SPEE_HELPG
ID SPEE_HELPG Reviewed; 262 AA.
AC B5Z7J7;
DT 24-MAR-2009, integrated into UniProtKB/Swiss-Prot.
DT 25-NOV-2008, sequence version 1.
DT 03-AUG-2022, entry version 73.
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=HPG27_791;
OS Helicobacter pylori (strain G27).
OC Bacteria; Proteobacteria; Epsilonproteobacteria; Campylobacterales;
OC Helicobacteraceae; Helicobacter.
OX NCBI_TaxID=563041;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=G27;
RX PubMed=18952803; DOI=10.1128/jb.01416-08;
RA Baltrus D.A., Amieva M.R., Covacci A., Lowe T.M., Merrell D.S.,
RA Ottemann K.M., Stein M., Salama N.R., Guillemin K.;
RT "The complete genome sequence of Helicobacter pylori strain G27.";
RL J. Bacteriol. 191:447-448(2009).
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; CP001173; ACI27546.1; -; Genomic_DNA.
DR RefSeq; WP_000265100.1; NC_011333.1.
DR AlphaFoldDB; B5Z7J7; -.
DR SMR; B5Z7J7; -.
DR EnsemblBacteria; ACI27546; ACI27546; HPG27_791.
DR KEGG; hpg:HPG27_791; -.
DR HOGENOM; CLU_048199_0_0_7; -.
DR OMA; EYTIEAK; -.
DR OrthoDB; 1613081at2; -.
DR UniPathway; UPA00248; UER00314.
DR Proteomes; UP000001735; Chromosome.
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; 2.30.140.10; -; 1.
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 InterPro; IPR035246; Spermidine_synt_N.
DR InterPro; IPR037163; Spermidine_synt_N_sf.
DR PANTHER; PTHR11558; PTHR11558; 1.
DR Pfam; PF17284; Spermine_synt_N; 1.
DR SUPFAM; SSF53335; SSF53335; 1.
DR PROSITE; PS51006; PABS_2; 1.
PE 3: Inferred from homology;
KW Cytoplasm; Polyamine biosynthesis; Spermidine biosynthesis; Transferase.
FT CHAIN 1..262
FT /note="Polyamine aminopropyltransferase"
FT /id="PRO_1000099286"
FT DOMAIN 1..249
FT /note="PABS"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00198"
FT ACT_SITE 155
FT /note="Proton acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00198"
FT BINDING 29
FT /ligand="S-methyl-5'-thioadenosine"
FT /ligand_id="ChEBI:CHEBI:17509"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00198"
FT BINDING 83
FT /ligand="spermidine"
FT /ligand_id="ChEBI:CHEBI:57834"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00198"
SQ SEQUENCE 262 AA; 30519 MW; ABD057FE5C51C096 CRC64;
MWITQEITPY LRKEYTIEAK LLDVRSEHNI LEIFKSKDFG EIAMLNRQLL FKNFLHIESE
LLAHMGGCTK KELKEVLIVD GFDLELAHQL FKYDTHIDFV QADEKILDSF ISFFPHFHEV
KNNKNFTHAK QLLDLDIKKY DLILCLQEPD IHKIDGLKRM LKEDGVFISV AKHPLLEHVS
MQNALKNLGD FFAVAMPFVA PLRILSNKGY IYASFKTHPL KDLMAPKIEA LTSVRYYNED
IHRAAFALPK NLQEVFKDNI KS