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Entry version 100 (12 Aug 2020)
Sequence version 2 (15 Aug 2003)
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Protein

DNA nucleotidylexotransferase

Gene

DNTT

Organism
Ambystoma mexicanum (Axolotl)
Status
Reviewed-Annotation score:

Annotation score:3 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 transcript 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

Template-independent DNA polymerase which catalyzes the random addition of deoxynucleoside 5'-triphosphate to the 3'-end of a DNA initiator. One of the in vivo functions of this enzyme is the addition of nucleotides at the junction (N region) of rearranged Ig heavy chain and T-cell receptor gene segments during the maturation of B- and T-cells.

By similarity

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">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 provides information relevant to cofactors. A cofactor is any non-protein substance required for a protein to be catalytically active. Some cofactors are inorganic, such as the metal atoms zinc, iron, and copper in various oxidation states. Others, such as most vitamins, are organic.<p><a href='/help/cofactor' target='_top'>More...</a></p>Cofactori

Mg2+By similarityNote: Can also utilize other divalent cations, such as Mn2+ and Co2+ (in vitro).By similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section indicates at which position the protein binds a given metal ion. The nature of the metal is indicated in the 'Description' field.<p><a href='/help/metal' target='_top'>More...</a></p>Metal bindingi339MagnesiumBy similarity1
Metal bindingi341MagnesiumBy similarity1
Metal bindingi434MagnesiumBy similarity1

<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 functionNucleotidyltransferase, Transferase
Biological processTerminal addition
LigandMagnesium, Metal-binding

<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%5Fand%5Ftaxonomy%5Fsection">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:
DNA nucleotidylexotransferase (EC:2.7.7.31)
Alternative name(s):
Terminal addition enzyme
Terminal deoxynucleotidyltransferase
Short name:
Terminal transferase
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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:DNTT
Synonyms:TDT
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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>OrganismiAmbystoma mexicanum (Axolotl)
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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 identifieri8296 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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 lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiAmphibiaBatrachiaCaudataSalamandroideaAmbystomatidaeAmbystoma

<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

Nucleus

<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_00002187941 – 510DNA nucleotidylexotransferaseAdd BLAST510

<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

3D structure databases

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

More...
SMRi
O57486

Database of comparative protein structure models

More...
ModBasei
Search...

<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%5Fand%5Fdomains%5Fsection">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>Domaini27 – 124BRCTPROSITE-ProRule annotationAdd BLAST98

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>Regioni254 – 258Involved in DNA bindingBy similarity5
Regioni329 – 334Deoxynucleoside triphosphate bindingBy similarity6
Regioni338 – 341Deoxynucleoside triphosphate bindingBy similarity4
Regioni449 – 450Deoxynucleoside triphosphate bindingBy similarity2

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a short (usually not more than 20 amino acids) conserved sequence motif of biological significance.<p><a href='/help/motif' target='_top'>More...</a></p>Motifi11 – 17Nuclear localization signalBy similarity7

<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 DNA polymerase type-X family.Curated

Family and domain databases

Conserved Domains Database

More...
CDDi
cd00141, NT_POLXc, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.10.150.110, 1 hit
3.30.210.10, 1 hit
3.30.460.10, 1 hit
3.40.50.10190, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR001357, BRCT_dom
IPR036420, BRCT_dom_sf
IPR002054, DNA-dir_DNA_pol_X
IPR019843, DNA_pol-X_BS
IPR010996, DNA_pol_b-like_N
IPR028207, DNA_pol_B_palm_palm
IPR018944, DNA_pol_lambd_fingers_domain
IPR027421, DNA_pol_lamdba_lyase_dom_sf
IPR037160, DNA_Pol_thumb_sf
IPR022312, DNA_pol_X
IPR043519, NT_sf
IPR029398, PolB_thumb
IPR027292, TdT
IPR001726, TdT/Mu

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00533, BRCT, 1 hit
PF14792, DNA_pol_B_palm, 1 hit
PF14791, DNA_pol_B_thumb, 1 hit
PF10391, DNA_pol_lambd_f, 1 hit
PF14716, HHH_8, 1 hit

PIRSF; a whole-protein classification database

More...
PIRSFi
PIRSF000817, DNA_NT, 1 hit
PIRSF501175, TDT, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00869, DNAPOLX
PR00871, DNAPOLXTDT

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00292, BRCT, 1 hit
SM00483, POLXc, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF47802, SSF47802, 1 hit
SSF52113, SSF52113, 1 hit
SSF81301, SSF81301, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS50172, BRCT, 1 hit
PS00522, DNA_POLYMERASE_X, 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%5Flength">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>Sequences (2)i

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">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.

This entry describes 2 <p>This subsection of the 'Sequence' section lists the alternative protein sequences (isoforms) that can be generated from the same gene by a single or by the combination of up to four biological events (alternative promoter usage, alternative splicing, alternative initiation and ribosomal frameshifting). Additionally, this section gives relevant information on each alternative protein isoform.<p><a href='/help/alternative_products' target='_top'>More...</a></p> isoformsi produced by alternative splicing. AlignAdd to basket
Isoform 1 (identifier: O57486-1) [UniParc]FASTAAdd to basket

This isoform has been chosen as the <div> <p><b>What is the canonical sequence?</b><p><a href='/help/canonical_and_isoforms' target='_top'>More...</a></p>canonicali sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.

