2C19

5-(4-Carboxy-2-oxo-butylsulfanyl)-4-oxo-pentanoic acid acid bound to Porphobilinogen synthase from Pseudomonas aeruginosa

2C19 の概要

• エントリーDOI: 10.2210/pdb2c19/pdb
• 関連するPDBエントリー: 1B4K 1GZG 1W54 1W56 1W5M 1W5N 1W5O 1W5P 1W5Q 2C13 2C14 2C15 2C18
• 分子名称: DELTA-AMINOLEVULINIC ACID DEHYDRATASE, MAGNESIUM ION, SODIUM ION, ... (4 entities in total)
• 機能のキーワード: enzyme mechanism, metalloenzyme, porphobilinogen synthase, cocrystallization, lyase, porphyrin biosynthesis
• 由来する生物種: PSEUDOMONAS AERUGINOSA
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 74676.89

構造登録者

Frere, F.,Nentwich, M.,Gacond, S.,Heinz, D.W.,Neier, R.,Frankenberg-Dinkel, N. (登録日: 2005-09-11, 公開日: 2006-06-20, 最終更新日: 2024-11-06)

主引用文献

Frere, F.,Nentwich, M.,Gacond, S.,Heinz, D.W.,Neier, R.,Frankenberg-Dinkel, N.
Probing the Active Site of Pseudomonas Aeruginosa Porphobilinogen Synthase Using Newly Developed Inhibitors.
Biochemistry, 45:8243-, 2006

PubMed Abstract: Porphobilinogen synthase catalyzes the first committed step of the tetrapyrrole biosynthesis pathway. In an aldol-like condensation, two molecules of 5-aminolevulinic acid (ALA) form the first pyrrole, porphobilinogen. Newly synthesized analogues of a reaction intermediate of porphobilinogen synthase have been employed in studying the active site and the catalytic mechanism of this early enzyme of tetrapyrrole biosynthesis. This study combines structural and kinetic evaluation of the inhibition potency of these inhibitors. In addition, one of the determined protein structures provides for the first time structural evidence of a magnesium ion in the active site. From these results, we can corroborate an earlier postulated enzymatic mechanism that starts with formation of a C-C bond, linking C3 of the A-side ALA to C4 of the P-side ALA through an aldole addition. The obtained data are discussed with respect to the current literature.

PubMed: 16819823
DOI: 10.1021/BI052611F

実験手法

X-RAY DIFFRACTION (2.05 Å)