>TIGR02485 CobZ_N-term precorrin 3B synthase CobZ; InterPro: IPR012831 Cobalamin (vitamin B12) is a structurally complex cofactor, consisting of a modified tetrapyrrole with a centrally chelated cobalt. Cobalamin is usually found in one of two biologically active forms: methylcobalamin and adocobalamin. Most prokaryotes, as well as animals, have cobalamin-dependent enzymes, whereas plants and fungi do not appear to use it. In bacteria and archaea, these include methionine synthase, ribonucleotide reductase, glutamate and methylmalonyl-CoA mutases, ethanolamine ammonia lyase, and diol dehydratase . In mammals, cobalamin is obtained through the diet, and is required for methionine synthase and methylmalonyl-CoA mutase . There are at least two distinct cobalamin biosynthetic pathways in bacteria : Aerobic pathway that requires oxygen and in which cobalt is inserted late in the pathway ; found in Pseudomonas denitrificans and Rhodobacter capsulatus. Anaerobic pathway in which cobalt insertion is the first committed step towards cobalamin synthesis ; found in Salmonella typhimurium, Bacillus megaterium, and Propionibacterium freudenreichii shermanii. Either pathway can be divided into two parts: (1) corrin ring synthesis (differs in aerobic and anaerobic pathways) and (2) adenosylation of corrin ring, attachment of aminopropanol arm, and assembly of the nucleotide loop (common to both pathways) . There are about 30 enzymes involved in either pathway, where those involved in the aerobic pathway are prefixed Cob and those of the anaerobic pathway Cbi. Several of these enzymes are pathway-specific: CbiD, CbiG, and CbiK are specific to the anaerobic route of S. typhimurium, whereas CobE, CobF, CobG, CobN, CobS, CobT, and CobW are unique to the aerobic pathway of P. denitrificans. This entry represents CobZ, which is essential for cobalamin biosynthesis and is complemented by precorrin 3B synthase CobG (1.3.99.1 from EC). The enzyme has been shown to contain flavin, haem and Fe-S cluster cofactors, and is believed to require dioxygen as a substrate. In Rhodobacter capsulatus, CobZ is found as a N-terminal domain, whereas in other species it exists as a separate protein. The C-terminal portion is homologous to the 2-component signal transduction system protein CitB (IPR012830 from INTERPRO)..

