>TIGR03283 thy_syn_methano thymidylate synthase, methanogen type. Thymidylate synthase makes dTMP for DNA synthesis, and is among the most widely distributed of all enzymes. Members of this protein family are encoded within a completed genome sequence if and only if that species is one of the methanogenenic archaea. In these species, tetrahydromethanopterin replaces tetrahydrofolate, The member from Methanobacterium thermoautotrophicum was shown to behave as a thymidylate synthase based on similar side reactions (the exchange of a characteristic proton with water), although the full reaction was not reconstituted. Partial sequence data showed no similarity to known thymidylate synthases simply because the region sequenced was from a distinctive N-terminal region not found in other thymidylate synthases. Members of this protein family appear, therefore, to a novel, tetrahydromethanopterin-dependent thymidylate synthase.

Probab=100.00 E-value=0 Score=389.31 Aligned_cols=190 Identities=22% Similarity=0.282 Sum_probs=171.6 Q ss_pred HHHHHHHHHHHHCCCEECCCCCCCEEEEEECEEEEECCCCCCEEEEEEHHHHHHHHHHHHHHCCCCCHHHHHHHCCCHHH Q ss_conf 57999999998639260379985347776120464423698104642022688999999985366646888640032135 Q gi|254780956|r 2 HQYLDLLRHVIKFGSDRRDRTGVGTRSTFGYQMRFDLSKGFPLLTTKKVHWKSVVHELLWFLRGDSNVSYLHRHGVSIWD 81 (264) Q Consensus 2 ~qYl~l~~~il~~G~~~~dRtG~~t~s~fg~~~~~dl~~gfPllTtkk~~~k~~i~EllW~l~G~tn~~~l~~~~~~iWd 81 (264) T Consensus 10 ~A~~~~l~~Il~~G~~~~d~~G~~tke~~~-----------~~i~i~~p~~~~i~~~~~~~~------~~~~~y~~~~l~ 72 (199) T TIGR03283 10 QAWRELVTKIMVEGEVVEDERGSLTKEVRN-----------LIIHIENPGPEKIPEGYPLDE------EKLEEYEKQLLD 72 (199) T ss_pred HHHHHHHHHHHHCCCEEECCCCCEEEEECC-----------EEEEECCCCCCCCCCCCCCCH------HHHHHHHHHHCC T ss_conf 999999999996095530588978778010-----------189984787775455677557------799999997067 Q ss_pred HHHHHHCCCCCCCCCHHHCCCCCCCCHHHHHHHHHHHHHCCCCHHHHHHHHCCHHHHHHCCCCCCCCCEEEEECCCEEEE Q ss_conf 65421001387662010003677532688999999999808852367775169888320242113540246676880599 Q gi|254780956|r 82 EWADKDGELGPIYGVQWRSWPDYDGNVIDQISSIVQSLRADPYSRRHIVSAWNVALIDKMALPPCHCLFQFYVDNGKLSC 161 (264) Q Consensus 82 ~~a~~~g~lg~~YG~qwR~~~~~~~~~~DQl~~vi~~Lk~np~sRR~i~~~wnp~~~~~~~lpPC~~~~qf~v~~g~L~~ 161 (264) T Consensus 73 ---~~~~g~~y~YG~r~r~~~-----g~DQi~~vi~~Lk~~p~SRR~i~~~wnp~~~~~~~~pPC~~~~qf~v~~~kL~~ 144 (199) T TIGR03283 73 ---PERQGFVYTYGNRLRRYF-----GIDQIDYIIERLNQSPNSRRAIAITWDPPQDIKVDEVPCLQLVQFLIRDNKLYL 144 (199) T ss_pred ---CCCCCCCCCCHHHHHCCC-----CCCHHHHHHHHHHCCCCCCEEEEEEECCHHHCCCCCCCCCEEEEEEECCCEEEE T ss_conf ---434980857268873379-----963999999997159996169998188315515788688259999990992899 Q ss_pred EEEECCCCHHHHCCHHHHHHHHHHHHHHHHHCCCCEEEEEECCCCEEEHHHHHHH Q ss_conf 9972624402220216799999999999762242111135227302100368999 Q gi|254780956|r 162 QLYQRSGDVFLGIPFNIASYSLLTMMLASVIGFQYGEFIHTLGDVHLYNNHFEQA 216 (264) Q Consensus 162 ~~~qRS~D~~lG~pfNi~~y~lL~~~iA~~~gl~~G~~~~~~~d~HIY~nH~~~v 216 (264) T Consensus 145 ~~~~RS~D~~lg~p~Ni~~~~~L~~~iA~~~gl~~G~~~~~~~~~HIYe~~~d~v 199 (199) T TIGR03283 145 TAFFRSNDVGGAWVANAIGLRRLQEYVAEKVGVEPGTLTTHAISAHIYERDFDEL 199 (199) T ss_pred EEEECCCHHHCCCCHHHHHHHHHHHHHHHHHCCEEEEEEEEEEEEEEECCHHHHC T ss_conf 9997410112544537999999999999983990059999976289800417219

HHsearch alignment for GI: 254780956 and conserved domain: TIGR03283