4E0F

Crystallographic structure of trimeric Riboflavin Synthase from Brucella abortus in complex with riboflavin

4E0F の概要

• エントリーDOI: 10.2210/pdb4e0f/pdb
• 関連するPDBエントリー: 1I8D 1KZL
• 分子名称: Riboflavin synthase subunit alpha, RIBOFLAVIN (3 entities in total)
• 機能のキーワード: beta barrel, alpha + beta protein, riboflavin biosynthesis, transferase
• 由来する生物種: Brucella abortus
• タンパク質・核酸の鎖数: 3
• 化学式量合計: 70337.45

構造登録者

Serer, M.I.,Bonomi, H.R.,Guimaraes, B.G.,Rossi, R.C.,Goldbaum, F.A.,Klinke, S. (登録日: 2012-03-03, 公開日: 2013-10-16, 最終更新日: 2023-09-13)

主引用文献

Serer, M.I.,Bonomi, H.R.,Guimaraes, B.G.,Rossi, R.C.,Goldbaum, F.A.,Klinke, S.
Crystallographic and kinetic study of riboflavin synthase from Brucella abortus, a chemotherapeutic target with an enhanced intrinsic flexibility.
Acta Crystallogr.,Sect.D, 70:1419-1434, 2014

PubMed Abstract: Riboflavin synthase (RS) catalyzes the last step of riboflavin biosynthesis in microorganisms and plants, which corresponds to the dismutation of two molecules of 6,7-dimethyl-8-ribityllumazine to yield one molecule of riboflavin and one molecule of 5-amino-6-ribitylamino-2,4(1H,3H)-pyrimidinedione. Owing to the absence of this enzyme in animals and the fact that most pathogenic bacteria show a strict dependence on riboflavin biosynthesis, RS has been proposed as a potential target for antimicrobial drug development. Eubacterial, fungal and plant RSs assemble as homotrimers lacking C3 symmetry. Each monomer can bind two substrate molecules, yet there is only one active site for the whole enzyme, which is located at the interface between two neighbouring chains. This work reports the crystallographic structure of RS from the pathogenic bacterium Brucella abortus (the aetiological agent of the disease brucellosis) in its apo form, in complex with riboflavin and in complex with two different product analogues, being the first time that the structure of an intact RS trimer with bound ligands has been solved. These crystal models support the hypothesis of enhanced flexibility in the particle and also highlight the role of the ligands in assembling the unique active site. Kinetic and binding studies were also performed to complement these findings. The structural and biochemical information generated may be useful for the rational design of novel RS inhibitors with antimicrobial activity.

PubMed: 24816110
DOI: 10.1107/S1399004714005161

実験手法

X-RAY DIFFRACTION (2.85 Å)