4CXQ

Mycobaterium tuberculosis transaminase BioA complexed with substrate KAPA

「4MQN」から置き換えられました

4CXQ の概要

• エントリーDOI: 10.2210/pdb4cxq/pdb
• 関連するPDBエントリー: 4CXR 4MQP 4MQQ 4MQR
• 分子名称: ADENOSYLMETHIONINE-8-AMINO-7-OXONONANOATE AMINOTRANSFERASE, PYRIDOXAL-5'-PHOSPHATE, 7-KETO-8-AMINOPELARGONIC ACID, ... (6 entities in total)
• 機能のキーワード: transferase, transaminase, tuberculosis
• 由来する生物種: MYCOBACTERIUM TUBERCULOSIS
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 98340.24

構造登録者

Dai, R.,Wilson, D.J.,Geders, T.W.,Aldrich, C.C.,Finzel, B.C. (登録日: 2014-04-08, 公開日: 2014-04-23, 最終更新日: 2023-12-20)

主引用文献

Dai, R.,Wilson, D.J.,Geders, T.W.,Aldrich, C.C.,Finzel, B.C.
Inhibition of Mycobacterium Tuberculosis Transaminase Bioa by Aryl Hydrazines and Hydrazides.
Chembiochem, 15:575-, 2014

PubMed Abstract: 7,8-Diaminopelargonic acid synthase (BioA) of Mycobacterium tuberculosis is a recently validated target for therapeutic intervention in the treatment of tuberculosis (TB). Using biophysical fragment screening and structural characterization of compounds, we have identified a potent aryl hydrazine inhibitor of BioA that reversibly modifies the pyridoxal-5'-phosphate (PLP) cofactor, forming a stable quinonoid. Analogous hydrazides also form covalent adducts that can be observed crystallographically but are incapable of inactivating the enzyme. In the X-ray crystal structures, small molecules induce unexpected conformational remodeling in the substrate binding site. We compared these conformational changes to those induced upon binding of the substrate (7-keto-8-aminopelargonic acid), and characterized the inhibition kinetics and the X-ray crystal structures of BioA with the hydrazine compound and analogues to unveil the mechanism of this reversible covalent modification.

PubMed: 24482078
DOI: 10.1002/CBIC.201300748

実験手法

X-RAY DIFFRACTION (1.8 Å)