ID   PQQA_PSEST              Reviewed;          23 AA.
AC   Q9F9U1;
DT   16-JUN-2003, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-2001, sequence version 1.
DT   25-MAY-2022, entry version 39.
DE   RecName: Full=Coenzyme PQQ synthesis protein A;
DE   AltName: Full=Pyrroloquinoline quinone biosynthesis protein A;
GN   Name=pqqA;
OS   Pseudomonas stutzeri (Pseudomonas perfectomarina).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pseudomonadales;
OC   Pseudomonadaceae; Pseudomonas.
OX   NCBI_TaxID=316;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=BC-2;
RA   Chang C.-H., Herrick J.B., Okinaka R.T., Brainard J.B., Terwilliger T.C.;
RT   "Identification and characterization of genes activated by 2-chloroethanol
RT   in Pseudomonas stutzeri BC-2.";
RL   Submitted (AUG-1999) to the EMBL/GenBank/DDBJ databases.
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; AF176640; AAG09250.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q9F9U1; -.
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_0000220317"
FT   CROSSLNK        15..19
FT                   /note="Pyrroloquinoline quinone (Glu-Tyr)"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   23 AA;  2809 MW;  80815999B7EBCC47 CRC64;
     MWTKPSYTDL RIGFEVTLYF ANR