Probab=100.00 E-value=2.6e-33 Score=236.48 Aligned_cols=382 Identities=22% Similarity=0.255 Sum_probs=248.3 Q ss_pred ECEEEECCCHHHHHHHHHHHHCCCCEEEEECCCCCC--CCCHHCCCCEEEECCC-----CCCCC--HHHHHHHHHHHCCC Q ss_conf 058898996899999999998898299998689885--2104116534251378-----99999--99999989984588 Q gi|254781043|r 18 YDVVVVGAGGAGLRATLGMAEKGFKTACITKVFPTR--SHTVAAQGGIAASLAN-----MTPDS--WQWHLYDTIKGSDW 88 (611) Q Consensus 18 ~DVlVIG~G~AGl~AAi~A~e~G~~V~lieK~~~~~--g~s~~A~GGi~a~~~~-----~~~Ds--~~~~~~Dt~~~g~~ 88 (611) T Consensus 2 V~VLvIGgG~AgLCAAi~ArraGAsVllLeaAPr~~rGGNar--H-gRN~R~~hd~p~d~~~D~YpaEEf~~dL~~vtgg 78 (467) T TIGR02485 2 VDVLVIGGGLAGLCAAIEARRAGASVLLLEAAPRDLRGGNAR--H-GRNLRVAHDIPLDFLRDAYPAEEFRRDLLKVTGG 78 (467) T ss_pred CEEEEECCCHHHHHHHHHHHHCCCEEEEECCCCCCCCCCCCC--C-CCCCEEECCCCCCCCCCCCCHHHHHHHHHHHCCC T ss_conf 237887642588999999863796798402478532578653--3-3451110157888645787378999875431278 Q ss_pred CCCHHHHHHHHHHHHHHHHHHHHCCCCCCCCCCCCEEEECCCCCCCCCCCCCCCCEEEEECCCCCHHHHHHHHHHHHHCC Q ss_conf 77999999999988999999998699813279985510014641145678765640798666542667899999987312 Q gi|254781043|r 89 LGDVDAIQYLAMEAPQSVYELEHYGVPFSRNEAGKIYQRPFGGHMQNYGEGPPVQRTCAAADRTGHAILHTLYGQALKNN 168 (611) Q Consensus 89 l~d~~lv~~~~~~a~~~i~~Le~~Gv~f~r~~~G~~~~~~~gg~~~~~~~g~~~~R~~~~~d~tG~~i~~~L~~~~~~~g 168 (611) T Consensus 79 ~t~~~l~~L~i~r~s~~~~w~~~~GVhl~P~~aG~lpy---------------sRrtaF~~GG-GkAl~NAly~sAerLG 142 (467) T TIGR02485 79 RTDERLARLLIERASSILRWLIAHGVHLQPAAAGVLPY---------------SRRTAFLLGG-GKALVNALYASAERLG 142 (467) T ss_pred CCCHHHHHHHHHHCCHHHHHHHHCCCEECCCCCCCCCH---------------HHCCCCCCCC-HHHHHHHHHHHHHHCC T ss_conf 74115789988720023689996794336632565760---------------1111123576-1899999999885557 Q ss_pred CEEECCCEEEEEEECCCC-CCEEEEEEEECCCEEEEECCCCEEEECCCCCC--C-----CCCCC------------CCCE Q ss_conf 303113156520001344-30124689805870899506724741576565--4-----33421------------0640 Q gi|254781043|r 169 AEFFIEYFALDLIINSEG-CCVGVVAWQLETGEIHRFSAKLVVLATGGYGR--A-----YFSAT------------SAHT 228 (611) Q Consensus 169 v~i~~~~~~~~Li~d~dG-~V~Gav~~~~~~G~~~~i~AkaVILATGG~~~--l-----y~~~t------------~~~~ 228 (611) T Consensus 143 v~Iry~~~V~ri~~~~~g~~~i~~~~v---~~~~~rI~t~a~VlaaGG~ganr~WLr~~~G~~a~geWPadn~~~RGTpy 219 (467) T TIGR02485 143 VEIRYDAEVERIEREEDGRAFIAARLV---AAADERIATKAVVLAAGGLGANREWLRKAFGSRAEGEWPADNFLVRGTPY 219 (467) T ss_pred EEEECCCCCCCCCCCCCCCCCCCCEEE---ECCCCCEEEEEEEEEECCCCCCHHHHHHHCCCCCCCCCCHHCEEECCCCH T ss_conf 254147730002645678620121466---22688122468888617888897999983688757788511001258802 Q ss_pred ECCHHHHHHHH-HCCCCCCCCCCCCC--CCC----CCCCEEE--CCCCCCCCCEEEEECCCCCCCCCCCCCCCCCCCC-- Q ss_conf 14448878875-13653333222328--884----4220143--0456655780898326861255407651004752-- Q gi|254781043|r 229 CTGDGAGMVAR-AGLPLQDMEFVQFH--PTG----IYGAGCL--ITEGARGEGGYLVNSKGERFMERYAPSAKDLASR-- 