HHsearch alignment for GI: 255764481 and conserved domain: cd03354

>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.
Probab=99.72  E-value=3.6e-18  Score=134.12  Aligned_cols=49  Identities=31%  Similarity=0.422  Sum_probs=47.2

Q ss_pred             CCCEECCCEEECCCCCCCCCEEEECCCEEECCCCCCCCCCCCCHHHHCC
Q ss_conf             5532148606523444336506404743501321122333310001074
Q gi|255764481|r  145 GHVIVDDRVVFGGGSAVHQFTRIGKYAFIGGMTGVVHDVIPYGILNGNP  193 (271)
Q Consensus       145 G~v~Igd~~~IG~~~~v~~~v~IG~~a~ig~gs~V~kdVpp~~~~~G~p  193 (271)
T Consensus        53 ~~~~Ig~~v~IG~~~~I~~gv~IG~~~vIgagsvV~~dv~~~si~~G~P  101 (101)
T cd03354          53 RHPTIGDNVVIGAGAKILGNITIGDNVKIGANAVVTKDVPANSTVVGVP  101 (101)
T ss_pred             CCCCCCCCEEECCCCEEECCCEECCCCEECCCCEECCCCCCCCEEEECC
T ss_conf             7761487586358988929879999879987988996859998998039