RPSBLAST alignment for GI: 254780942 and conserved domain: cd03354
>gnl|CDD|100045 cd03354, LbH_SAT, Serine acetyltransferase (SAT): SAT catalyzes the CoA-dependent acetylation of the side chain hydroxyl group of L-serine to form O-acetylserine, as the first step of a two-step biosynthetic pathway in bacteria and plants leading to the formation of L-cysteine. This reaction represents a key metabolic point of regulation for the cysteine biosynthetic pathway due to its feedback inhibition by cysteine. The enzyme is a 175 kDa homohexamer, composed of a dimer of homotrimers. Each subunit contains an N-terminal alpha helical region and a C-terminal left-handed beta-helix (LbH) subdomain with 5 turns, each containing a hexapeptide repeat motif characteristic of the acyltransferase superfamily of enzymes. The trimer interface mainly involves the C-terminal LbH subdomain while the dimer (of trimers) interface is mediated by the N-terminal alpha helical subdomain.. Length = 101
Score = 57.1 bits (139), Expect = 1e-08
Identities = 27/90 (30%), Positives = 44/90 (48%), Gaps = 4/90 (4%)
Query: 338 ATIKEGSKINHLSYV---GDSVVGKNVNIGAG-TITCNYDGTHKYKTHINENAFIGSNSS 393
A I G I+H + + +V+G N I G T+ G K I +N IG+ +
Sbjct: 9 AKIGPGLFIDHGTGIVIGETAVIGDNCTIYQGVTLGGKGKGGGKRHPTIGDNVVIGAGAK 68
Query: 394 LIAPITIGQGTYVASGSIITQDTPENSLVF 423
++ ITIG + + +++T+D P NS V
Sbjct: 69 ILGNITIGDNVKIGANAVVTKDVPANSTVV 98