6I68

Co-crystal structure of human SPOP MATH domain (M117V) and human BRD3 fragment

6I68 の概要

• エントリーDOI: 10.2210/pdb6i68/pdb
• 関連するPDBエントリー: 6I41 6I5P
• 分子名称: Speckle-type POZ protein, Bromodomain-containing protein 3 (3 entities in total)
• 機能のキーワード: ligase nuclear cancer ubiquitination, ligase
• 由来する生物種: Homo sapiens (Human); 詳細
• タンパク質・核酸の鎖数: 8
• 化学式量合計: 70080.27

構造登録者

Ostertag, M.S.,Popowicz, G.M.,Sattler, M. (登録日: 2018-11-15, 公開日: 2019-05-08, 最終更新日: 2024-10-23)

主引用文献

Ostertag, M.S.,Hutwelker, W.,Plettenburg, O.,Sattler, M.,Popowicz, G.M.
Structural Insights into BET Client Recognition of Endometrial and Prostate Cancer-Associated SPOP Mutants.
J.Mol.Biol., 431:2213-2221, 2019

PubMed Abstract: BET proteins such as BRD3 are oncogenic transcriptional coactivators. SPOP binding triggers their proteasomal degradation. In both endometrial and prostate cancers, SPOP mutations occur in the MATH domain, but with opposed influence on drug susceptibility. In prostate cancer, SPOP mutations presumably cause increased BET levels, decreasing BET inhibitor drug susceptibility. As opposed, in endometrial cancer, decreased BET levels concomitant with higher BET inhibitor drug susceptibility were observed. Here, we present the to our knowledge first co-crystal structure of SPOP and a bromodomain containing protein (BRD3). Our structural and biophysical data confirm the suggested loss-of-function in prostate cancer-associated SPOP mutants and provide mechanistic explanation. As opposed to previous literature, our data on endometrial cancer-associated SPOP mutants do not show altered binding behavior compared to wild-type SPOP, indicating a more complex regulatory mechanism. SPOP mutation screening may thus be considered a valuable personalized medicine tool for effective antitumor therapy.

PubMed: 31026449
DOI: 10.1016/j.jmb.2019.04.017

実験手法

X-RAY DIFFRACTION (1.85 Å)