4.2.1.150	3-hydroxybutyryl-CoA	-	Clostridium acetobutylicum	crotonyl-CoA + H2O	-	?	427302	
4.2.1.150	3-hydroxybutyryl-CoA	-	Clostridium acetobutylicum	crotonyl-CoA + H2O	-	r	427302	
4.2.1.150	3-hydroxybutyryl-CoA	-	Clostridium acetobutylicum ATCC 824 / DSM 792 / JCM 1419 / LMG 5710 / VKM B-1787	crotonyl-CoA + H2O	-	r	427302	
4.2.1.150	a short-chain trans-2-enoyl-CoA + H2O	the enzyme is specific for short chain fatty acyl-CoA substrates and is sensitive to high concentrations of crotonyl-CoA. It requires a complete coenzyme A thioester substrate for efficient catalysis	Clostridium acetobutylicum	short-chain (3S)-3-hydroxyacyl-CoA	-	?	425860	
4.2.1.150	crotonyl-CoA + H2O	-	Clostridium acetobutylicum	?	-	?	404716	
4.2.1.150	crotonyl-CoA + H2O	-	Metallosphaera sedula	(S)-3-hydroxybutanoyl-CoA	-	?	427416	
4.2.1.150	crotonyl-CoA + H2O	the enzyme is involved in autotrophic carbon fixation	Metallosphaera sedula	(S)-3-hydroxybutanoyl-CoA	-	?	427416	
4.2.1.150	crotonyl-CoA + H2O	the enzyme is involved in the 3-hydroxypropionate/4-hydroxybutyrate carbon fixation pathway	Metallosphaera sedula	(S)-3-hydroxybutanoyl-CoA	-	?	427416	
4.2.1.150	crotonyl-CoA + H2O	bifunctional crotonyl-CoA hydratase/(S)-3-hydroxybutanoyl-CoA dehydrogenase (EC 4.2.1.150/EC 1.1.1.35)	Metallosphaera sedula	(S)-3-hydroxybutanoyl-CoA	-	?	427416	
4.2.1.150	crotonyl-CoA + H2O	-	Metallosphaera sedula DSM 5348	(S)-3-hydroxybutanoyl-CoA	-	?	427416