2DQ0

Crystal structure of seryl-tRNA synthetase from Pyrococcus horikoshii complexed with a seryl-adenylate analog

2DQ0 の概要

• エントリーDOI: 10.2210/pdb2dq0/pdb
• 関連するPDBエントリー: 2ZR2 2ZR3
• 分子名称: Seryl-tRNA synthetase, SULFATE ION, 5'-O-(N-(L-SERYL)-SULFAMOYL)ADENOSINE, ... (4 entities in total)
• 機能のキーワード: coiled-coil, homodimer, structural genomics, nppsfa, national project on protein structural and functional analyses, riken structural genomics/proteomics initiative, rsgi, ligase
• 由来する生物種: Pyrococcus horikoshii
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 108223.85

構造登録者

Itoh, Y.,Sekine, S.,Yokoyama, S.,RIKEN Structural Genomics/Proteomics Initiative (RSGI) (登録日: 2006-05-18, 公開日: 2007-06-05, 最終更新日: 2023-10-25)

主引用文献

Itoh, Y.,Sekine, S.,Kuroishi, C.,Terada, T.,Shirouzu, M.,Kuramitsu, S.,Yokoyama, S.
Crystallographic and mutational studies of seryl-tRNA synthetase from the archaeon Pyrococcus horikoshii.
Rna Biol., 5:169-177, 2008

PubMed Abstract: Seryl-tRNA synthetase (SerRS) catalyzes the ligation of serine to the 3'-end of serine tRNA (tRNA(Ser)), which is typical of the type-2 tRNAs characterized by a long extra arm. The SerRSs are divided into two types, the archaeal/eukaryal and bacterial types. In this study, we solved the crystal structures of the SerRS from the archaeon Pyrococcus horikoshii bound with 5'-O-[N-(L-seryl)-sulfamoyl]-adenosine at 2.6 A and with ATP at 2.8 A, as well as in the apo form at 3.0 A. P. horikoshii SerRS recognizes the seryl and adenylate moieties in a manner similar to those of the bacterial and mitochondrial SerRSs from Thermus thermophilus and Bos taurus, respectively, but different from that of the unusual SerRS from the methanogenic archaeon Methanosarcina barkeri. P. horikoshii SerRS efficiently aminoacylated not only P. horikoshii tRNA(Ser) but also bacterial tRNA(Ser)s from T. thermophilus and Escherichia coli. Models of P. horikoshii SerRS bound with the T. thermophilus and P. horikoshii tRNA(Ser)s suggested that the helical domain of P. horikoshii SerRS is involved in the extra arm binding. This region of P. horikoshii SerRS has additional basic residues as compared with T. thermophilus SerRS, and a Trp residue specific to the archaeal/eukaryal SerRSs. Mutational analyses revealed that the basic and Trp residues are important for tRNA aminoacylation. P. horikoshii SerRS has the archaea-specific insertion, which collaborates with the core domain to form a basic channel leading to the active site. Two sulfate ions are bound to the channel, suggesting that the tRNA 3' region might bind to the channel.

PubMed: 18818520
DOI: 10.4161/rna.5.3.6876

実験手法

X-RAY DIFFRACTION (2.6 Å)