ID   PQQA_KLUIN              Reviewed;          23 AA.
AC   P59726;
DT   16-JUN-2003, integrated into UniProtKB/Swiss-Prot.
DT   16-JUN-2003, sequence version 1.
DT   25-MAY-2022, entry version 40.
DE   RecName: Full=Coenzyme PQQ synthesis protein A;
DE   AltName: Full=Pyrroloquinoline quinone biosynthesis protein A;
GN   Name=pqqA;
OS   Kluyvera intermedia (Enterobacter intermedius).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; Kluyvera.
OX   NCBI_TaxID=61648;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=14756528; DOI=10.1007/s00284-003-4068-7;
RA   Kim C.H., Han S.H., Kim K.Y., Cho B.H., Kim Y.H., Koo B.S., Kim Y.C.;
RT   "Cloning and expression of pyrroloquinoline quinone (PQQ) genes from a
RT   phosphate-solubilizing bacterium Enterobacter intermedium.";
RL   Curr. Microbiol. 47:457-461(2003).
CC   -!- FUNCTION: Required for coenzyme pyrroloquinoline quinone (PQQ)
CC       biosynthesis. PQQ is probably formed by cross-linking a specific
CC       glutamate to a specific tyrosine residue and excising these residues
CC       from the peptide (By similarity). {ECO:0000250}.
CC   -!- PATHWAY: Cofactor biosynthesis; pyrroloquinoline quinone biosynthesis.
CC   -!- SIMILARITY: Belongs to the PqqA family. {ECO:0000305}.
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DR   EMBL; AY216683; AAP34378.1; -; Genomic_DNA.
DR   AlphaFoldDB; P59726; -.
DR   UniPathway; UPA00539; -.
DR   GO; GO:0018189; P:pyrroloquinoline quinone biosynthetic process; IEA:UniProtKB-UniRule.
DR   HAMAP; MF_00656; PQQ_syn_PqqA; 1.
DR   InterPro; IPR011725; PQQ_synth_PqqA.
DR   Pfam; PF08042; PqqA; 1.
DR   TIGRFAMs; TIGR02107; PQQ_syn_pqqA; 1.
PE   3: Inferred from homology;
KW   PQQ biosynthesis.
FT   CHAIN           1..23
FT                   /note="Coenzyme PQQ synthesis protein A"
FT                   /id="PRO_0000220307"
FT   CROSSLNK        15..19
FT                   /note="Pyrroloquinoline quinone (Glu-Tyr)"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   23 AA;  2764 MW;  ACCB321460871C5D CRC64;
     MWKKPAFIDL RLGLEVTLYI SNR