HHsearch alignment for GI: 254780942 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=99.73  E-value=1.2e-17  Score=118.78  Aligned_cols=48  Identities=29%  Similarity=0.571  Sum_probs=45.7

Q ss_pred             CCEECCCCEECCCCEEECCEEECCCCEECCCCEECCCCCCCCEEEECC
Q ss_conf             629878879886998937839889989977835766436986898135
Q gi|254780942|r  379 KTHINENAFIGSNSSLIAPITIGQGTYVASGSIITQDTPENSLVFARS  426 (442)
Q Consensus       379 ~~~ig~~~~iG~~~~i~~gv~ig~~~~i~ag~~v~~dv~~~~~v~~~~  426 (442)
T Consensus        54 ~~~Ig~~v~IG~~~~I~~gv~IG~~~vIgagsvV~~dv~~~si~~G~P  101 (101)
T cd03354          54 HPTIGDNVVIGAGAKILGNITIGDNVKIGANAVVTKDVPANSTVVGVP  101 (101)
T ss_pred             CCCCCCCEEECCCCEEECCCEECCCCEECCCCEECCCCCCCCEEEECC
T ss_conf             761487586358988929879999879987988996859998998039