4CIN

Complex of Bcl-xL with its BH3 domain

4CIN の概要

• エントリーDOI: 10.2210/pdb4cin/pdb
• 関連するPDBエントリー: 4CIM
• 分子名称: BCL-2-LIKE PROTEIN 1, CALCIUM ION, 4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID, ... (6 entities in total)
• 機能のキーワード: apoptosis
• 由来する生物種: HOMO SAPIENS (HUMAN); 詳細
• 細胞内の位置: Isoform Bcl-X(L): Mitochondrion inner membrane : Q07817 Q07817
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 42357.50

構造登録者

Colman, P.M.,Lee, E.F.,Fairlie, W.D. (登録日: 2013-12-12, 公開日: 2014-11-12, 最終更新日: 2023-12-20)

主引用文献

Lee, E.F.,Dewson, G.,Evangelista, M.,Pettikiriarachchi, A.,Zhu, H.,Colman, P.M.,Fairlie, W.D.
The Functional Differences of Pro-Survival and Pro-Apoptotic B Cell Lymphoma 2 (Bcl-2) Proteins Depend on Structural Differences in Their Bcl-2 Homology 3 (Bh3) Domains
J.Biol.Chem., 289:36001-, 2014

PubMed Abstract: Bcl-2 homology 3 (BH3) domains are short sequence motifs that mediate nearly all protein-protein interactions between B cell lymphoma 2 (Bcl-2) family proteins in the intrinsic apoptotic cell death pathway. These sequences are found on both pro-survival and pro-apoptotic members, although their primary function is believed to be associated with induction of cell death. Here, we identify critical features of the BH3 domains of pro-survival proteins that distinguish them functionally from their pro-apoptotic counterparts. Biochemical and x-ray crystallographic studies demonstrate that these differences reduce the capacity of most pro-survival proteins to form high affinity "BH3-in-groove" complexes that are critical for cell death induction. Switching these residues for the corresponding residues in Bcl-2 homologous antagonist/killer (Bak) increases the binding affinity of isolated BH3 domains for pro-survival proteins; however, their exchange in the context of the parental protein causes rapid proteasomal degradation due to protein destabilization. This is supported by further x-ray crystallographic studies that capture elements of this destabilization in one pro-survival protein, Bcl-w. In pro-apoptotic Bak, we demonstrate that the corresponding distinguishing residues are important for its cell-killing capacity and antagonism by pro-survival proteins.

PubMed: 25371206
DOI: 10.1074/JBC.M114.610758

実験手法

X-RAY DIFFRACTION (2.693 Å)