日: 2012-08-08, 公開日: 2012-10-03, 最終更新日: 2024-05-15)

主引用文献

Ducett, J.K.,Peterson, F.C.,Hoover, L.A.,Prunuske, A.J.,Volkman, B.F.,Craig, E.A.
Unfolding of the C-terminal domain of the j-protein zuo1 releases autoinhibition and activates pdr1-dependent transcription.
J.Mol.Biol., 425:19-31, 2013

PubMed Abstract: The C-terminal 69 residues of the J-protein Zuo1 are sufficient to activate Pdr1, a transcription factor involved in both pleiotropic drug resistance and growth control. Little is understood about the pathway of activation by this primarily ribosome associated Hsp40 co-chaperone. Here, we report that only the C-terminal 13 residues of Zuo1 are required for activation of Pdr1, with hydrophobic residues being critical for activity. Two-hybrid interaction experiments suggest that the interaction between this 13-residue Zuo1 peptide and Pdr1 is direct, analogous to the activation of Pdr1 by xenobiotics. However, simply dissociation of Zuo1 from the ribosome is not sufficient for induction of Pdr1 transcriptional activity, as the C-terminal 86 residues of Zuo1 fold into an autoinhibitory left-handed four-helix bundle. Hydrophobic residues critical for interaction with Pdr1 are sequestered within the structure of this C-terminal domain (CTD), necessitating unfolding for activation. Thus, although expression of the CTD does not result in activation, alterations that destabilize the structure cause induction of pleiotropic drug resistance. These destabilizing alterations also result in dissociation of the full-length protein from the ribosome. Thus, our results are consistent with an activation pathway in which unfolding of Zuo1's C-terminal helical bundle domain results in ribosome dissociation followed by activation of Pdr1 via a direct interaction.

PubMed: 23036859
DOI: 10.1016/j.jmb.2012.09.020

実験手法

SOLUTION NMR