8C3H

Cereblon isoform 4 from Magnetospirillum gryphiswaldense in complex a long aspartimide degron peptide

8C3H の概要

• エントリーDOI: 10.2210/pdb8c3h/pdb
• 分子名称: Cereblon isoform 4, P3(40), ZINC ION, ... (4 entities in total)
• 機能のキーワード: protein damage, protein ageing, protein chain break, aspartimide, signaling protein
• 由来する生物種: Magnetospirillum gryphiswaldense; 詳細
• タンパク質・核酸の鎖数: 5
• 化学式量合計: 43202.12

構造登録者

Heim, C.,Spring, A.K.,Hartmann, M.D. (登録日: 2022-12-23, 公開日: 2023-02-08, 最終更新日: 2024-11-13)

主引用文献

Heim, C.,Spring, A.K.,Kirchgassner, S.,Schwarzer, D.,Hartmann, M.D.
Cereblon neo-substrate binding mimics the recognition of the cyclic imide degron.
Biochem.Biophys.Res.Commun., 646:30-35, 2023

PubMed Abstract: In targeted protein degradation, immunomodulatory drugs (IMiDs) or cereblon (CRBN) E3 ligase modulatory drugs (CELMoDs) recruit neo-substrate proteins to the E3 ubiquitin ligase receptor CRBN for ubiquitination and subsequent proteasomal degradation. While the structural basis of this mechanism is generally understood, we have only recently described the recognition mode of the natural CRBN degron. In this communication, we reveal that the IMiD- or CELMoD-mediated binding of neo-substrates closely mimics the recognition of natural degrons. In crystal structures, we identify a conserved binding mode for natural degron peptides with an elaborate hydrogen bonding network involving the backbone of each of the six C-terminal degron residues, without the involvement of side chains. In a structural comparison, we show that neo-substrates recruited by IMiDs or CELMoDs emulate every single hydrogen bond of this network and thereby explain the origins of the largely sequence-independent recognition of neo-substrates. Our results imply that the V388I substitution in CRBN does not impair natural degron recognition and complete the structural basis for the rational design of CRBN effectors.

PubMed: 36701892
DOI: 10.1016/j.bbrc.2023.01.051

実験手法

X-RAY DIFFRACTION (1.71 Å)