EC Number |
Protein Variants |
Reference |
---|
2.3.1.31 | C142A |
enzyme inactive |
687796 |
2.3.1.31 | C142A |
inactive enzyme |
687796 |
2.3.1.31 | C142S |
enzyme inactive |
687796 |
2.3.1.31 | C142S |
inactive enzyme |
687796 |
2.3.1.31 | D209N |
kcat/Km for acetyl-CoA is 1.45fold lower than wild-type value, kcat/Km for L-homocysteine is 1.6fold higher than wild-type value |
671984 |
2.3.1.31 | D315A |
site-directed mutagenesis, the mutant shows an almost complete loss of activity |
755982 |
2.3.1.31 | D374N |
kcat/Km for acetyl-CoA is 1.6fold than wild-type value, kcat/Km for L-homocysteine is 1.6fold higher than wild-type value |
671984 |
2.3.1.31 | D403N |
inactive mutant enzyme |
671984 |
2.3.1.31 | E111G |
mutant protein shows no detectable activity with acetyl-CoA but catalyzes an acyltransferase reaction using succinyl-CoA and homoserine (kcat (succinyl-CoA): 0.8/sec, Km (succinyl-CoA): 0.273 mM, Km (L-homoserine): 0.2 mM) |
687796 |
2.3.1.31 | E111G |
no activity with acetyl-CoA, but with succinyl-CoA and homoserine, glutamic acid 111 (corresponding to Escherichia coli residue with function in succinyl-specificity of homoserine transsuccinylase) sterically occludes fitting of a succinyl-enzyme intermediate in the active site |
687796 |