297 (611) Q Consensus 229 ~tGdG~~mA~~-aGa~l~~mEf~qfh--Pt~----~~~~~~l--~~~~~rg~G~~l~n~~Gerf~~~y~~~~~el~~r-- 297 (611) T Consensus 220 ~~G~LL~~ll~d~Ga~aiGdP-t~~HvVavDaRaP~~DgGIvtRid~~---~lG~VV~r~G~Rf~de----Ga~~~P~ry 291 (467) T TIGR02485 220 AKGRLLKLLLDDEGADAIGDP-TDAHVVAVDARAPLYDGGIVTRIDSV---SLGVVVDRDGERFADE----GADSQPKRY 291 (467) T ss_pred HCCHHHHHHHHHCCCCCCCCC-CCCCEEEECCCCCCCCCCEEEEECEE---ECCEEECCCCCCHHHC----CCCCCCCEE T ss_conf 102689999854164303779-87306765688884578357441212---1131788977612413----667788413 Q ss_pred CEEHHHHHHH-----------HHHCCCCCCCCCEEEEE-------ECCCCHHHHHHHHHHHHH-------------HHHH Q ss_conf 0111568899-----------88178888888746886-------111798999998537999-------------9976 Q gi|254781043|r 298 DVVSRCMMME-----------IREGRGVGKSKDHIHLY-------LNHLDPAVLQERLPGISE-------------SARI 346 (611) Q Consensus 298 d~~s~ai~~e-----------i~~g~g~~~~~~~v~ld-------~~~~~~~~l~~~~~~~~~-------------~~~~ 346 (611) T Consensus 292 a~Wgr~~a~~Pgq~ay~lld~~a~~r~~P~a~pp~~Adtl~eLA~~lgidp~~l~~tld~~naaprvGqfdhttlddCht 371 (467) T TIGR02485 292 AVWGRRVADRPGQLAYLLLDAKALKRLAPSALPPVKADTLEELAAKLGIDPDALAETLDAYNAAPRVGQFDHTTLDDCHT 371 (467) T ss_pred ECHHHHHHCCCCCEEEEEECCHHHHHCCCCCCCCCCCCCHHHHHHHHCCCHHHHHHHHHCCCCCCCCCCCCCCCHHCCCC T ss_conf 00136763589851532432057863587456978888879999985888889998650678787666555531000013 Q ss_pred HCCCCCCCC----EE--------EEECCCCCCCCCCCCCCCCEEECCCCCCCCCCCCCEEECCCCCCCCCCCCCCCCCCC Q ss_conf 436786544----06--------752033100123421577158537788853322760340212203356643047643 Q gi|254781043|r 347 FAGVDVTRD----PI--------PVIPTVHYNMGGIPTNYWGEVLDANSKNPERFAPGLMAIGEAGCASVHGANRLGSNS 414 (611) Q Consensus 347 ~~g~D~~~~----~i--------~v~p~~hy~~GGi~vd~~g~v~~~~~~~~~t~i~GLyAaGe~a~~g~hGanrlggns 414 (611) T Consensus 372 -eGvvPak~~~ar~i~v~Pf~aypm~PG~tFt~yGl~vDatarVr~nd~~----~~~~LFaAG~~MagnvLg~GYlaG~G 446 (467) T TIGR02485 372 -EGVVPAKATAARTIAVVPFYAYPMKPGVTFTRYGLKVDATARVRLNDAR----ASDDLFAAGEIMAGNVLGKGYLAGAG 446 (467) T ss_pred -CCCCCCCCCCCCCCCCCCCCCCCCCCCCCEEECCEEECHHHHHHHHCCC----CCHHHHHHHHHHHHHHHHHHHHHHHH T ss_conf -5664442345656533773220356785146505021122444542588----97247889889999873102322115 Q ss_pred CCCCCCCCHHHHHHHHHHHH Q ss_conf 22222232156775566542 Q gi|254781043|r 415 LIDLVVFGRAAVIRASEMID 434 (611) Q Consensus 415 l~~~~vfG~~Ag~~aa~~~~ 434 (611) T Consensus 447 ~T~~AVFG~IAG~~AAR~~~ 466 (467) T TIGR02485 447 LTLAAVFGRIAGREAARLVR 466 (467) T ss_pred HHHHHHHHHHHHHHHHHCCC T ss_conf 67778863567889852058

HHsearch alignment for GI: 254781043 and conserved domain: TIGR02485