ID   PYRK_METBF              Reviewed;         259 AA.
AC   Q46CG8;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   13-SEP-2005, sequence version 1.
DT   03-AUG-2022, entry version 103.
DE   RecName: Full=Probable dihydroorotate dehydrogenase B (NAD(+)), electron transfer subunit {ECO:0000255|HAMAP-Rule:MF_01211};
DE   AltName: Full=Dihydroorotate oxidase B, electron transfer subunit {ECO:0000255|HAMAP-Rule:MF_01211};
GN   Name=pyrK {ECO:0000255|HAMAP-Rule:MF_01211}; OrderedLocusNames=Mbar_A1467;
OS   Methanosarcina barkeri (strain Fusaro / DSM 804).
OC   Archaea; Euryarchaeota; Stenosarchaea group; Methanomicrobia;
OC   Methanosarcinales; Methanosarcinaceae; Methanosarcina.
OX   NCBI_TaxID=269797;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Fusaro / DSM 804;
RX   PubMed=16980466; DOI=10.1128/jb.00810-06;
RA   Maeder D.L., Anderson I., Brettin T.S., Bruce D.C., Gilna P., Han C.S.,
RA   Lapidus A., Metcalf W.W., Saunders E., Tapia R., Sowers K.R.;
RT   "The Methanosarcina barkeri genome: comparative analysis with
RT   Methanosarcina acetivorans and Methanosarcina mazei reveals extensive
RT   rearrangement within methanosarcinal genomes.";
RL   J. Bacteriol. 188:7922-7931(2006).
CC   -!- FUNCTION: Responsible for channeling the electrons from the oxidation
CC       of dihydroorotate from the FMN redox center in the PyrD type B subunit
CC       to the ultimate electron acceptor NAD(+). {ECO:0000255|HAMAP-
CC       Rule:MF_01211}.
CC   -!- COFACTOR:
CC       Name=[2Fe-2S] cluster; Xref=ChEBI:CHEBI:190135;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01211};
CC       Note=Binds 1 [2Fe-2S] cluster per subunit. {ECO:0000255|HAMAP-
CC       Rule:MF_01211};
CC   -!- COFACTOR:
CC       Name=FAD; Xref=ChEBI:CHEBI:57692;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01211};
CC       Note=Binds 1 FAD per subunit. {ECO:0000255|HAMAP-Rule:MF_01211};
CC   -!- PATHWAY: Pyrimidine metabolism; UMP biosynthesis via de novo pathway;
CC       orotate from (S)-dihydroorotate (NAD(+) route): step 1/1.
CC       {ECO:0000255|HAMAP-Rule:MF_01211}.
CC   -!- SUBUNIT: Heterotetramer of 2 PyrK and 2 PyrD type B subunits.
CC       {ECO:0000255|HAMAP-Rule:MF_01211}.
CC   -!- SIMILARITY: Belongs to the PyrK family. {ECO:0000255|HAMAP-
CC       Rule:MF_01211}.
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DR   EMBL; CP000099; AAZ70424.1; -; Genomic_DNA.
DR   RefSeq; WP_011306470.1; NC_007355.1.
DR   AlphaFoldDB; Q46CG8; -.
DR   SMR; Q46CG8; -.
DR   STRING; 269797.Mbar_A1467; -.
DR   EnsemblBacteria; AAZ70424; AAZ70424; Mbar_A1467.
DR   GeneID; 3627748; -.
DR   KEGG; mba:Mbar_A1467; -.
DR   eggNOG; arCOG02199; Archaea.
DR   HOGENOM; CLU_003827_1_1_2; -.
DR   OMA; RYMKCGI; -.
DR   OrthoDB; 67226at2157; -.
DR   UniPathway; UPA00070; UER00945.
DR   GO; GO:0051537; F:2 iron, 2 sulfur cluster binding; IEA:UniProtKB-KW.
DR   GO; GO:0009055; F:electron transfer activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0050660; F:flavin adenine dinucleotide binding; IEA:InterPro.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0044205; P:'de novo' UMP biosynthetic process; IEA:UniProtKB-UniPathway.
DR   Gene3D; 3.40.50.80; -; 1.
DR   HAMAP; MF_01211; DHODB_Fe_S_bind; 1.
DR   InterPro; IPR012165; Cyt_c3_hydrogenase_gsu.
DR   InterPro; IPR019480; Dihydroorotate_DH_Fe-S-bd.
DR   InterPro; IPR023455; Dihydroorotate_DHASE_ETsu.
DR   InterPro; IPR017927; FAD-bd_FR_type.
DR   InterPro; IPR039261; FNR_nucleotide-bd.
DR   InterPro; IPR001433; OxRdtase_FAD/NAD-bd.
DR   InterPro; IPR017938; Riboflavin_synthase-like_b-brl.
DR   Pfam; PF10418; DHODB_Fe-S_bind; 1.
DR   Pfam; PF00175; NAD_binding_1; 1.
DR   PIRSF; PIRSF006816; Cyc3_hyd_g; 1.
DR   SUPFAM; SSF52343; SSF52343; 1.
DR   SUPFAM; SSF63380; SSF63380; 1.
DR   PROSITE; PS00197; 2FE2S_FER_1; 1.
DR   PROSITE; PS51384; FAD_FR; 1.
PE   3: Inferred from homology;
KW   2Fe-2S; Electron transport; FAD; Flavoprotein; Iron; Iron-sulfur;
KW   Metal-binding; Pyrimidine biosynthesis; Transport.
FT   CHAIN           1..259
FT                   /note="Probable dihydroorotate dehydrogenase B (NAD(+)),
FT                   electron transfer subunit"
FT                   /id="PRO_1000066406"
FT   DOMAIN          1..89
FT                   /note="FAD-binding FR-type"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         211
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         216
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         219
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         229
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
SQ   SEQUENCE   259 AA;  28003 MW;  6569F55DA7463109 CRC64;
     MLPLNATIVQ INEESPLVRT FFFDFQFETM EPGQFVMVWV RGVDEVPMGL SSKNSITVQK
     VGEATSKLFE LKEGDSFGLR GPFGKGFSLP SEGEKTLIIA GGVGAAPLAP YAEAARSAGS
     EVHTVLGARS AGDLLFEKRF AEAGKVYIST DDGSKGTKGF VTDVLTDLDL SVYDRIAVCG
     PEIMISSVFR LLKDRQVLEK SEFSLQRYFK CGIGVCGACC IDKSGLRVCR DGPVFSGVQL
     LDSELGKYAR DASGRRVKI