ID A0A1S2L0F2_9BACI Unreviewed; 275 AA.
AC A0A1S2L0F2;
DT 12-APR-2017, integrated into UniProtKB/TrEMBL.
DT 12-APR-2017, sequence version 1.
DT 18-JUN-2025, entry version 35.
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 ECO:0000313|EMBL:QOY37280.1};
GN ORFNames=AWH56_006520 {ECO:0000313|EMBL:QOY37280.1}, AWH56_21785
GN {ECO:0000313|EMBL:OIJ05928.1};
OS Anaerobacillus isosaccharinicus.
OC Bacteria; Bacillati; Bacillota; Bacilli; Bacillales; Bacillaceae;
OC Anaerobacillus.
OX NCBI_TaxID=1532552 {ECO:0000313|EMBL:OIJ05928.1, ECO:0000313|Proteomes:UP000180175};
RN [1] {ECO:0000313|EMBL:OIJ05928.1, ECO:0000313|Proteomes:UP000180175}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=NB2006 {ECO:0000313|EMBL:OIJ05928.1,
RC ECO:0000313|Proteomes:UP000180175};
RA Bassil N.M., Lloyd J.R.;
RT "Draft genome sequences of four alkaliphilic bacteria belonging to the
RT Anaerobacillus genus.";
RL Submitted (OCT-2016) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|EMBL:QOY37280.1, ECO:0000313|Proteomes:UP000180175}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=NB2006 {ECO:0000313|EMBL:QOY37280.1,
RC ECO:0000313|Proteomes:UP000180175};
RX PubMed=28104661;
RA Bassil N.M., Lloyd J.R.;
RT "Draft Genome Sequences of Four Alkaliphilic Bacteria Belonging to the
RT Anaerobacillus Genus.";
RL Genome Announc. 5:e01493-16(2017).
RN [3] {ECO:0000313|EMBL:QOY37280.1, ECO:0000313|Proteomes:UP000180175}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=NB2006 {ECO:0000313|EMBL:QOY37280.1,
RC ECO:0000313|Proteomes:UP000180175};
RX PubMed=29580368;
RA Bassil N.M., Lloyd J.R.;
RT "Anaerobacillus isosaccharinicus sp. nov., an alkaliphilic bacterium which
RT degrades isosaccharinic acid.";
RL Int. J. Syst. Evol. Microbiol. 69:3666-3671(2019).
RN [4] {ECO:0000313|EMBL:QOY37280.1}
RP NUCLEOTIDE SEQUENCE.
RC STRAIN=NB2006 {ECO:0000313|EMBL:QOY37280.1};
RA Bassil N.M., Lloyd J.R.;
RL Submitted (OCT-2020) to the EMBL/GenBank/DDBJ databases.
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=S-adenosyl 3-(methylsulfanyl)propylamine + putrescine = S-
CC methyl-5'-thioadenosine + spermidine + H(+); 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 ECO:0000256|RuleBase:RU003837};
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 ECO:0000256|RuleBase:RU003836}.
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DR EMBL; LQXD01000187; OIJ05928.1; -; Genomic_DNA.
DR EMBL; CP063356; QOY37280.1; -; Genomic_DNA.
DR RefSeq; WP_071319030.1; NZ_CP063356.1.
DR AlphaFoldDB; A0A1S2L0F2; -.
DR KEGG; aia:AWH56_006520; -.
DR OrthoDB; 9793120at2; -.
DR UniPathway; UPA00248; UER00314.
DR Proteomes; UP000180175; Chromosome.
DR Proteomes; UP000180175; Unassembled WGS sequence.
DR GO; GO:0005829; C:cytosol; IEA:TreeGrafter.
DR GO; GO:0004766; F:spermidine synthase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0008295; P:spermidine biosynthetic process; IEA:UniProtKB-UniRule.
DR FunFam; 3.40.50.150:FF:000056; Polyamine aminopropyltransferase; 1.
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; IPR030373; PABS_CS.
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 NCBIfam; NF037959; MFS_SpdSyn; 1.
DR NCBIfam; NF002010; PRK00811.1; 1.
DR NCBIfam; TIGR00417; speE; 1.
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; PS01330; PABS_1; 1.
DR PROSITE; PS51006; PABS_2; 1.
PE 3: Inferred from homology;
KW Cytoplasm {ECO:0000256|ARBA:ARBA00022490};
KW Polyamine biosynthesis {ECO:0000256|ARBA:ARBA00023115, ECO:0000256|HAMAP-
KW Rule:MF_00198}; Reference proteome {ECO:0000313|Proteomes:UP000180175};
KW Spermidine biosynthesis {ECO:0000256|ARBA:ARBA00023066, ECO:0000256|HAMAP-
KW Rule:MF_00198};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_00198}.
FT DOMAIN 2..235
FT /note="PABS"
FT /evidence="ECO:0000259|PROSITE:PS51006"
FT ACT_SITE 155
FT /note="Proton acceptor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00198,
FT ECO:0000256|PROSITE-ProRule:PRU00354"
FT BINDING 31
FT /ligand="S-methyl-5'-thioadenosine"
FT /ligand_id="ChEBI:CHEBI:17509"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00198"
FT BINDING 62
FT /ligand="spermidine"
FT /ligand_id="ChEBI:CHEBI:57834"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00198"
FT BINDING 86
FT /ligand="spermidine"
FT /ligand_id="ChEBI:CHEBI:57834"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00198"
FT BINDING 106
FT /ligand="S-methyl-5'-thioadenosine"
FT /ligand_id="ChEBI:CHEBI:17509"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00198"
FT BINDING 137..138
FT /ligand="S-methyl-5'-thioadenosine"
FT /ligand_id="ChEBI:CHEBI:17509"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00198"
FT BINDING 155..158
FT /ligand="spermidine"
FT /ligand_id="ChEBI:CHEBI:57834"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00198"
FT BINDING 162
FT /ligand="S-methyl-5'-thioadenosine"
FT /ligand_id="ChEBI:CHEBI:17509"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00198"
SQ SEQUENCE 275 AA; 31154 MW; 9007FAF996856371 CRC64;
MGIWFTEKQT EHFGITAEIK RTLHTEQTDF QKLDMVETAE FGNMLILDGM VMTTEKDEFV
YHEMVAHVPL FTHPNPKNVL VVGGGDGGVI REVLKHPSVE KATLVEIDGK VIEYSKKYLP
SIAGALDDPR VDVQVDDGFM HIAKSEAVYD VIMVDSTEPV GPAVNLFTKG FYEGIAKALK
EDGVFVAQTD NPWFHSHLIT NVQRDVKEVF PITRLYTANI PTYPSGLWTF TIGSKKYDPL
EVEEERFHEI DTKYYTKELH KAAFALPKFV QDLIK
//
