ID   PYRK_METAR              Reviewed;         258 AA.
AC   Q0W8E0;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   05-SEP-2006, sequence version 1.
DT   03-AUG-2022, entry version 90.
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=UNCMA_28240;
GN   ORFNames=LRC391;
OS   Methanocella arvoryzae (strain DSM 22066 / NBRC 105507 / MRE50).
OC   Archaea; Euryarchaeota; Stenosarchaea group; Methanomicrobia;
OC   Methanocellales; Methanocellaceae; Methanocella.
OX   NCBI_TaxID=351160;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 22066 / NBRC 105507 / MRE50;
RX   PubMed=16857943; DOI=10.1126/science.1127062;
RA   Erkel C., Kube M., Reinhardt R., Liesack W.;
RT   "Genome of rice cluster I archaea -- the key methane producers in the rice
RT   rhizosphere.";
RL   Science 313:370-372(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; AM114193; CAJ35353.1; -; Genomic_DNA.
DR   RefSeq; WP_012037139.1; NC_009464.1.
DR   AlphaFoldDB; Q0W8E0; -.
DR   SMR; Q0W8E0; -.
DR   STRING; 351160.LRC391; -.
DR   PRIDE; Q0W8E0; -.
DR   EnsemblBacteria; CAJ35353; CAJ35353; LRC391.
DR   GeneID; 5144583; -.
DR   KEGG; rci:LRC391; -.
DR   PATRIC; fig|351160.9.peg.2894; -.
DR   eggNOG; arCOG02199; Archaea.
DR   OMA; RYMKCGI; -.
DR   OrthoDB; 67226at2157; -.
DR   UniPathway; UPA00070; UER00945.
DR   Proteomes; UP000000663; Chromosome.
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; 2.10.240.10; -; 1.
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; IPR037117; Dihydroorotate_DH_ele_sf.
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; IPR017938; Riboflavin_synthase-like_b-brl.
DR   Pfam; PF10418; DHODB_Fe-S_bind; 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; Reference proteome; Transport.
FT   CHAIN           1..258
FT                   /note="Probable dihydroorotate dehydrogenase B (NAD(+)),
FT                   electron transfer subunit"
FT                   /id="PRO_1000066409"
FT   DOMAIN          1..90
FT                   /note="FAD-binding FR-type"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         210
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         215
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         218
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         228
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
SQ   SEQUENCE   258 AA;  28246 MW;  7D99673183D10733 CRC64;
     MRPISATIKE IIDETPTIKT FRLDVDDWLH GKPGQYVMVW IRGVDEVPMT LSYDNAITVQ
     KVGEATEALF KLKAGDSVGI RGPYGNGWEI VGDDILLISG GVGSAPLAPL GEKARRIGVN
     VTTLAGYRTK EEVHFEDRYR AAGELVVATD DGTYGKKGYV TDLLKSVDLK KFTQIYCCGP
     EKMMYRVLCA LDEAGVAGLS QFSLQRYIKC GIGVCGSCCM DPDGLRVCRD GPVFDGETLL
     RSEMGKYARD ASGRRQQI