2OHF

Crystal structure of human OLA1 in complex with AMPPCP

2OHF の概要

• エントリーDOI: 10.2210/pdb2ohf/pdb
• 分子名称: GTP-binding protein 9, PHOSPHOMETHYLPHOSPHONIC ACID ADENYLATE ESTER (3 entities in total)
• 機能のキーワード: atpase; gtpase; p-loop; obg-like, hydrolase
• 由来する生物種: Homo sapiens (human)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 45314.72

構造登録者

Marquardt, T.,Kostrewa, D. (登録日: 2007-01-10, 公開日: 2007-04-24, 最終更新日: 2023-08-30)

主引用文献

Koller-Eichhorn, R.,Marquardt, T.,Gail, R.,Wittinghofer, A.,Kostrewa, D.,Kutay, U.,Kambach, C.
Human OLA1 defines an ATPase subfamily in the Obg family of GTP-binding proteins
J.Biol.Chem., 282:19928-19937, 2007

PubMed Abstract: Purine nucleotide-binding proteins build the large family of P-loop GTPases and related ATPases, which perform essential functions in all kingdoms of life. The Obg family comprises a group of ancient GTPases belonging to the TRAFAC (for translation factors) class and can be subdivided into several distinct protein subfamilies. The founding member of one of these subfamilies is the bacterial P-loop NTPase YchF, which had so far been assumed to act as GTPase. We have biochemically characterized the human homologue of YchF and found that it binds and hydrolyzes ATP more efficiently than GTP. For this reason, we have termed the protein hOLA1, for human Obg-like ATPase 1. Further biochemical characterization of YchF proteins from different species revealed that ATPase activity is a general but previously missed feature of the YchF subfamily of Obg-like GTPases. To explain ATP specificity of hOLA1, we have solved the x-ray structure of hOLA1 bound to the nonhydrolyzable ATP analogue AMPPCP. Our structural data help to explain the altered nucleotide specificity of YchF homologues and identify the Ola1/YchF subfamily of the Obg-related NTPases as an exceptional example of a single protein subfamily, which has evolved altered nucleotide specificity within a distinct protein family of GTPases.

PubMed: 17430889
DOI: 10.1074/jbc.M700541200

実験手法

X-RAY DIFFRACTION (2.7 Å)