1DOF

THE CRYSTAL STRUCTURE OF ADENYLOSUCCINATE LYASE FROM PYROBACULUM AEROPHILUM: INSIGHTS INTO THERMAL STABILITY AND HUMAN PATHOLOGY

1DOF の概要

• エントリーDOI: 10.2210/pdb1dof/pdb
• 関連するPDBエントリー: 1c3c 1c3u
• 分子名称: ADENYLOSUCCINATE LYASE (2 entities in total)
• 機能のキーワード: purine biosynthesis, lyase
• 由来する生物種: Pyrobaculum aerophilum
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 181693.00

構造登録者

Toth, E.A.,Yeates, T.O.,Goedken, E.,Dixon, J.E.,Marqusee, S. (登録日: 1999-12-20, 公開日: 2001-01-10, 最終更新日: 2024-11-13)

主引用文献

Toth, E.A.,Worby, C.,Dixon, J.E.,Goedken, E.R.,Marqusee, S.,Yeates, T.O.
The crystal structure of adenylosuccinate lyase from Pyrobaculum aerophilum reveals an intracellular protein with three disulfide bonds.
J.Mol.Biol., 301:433-450, 2000

PubMed Abstract: Adenylosuccinate lyase catalyzes two separate reactions in the de novo purine biosynthetic pathway. Through its dual action in this pathway, adenylosuccinate lyase plays an integral part in cellular replication and metabolism. Mutations in the human enzyme can result in severe neurological disorders, including mental retardation with autistic features. The crystal structure of adenylosuccinate lyase from the hyperthermophilic archaebacterium Pyrobaculum aerophilum has been determined to 2.1 A resolution. Although both the fold of the monomer and the architecture of the tetrameric assembly are similar to adenylosuccinate lyase from the thermophilic eubacterium Thermotoga maritima, the archaebacterial lyase contains unique features. Surprisingly, the structure of adenylosuccinate lyase from P. aerophilum reveals that this intracellular protein contains three disulfide bonds that contribute significantly to its stability against thermal and chemical denaturation. The observation of multiple disulfide bonds in the recombinant form of the enzyme suggests the need for further investigations into whether the intracellular environment of P. aerophilum, and possibly other hyperthermophiles, may be compatible with protein disulfide bond formation. In addition, the protein is shorter in P. aerophilum than it is in other organisms. This abbreviation results from an internal excision of a cluster of helices that may be involved in protein-protein interactions in other organisms and may relate to the observed clinical effects of human mutations in that region.

PubMed: 10926519
DOI: 10.1006/jmbi.2000.3970

実験手法

X-RAY DIFFRACTION (2.1 Å)