1NVE

Crystal structure of 3-dehydroquinate synthase (DHQS) in complex with ZN2+ and NAD

1NVE の概要

• エントリーDOI: 10.2210/pdb1nve/pdb
• 関連するPDBエントリー: 1NR5 1NRX 1NUA 1NVA 1NVB 1NVD 1NVF
• 分子名称: 3-DEHYDROQUINATE SYNTHASE, ZINC ION, CHLORIDE ION, ... (5 entities in total)
• 機能のキーワード: shikimate pathway, aromatic amino acid biosynthesis, dhqs, open form, form e, domain movement, cyclase, lyase
• 由来する生物種: Emericella nidulans
• 細胞内の位置: Cytoplasm: P07547
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 174852.38

構造登録者

Nichols, C.E.,Ren, J.,Lamb, H.K.,Hawkins, A.R.,Stammers, D.K. (登録日: 2003-02-03, 公開日: 2003-03-18, 最終更新日: 2023-10-25)

主引用文献

Nichols, C.E.,Ren, J.,Lamb, H.K.,Hawkins, A.R.,Stammers, D.K.
Ligand-induced Conformational Changes and a Mechanism for Domain Closure in Aspergillus nidulans Dehydroquinate Synthase
J.MOL.BIOL., 327:129-144, 2003

PubMed Abstract: In order to investigate systematically substrate and cofactor-induced conformational changes in the enzyme dehydroquinate synthase (DHQS), eight structures representing a series of differently liganded states have been determined in a total of six crystal forms. DHQS in the absence of the substrate analogue carbaphosphonate, either unliganded or in the presence of NAD or ADP, is in an open form where a relative rotation of 11-13 degrees between N and C-terminal domains occurs. Analysis of torsion angle difference plots between sets of structures reveals eight rearrangements that appear relevant to domain closure and a further six related to crystal packing. Overlapping 21 different copies of the individual N and C-terminal DHQS domains further reveals a series of pivot points about which these movements occur and illustrates the way in which widely separated secondary structure elements are mechanically inter-linked to form "composite elements", which propagate structural changes across large distances. This analysis has provided insight into the basis of DHQS ligand-initiated domain closure and gives rise to the proposal of an ordered sequence of events involving substrate binding, and local rearrangements within the active site that are propagated to the hinge regions, leading to closure of the active-site cleft.

PubMed: 12614613
DOI: 10.1016/S0022-2836(03)00086-X

実験手法

X-RAY DIFFRACTION (2.58 Å)