ID A0A268TUI1_9HELI Unreviewed; 264 AA.
AC A0A268TUI1;
DT 20-DEC-2017, integrated into UniProtKB/TrEMBL.
DT 20-DEC-2017, sequence version 1.
DT 27-MAR-2024, entry version 22.
DE RecName: Full=Polyamine aminopropyltransferase {ECO:0000256|HAMAP-Rule:MF_00198};
DE AltName: Full=Putrescine aminopropyltransferase {ECO:0000256|HAMAP-Rule:MF_00198};
DE Short=PAPT {ECO:0000256|HAMAP-Rule:MF_00198};
DE AltName: Full=Spermidine synthase {ECO:0000256|HAMAP-Rule:MF_00198};
DE Short=SPDS {ECO:0000256|HAMAP-Rule:MF_00198};
DE Short=SPDSY {ECO:0000256|HAMAP-Rule:MF_00198};
DE EC=2.5.1.16 {ECO:0000256|HAMAP-Rule:MF_00198};
GN Name=speE {ECO:0000256|HAMAP-Rule:MF_00198};
GN ORFNames=BKH46_00400 {ECO:0000313|EMBL:PAF48408.1};
OS Helicobacter sp. 12S02634-8.
OC Bacteria; Campylobacterota; Epsilonproteobacteria; Campylobacterales;
OC Helicobacteraceae; Helicobacter.
OX NCBI_TaxID=1476199 {ECO:0000313|EMBL:PAF48408.1, ECO:0000313|Proteomes:UP000216003};
RN [1] {ECO:0000313|EMBL:PAF48408.1, ECO:0000313|Proteomes:UP000216003}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=12S02634-8 {ECO:0000313|EMBL:PAF48408.1,
RC ECO:0000313|Proteomes:UP000216003};
RX PubMed=28827684; DOI=10.1038/s41598-017-09091-7;
RA Gilbert M.J., Duim B., Timmerman A.J., Zomer A.L., Wagenaar J.A.;
RT "Whole genome-based phylogeny of reptile-associated Helicobacter indicates
RT independent niche adaptation followed by diversification in a
RT poikilothermic host.";
RL Sci. Rep. 7:8387-8387(2017).
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:0000256|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:0000256|HAMAP-Rule:MF_00198};
CC -!- PATHWAY: Amine and polyamine biosynthesis; spermidine biosynthesis;
CC spermidine from putrescine: step 1/1. {ECO:0000256|HAMAP-
CC Rule:MF_00198}.
CC -!- SUBUNIT: Homodimer or homotetramer. {ECO:0000256|HAMAP-Rule:MF_00198}.
CC -!- SIMILARITY: Belongs to the spermidine/spermine synthase family.
CC {ECO:0000256|ARBA:ARBA00007867, ECO:0000256|HAMAP-Rule:MF_00198}.
CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_00198,
CC ECO:0000256|PROSITE-ProRule:PRU00354}.
CC -!- CAUTION: Lacks the conserved Asp active site. {ECO:0000256|HAMAP-
CC Rule:MF_00198}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:PAF48408.1}.
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DR EMBL; MLAP01000001; PAF48408.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A268TUI1; -.
DR OrthoDB; 9793120at2; -.
DR UniPathway; UPA00248; UER00314.
DR Proteomes; UP000216003; Unassembled WGS sequence.
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; Spermidine synthase, tetramerisation domain; 1.
DR Gene3D; 3.40.50.150; Vaccinia Virus protein VP39; 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:SF11; SPERMIDINE SYNTHASE; 1.
DR PANTHER; PTHR11558; SPERMIDINE/SPERMINE SYNTHASE; 1.
DR Pfam; PF17284; Spermine_synt_N; 1.
DR Pfam; PF01564; Spermine_synth; 1.
DR SUPFAM; SSF53335; S-adenosyl-L-methionine-dependent methyltransferases; 1.
DR PROSITE; PS51006; PABS_2; 1.
PE 3: Inferred from homology;
KW Polyamine biosynthesis {ECO:0000256|ARBA:ARBA00023115, ECO:0000256|HAMAP-
KW Rule:MF_00198}; Spermidine biosynthesis {ECO:0000256|HAMAP-Rule:MF_00198};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_00198}.
FT DOMAIN 1..117
FT /note="PABS"
FT /evidence="ECO:0000259|PROSITE:PS51006"
FT BINDING 84
FT /ligand="spermidine"
FT /ligand_id="ChEBI:CHEBI:57834"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00198"
SQ SEQUENCE 264 AA; 30432 MW; 132B1B26A65AC60E CRC64;
MWITRQISPN FRQEYTIDTK LLDVRSPEHV LEIFQSNDFD QIAMIDESFI MLKKYLYIES
ELYAHLSLCS HPDPKNMLIL GGFDLEIAAQ ALKHEGLCVD FVQNDDKVLD SLISFLPNFS
SVSTHCRFKR HHKALDLDVK KYDVIVCQHR PNKHEIDGIQ RMLSKEGILV FFTKHPLLEF
ESFEASIAET GAFFDIVMPF FAPLSILTDR GFVFASKRYH PTADMLLQKI DMLEGLKYYN
ADIHQSAFSL PQALANKLKG IVKN
//
