Protein
(R)-2-hydroxyisocaproyl-CoA dehydratase alpha subunit
Organism
Clostridioides difficile
Function
Involved in the reductive branch of L-leucine fermentation. Catalyzes the irreversible beta/alpha-elimination of water from (R)-2-hydroxyisocaproyl-CoA to yield isocaprenoyl-CoA. This beta/alpha-dehydration depends on the reductive formation of ketyl radicals on the substrate generated by injection of a single electron from the ATP-dependent activator protein HadI. The enzyme is specific for the R-isomer.
Similarity
Belongs to the FldB/FldC dehydratase alpha/beta subunit family.
Sequence
MSEKKEARVVINDLLAEQYANAFKAKEEGRPVGWSTSVFPQELAEVFDLNVLYPENQAAGVAAKKGSLELCEIAESKGYSIDLCAYARTNFGLLENGGCEALDMPAPDFLLCCNNICNQVIKWYENISRELDIPLIMIDTTFNNEDEVTQSRIDYIKAQFEEAIKQLEIISGKKFDPKKFEEVMKISAENGRLWKYSMSLPADSSPSPMNGFDLFTYMAVIVCARGKKETTEAFKLLIEELEDNMKTGKSSFRGEEKYRIMMEGIPCWPYIGYKMKTLAKFGVNMTGSVYPHAWALQYEVNDLDGMAVAYSTMFNNVNLDRMTKYRVDSLVEGKCDGAFYHMNRSCKLMSLIQYEMQRRAAEETGLPYAGFDGDQADPRAFTNAQFETRIQGLVEVMEERKKLNRGEI