HHsearch alignment for GI: 254781223 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=99.04  E-value=2.1e-10  Score=59.86  Aligned_cols=83  Identities=8%  Similarity=0.091  Sum_probs=39.8

Q ss_pred             CCCCEEECCCEEEC--CCCEECCCCEECCCCCCCCCCCCCCCCCEEEEEEEECCCCCCCCCCCCCCCCCCCCCCCCCCCC
Q ss_conf             96876988970992--8839979815457543231122222221001135520221111222110112222211011111
Q gi|254781223|r    1 MYDNAVVRDCATVI--DDARVSGNASVSRFAQVKSNAEVSDNTYVRDNAKVGGYAKVSGNASVGGNAIVRDTAEVGGDAF   78 (110)
Q Consensus         1 i~~n~~I~~~a~I~--~~~~I~~n~~I~~~~~i~~~~~i~~~~~i~~~~~i~~~~~i~~~~~i~~~~~~~~~~~i~~~~~   78 (110)
T Consensus         5 I~~~~~IG~~~~I~~~~~v~Ig~~~~Ig~~~~I~~~~~ig~~~~~~~----~~~~~Ig~~v~IG~~~~I~~gv~IG~~~v   80 (101)
T cd03354           5 IHPGAKIGPGLFIDHGTGIVIGETAVIGDNCTIYQGVTLGGKGKGGG----KRHPTIGDNVVIGAGAKILGNITIGDNVK   80 (101)
T ss_pred             ECCCCEECCCEEECCCCCEEECCCCEECCCCEECCCCEECCCCCCCC----CCCCCCCCCEEECCCCEEECCCEECCCCE
T ss_conf             89999999492991998779999989999989988878866311468----77761487586358988929879999879


Q ss_pred             CCCCCCCCC
Q ss_conf             111243220
Q gi|254781223|r   79 VIGFTVISG   87 (110)
Q Consensus        79 i~~~~~I~~   87 (110)
T Consensus        81 IgagsvV~~   89 (101)
T cd03354          81 IGANAVVTK   89 (101)
T ss_pred             ECCCCEECC
T ss_conf             987988996