ID   SPEE_VIBVY              Reviewed;         300 AA.
AC   Q7MF74;
DT   15-MAR-2004, integrated into UniProtKB/Swiss-Prot.
DT   15-DEC-2003, sequence version 1.
DT   03-AUG-2022, entry version 103.
DE   RecName: Full=Polyamine aminopropyltransferase {ECO:0000255|HAMAP-Rule:MF_00198};
DE   AltName: Full=Putrescine aminopropyltransferase {ECO:0000255|HAMAP-Rule:MF_00198};
DE            Short=PAPT {ECO:0000255|HAMAP-Rule:MF_00198};
DE   AltName: Full=Spermidine synthase {ECO:0000255|HAMAP-Rule:MF_00198};
DE            Short=SPDS {ECO:0000255|HAMAP-Rule:MF_00198};
DE            Short=SPDSY {ECO:0000255|HAMAP-Rule:MF_00198};
DE            EC=2.5.1.16 {ECO:0000255|HAMAP-Rule:MF_00198};
GN   Name=speE {ECO:0000255|HAMAP-Rule:MF_00198}; OrderedLocusNames=VVA0446;
OS   Vibrio vulnificus (strain YJ016).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Vibrionales; Vibrionaceae;
OC   Vibrio.
OX   NCBI_TaxID=196600;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=YJ016;
RX   PubMed=14656965; DOI=10.1101/gr.1295503;
RA   Chen C.-Y., Wu K.-M., Chang Y.-C., Chang C.-H., Tsai H.-C., Liao T.-L.,
RA   Liu Y.-M., Chen H.-J., Shen A.B.-T., Li J.-C., Su T.-L., Shao C.-P.,
RA   Lee C.-T., Hor L.-I., Tsai S.-F.;
RT   "Comparative genome analysis of Vibrio vulnificus, a marine pathogen.";
RL   Genome Res. 13:2577-2587(2003).
CC   -!- FUNCTION: Catalyzes the irreversible transfer of a propylamine group
CC       from the amino donor S-adenosylmethioninamine (decarboxy-AdoMet) to
CC       putrescine (1,4-diaminobutane) to yield spermidine. {ECO:0000255|HAMAP-
CC       Rule:MF_00198}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=putrescine + S-adenosyl 3-(methylsulfanyl)propylamine = H(+) +
CC         S-methyl-5'-thioadenosine + spermidine; Xref=Rhea:RHEA:12721,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:17509, ChEBI:CHEBI:57443,
CC         ChEBI:CHEBI:57834, ChEBI:CHEBI:326268; EC=2.5.1.16;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00198};
CC   -!- PATHWAY: Amine and polyamine biosynthesis; spermidine biosynthesis;
CC       spermidine from putrescine: step 1/1. {ECO:0000255|HAMAP-
CC       Rule:MF_00198}.
CC   -!- SUBUNIT: Homodimer or homotetramer. {ECO:0000255|HAMAP-Rule:MF_00198}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00198}.
CC   -!- SIMILARITY: Belongs to the spermidine/spermine synthase family.
CC       {ECO:0000255|HAMAP-Rule:MF_00198}.
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DR   EMBL; BA000038; BAC96472.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q7MF74; -.
DR   SMR; Q7MF74; -.
DR   STRING; 672.VV93_v1c34290; -.
DR   EnsemblBacteria; BAC96472; BAC96472; BAC96472.
DR   KEGG; vvy:VVA0446; -.
DR   eggNOG; COG0421; Bacteria.
DR   HOGENOM; CLU_060070_2_0_6; -.
DR   OMA; YIPEHLM; -.
DR   UniPathway; UPA00248; UER00314.
DR   Proteomes; UP000002675; Chromosome II.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004766; F:spermidine synthase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0008295; P:spermidine biosynthetic process; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.40.50.150; -; 1.
DR   HAMAP; MF_00198; Spermidine_synth; 1.
DR   InterPro; IPR030374; PABS.
DR   InterPro; IPR029063; SAM-dependent_MTases_sf.
DR   InterPro; IPR001045; Spermi_synthase.
DR   SUPFAM; SSF53335; SSF53335; 1.
DR   PROSITE; PS51006; PABS_2; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Polyamine biosynthesis; Reference proteome;
KW   Spermidine biosynthesis; Transferase.
FT   CHAIN           1..300
FT                   /note="Polyamine aminopropyltransferase"
FT                   /id="PRO_0000156517"
FT   DOMAIN          7..253
FT                   /note="PABS"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00198"
FT   ACT_SITE        169
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00198"
FT   BINDING         37
FT                   /ligand="S-methyl-5'-thioadenosine"
FT                   /ligand_id="ChEBI:CHEBI:17509"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00198"
FT   BINDING         121
FT                   /ligand="S-methyl-5'-thioadenosine"
FT                   /ligand_id="ChEBI:CHEBI:17509"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00198"
FT   BINDING         148..149
FT                   /ligand="S-methyl-5'-thioadenosine"
FT                   /ligand_id="ChEBI:CHEBI:17509"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00198"
SQ   SEQUENCE   300 AA;  34193 MW;  F2D1807B54AD9804 CRC64;
     MMSINPIVLL FALLCTLLSP FSIGQSTIIH EQKSLYQDIV VFEHQDFRCL SFTAKKGERV
     QTCEYQDPQD KRIYFPYVRM TLAGLLFNPK PERILIIGLG GGSVPSALAE LYPESHMDIV
     EIDPVVSQIA ERYFYFQPSH NTRVHTGDAR VYIKRAGLKG QKYDFILLDA FNGEYIPEHL
     MTREFLMETK QLLSSSGVLV ANTFSTSKLY DHESATYRSV FGEFYNFKIP QESGNRVILS
     MLIPLPNQQA LQQQAEALTS ALQPFAIEIE NYPSLMTLEA DWDEQARLLT DQFSPANLLK