3N59

Type II dehydroquinase from Mycobacterium Tuberculosis complexed with 3-dehydroshikimate

3N59 の概要

• エントリーDOI: 10.2210/pdb3n59/pdb
• 関連するPDBエントリー: 1h05 1h0r 1h0s 2dhq
• 分子名称: 3-dehydroquinate dehydratase, CHLORIDE ION, (4S,5R)-4,5-dihydroxy-3-oxocyclohex-1-ene-1-carboxylic acid, ... (4 entities in total)
• 機能のキーワード: dehydratase, shikimate pathway, lyase, aromatic amino acid biosynthesis, tuberculosis, drug target, 3-dehydroshikimate, structural genomics, tb structural genomics consortium, tbsgc
• 由来する生物種: Mycobacterium tuberculosis
• タンパク質・核酸の鎖数: 24
• 化学式量合計: 448793.87

構造登録者

Snee, W.C.,Palaninathan, S.K.,Sacchettini, J.C.,Dias, M.V.B.,Bromfield, K.M.,Payne, R.,Ciulli, A.,Howard, N.I.,Abell, C.,Blundell, T.L.,TB Structural Genomics Consortium (TBSGC) (登録日: 2010-05-24, 公開日: 2010-07-21, 最終更新日: 2023-09-06)

主引用文献

Dias, M.V.,Snee, W.C.,Bromfield, K.M.,Payne, R.J.,Palaninathan, S.K.,Ciulli, A.,Howard, N.I.,Abell, C.,Sacchettini, J.C.,Blundell, T.L.
Structural investigation of inhibitor designs targeting 3-dehydroquinate dehydratase from the shikimate pathway of Mycobacterium tuberculosis.
Biochem.J., 436:729-739, 2011

PubMed Abstract: The shikimate pathway is essential in Mycobacterium tuberculosis and its absence from humans makes the enzymes of this pathway potential drug targets. In the present paper, we provide structural insights into ligand and inhibitor binding to 3-dehydroquinate dehydratase (dehydroquinase) from M. tuberculosis (MtDHQase), the third enzyme of the shikimate pathway. The enzyme has been crystallized in complex with its reaction product, 3-dehydroshikimate, and with six different competitive inhibitors. The inhibitor 2,3-anhydroquinate mimics the flattened enol/enolate reaction intermediate and serves as an anchor molecule for four of the inhibitors investigated. MtDHQase also forms a complex with citrazinic acid, a planar analogue of the reaction product. The structure of MtDHQase in complex with a 2,3-anhydroquinate moiety attached to a biaryl group shows that this group extends to an active-site subpocket inducing significant structural rearrangement. The flexible extensions of inhibitors designed to form π-stacking interactions with the catalytic Tyr24 have been investigated. The high-resolution crystal structures of the MtDHQase complexes provide structural evidence for the role of the loop residues 19-24 in MtDHQase ligand binding and catalytic mechanism and provide a rationale for the design and efficacy of inhibitors.

PubMed: 21410435
DOI: 10.1042/BJ20110002

実験手法

X-RAY DIFFRACTION (2.52 Å)