2NXN

T. thermophilus ribosomal protein L11 methyltransferase (PrmA) in complex with ribosomal protein L11

2NXN の概要

• エントリーDOI: 10.2210/pdb2nxn/pdb
• 関連するPDBエントリー: 1ufk 2NXC 2NXE 2NXJ
• 分子名称: Ribosomal protein L11 methyltransferase, 50S ribosomal protein L11 (3 entities in total)
• 機能のキーワード: s-adenosyl-l-methionine dependent methyltransferase, post-translational modification, transferase
• 由来する生物種: Thermus thermophilus; 詳細
• 細胞内の位置: Cytoplasm : Q84BQ9
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 43187.92

構造登録者

Demirci, H.,Gregory, S.T.,Dahlberg, A.E.,Jogl, G. (登録日: 2006-11-17, 公開日: 2006-12-26, 最終更新日: 2023-08-30)

主引用文献

Demirci, H.,Gregory, S.T.,Dahlberg, A.E.,Jogl, G.
Recognition of ribosomal protein L11 by the protein trimethyltransferase PrmA.
Embo J., 26:567-577, 2007

PubMed Abstract: Bacterial ribosomal protein L11 is post-translationally trimethylated at multiple residues by a single methyltransferase, PrmA. Here, we describe four structures of PrmA from the extreme thermophile Thermus thermophilus. Two apo-PrmA structures at 1.59 and 2.3 A resolution and a third with bound cofactor S-adenosyl-L-methionine at 1.75 A each exhibit distinct relative positions of the substrate recognition and catalytic domains, revealing how PrmA can position the L11 substrate for multiple, consecutive side-chain methylation reactions. The fourth structure, the PrmA-L11 enzyme-substrate complex at 2.4 A resolution, illustrates the highly specific interaction of the N-terminal domain with its substrate and places Lys39 in the PrmA active site. The presence of a unique flexible loop in the cofactor-binding site suggests how exchange of AdoMet with the reaction product S-adenosyl-L-homocysteine can occur without necessitating the dissociation of PrmA from L11. Finally, the mode of interaction of PrmA with L11 explains its observed preference for L11 as substrate before its assembly into the 50S ribosomal subunit.

PubMed: 17215866
DOI: 10.1038/sj.emboj.7601508

実験手法

X-RAY DIFFRACTION (2.4 Å)