HHsearch alignment for GI: 254781031 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=97.92  E-value=5.7e-05  Score=49.87  Aligned_cols=110  Identities=15%  Similarity=0.103  Sum_probs=61.4

Q ss_pred             CEEEEEECCHHHHHHHHHHHHC-CCEEEEEEEECCCCCCCCHHHHHHHHHHHHHHHHHHHHCCCCCEEEECHHHCCCCCC
Q ss_conf             4899980965699999999974-983999997677887772799999999999998887520356158750110322444
Q gi|254781031|r   10 SALLLFSGGQDSSTCLSWALDR-FDRVETLSFDYGQRNKVELECRLCVRKKIVELMPKWKDSLGEDHILPLAILGDISHS   88 (240)
Q Consensus        10 ~av~l~SGGlDS~~~l~~l~~~-~~~v~~i~~~ygq~~~~~~~~a~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~   88 (240)
T Consensus        61 DCiv~vSGGkDS~y~~~~l~~~~gl~pL~vt~d~~~~t~~g-----------~~Ni~~l~~~lgvD~i~~~~n~~~~k~l  129 (343)
T TIGR03573        61 DCIIGVSGGKDSTYQAHVLKKKLGLNPLLVTVDPGWNTELG-----------VKNLNNLIKKLGFDLHTITINPETFRKL  129 (343)
T ss_pred             CEEEECCCCHHHHHHHHHHHHHHCCCEEEEEECCCCCCHHH-----------HHHHHHHHHHCCCCEEEECCCHHHHHHH
T ss_conf             68986887728999999999982992599983598779899-----------9999999983699858746999999999


Q ss_pred             CCCCCHHHHHCCCCCCHHHHHHHHHHHHHHHHHHHHHCCCCEEECCCCCC
Q ss_conf             33222011000123310111111122333777777433993651145444
Q gi|254781031|r   89 SLTKNVAMKIQDNNLPNTFVPGRNIIFLVFAATLAYRLGITNIVIGVCET  138 (240)
Q Consensus        89 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~a~~~g~~~i~~~~~~~  138 (240)
T Consensus       130 ~--k~---~~~~--~gd~~~~~-~~~i~~~~~~iA~k~~IplIi~Gen~~  171 (343)
T TIGR03573       130 Q--RA---YFKK--VGDPEWPQ-DHAIFASVYQVALKFNIPLIIWGENIA  171 (343)
T ss_pred             H--HH---HHHH--CCCHHHHH-HHHHHHHHHHHHHHCCCCEEEECCCCC
T ss_conf             9--99---9986--68946999-999999999999981999899756701