EC Explorer

4.2.1.117

2-methylcitrate dehydratase (2-methyl-trans-aconitate forming)

(2S,3S)-2-methylcitrate = 2-methyl-trans-aconitate + H₂O

(2S,3S)-2-hydroxybutane-1,2,3-tricarboxylate hydro-lyase (2-methyl-trans-aconitate-forming)

Catalyses the dehydration of (2S,3S)-2-methylcitrate, forming the trans isomer of 2-methyl-aconitate (unlike EC 4.2.1.79, which forms only the cis isomer). Part of a propionate degradation pathway. The enzyme from Shewanella oneidensis can also accept citrate and cis-aconitate, but activity with (2S,3S)-2-methylcitrate was approximately 2.5-fold higher. 2-methylisocitrate and isocitrate were not substrates [1]. An iron-sulfur protein.

created 2009