2OML

crystal structure of E. coli pseudouridine synthase RluE

2OML の概要

• エントリーDOI: 10.2210/pdb2oml/pdb
• 関連するPDBエントリー: 2OLW
• 分子名称: Ribosomal large subunit pseudouridine synthase E, SULFATE ION (3 entities in total)
• 機能のキーワード: bifurcated beta sheet, thrombin-cleaved, isomerase
• 由来する生物種: Escherichia coli
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 22016.72

構造登録者

Pan, H.,Ho, J.D.,Stroud, R.M.,Finer-Moore, J. (登録日: 2007-01-22, 公開日: 2007-03-13, 最終更新日: 2023-08-30)

主引用文献

Pan, H.,Ho, J.D.,Stroud, R.M.,Finer-Moore, J.
The Crystal Structure of E. coli rRNA Pseudouridine Synthase RluE.
J.Mol.Biol., 367:1459-1470, 2007

PubMed Abstract: Pseudouridine synthase RluE modifies U2457 in a stem of 23 S RNA in Escherichia coli. This modification is located in the peptidyl transferase center of the ribosome. We determined the crystal structures of the C-terminal, catalytic domain of E. coli RluE at 1.2 A resolution and of full-length RluE at 1.6 A resolution. The crystals of the full-length enzyme contain two molecules in the asymmetric unit and in both molecules the N-terminal domain is disordered. The protein has an active site cleft, conserved in all other pseudouridine synthases, that contains invariant Asp and Tyr residues implicated in catalysis. An electropositive surface patch that covers the active site cleft is just wide enough to accommodate an RNA stem. The RNA substrate stem can be docked to this surface such that the catalytic Asp is adjacent to the target base, and a conserved Arg is positioned to help flip the target base out of the stem into the enzyme active site. A flexible RluE specific loop lies close to the conserved region of the stem in the model, and may contribute to substrate specificity. The stem alone is not a good RluE substrate, suggesting RluE makes additional interactions with other regions in the ribosome.

PubMed: 17320904
DOI: 10.1016/j.jmb.2007.01.084

実験手法

X-RAY DIFFRACTION (1.2 Å)