3VRN

Crystal structure of the tyrosine kinase binding domain of Cbl-c

3VRN の概要

• エントリーDOI: 10.2210/pdb3vrn/pdb
• 関連するPDBエントリー: 3VRO 3VRP 3VRQ 3VRR
• 分子名称: Signal transduction protein CBL-C, CALCIUM ION (3 entities in total)
• 機能のキーワード: ptb domain, tkb (tyrosine kinase binding) domain, four-helix bundle (4h), calcium-binding ef hand, divergent sh2 domain, regulator of egfr mediated signal transduction, ubiquitously expressed, protein binding
• 由来する生物種: Homo sapiens (human)
• 細胞内の位置: Nucleus (Potential): Q9ULV8
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 36731.15

構造登録者

Takeshita, K.,Tezuka, T.,Isozaki, Y.,Yamashita, E.,Suzuki, M.,Yamanashi, Y.,Yamamoto, T.,Nakagawa, A. (登録日: 2012-04-13, 公開日: 2013-03-06, 最終更新日: 2023-11-08)

主引用文献

Takeshita, K.,Tezuka, T.,Isozaki, Y.,Yamashita, E.,Suzuki, M.,Kim, M.,Yamanashi, Y.,Yamamoto, T.,Nakagawa, A.
Structural flexibility regulates phosphopeptide-binding activity of the tyrosine kinase binding domain of Cbl-c
J.Biochem., 152:487-495, 2012

PubMed Abstract: Through their ubiquitin ligase activity, Cbl-family proteins suppress signalling mediated by protein-tyrosine kinases (PTKs), but can also function as adaptor proteins to positively regulate signalling. The tyrosine kinase binding (TKB) domain of this family is critical for binding with tyrosine-phosphorylated target proteins. Here, we analysed the crystal structure of the TKB domain of Cbl-c/Cbl-3 (Cbl-c TKB), which is a distinct member of the mammalian Cbl-family. In comparison with Cbl TKB, Cbl-c TKB showed restricted structural flexibility upon phosphopeptide binding. A mutation in Cbl-c TKB augmenting this flexibility enhanced its binding to target phosphoproteins. These results suggest that proteins, post-translational modifications or mutations that alter structural flexibility of the TKB domain of Cbl-family proteins could regulate their binding to target phosphoproteins and thereby, affect PTK-mediated signalling.

PubMed: 22888118
DOI: 10.1093/jb/mvs085

実験手法

X-RAY DIFFRACTION (1.64 Å)