6HCI

Crystal structure of titin M3 domain

6HCI の概要

• エントリーDOI: 10.2210/pdb6hci/pdb
• 分子名称: Titin, SULFATE ION (3 entities in total)
• 機能のキーワード: titin, ig domains, sarcomere, m-band, transferase
• 由来する生物種: Homo sapiens (Human)
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 47861.54

構造登録者

Chatziefthimiou, S.D.,Ugurlar, D.,Wilmanns, M. (登録日: 2018-08-15, 公開日: 2019-08-28, 最終更新日: 2024-05-01)

主引用文献

Chatziefthimiou, S.D.,Hornburg, P.,Sauer, F.,Mueller, S.,Ugurlar, D.,Xu, E.R.,Wilmanns, M.
Structural diversity in the atomic resolution 3D fingerprint of the titin M-band segment.
Plos One, 14:e0226693-e0226693, 2019

PubMed Abstract: In striated muscles, molecular filaments are largely composed of long protein chains with extensive arrays of identically folded domains, referred to as "beads-on-a-string". It remains a largely unresolved question how these domains have developed a unique molecular profile such that each carries out a distinct function without false-positive readout. This study focuses on the M-band segment of the sarcomeric protein titin, which comprises ten identically folded immunoglobulin domains. Comparative analysis of high-resolution structures of six of these domains ‒ M1, M3, M4, M5, M7, and M10 ‒ reveals considerable structural diversity within three distinct loops and a non-conserved pattern of exposed cysteines. Our data allow to structurally interpreting distinct pathological readouts that result from titinopathy-associated variants. Our findings support general principles that could be used to identify individual structural/functional profiles of hundreds of identically folded protein domains within the sarcomere and other densely crowded cellular environments.

PubMed: 31856237
DOI: 10.1371/journal.pone.0226693

実験手法

X-RAY DIFFRACTION (2.12 Å)