« Hide
        10         20         30         40         50
MYAFPTTRIA PRRKQPKCIK PPKCTSKYDI KFKDIAIYIL ERKMGASRRY
60 70 80 90 100
FLMELARKKG FRVEPDLSEY VTHVVSEKNS GAEVLEWLQA KKAGSIPNVA
110 120 130 140 150
ILDISWFTDC MGAGQPVEIE RKHRLTLQKI CVCKSPSPVV PSRVGVSQYA
160 170 180 190 200
CQRKTTLDNK NTLFTDAFEI LAENYEFREN ERSCLSFRQA ASVLKSLTFT
210 220 230 240 250
IAGMADVDGL PGFGDHIRAV IEDLIEDGES SKVSEVLNDE VYRSLKLFTT
260 270 280 290 300
IFGVGLRTAE KWHRLGIRTL EEIKSNENLK FSKMQIAGLQ HYEDILGGVR
310 320 330 340 350
KAEADAVAMV VRDAVWTFLP DAVVTLTGGF RRGNKTGHDV DMLITSPIQG
360 370 380 390 400
KEKELLHKVI NLWKKQDLLL CHTIHESTMD EDNLPSKSVN LLDHFQKCFA
410 420 430 440 450
ILKSNQHRGE ISSCDGPHDS RERGKRIWKA IRVDLVFCPF EQYAFALLGW
460 470 480 490 500
TGSRQFERDL RRYASHEKKM MIDNHALYDK TKRVFVKCES EEEIFGHLGL
510
EYIDPVERNA
Length:510
Mass (Da):58,244
Last modified:August 15, 2003 - v2
<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:iBA83394777EFA6D0
GO
Isoform 2 (identifier: O57486-2) [UniParc]FASTAAdd to basket

The sequence of this isoform differs from the canonical sequence as follows:
     166-222: Missing.

Show »
Length:453
Mass (Da):51,940
Checksum:iD86FA69C9F47BE8D
GO

Alternative sequence

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section describes the sequence of naturally occurring alternative protein isoform(s). The changes in the amino acid sequence may be due to alternative splicing, alternative promoter usage, alternative initiation, or ribosomal frameshifting.<p><a href='/help/var_seq' target='_top'>More...</a></p>Alternative sequenceiVSP_007952166 – 222Missing in isoform 2. 1 PublicationAdd BLAST57

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
AF039209 mRNA Translation: AAB92673.2
AY248700 mRNA Translation: AAO92254.1

Keywords - Coding sequence diversityi

Alternative splicing

<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
AF039209 mRNA Translation: AAB92673.2
AY248700 mRNA Translation: AAO92254.1

3D structure databases

SMRiO57486
ModBaseiSearch...

Family and domain databases

CDDicd00141, NT_POLXc, 1 hit
Gene3Di1.10.150.110, 1 hit
3.30.210.10, 1 hit
3.30.460.10, 1 hit
3.40.50.10190, 1 hit
InterProiView protein in InterPro
IPR001357, BRCT_dom
IPR036420, BRCT_dom_sf
IPR002054, DNA-dir_DNA_pol_X
IPR019843, DNA_pol-X_BS
IPR010996, DNA_pol_b-like_N
IPR028207, DNA_pol_B_palm_palm
IPR018944, DNA_pol_lambd_fingers_domain
IPR027421, DNA_pol_lamdba_lyase_dom_sf
IPR037160, DNA_Pol_thumb_sf
IPR022312, DNA_pol_X
IPR043519, NT_sf
IPR029398, PolB_thumb
IPR027292, TdT
IPR001726, TdT/Mu
PfamiView protein in Pfam
PF00533, BRCT, 1 hit
PF14792, DNA_pol_B_palm, 1 hit
PF14791, DNA_pol_B_thumb, 1 hit
PF10391, DNA_pol_lambd_f, 1 hit
PF14716, HHH_8, 1 hit
PIRSFiPIRSF000817, DNA_NT, 1 hit
PIRSF501175, TDT, 1 hit
PRINTSiPR00869, DNAPOLX
PR00871, DNAPOLXTDT
SMARTiView protein in SMART
SM00292, BRCT, 1 hit
SM00483, POLXc, 1 hit
SUPFAMiSSF47802, SSF47802, 1 hit
SSF52113, SSF52113, 1 hit
SSF81301, SSF81301, 1 hit
PROSITEiView protein in PROSITE
PS50172, BRCT, 1 hit
PS00522, DNA_POLYMERASE_X, 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 nameiTDT_AMBME
<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: O57486
Secondary accession number(s): Q800C6
<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%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: December 15, 1998
Last sequence update: August 15, 2003
Last modified: August 12, 2020
This is version 100 of the entry and version 2 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 programChordata 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

Documents

  1. SIMILARITY comments
    Index of protein domains and families
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