4XLX

Crystal structure of BjKS from Bradyrhizobium japonicum

4XLX の概要

• エントリーDOI: 10.2210/pdb4xlx/pdb
• 関連するPDBエントリー: 3W3F 3W3H 3WBV 4XLY
• 分子名称: Uncharacterized protein blr2150 (2 entities in total)
• 機能のキーワード: diterpene synthases, hydrolase
• 由来する生物種: Bradyrhizobium diazoefficiens (strain JCM 10833 / IAM 13628 / NBRC 14792 / USDA 110)
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 133671.98

構造登録者

Hu, Y.,Zheng, Y.,Ko, T.P.,Liu, W.,Guo, R.T. (登録日: 2015-01-14, 公開日: 2015-02-04, 最終更新日: 2023-11-08)

主引用文献

Liu, W.,Feng, X.,Zheng, Y.,Huang, C.H.,Nakano, C.,Hoshino, T.,Bogue, S.,Ko, T.P.,Chen, C.C.,Cui, Y.,Li, J.,Wang, I.,Hsu, S.T.,Oldfield, E.,Guo, R.T.
Structure, function and inhibition of ent-kaurene synthase from Bradyrhizobium japonicum.
Sci Rep, 4:6214-, 2014

PubMed Abstract: We report the first X-ray crystal structure of ent-kaur-16-ene synthase from Bradyrhizobium japonicum, together with the results of a site-directed mutagenesis investigation into catalytic activity. The structure is very similar to that of the α domains of modern plant terpene cyclases, a result that is of interest since it has been proposed that many plant terpene cyclases may have arisen from bacterial diterpene cyclases. The ent-copalyl diphosphate substrate binds to a hydrophobic pocket near a cluster of Asp and Arg residues that are essential for catalysis, with the carbocations formed on ionization being protected by Leu, Tyr and Phe residues. A bisphosphonate inhibitor binds to the same site. In the kaurene synthase from the moss Physcomitrella patens, 16-α-hydroxy-ent-kaurane as well as kaurene are produced since Leu and Tyr in the P. patens kaurene synthase active site are replaced by smaller residues enabling carbocation quenching by water. Overall, the results represent the first structure determination of a bacterial diterpene cyclase, providing insights into catalytic activity, as well as structural comparisons with diverse terpene synthases and cyclases which clearly separate the terpene cyclases from other terpene synthases having highly α-helical structures.

PubMed: 25269599
DOI: 10.1038/srep06214

実験手法

X-RAY DIFFRACTION (2 Å)