>cd03131 GATase1_HTS Type 1 glutamine amidotransferase (GATase1)-like domain found in homoserine trans-succinylase (HTS). Type 1 glutamine amidotransferase (GATase1)-like domain found in homoserine trans-succinylase (HTS). HTS, the first enzyme in methionine biosynthesis in Escherichia coli, transfers a succinyl group from succinyl-CoA to homoserine forming succinyl homoserine. It has been suggested that the succinyl group of succinyl-CoA is initially transferred to an enzyme nucleophile before subsequent transfer to homoserine. The catalytic triad typical of GATase1 domains is not conserved in this GATase1-like domain. However, in common with GATase1 domains a reactive cys residue is found in the sharp turn between a beta strand and an alpha helix termed the nucleophile elbow. It has been proposed that this cys is in the active site of the molecule. However, as succinyl has been found bound to a conserved lysine residue, this conserved cys may play a role in dimer formation. HTS acti

Probab=92.47  E-value=0.35  Score=29.13  Aligned_cols=47  Identities=19%  Similarity=0.268  Sum_probs=38.6

Q ss_pred             HCCCCEEEECCC------CCC-CCCHHHHHHHHHHHCCCCCHHHHHHHHHHHHH
Q ss_conf             216983997377------786-55016888998874047632235576999999
Q gi|254780195|r  344 FYGVHGILVPGG------FGK-RGSEGKIAAIKFARENKIPFLGICFGMQMAVI  390 (544)
Q Consensus       344 L~~~dGIlVPGG------FG~-RGieGkI~Ai~yARen~iP~LGIClGmQ~avI  390 (544)
T Consensus        60 ~~~~DglIITGAPve~l~fe~v~YW~El~~i~dwa~~~v~stl~iCWaA~Aal~  113 (175)
T cd03131          60 DAKFDGLIVTGAPVEHLPFEQVDYWEELTEILDWAKTHVTSTLFSCWAAMAALY  113 (175)
T ss_pred             HCCCCEEEEECCCCCCCCCCCCCCHHHHHHHHHHHHHHCCCEEEEHHHHHHHHH
T ss_conf             177766897189988788343877999999999998736633456499999999