>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 = 39.7 bits (94), Expect = 0.001
 Identities = 36/137 (26%), Positives = 52/137 (37%), Gaps = 41/137 (29%)

Query: 146 GVEIGRKTYVGPGSVI--GAGVRIGRNCSIGAGSSIYSSLIGNSVILHSGVRIGNDGFGY 203
           G++I     +GPG  I  G G+ IG    IG           ++  ++ GV +G  G G 
Sbjct: 2   GIDIHPGAKIGPGLFIDHGTGIVIGETAVIG-----------DNCTIYQGVTLGGKGKGG 50

Query: 204 ARGVSDIHKIVHIGRVIIQDKVEIGANSAIDRGTIDDTIIGENTKIDNQVQIGHNVHIGC 263
            +               I D V IGA +          I+G        + IG NV IG 
Sbjct: 51  GKRH-----------PTIGDNVVIGAGA---------KILG-------NITIGDNVKIGA 83

Query: 264 GCIIVSQVGIAGSTYIG 280
             ++   V  A ST +G
Sbjct: 84  NAVVTKDVP-ANSTVVG 99