Butylmalonate is a transition state analogue for aminocylase I

FEBS Letters

Röhm, Klaus-Heinrich¹ 

[1]Institut für Physiologische Chemie der Philipps-Universität, D-3550 Marburg (Lahn, FRG

关键词: Aminoacylase;    Reaction mechanism;    Inhibitor;    Transition state;    (Hog kidney);   

DOI  :  10.1016/0014-5793(89)80718-5

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

Butylmalonate (butyl propanedioic acid) is a slow-binding inhibitor of porcine renal aminoacylase I (EC 3.5.1.14), causing transients of activity with half-times of more than 10 min. At 25°C and pH 7.0, the dissociation rate of the complex is approximately 6 × 10⁻⁴ s⁻¹, while the rate constant of complex formation is in the order of 20 M⁻¹·s⁻¹. In good agreement with these data, steady-state kinetics yield an estimated inhibition constant around 100 μM. Molecular mechanics calculations showed that conformation and charge distribution of butylmalonate are strikingly similar to those of the putative transition state of aminoacylase catalysis.

【 授权许可】

Unknown