7YNV

Crystal structure of photolysed Hen Egg white LYSOZYME introduced with O-(2-nitrobenzyl)-L-tyrosine

7YNV の概要

• エントリーDOI: 10.2210/pdb7ynv/pdb
• 分子名称: Lysozyme C, SODIUM ION, CHLORIDE ION, ... (5 entities in total)
• 機能のキーワード: nonnatural amino acid caged amino acid o-(2-nitrobenzyl)-l-tyrosine lysozyme cell-free protein synthesis, biosynthetic protein
• 由来する生物種: Gallus gallus (chicken)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 14618.51

構造登録者

Hosaka, T.,Shirouzu, M. (登録日: 2022-08-01, 公開日: 2022-09-21, 最終更新日: 2023-11-29)

主引用文献

Hosaka, T.,Katsura, K.,Ishizuka-Katsura, Y.,Hanada, K.,Ito, K.,Tomabechi, Y.,Inoue, M.,Akasaka, R.,Takemoto, C.,Shirouzu, M.
Crystal Structure of an Archaeal Tyrosyl-tRNA Synthetase Bound to Photocaged L-Tyrosine and Its Potential Application to Time-Resolved X-ray Crystallography.
Int J Mol Sci, 23:-, 2022

PubMed Abstract: Genetically encoded caged amino acids can be used to control the dynamics of protein activities and cellular localization in response to external cues. In the present study, we revealed the structural basis for the recognition of -(2-nitrobenzyl)-L-tyrosine (NBTyr) by its specific variant of tyrosyl-tRNA synthetase (NBTyrRS), and then demonstrated its potential availability for time-resolved X-ray crystallography. The substrate-bound crystal structure of NBTyrRS at a 2.79 Å resolution indicated that the replacement of tyrosine and leucine at positions 32 and 65 by glycine (Tyr32Gly and Leu65Gly, respectively) and Asp158Ser created sufficient space for entry of the bulky substitute into the amino acid binding pocket, while Glu in place of Leu162 formed a hydrogen bond with the nitro moiety of NBTyr. We also produced an NBTyr-containing lysozyme through a cell-free protein synthesis system derived from the B95. ΔA strain with the UAG codon reassigned to the nonnatural amino acid. Another crystallographic study of the caged protein showed that the site-specifically incorporated NBTyr was degraded to tyrosine by light irradiation of the crystals. Thus, cell-free protein synthesis of caged proteins with NBTyr could facilitate time-resolved structural analysis of proteins, including medically important membrane proteins.

PubMed: 36142308
DOI: 10.3390/ijms231810399

実験手法

X-RAY DIFFRACTION (1.39 Å)