7CMO

Crystal structure of human inorganic pyrophosphatase

7CMO の概要

• エントリーDOI: 10.2210/pdb7cmo/pdb
• 分子名称: Inorganic pyrophosphatase (1 entity in total)
• 機能のキーワード: complex, monomer, hydrolase
• 由来する生物種: Homo sapiens (Human)
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 130820.15

構造登録者

Hu, F.,Huang, Z.,Li, L. (登録日: 2020-07-28, 公開日: 2020-10-21, 最終更新日: 2024-10-16)

主引用文献

Hu, F.,Huang, Z.,Zheng, S.,Wu, Q.,Chen, Y.,Lin, H.,Huang, W.,Li, L.
Structural and biochemical characterization of inorganic pyrophosphatase from Homo sapiens.
Biochem.Biophys.Res.Commun., 533:1115-1121, 2020

PubMed Abstract: Inorganic pyrophosphatase (PPase) plays an essential role in energy conservation and provides energy for many biosynthetic pathways. Here, we present two three-dimensional structures of PPase from Homo sapiens (Hu-PPase) at 2.38 Å and 3.40 Å in different crystallization conditions. One of the Hu-PPase structures complex of two magnesium metal ions was determined to be a monomer (Hu-PPase-mono) here, while the other one to be a dimer-dimer (Hu-PPase-dd). In each asymmetric unit of Hu-PPase-mono, there are four α-helices and ten β-strands and folds as a barrel structure, and the active site contains two magnesium ions. Like PPases from many species, we found that Hu-PPase was able to undergo self-assembly. To our surprise, disruption of the self-assembly of Hu-PPase did not influence its enzymatic activity or the ability to promote cell growth. Our work uncovered that different structure forms of Hu-PPase and found that the pyrophosphatase activity of Hu-PPase is independent of its self-assembly.

PubMed: 33036755
DOI: 10.1016/j.bbrc.2020.09.139

実験手法

X-RAY DIFFRACTION (3.4 Å)