2QES

Crystal structure of the ribosome inactivating protein PDL4 from P. dioica leaves in complex with adenine

2QES の概要

• エントリーDOI: 10.2210/pdb2qes/pdb
• 関連するPDBエントリー: 2QET 2z4u 2z53
• 分子名称: Ribosome-inactivating protein PD-L4, ADENINE (3 entities in total)
• 機能のキーワード: crystal, ribosome inactivating protein, hydrolase
• 由来する生物種: Phytolacca dioica
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 29356.24

構造登録者

Ruggiero, A.,Berisio, R. (登録日: 2007-06-26, 公開日: 2008-02-26, 最終更新日: 2024-11-06)

主引用文献

Ruggiero, A.,Chambery, A.,Di Maro, A.,Parente, A.,Berisio, R.
Atomic resolution (1.1 A) structure of the ribosome-inactivating protein PD-L4 from Phytolacca dioica L. leaves
Proteins, 71:8-15, 2008

PubMed Abstract: The ribosome inactivating protein PD-L4 from Phytolacca dioica is a N-beta-glycosidase, probably involved in plant defence. The crystal structures of wild type PD-L4 and of the S211A PD-L4 mutant with significantly decreased catalytic activity were determined at atomic resolution. To determine the structural determinants for the reduced activity of S211A PD-L4, both forms have also been co-crystallized with adenine, the major product of PD-L4 catalytic reaction. In the structure of the S211A mutant, the cavity formed by the lack of the Ser hydroxyl group is filled by a water molecule; the insertion of this non-isosteric group leads to small albeit concerted changes in the tightly packed active site of the enzyme. These changes have been correlated to the different activity of the mutant enzyme. This work highlights the importance of atomic resolution studies for the deep understanding of enzymatic properties.

PubMed: 17963235
DOI: 10.1002/prot.21712

実験手法

X-RAY DIFFRACTION (1.24 Å)