v5.1.0.3
Glycine data from LIS
Type | Active_site |
Description | Two different types of thiolase [ , , ] are found both in eukaryotes and in prokaryotes: acetoacetyl-CoA thiolase () and 3-ketoacyl-CoA thiolase ( ). 3-ketoacyl-CoA thiolase (also called thiolase I) has a broad chain-length specificity for its substrates and is involved in degradative pathways such as fatty acid beta-oxidation. Acetoacetyl-CoA thiolase (also called thiolase II) is specific for the thiolysis of acetoacetyl-CoA and involved in biosynthetic pathways such as poly beta-hydroxybutyrate synthesis or steroid biogenesis. In eukaryotes, there are two forms of 3-ketoacyl-CoA thiolase: one located in the mitochondrion and the other in peroxisomes.Mammalian nonspecific lipid-transfer protein (nsL-TP) (also known as sterol carrier protein 2) is a protein which seems to exist in two different forms: a 14 Kd protein (SCP-2) and a larger 58 Kd protein (SCP-x). The former is found in the cytoplasm or the mitochondria and is involved in lipid transport; the latter is found in peroxisomes. The C-terminal part of SCP-x is identical to SCP-2 while the N-terminal portion is evolutionary related to thiolases [ ].There are two conserved cysteine residues important for thiolase activity. The signature pattern for this entry contains the first conserved cysteine located in the N-terminal section of the enzymes, which is involved in the formation of an acyl-enzyme intermediate; the second located at the C-terminal extremity is the active site base involved in deprotonation in the condensation reaction [ ]. |
Short Name | Thiolase_acyl_enz_int_AS |