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Entry version 111 (29 Sep 2021)
Sequence version 1 (21 Dec 2004)
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Protein

Polyamine aminopropyltransferase

Gene

speE

Organism
Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8)
Status
Reviewed-Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the 'protein existence' evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Involved in the biosynthesis of polyamines which are thought to support the growth of thermophilic microorganisms under high-temperature conditions. It seems that long-chain and branched-chain of polyamines effectively stabilize DNA and RNA, respectively. Catalyzes the irreversible transfer of a propylamine group from the amino donor S-adenosylmethioninamine (decarboxy-AdoMet) to agmatine to yield N1-aminopropylagmatine. An efficient aminopropyltransferase activity has been also observed with norspermidine which produces thermine, and spermidine which produces spermine and thermospermine. The aminopropyl activity with homospermidine, mitsubishine, thermine, 1,3-diaminopropane, putrescine (1,4-diaminobutane), spermine and caldopentamine are very low. The reaction involves a nucleophilic attack on the C-3 methylene of the propylamine moiety adjacent to the positively charged sulfur of decarboxy-AdoMet.

2 Publications

Miscellaneous

In T.thermophilus, the biosynthetic pathways of spermidine operates via N1-aminopropylagmatine without the production of putrescine.1 Publication

<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

<p>This subsection of the 'Function' section describes biophysical and chemical properties, such as maximal absorption, kinetic parameters, pH dependence, redox potentials and temperature dependence.<p><a href='/help/biophysicochemical_properties' target='_top'>More...</a></p>Kineticsi

Kcat is 0.73 sec(-1) for aminopropyl transferase activity with S-adenosylmethioninamine as substrate (at pH 9 and 37 degrees Celsius). Kcat is 0.65 sec(-1) for aminopropyl transferase activity with spermidine as substrate (at pH 9 and 37 degrees Celsius). Kcat is 0.53 sec(-1) for aminopropyl transferase activity with norspermidine as substrate (at pH 9 and 37 degrees Celsius). Kcat is 0.37 sec(-1) for aminopropyl transferase activity with agmatine as substrate (at pH 9 and 37 degrees Celsius). Kcat is 0.29 sec(-1) for aminopropyl transferase activity with mitsubishine as substrate (at pH 9 and 37 degrees Celsius).1 Publication
  1. KM=0.57 µM for norspermidine (at pH 9 and 37 degrees Celsius)1 Publication
  2. KM=0.77 µM for agmatine (at pH 9 and 37 degrees Celsius)1 Publication
  3. KM=1.64 µM for S-adenosylmethioninamine (at pH 9 and 37 degrees Celsius)1 Publication
  4. KM=1.73 µM for spermidine (at pH 9 and 37 degrees Celsius)1 Publication
  5. KM=38.3 µM for mitsubishine (at pH 9 and 37 degrees Celsius)1 Publication

pH dependencei

Optimum pH is 8.5 at 60 degrees Celsius.1 Publication

Temperature dependencei

Optimum temperature is above 80 degrees Celsius.1 Publication

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section describes the interaction between a single amino acid and another chemical entity. Priority is given to the annotation of physiological ligands.<p><a href='/help/binding' target='_top'>More...</a></p>Binding sitei33S-methyl-5'-thioadenosineUniRule annotationCombined sources1 Publication1
Binding sitei64SpermidineUniRule annotation1
Binding sitei88SpermidineUniRule annotation1
Binding sitei108S-methyl-5'-thioadenosineUniRule annotationCombined sources1 Publication1
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section is used for enzymes and indicates the residues directly involved in catalysis.<p><a href='/help/act_site' target='_top'>More...</a></p>Active sitei158Proton acceptorUniRule annotation1
Binding sitei168S-methyl-5'-thioadenosine; via carbonyl oxygenUniRule annotation1

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionTransferase
Biological processPolyamine biosynthesis

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
MetaCyc:MONOMER-16736

BRENDA Comprehensive Enzyme Information System

More...
BRENDAi
2.5.1.104, 2305

SABIO-RK: Biochemical Reaction Kinetics Database

More...
SABIO-RKi
Q5SK28

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Polyamine aminopropyltransferase1 PublicationUniRule annotation
Alternative name(s):
Agmatine aminopropyltransferase1 Publication (EC:2.5.1.1041 Publication)
N1-aminopropylagmatine synthase1 Publication
Norspermidine aminopropyltransferase1 Publication (EC:2.5.1.1261 Publication)
Spermidine aminopropyltransferase1 Publication (EC:2.5.1.791 Publication)
Spermine synthase1 Publication (EC:2.5.1.221 Publication)
Thermine synthase1 Publication
Thermospermine synthase1 Publication
Triamine/agmatine aminopropyltransferase1 Publication
Short name:
TAAPT1 Publication
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: 'Name', 'Synonyms', 'Ordered locus names' and 'ORF names'.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:speEUniRule annotation
Ordered Locus Names:TTHA0824
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiThermus thermophilus (strain ATCC 27634 / DSM 579 / HB8)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the 'taxonomic identifier' or 'taxid'.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri300852 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiBacteriaDeinococcus-ThermusDeinococciThermalesThermaceaeThermus
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000000532 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes_manual">proteome</a> can consist of several components.<br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Keywords - Cellular componenti

Cytoplasm

<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

<p>This subsection of the 'Pathology and Biotech' section describes the in vivo effects caused by ablation of the gene (or one or more transcripts) coding for the protein described in the entry. This includes gene knockout and knockdown, provided experiments have been performed in the context of a whole organism or a specific tissue, and not at the single-cell level.<p><a href='/help/disruption_phenotype' target='_top'>More...</a></p>Disruption phenotypei

Cells lacking both speB and speE genes show defective growth at 70 degrees Celsius and significantly defective growth at 78 degrees Celsius. They accumulate agmatine and N1-aminopropylagmatine.1 Publication

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the mature protein following processing or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_10000120281 – 314Polyamine aminopropyltransferaseAdd BLAST314

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Homotetramer.

