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