5UUK

Human Bfl-1 in complex with a Bfl-1-specific selected peptide

5UUK の概要

• エントリーDOI: 10.2210/pdb5uuk/pdb
• 関連するPDBエントリー: 5UUL 5UUM 5UUP
• 分子名称: Bcl-2-related protein A1, Bfl-1-specific selected peptide, SULFATE ION, ... (4 entities in total)
• 機能のキーワード: apoptosis regulatory proteins, peptide library, protein binding, protein structure, proto-oncogene, specificity, bcl2a1, bcl2 related protein a1, peptide inhibitor, apoptosis
• 由来する生物種: Homo sapiens (Human); 詳細
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 20286.97

構造登録者

Jenson, J.M.,Grant, R.A.,Keating, A.E. (登録日: 2017-02-17, 公開日: 2017-06-21, 最終更新日: 2024-10-30)

主引用文献

Jenson, J.M.,Ryan, J.A.,Grant, R.A.,Letai, A.,Keating, A.E.
Epistatic mutations in PUMA BH3 drive an alternate binding mode to potently and selectively inhibit anti-apoptotic Bfl-1.
Elife, 6:-, 2017

PubMed Abstract: Overexpression of anti-apoptotic Bcl-2 family proteins contributes to cancer progression and confers resistance to chemotherapy. Small molecules that target Bcl-2 are used in the clinic to treat leukemia, but tight and selective inhibitors are not available for Bcl-2 paralog Bfl-1. Guided by computational analysis, we designed variants of the native BH3 motif PUMA that are > 150-fold selective for Bfl-1 binding. The designed peptides potently trigger disruption of the mitochondrial outer membrane in cells dependent on Bfl-1, but not in cells dependent on other anti-apoptotic homologs. High-resolution crystal structures show that designed peptide FS2 binds Bfl-1 in a shifted geometry, relative to PUMA and other binding partners, due to a set of epistatic mutations. FS2 modified with an electrophile reacts with a cysteine near the peptide-binding groove to augment specificity. Designed Bfl-1 binders provide reagents for cellular profiling and leads for developing enhanced and cell-permeable peptide or small-molecule inhibitors.

PubMed: 28594323
DOI: 10.7554/eLife.25541

実験手法

X-RAY DIFFRACTION (1.199 Å)