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PYRK_STRTD
ID   PYRK_STRTD              Reviewed;         257 AA.
AC   Q03KT7;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   14-NOV-2006, sequence version 1.
DT   03-AUG-2022, entry version 87.
DE   RecName: Full=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=STER_0968;
OS   Streptococcus thermophilus (strain ATCC BAA-491 / LMD-9).
OC   Bacteria; Firmicutes; Bacilli; Lactobacillales; Streptococcaceae;
OC   Streptococcus.
OX   NCBI_TaxID=322159;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-491 / LMD-9;
RX   PubMed=17030793; DOI=10.1073/pnas.0607117103;
RA   Makarova K.S., Slesarev A., Wolf Y.I., Sorokin A., Mirkin B., Koonin E.V.,
RA   Pavlov A., Pavlova N., Karamychev V., Polouchine N., Shakhova V.,
RA   Grigoriev I., Lou Y., Rohksar D., Lucas S., Huang K., Goodstein D.M.,
RA   Hawkins T., Plengvidhya V., Welker D., Hughes J., Goh Y., Benson A.,
RA   Baldwin K., Lee J.-H., Diaz-Muniz I., Dosti B., Smeianov V., Wechter W.,
RA   Barabote R., Lorca G., Altermann E., Barrangou R., Ganesan B., Xie Y.,
RA   Rawsthorne H., Tamir D., Parker C., Breidt F., Broadbent J.R., Hutkins R.,
RA   O'Sullivan D., Steele J., Unlu G., Saier M.H. Jr., Klaenhammer T.,
RA   Richardson P., Kozyavkin S., Weimer B.C., Mills D.A.;
RT   "Comparative genomics of the lactic acid bacteria.";
RL   Proc. Natl. Acad. Sci. U.S.A. 103:15611-15616(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; CP000419; ABJ66185.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q03KT7; -.
DR   SMR; Q03KT7; -.
DR   KEGG; ste:STER_0968; -.
DR   HOGENOM; CLU_003827_1_2_9; -.
DR   OMA; RYMKCGI; -.
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; 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; 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..257
FT                   /note="Dihydroorotate dehydrogenase B (NAD(+)), electron
FT                   transfer subunit"
FT                   /id="PRO_1000066408"
FT   DOMAIN          2..100
FT                   /note="FAD-binding FR-type"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         51..54
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         68..70
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         75..76
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         220
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
FT   BINDING         225
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"
FT   BINDING         244
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01211"
SQ   SEQUENCE   257 AA;  27817 MW;  2C8C3232D9818997 CRC64;
     MILIEDLTVV SQREIAPRIF EMVLKGEMVA DMQLGQFVHL KVPDPSKLLR RPISISEIDY
     NKKEATIVYR VEREGTAILS KMVAGQTIDT MGPQGNGFDI SIIEAGQKAL LVGGGIGVPP
     LVETAKQLKA KGVEVVSVIG FANKNAVILE DKLRACGDVY VTTDDGSYGI KGYVSTVIDN
     FDWTPDAVYS CGAPGMLKYV DSKFENHPHA YVSMEARMAC GMGACYACVV HVKGETDAKN
     LRVCEEGPVF PTGKVIV
 
 
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