Transfers a succinyl group from succinyl-CoA to L-homoserine, forming succinyl-L-homoserine. L-homoserine + succinyl-CoA = CoA + O-succinyl-L-homoserine Requires MetW for activity. Amino-acid biosynthesis; L-methionine biosynthesis via de novo pathway; O-succinyl-L-homoserine from L-homoserine: step 1/1. Homodimer. Belongs to the AB hydrolase superfamily. MetX family.