4P3E

Structure of the human SRP S domain

4P3E の概要

• エントリーDOI: 10.2210/pdb4p3e/pdb
• 関連するPDBエントリー: 4P3F 4P3G
• 分子名称: SRP RNA (124-mer), Signal recognition particle 19 kDa protein, Signal recognition particle subunit SRP68, ... (4 entities in total)
• 機能のキーワード: srp, srp rna, srp19, srp68, ribonucleoprotein particle (rnp), arginine-rich motif (arm), rna binding protein-rna complex, rna binding protein/rna
• 由来する生物種: Homo sapiens (Human); 詳細
• タンパク質・核酸の鎖数: 3
• 化学式量合計: 81041.70

構造登録者

Grotwinkel, J.T.,Wild, K.,Sinning, I. (登録日: 2014-03-07, 公開日: 2014-04-16, 最終更新日: 2023-09-27)

主引用文献

Grotwinkel, J.T.,Wild, K.,Segnitz, B.,Sinning, I.
SRP RNA remodeling by SRP68 explains its role in protein translocation.
Science, 344:101-104, 2014

PubMed Abstract: The signal recognition particle (SRP) is central to membrane protein targeting; SRP RNA is essential for SRP assembly, elongation arrest, and activation of SRP guanosine triphosphatases. In eukaryotes, SRP function relies on the SRP68-SRP72 heterodimer. We present the crystal structures of the RNA-binding domain of SRP68 (SRP68-RBD) alone and in complex with SRP RNA and SRP19. SRP68-RBD is a tetratricopeptide-like module that binds to a RNA three-way junction, bends the RNA, and inserts an α-helical arginine-rich motif (ARM) into the major groove. The ARM opens the conserved 5f RNA loop, which in ribosome-bound SRP establishes a contact to ribosomal RNA. Our data provide the structural basis for eukaryote-specific, SRP68-driven RNA remodeling required for protein translocation.

PubMed: 24700861
DOI: 10.1126/science.1249094

実験手法

X-RAY DIFFRACTION (3.5 Å)