ID   PORB_PYRHO              Reviewed;         331 AA.
AC   O58417;
DT   30-MAY-2000, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   03-AUG-2022, entry version 101.
DE   RecName: Full=Pyruvate synthase subunit PorB;
DE            EC=1.2.7.1;
DE   AltName: Full=Pyruvate oxidoreductase beta chain;
DE            Short=POR;
DE   AltName: Full=Pyruvic-ferredoxin oxidoreductase subunit beta;
GN   Name=porB; OrderedLocusNames=PH0685;
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   -!- CATALYTIC ACTIVITY:
CC       Reaction=CoA + 2 oxidized [2Fe-2S]-[ferredoxin] + pyruvate = acetyl-CoA
CC         + CO2 + H(+) + 2 reduced [2Fe-2S]-[ferredoxin]; Xref=Rhea:RHEA:12765,
CC         Rhea:RHEA-COMP:10000, Rhea:RHEA-COMP:10001, ChEBI:CHEBI:15361,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:16526, ChEBI:CHEBI:33737,
CC         ChEBI:CHEBI:33738, ChEBI:CHEBI:57287, ChEBI:CHEBI:57288; EC=1.2.7.1;
CC   -!- COFACTOR:
CC       Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC         Evidence={ECO:0000250|UniProtKB:P94692};
CC       Note=Binds 1 [4Fe-4S] cluster per subunit.
CC       {ECO:0000250|UniProtKB:P94692};
CC   -!- SUBUNIT: Heterotetramer of one alpha, one beta, one delta and one gamma
CC       chain. {ECO:0000250}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=BAA29776.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR   EMBL; BA000001; BAA29776.1; ALT_INIT; Genomic_DNA.
DR   PIR; F71114; F71114.
DR   RefSeq; WP_048053193.1; NC_000961.1.
DR   AlphaFoldDB; O58417; -.
DR   SMR; O58417; -.
DR   STRING; 70601.3257093; -.
DR   EnsemblBacteria; BAA29776; BAA29776; BAA29776.
DR   GeneID; 1443012; -.
DR   KEGG; pho:PH0685; -.
DR   eggNOG; arCOG01601; Archaea.
DR   OMA; ATGCMEV; -.
DR   OrthoDB; 29720at2157; -.
DR   Proteomes; UP000000752; Chromosome.
DR   GO; GO:0051539; F:4 iron, 4 sulfur cluster binding; IEA:UniProtKB-KW.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0019164; F:pyruvate synthase activity; IEA:UniProtKB-EC.
DR   GO; GO:0030976; F:thiamine pyrophosphate binding; IEA:InterPro.
DR   InterPro; IPR029061; THDP-binding.
DR   InterPro; IPR011766; TPP_enzyme-bd_C.
DR   Pfam; PF02775; TPP_enzyme_C; 1.
DR   SUPFAM; SSF52518; SSF52518; 1.
PE   3: Inferred from homology;
KW   4Fe-4S; Iron; Iron-sulfur; Metal-binding; Oxidoreductase.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000250"
FT   CHAIN           2..331
FT                   /note="Pyruvate synthase subunit PorB"
FT                   /id="PRO_0000099908"
FT   BINDING         21
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000250|UniProtKB:P94692"
FT   BINDING         24
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000250|UniProtKB:P94692"
FT   BINDING         59
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000250|UniProtKB:P94692"
FT   BINDING         222
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000250|UniProtKB:P94692"
SQ   SEQUENCE   331 AA;  36119 MW;  2E5FDCE5B6791C25 CRC64;
     MAVRKPPITT REYWAPGHAA CAGCGCAIAL KLATKAFSEA MEEKYGDPNA FAIAQATGCM
     EVVSAVFPYT AWKVPWIHVA FENAAAAASG VEAAWKKLGI KGKILAIGGD GGTADIGLQA
     LSGMLERGHN VVYLMYDNEA YMNTGIQRSS STPYGAWTTT SPPGKYSIGE DRPKKWVALI
     AAAHQIPYAA TASIGNPFDL VKKVKKAAKV DGPAFIQVHC TCPTGWRTPL EKGVEIARLA
     IETGMWPLFE IENGDIWNIK IQPPGGGAKV YKEGGRVVRI EFKKPIEEYL KYQGRFKHLF
     KRPEAIEELR NQIKAMWKVL GVEAILPRPE E