HHsearch alignment for GI: 254780151 and conserved domain: TIGR03573

>TIGR03573 WbuX N-acetyl sugar amidotransferase. This enzyme has been implicated in the formation of the acetamido moiety (sugar-NC(=NH)CH3) which is found on some exopolysaccharides and is positively charged at neutral pH. The reaction involves ligation of ammonia with a sugar N-acetyl group, displacing water. In E. coli (O145 strain) and Pseudomonas aeruginosa (O12 strain) this gene is known as wbuX and ifnA respectively and likely acts on sialic acid. In Campylobacter jejuni, the gene is known as pseA and acts on pseudaminic acid in the process of flagellin glycosylation. In other Pseudomonas strains and various organisms it is unclear what the identity of the sugar substrate is, and in fact, the phylogenetic tree of this family sports a considerably deep branching suggestive of possible major differences in substrate structure. Nevertheless, the family is characterized by a conserved tetracysteine motif (CxxC.....[GN]xCxxC) possibly indicative of a metal binding site, as well as an
Probab=98.99  E-value=2.6e-09  Score=87.16  Aligned_cols=110  Identities=15%  Similarity=0.204  Sum_probs=86.8

Q ss_pred             CEEEEEECCCHHHHHHHHHHHH-CCCEEEEEEEECCCCCCCCCCCCCCCCHHHHHHHHHHHHHCCCCEEECCHHHHHHHH
Q ss_conf             8899996098579999999988-698499999870478766555577881899999999999809958981707886632
Q gi|254780151|r   21 MRVVVAMSGGVDSSVVAALLKR-DGYDVIGVTLQLYNSRKASKRKGSCCAGQDVYDARRVCDTINVSHYVFDYEERFRNA   99 (408)
Q Consensus        21 ~kV~va~SGGVDSsvaa~lL~~-~G~~V~g~~m~~~~~~~~~~~~~~c~~~~d~~~a~~va~~LgI~~~~~d~~~~f~~~   99 (408)
T Consensus        60 YDCiv~vSGGkDS~y~~~~l~~~~gl~pL~vt~d~---~~--------~t~~g~~Ni~~l~~~lgvD~i~~~~n~~~~k~  128 (343)
T TIGR03573        60 YDCIIGVSGGKDSTYQAHVLKKKLGLNPLLVTVDP---GW--------NTELGVKNLNNLIKKLGFDLHTITINPETFRK  128 (343)
T ss_pred             CCEEEECCCCHHHHHHHHHHHHHHCCCEEEEEECC---CC--------CCHHHHHHHHHHHHHCCCCEEEECCCHHHHHH
T ss_conf             86898688772899999999998299259998359---87--------79899999999998369985874699999999


Q ss_pred             CCCCCHHHHHCCCCCCCEECCCCEEEHHHHHHHHCCCCCCEECCCCCC
Q ss_conf             244112678708861200001541105888887401687645225311
Q gi|254780151|r  100 VIVPFASSYAAGETPLPCVDCNRTVKFSDLLSVTRQLGADVLATGHYI  147 (408)
Q Consensus       100 V~~~~~~~y~~G~TPNPc~~CN~~iKF~~l~~~a~~~g~~~iATGHYa  147 (408)
T Consensus       129 l~k~~~~-----~~gd~~~~~~~~i-~~~~~~iA~k~~IplIi~Gen~  170 (343)
T TIGR03573       129 LQRAYFK-----KVGDPEWPQDHAI-FASVYQVALKFNIPLIIWGENI  170 (343)
T ss_pred             HHHHHHH-----HCCCHHHHHHHHH-HHHHHHHHHHCCCCEEEECCCC
T ss_conf             9999998-----6689469999999-9999999998199989975670