>cd03311 CIMS_C_terminal_like CIMS - Cobalamine-independent methonine synthase, or MetE, C-terminal domain_like. Many members have been characterized as 5-methyltetrahydropteroyltriglutamate-homocysteine methyltransferases, EC:2.1.1.14, mostly from bacteria and plants. This enzyme catalyses the last step in the production of methionine by transferring a methyl group from 5-methyltetrahydrofolate to L-homocysteine without using an intermediate methyl carrier. The active enzyme has a dual (beta-alpha)8-barrel structure, and this model covers the C-terminal barrel, and a few single-barrel sequences most similar to the C-terminal barrel. It is assumed that the homologous N-terminal barrel has evolved from the C-terminus via gene duplication and has subsequently lost binding sites, and it seems as if the two barrels forming the active enzyme may sometimes reside on different polypeptides. The C-terminal domain incorporates the Zinc ion, which binds and activates homocysteine. Sidechains from

Probab=98.55 E-value=2.2e-06 Score=65.76 Aligned_cols=190 Identities=16% Similarity=0.056 Sum_probs=130.5 Q ss_pred CHHHHHHHHHHHHHHHHHCCCCCCCHHHHHHHHCCCHHHHHHHHHHHHHHHHHHHHHHHHCCCCEEEECCCCHHHCCHHH Q ss_conf 20111147999999996124677652467753013722289999999999999977777549816784383110068356 Q gi|254780812|r 138 ITLIGFCGAPWTVASYMISGGFIKDHGQNRVFAYQNSRAFNWLLDFLSDVSAEYLIAQIHAGVDVIQIFDTHAGCLGEHE 217 (346) Q Consensus 138 ~pLIGF~GgP~TlasYmieG~~sk~~~~~~~~~~~~p~~~~~ll~~lt~~~~~yl~~Qi~aGad~iqIFDs~ag~Ls~~~ 217 (346) T Consensus 119 ~~vK~~l~gp~ti~~~s~------~~~~---~~Y~~---~ee~~~dlA~~~~~Ei~~L~~aG~~~IQiDeP~l~~~~~~~ 186 (332) T cd03311 119 KPLKGILTGPVTIPSPSF------VRFR---GYYPS---REELAMDLALALREEIRDLYDAGCRYIQIDEPALAEGLPLE 186 (332) T ss_pred CHHCCCCCCCEECCCCCH------HHHC---CCCCC---HHHHHHHHHHHHHHHHHHHHHCCCCEEEECCCHHHHCCCCC T ss_conf 012024788722146313------4421---46999---99999999999999999999879988995283575267844 Q ss_pred HHHHHCCCHHHHHHHHHHHCCCCEE-ECCCCCCC-----------CCHHHHHCCCCCCEEECCCCC----CHHHHHHHC- Q ss_conf 7776127226899998630886236-02431100-----------001342014787223046779----989999707- Q gi|254780812|r 218 FENYAARSVGRIISAVRRKYPNAKF-ISFAKGAG-----------YMLKNYRRLTDSNAIGLDWSV----PLSFALELQ- 280 (346) Q Consensus 218 f~~f~~p~~kkI~~~ik~~~~~vpi-I~f~~g~~-----------~~l~~~~~~~g~d~isiD~~~----dl~~a~~~~- 280 (346) T Consensus 187 ~~~~~~~~~~~~~~~~~~~~~~~~v~~HvC~Gn~~~~~~~~~~y~~i~~~l~~-~~vd~~~lE~~~~r~~~~~~l~~~~~ 265 (332) T cd03311 187 PDDLAADYLKWANEALADRPDDTQIHTHICYGNFRSTWAAEGGYEPIAEYIFE-LDVDVFFLEYDNSRAGGLEPLKELPY 265 (332) T ss_pred CHHHHHHHHHHHHHHHHCCCCCCEEEEEEECCCCCCCCCCCCCHHHHHHHHHH-CCCCEEEEEECCCCCCCHHHHHHCCC T ss_conf 26899999999999985389886899987678877765455627899999971-89988999836887410189984899 Q ss_pred CCEEEECCCCHHH-HCCCHHHHHHHHHHHHHHHCCCCCEEEECCCCCCCC---CHHHHHHHHHH Q ss_conf 9846968888467-709988999999999997325992896089763366---88999999999 Q gi|254780812|r 281 KEGPVQGNLDPMR-LVVGNQVMIDGVNAILDVLGSGPFIFNLGHGITPQV---DPKNVLDLVKT 340 (346) Q Consensus 281 ~~~~lqGNldP~~-L~~~~e~i~~~~~~~l~~~~~~~~I~nLGhGi~p~t---p~eNv~~~v~~ 340 (346) T Consensus 266 ~k~v~lGvid~~~~~vE~~eev~~rI~~a~~~v~~e~l~~~pdCGf~~~~~~~a~~kl~~~~~~ 329 (332) T cd03311 266 DKKVGLGVVDVKSPEVESPEEVKDRIEEAAKYVPLEQLWVSPDCGFATRERGNALTKLENMVKA 329 (332) T ss_pred CCEEEEEEEECCCCCCCCHHHHHHHHHHHHHHCCHHHEEECCCCCCCCCCCCHHHHHHHHHHHH T ss_conf 9879866882799998999999999999997389988898688898828721789999999985

HHsearch alignment for GI: 254780812 and conserved domain: cd03311