3WOY

Crystal structure of CLASP2 TOG domain (TOG2)

3WOY の概要

• エントリーDOI: 10.2210/pdb3woy/pdb
• 関連するPDBエントリー: 3woz
• 分子名称: CLIP-associating protein 2 (2 entities in total)
• 機能のキーワード: heat repeat, microtubule binding, tubulin, unknown, microtubule, structural protein
• 由来する生物種: Homo sapiens (human)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 28182.20

構造登録者

Hayashi, I.,Maki, T. (登録日: 2014-01-06, 公開日: 2015-05-27, 最終更新日: 2024-03-20)

主引用文献

Maki, T.,Grimaldi, A.D.,Fuchigami, S.,Kaverina, I.,Hayashi, I.
CLASP2 Has Two Distinct TOG Domains That Contribute Differently to Microtubule Dynamics
J. Mol. Biol., 427:2379-2395, 2015

PubMed Abstract: CLIP-associated proteins CLASPs are mammalian microtubule (MT) plus-end tracking proteins (+TIPs) that promote MT rescue in vivo. Their plus-end localization is dependent on other +TIPs, EB1 and CLIP-170, but in the leading edge of the cell, CLASPs display lattice-binding activity. MT association of CLASPs is suggested to be regulated by multiple TOG (tumor overexpressed gene) domains and by the serine-arginine (SR)-rich region, which contains binding sites for EB1. Here, we report the crystal structures of the two TOG domains of CLASP2. Both domains consist of six HEAT repeats, which are similar to the canonical paddle-like tubulin-binding TOG domains, but have arched conformations. The degrees and directions of curvature are different between the two TOG domains, implying that they have distinct roles in MT binding. Using biochemical, molecular modeling and cell biological analyses, we have investigated the interactions between the TOG domains and αβ-tubulin and found that each domain associates differently with αβ-tubulin. Our findings suggest that, by varying the degrees of domain curvature, the TOG domains may distinguish the structural conformation of the tubulin dimer, discriminate between different states of MT dynamic instability and thereby function differentially as stabilizers of MTs.

PubMed: 26003921
DOI: 10.1016/j.jmb.2015.05.012

実験手法

X-RAY DIFFRACTION (2.1 Å)