>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=95.51 E-value=0.23 Score=29.08 Aligned_cols=144 Identities=17% Similarity=0.234 Sum_probs=76.2 Q ss_pred HHHHHHHHHHHCCCCEEEEEEECCEECCCCCC-------CHHHHHHHHH-CCCCEEEEEEEEEEC----------CHHHH Q ss_conf 99999999996599899997342634584341-------7899998641-256416856788512----------03367 Q gi|254780975|r 18 RLGEEISNITKAGAKQIHFDVMDGCFVPNISF-------GADVIRSLRS-YSDSVFDCHLMISSI----------DSHIN 79 (224) Q Consensus 18 ~l~~~i~~l~~~~~d~iHiDImDg~fvpn~~~-------~~~~i~~i~~-~t~~~~dvHLMv~~P----------~~~i~ 79 (224) T Consensus 156 ~~~~Ei~~L~~aG~~~IQiDeP~l~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~v~~HvC~Gn~~~~~~~~~~y~~i~~ 235 (332) T cd03311 156 ALREEIRDLYDAGCRYIQIDEPALAEGLPLEPDDLAADYLKWANEALADRPDDTQIHTHICYGNFRSTWAAEGGYEPIAE 235 (332) T ss_pred HHHHHHHHHHHCCCCEEEECCCHHHHCCCCCCHHHHHHHHHHHHHHHHCCCCCCEEEEEEECCCCCCCCCCCCCHHHHHH T ss_conf 99999999998799889952835752678442689999999999998538988689998767887776545562789999 Q ss_pred HHCCCCCCEEEEECCCCC-CHHHHHHHHHHCCCEEEEE-EECCCC----HHH----HHHHHHHCCEEEEEEEEC--CCCC Q ss_conf 640477607999706642-1589998677649825998-523334----478----998862014028998306--7765 Q gi|254780975|r 80 IIADAGCDIITFHPESSP-HIRRSLRTIHAMGKKTGVA-INPETP----VAI----LEDVIDEIDMILIMTVNP--GFGG 147 (224) Q Consensus 80 ~~~~~g~d~i~~H~E~~~-~~~~~i~~i~~~g~k~Gia-i~p~T~----~~~----i~~~l~~~D~vliM~V~P--G~~G 147 (224) T Consensus 236 ~l~~~~vd~~~lE~~~~r~~~~~~l~~~~~-~k~v~lGvid~~~~~vE~~eev~~rI~~a~~~v~~e-~l~~~pdCGf~~ 313 (332) T cd03311 236 YIFELDVDVFFLEYDNSRAGGLEPLKELPY-DKKVGLGVVDVKSPEVESPEEVKDRIEEAAKYVPLE-QLWVSPDCGFAT 313 (332) T ss_pred HHHHCCCCEEEEEECCCCCCCHHHHHHCCC-CCEEEEEEEECCCCCCCCHHHHHHHHHHHHHHCCHH-HEEECCCCCCCC T ss_conf 997189988999836887410189984899-987986688279999899999999999999738998-889868889882 Q ss_pred CCCCCHHHHHHHHHHHH Q ss_conf 33220135778998654 Q gi|254780975|r 148 QQLIESTIPKIRQAKAL 164 (224) Q Consensus 148 q~f~~~~l~kI~~l~~~ 164 (224) T Consensus 314 ~~-~~~a~~kl~~~~~~ 329 (332) T cd03311 314 RE-RGNALTKLENMVKA 329 (332) T ss_pred CC-CCHHHHHHHHHHHH T ss_conf 87-21789999999985

HHsearch alignment for GI: 254780975 and conserved domain: cd03311