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PYRK_PYRHO
ID   PYRK_PYRHO              Reviewed;         247 AA.
AC   O57738;
DT   01-DEC-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-2000, sequence version 2.
DT   03-AUG-2022, entry version 133.
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=PH1965;
OS   Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC
OS   100139 / OT-3).
OC   Archaea; Euryarchaeota; Thermococci; Thermococcales; Thermococcaceae;
OC   Pyrococcus.
OX   NCBI_TaxID=70601;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3;
RX   PubMed=9679194; DOI=10.1093/dnares/5.2.55;
RA   Kawarabayasi Y., Sawada M., Horikawa H., Haikawa Y., Hino Y., Yamamoto S.,
RA   Sekine M., Baba S., Kosugi H., Hosoyama A., Nagai Y., Sakai M., Ogura K.,
RA   Otsuka R., Nakazawa H., Takamiya M., Ohfuku Y., Funahashi T., Tanaka T.,
RA   Kudoh Y., Yamazaki J., Kushida N., Oguchi A., Aoki K., Yoshizawa T.,
RA   Nakamura Y., Robb F.T., Horikoshi K., Masuchi Y., Shizuya H., Kikuchi H.;
RT   "Complete sequence and gene organization of the genome of a hyper-
RT   thermophilic archaebacterium, Pyrococcus horikoshii OT3.";
RL   DNA Res. 5:55-76(1998).
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}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=BAA31092.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR   EMBL; BA000001; BAA31092.1; ALT_INIT; Genomic_DNA.
DR   PIR; E71212; E71212.
DR   RefSeq; WP_010886030.1; NC_000961.1.
DR   AlphaFoldDB; O57738; -.
DR   SMR; O57738; -.
DR   STRING; 70601.3258409; -.
DR   EnsemblBacteria; BAA31092; BAA31092; BAA31092.
DR   GeneID; 1442812; -.
DR   KEGG; pho:PH1965; -.
DR   eggNOG; arCOG02199; Archaea.
DR   OMA; RYMKCGI; -.
DR   OrthoDB; 67226at2157; -.
DR   UniPathway; UPA00070; UER00945.
DR   Proteomes; UP000000752; 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; IPR000951; Ph_dOase_redase.
DR   InterPro; IPR017938; Riboflavin_synthase-like_b-brl.
DR   Pfam; PF10418; DHODB_Fe-S_bind; 1.
DR   PIRSF; PIRSF006816; Cyc3_hyd_g; 1.
DR   PRINTS; PR00409; PHDIOXRDTASE.
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..247
FT                   /note="Probable dihydroorotate dehydrogenase B (NAD(+)),
FT                   electron transfer subunit"
FT                   /id="PRO_0000148381"
FT   DOMAIN          1..87
FT                   /note="FAD-binding FR-type"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         200
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         205
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         208
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"
SQ   SEQUENCE   247 AA;  27659 MW;  917B83189CB5C0B2 CRC64;
     MLRRVTLKET WEVAKNIKAF RFDEKLDFTP GQFIMVWLPG VNEKPFSLAD KDLIVVKRVG
     PFTSKLFTLE EGDYLWIRGP YGNGFKEVKG KVALVAGGIG IPPIYALAKH GKLEEKVLIY
     GARGKDELAL LDIENYVDEI VITTDDGSYG IKGFPTDVLA KRKEEFSQVY ACGPEIMLAK
     VLEIMNYERT QISAERYMKC GIGICGSCAL GPYLVCRDGP VFTGEQLKDT EFGKFTRLPD
     GRIKGLR
 
 
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