3X0N

ADP ribose pyrophosphatase from Thermus thermophilus HB8 in ESM-state at reaction time of 6 min

3X0N の概要

• エントリーDOI: 10.2210/pdb3x0n/pdb
• 関連するPDBエントリー: 3X0I 3X0J 3X0K 3X0L 3X0M 3X0O 3X0P 3X0Q 3X0R 3X0S
• 分子名称: ADP-ribose pyrophosphatase, [(2R,3S,4R,5R)-5-(6-AMINOPURIN-9-YL)-3,4-DIHYDROXY-OXOLAN-2-YL]METHYL [HYDROXY-[[(2R,3S,4R,5S)-3,4,5-TRIHYDROXYOXOLAN-2-YL]METHOXY]PHOSPHORYL] HYDROGEN PHOSPHATE, MANGANESE (II) ION, ... (6 entities in total)
• 機能のキーワード: nudix motif, adp ribose hydrolase, adp ribose, cytosol, hydrolase
• 由来する生物種: Thermus thermophilus HB8
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 20090.32

構造登録者

Furuike, Y.,Akita, Y.,Miyahara, I.,Kamiya, N. (登録日: 2014-10-17, 公開日: 2016-04-27, 最終更新日: 2023-11-08)

主引用文献

Furuike, Y.,Akita, Y.,Miyahara, I.,Kamiya, N.
ADP-Ribose Pyrophosphatase Reaction in Crystalline State Conducted by Consecutive Binding of Two Manganese(II) Ions as Cofactors
Biochemistry, 55:1801-1812, 2016

PubMed Abstract: Adenosine diphosphate ribose pyrophosphatase (ADPRase), a member of the Nudix family proteins, catalyzes the metal-induced and concerted general acid-base hydrolysis of ADP ribose (ADPR) into AMP and ribose-5'-phosphate (R5P). The ADPR-hydrolysis reaction of ADPRase from Thermus thermophilus HB8 (TtADPRase) requires divalent metal cations such as Mn(2+), Zn(2+), or Mg(2+) as cofactors. Here, we report the reaction pathway observed in the catalytic center of TtADPRase, based on cryo-trapping X-ray crystallography at atomic resolutions around 1.0 Å using Mn(2+) as the reaction trigger, which was soaked into TtADPRase-ADPR binary complex crystals. Integrating 11 structures along the reaction timeline, five reaction states of TtADPRase were assigned, which were ADPRase alone (E), the ADPRase-ADPR binary complex (ES), two ADPRase-ADPR-Mn(2+) reaction intermediates (ESM, ESMM), and the postreaction state (E'). Two Mn(2+) ions were inserted consecutively into the catalytic center of the ES-state and ligated by Glu86 and Glu82, which are highly conserved among the Nudix family, in the ESM- and ESMM-states. The ADPR-hydrolysis reaction was characterized by electrostatic, proximity, and orientation effects, and by preferential binding for the transition state. A new reaction mechanism is proposed, which differs from previous ones suggested from structure analyses with nonhydrolyzable substrate analogues or point-mutated ADPRases.

PubMed: 26979298
DOI: 10.1021/acs.biochem.5b00886

実験手法

X-RAY DIFFRACTION (1.12 Å)