ID   PQQC_BRADU              Reviewed;         259 AA.
AC   Q89FG3;
DT   16-JUN-2003, integrated into UniProtKB/Swiss-Prot.
DT   16-JUN-2003, sequence version 1.
DT   10-JUN-2026, entry version 113.
DE   RecName: Full=Pyrroloquinoline-quinone synthase {ECO:0000255|HAMAP-Rule:MF_00654};
DE            EC=1.3.3.11 {ECO:0000255|HAMAP-Rule:MF_00654};
DE   AltName: Full=Coenzyme PQQ synthesis protein C {ECO:0000255|HAMAP-Rule:MF_00654};
DE   AltName: Full=Pyrroloquinoline quinone biosynthesis protein C {ECO:0000255|HAMAP-Rule:MF_00654};
GN   Name=pqqC {ECO:0000255|HAMAP-Rule:MF_00654};
GN   OrderedLocusNames=blr6737;
OS   Bradyrhizobium diazoefficiens (strain JCM 10833 / BCRC 13528 / IAM 13628 /
OS   NBRC 14792 / USDA 110).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Alphaproteobacteria;
OC   Hyphomicrobiales; Nitrobacteraceae; Bradyrhizobium.
OX   NCBI_TaxID=224911;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=JCM 10833 / BCRC 13528 / IAM 13628 / NBRC 14792 / USDA 110;
RX   PubMed=12597275; DOI=10.1093/dnares/9.6.189;
RA   Kaneko T., Nakamura Y., Sato S., Minamisawa K., Uchiumi T., Sasamoto S.,
RA   Watanabe A., Idesawa K., Iriguchi M., Kawashima K., Kohara M.,
RA   Matsumoto M., Shimpo S., Tsuruoka H., Wada T., Yamada M., Tabata S.;
RT   "Complete genomic sequence of nitrogen-fixing symbiotic bacterium
RT   Bradyrhizobium japonicum USDA110.";
RL   DNA Res. 9:189-197(2002).
CC   -!- FUNCTION: Ring cyclization and eight-electron oxidation of 3a-(2-amino-
CC       2-carboxyethyl)-4,5-dioxo-4,5,6,7,8,9-hexahydroquinoline-7,9-
CC       dicarboxylic-acid to PQQ. {ECO:0000255|HAMAP-Rule:MF_00654}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=6-(2-amino-2-carboxyethyl)-7,8-dioxo-1,2,3,4,7,8-
CC         hexahydroquinoline-2,4-dicarboxylate + 3 O2 = pyrroloquinoline
CC         quinone + 2 H2O2 + 2 H2O + H(+); Xref=Rhea:RHEA:10692,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15378, ChEBI:CHEBI:15379,
CC         ChEBI:CHEBI:16240, ChEBI:CHEBI:58442, ChEBI:CHEBI:58778; EC=1.3.3.11;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00654};
CC   -!- PATHWAY: Cofactor biosynthesis; pyrroloquinoline quinone biosynthesis.
CC       {ECO:0000255|HAMAP-Rule:MF_00654}.
CC   -!- SIMILARITY: Belongs to the PqqC family. {ECO:0000255|HAMAP-
CC       Rule:MF_00654}.
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DR   EMBL; BA000040; BAC52002.1; -; Genomic_DNA.
DR   RefSeq; WP_011089476.1; NC_004463.1.
DR   AlphaFoldDB; Q89FG3; -.
DR   SMR; Q89FG3; -.
DR   STRING; 224911.AAV28_31280; -.
DR   PaxDb; 224911-AAV28_31280; -.
DR   EnsemblBacteria; BAC52002; BAC52002; BAC52002.
DR   GeneID; 46493711; -.
DR   KEGG; bja:blr6737; -.
DR   PATRIC; fig|224911.44.peg.6758; -.
DR   eggNOG; COG5424; Bacteria.
DR   HOGENOM; CLU_080136_0_0_5; -.
DR   InParanoid; Q89FG3; -.
DR   OrthoDB; 9800756at2; -.
DR   PhylomeDB; Q89FG3; -.
DR   UniPathway; UPA00539; -.
DR   Proteomes; UP000002526; Chromosome.
DR   GO; GO:0033732; F:pyrroloquinoline-quinone synthase activity; IEA:UniProtKB-EC.
DR   GO; GO:0018189; P:pyrroloquinoline quinone biosynthetic process; IEA:UniProtKB-UniRule.
DR   Gene3D; 1.20.910.10; Heme oxygenase-like; 1.
DR   HAMAP; MF_00654; PQQ_syn_PqqC; 1.
DR   InterPro; IPR016084; Haem_Oase-like_multi-hlx.
DR   InterPro; IPR011845; PqqC.
DR   InterPro; IPR039068; PqqC-like.
DR   InterPro; IPR004305; Thiaminase-2/PQQC.
DR   NCBIfam; TIGR02111; PQQ_syn_pqqC; 1.
DR   PANTHER; PTHR40279:SF3; 4-AMINOBENZOATE SYNTHASE; 1.
DR   PANTHER; PTHR40279; PQQC-LIKE PROTEIN; 1.
DR   Pfam; PF03070; TENA_THI-4; 1.
DR   SUPFAM; SSF48613; Heme oxygenase-like; 1.
PE   3: Inferred from homology;
KW   Oxidoreductase; PQQ biosynthesis; Reference proteome.
FT   CHAIN           1..259
FT                   /note="Pyrroloquinoline-quinone synthase"
FT                   /id="PRO_0000219977"
SQ   SEQUENCE   259 AA;  29290 MW;  4D394C1ED932C30E CRC64;
     MNAASLTGIT ALSIGKDIKL NSAEELEAAL RHIGATRYHS LHPFHKLLHG GKLNKGQVQA
     WALNRYYYQS TIPIKDAVVI SRFRDRATRL EWRHRIEDHD GDVGSEGGIE RWLKLTEGLG
     LDTAYVESTE GILPATRFAV EAYVHYCREK SPLEAIASSL TELFAPSIHE ERIAGMLQHY
     DFVNPDIMSY FKRRLTQAPR DANFALEYVR THARTPEERA SVCNALIFKT NVLWVQLDAL
     QHAYVEGHIP PGAFVPKEN
//