1 Publication

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
300852.55772206

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

Secondary structure

1314
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...
SMRi
Q5SK28

Database of comparative protein structure models

More...
ModBasei
Search...

Protein Data Bank in Europe - Knowledge Base

More...
PDBe-KBi
Search...

Miscellaneous databases

Relative evolutionary importance of amino acids within a protein sequence

More...
EvolutionaryTracei
Q5SK28

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family_and_domains_section">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini4 – 241PABSUniRule annotationAdd BLAST238

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni140 – 141S-methyl-5'-thioadenosine bindingUniRule annotationCombined sources1 Publication2
Regioni158 – 161Spermidine bindingUniRule annotation4

<p>This subsection of the 'Family and domains' section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Belongs to the spermidine/spermine synthase family.UniRule annotation

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
COG0421, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_048199_0_1_0

Identification of Orthologs from Complete Genome Data

More...
OMAi
LWPGQSF

Database for complete collections of gene phylogenies

More...
PhylomeDBi
Q5SK28

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
2.30.140.10, 1 hit

HAMAP database of protein families

More...
HAMAPi
MF_00198, Spermidine_synth, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR030374, PABS
IPR030373, PABS_CS
IPR029063, SAM-dependent_MTases
IPR001045, Spermi_synthase
IPR035246, Spermidine_synt_N
IPR037163, Spermidine_synt_N_sf

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF17284, Spermine_synt_N, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF53335, SSF53335, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS01330, PABS_1, 1 hit
PS51006, PABS_2, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

Q5SK28-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MDYGMYFFEH VTPYETLVRR MERVIASGKT PFQDYFLFES KGFGKVLILD
60 70 80 90 100
KDVQSTERDE YIYHETLVHP AMLTHPEPKR VLIVGGGEGA TLREVLKHPT
110 120 130 140 150
VEKAVMVDID GELVEVAKRH MPEWHQGAFD DPRAVLVIDD ARAYLERTEE
160 170 180 190 200
RYDVVIIDLT DPVGEDNPAR LLYTVEFYRL VKAHLNPGGV MGMQAGMILL
210 220 230 240 250
THHRVHPVVH RTVREAFRYV RSYKNHIPGF FLNFGFLLAS DAFDPAAFSE
260 270 280 290 300
GVIEARIRER NLALRHLTAP YLEAMFVLPK DLLEALEKET MVSTDQNPFY
310
VTPEGEARQA PYKG
Length:314
Mass (Da):36,006
Last modified:December 21, 2004 - v1
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:i4B6E438CFE60552A
GO

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

More...
GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
AP008226 Genomic DNA Translation: BAD70647.1

NCBI Reference Sequences

More...
RefSeqi
WP_011172918.1, NC_006461.1
YP_144090.1, NC_006461.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
BAD70647; BAD70647; BAD70647

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
3168303

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ttj:TTHA0824

Pathosystems Resource Integration Center (PATRIC)

More...
PATRICi
fig|300852.9.peg.818

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AP008226 Genomic DNA Translation: BAD70647.1
RefSeqiWP_011172918.1, NC_006461.1
YP_144090.1, NC_006461.1

3D structure databases

Select the link destinations:

Protein Data Bank Europe

More...
PDBei

Protein Data Bank RCSB

More...
RCSB PDBi

Protein Data Bank Japan

More...
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
1UIRX-ray2.00A/B1-314[»]
3ANXX-ray2.50A/B1-314[»]
SMRiQ5SK28
ModBaseiSearch...
PDBe-KBiSearch...

Protein-protein interaction databases

STRINGi300852.55772206

Genome annotation databases

EnsemblBacteriaiBAD70647; BAD70647; BAD70647
GeneIDi3168303
KEGGittj:TTHA0824
PATRICifig|300852.9.peg.818

Phylogenomic databases

eggNOGiCOG0421, Bacteria
HOGENOMiCLU_048199_0_1_0
OMAiLWPGQSF
PhylomeDBiQ5SK28

Enzyme and pathway databases

BioCyciMetaCyc:MONOMER-16736
BRENDAi2.5.1.104, 2305
SABIO-RKiQ5SK28

Miscellaneous databases

EvolutionaryTraceiQ5SK28

Family and domain databases

Gene3Di2.30.140.10, 1 hit
HAMAPiMF_00198, Spermidine_synth, 1 hit
InterProiView protein in InterPro
IPR030374, PABS
IPR030373, PABS_CS
IPR029063, SAM-dependent_MTases
IPR001045, Spermi_synthase
IPR035246, Spermidine_synt_N
IPR037163, Spermidine_synt_N_sf
PfamiView protein in Pfam
PF17284, Spermine_synt_N, 1 hit
SUPFAMiSSF53335, SSF53335, 1 hit
PROSITEiView protein in PROSITE
PS01330, PABS_1, 1 hit
PS51006, PABS_2, 1 hit

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the 'Entry information' section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiSPEE_THET8
<p>This subsection of the 'Entry information' section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called 'Primary (citable) accession number'.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: Q5SK28
Secondary accession number(s): P83816
<p>This subsection of the 'Entry information' section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification ('Last modified'). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: January 15, 2008
Last sequence update: December 21, 2004
Last modified: September 29, 2021
This is version 111 of the entry and version 1 of the sequence. See complete history.
<p>This subsection of the 'Entry information' section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

<p>This section contains any relevant information that doesn't fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

3D-structure, Reference proteome

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
  2. SIMILARITY comments
    Index of protein domains and families
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