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Entry version 147 (07 Apr 2021)
Sequence version 1 (01 Nov 1999)
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Protein

Cyclin-T1

Gene

CCNT1

Organism
Equus caballus (Horse)
Status
Reviewed-Annotation score:

Annotation score:4 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

Regulatory subunit of the cyclin-dependent kinase pair (CDK9/cyclin-T1) complex, also called positive transcription elongation factor B (P-TEFb), which is proposed to facilitate the transition from abortive to production elongation by phosphorylating the CTD (C-terminal domain) of the large subunit of RNA polymerase II (RNAP II) (By similarity). In case of equine infectious anemia virus (EIAV) infection, binds to the nuclear transcriptional activator Tat, increasing Tat's affinity for the transactivating response RNA element (TAR RNA). Serves as an essential cofactor for Tat, by promoting RNA Pol II activation, allowing transcription of viral genes.By similarity

<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 functionCyclin
Biological processCell cycle, Cell division, Host-virus interaction, Transcription, Transcription regulation

<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:
Cyclin-T1
Short name:
CycT1
Short name:
Cyclin-T
<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:CCNT1
<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>OrganismiEquus caballus (Horse)
<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 identifieri9796 [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 lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaLaurasiatheriaPerissodactylaEquidaeEquus
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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
  • UP000002281 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes%5Fmanual">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: Unplaced

<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_00000804921 – 727Cyclin-T1Add BLAST727

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section specifies the position and type of each modified residue excluding <a href="http://www.uniprot.org/manual/lipid">lipids</a>, <a href="http://www.uniprot.org/manual/carbohyd">glycans</a> and <a href="http://www.uniprot.org/manual/crosslnk">protein cross-links</a>.<p><a href='/help/mod_res' target='_top'>More...</a></p>Modified residuei117PhosphoserineBy similarity1
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM / Processing</a> section describes <strong>covalent linkages</strong> of various types formed <strong>between two proteins (interchain cross-links)</strong> or <strong>between two parts of the same protein (intrachain cross-links)</strong>, except the disulfide bonds that are annotated in the <a href="http://www.uniprot.org/manual/disulfid">'Disulfide bond'</a> subsection.<p><a href='/help/crosslnk' target='_top'>More...</a></p>Cross-linki343Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in SUMO2)By similarity
Modified residuei390PhosphoserineBy similarity1
Modified residuei392N6-acetyllysineBy similarity1
Cross-linki417Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in SUMO2)By similarity
Cross-linki483Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in SUMO2)By similarity
Modified residuei497PhosphoserineBy similarity1
Modified residuei501PhosphoserineBy similarity1
Modified residuei566PhosphoserineBy similarity1

Keywords - PTMi

Acetylation, Isopeptide bond, Phosphoprotein, Ubl conjugation

Proteomic databases

PaxDb, a database of protein abundance averages across all three domains of life

More...
PaxDbi
Q9XT26

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

Gene expression databases

Bgee dataBase for Gene Expression Evolution

More...
Bgeei
ENSECAG00000015768, Expressed in trophectoderm and 22 other tissues

<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%5Fsection">'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%5Fsection">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Cyclin-T1 is the predominant cyclin that associates with CDK9 to form a heterodimer called P-TEFb. P-TEFb forms a complex with AFF4/AF5Q31.

Component of a complex which is at least composed of HTATSF1/Tat-SF1, P-TEFb complex, RNA pol II, SUPT5H, and NCL/nucleolin.

Component of the 7SK snRNP complex at least composed of P-TEFb (composed of CDK9 and CCNT1/cyclin-T1), HEXIM1, HEXIM2, BCDIN3, SART3 proteins and 7SK and U6 snRNAs.

Interacts with BRD4, targets chromatin binding.

Interacts with JMJD6.

Interacts with MDFIC.

Interacts with HSF1.

Interacts with HTATSF1.

Interacts with AFF4.

Interacts with TBX21.

By similarity

<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

1727
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
Q9XT26

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
Q9XT26

<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

Coiled coil

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and domains' section denotes the positions of regions of coiled coil within the protein.<p><a href='/help/coiled' target='_top'>More...</a></p>Coiled coili386 – 427Sequence analysisAdd BLAST42

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>Motifi253 – 270Nuclear localization signal, and interaction with Tat-TAR RNASequence analysisAdd BLAST18

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes the position of regions of compositional bias within the protein and the particular amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi508 – 532His-richAdd BLAST25
Compositional biasi550 – 573Ser-richAdd BLAST24
Compositional biasi709 – 726Pro-richAdd BLAST18

<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 cyclin family. Cyclin C subfamily.Curated

Keywords - Domaini

Coiled coil

Phylogenomic databases

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_012994_1_0_1

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
Q9XT26

Identification of Orthologs from Complete Genome Data

More...
OMAi
FCLQYSP

Database of Orthologous Groups

More...
OrthoDBi
1437076at2759

TreeFam database of animal gene trees

More...
TreeFami
TF101014

Family and domain databases

Conserved Domains Database

More...
CDDi
cd00043, CYCLIN, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR028863, CCNT1
IPR013763, Cyclin-like
IPR036915, Cyclin-like_sf
IPR043198, Cyclin/Ssn8
IPR006671, Cyclin_N

The PANTHER Classification System

More...
PANTHERi
PTHR10026, PTHR10026, 1 hit
PTHR10026:SF42, PTHR10026:SF42, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00134, Cyclin_N, 1 hit

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00385, CYCLIN, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF47954, SSF47954, 2 hits

<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>Sequencei

<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.

Q9XT26-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MEGERKNNNK RWYFTREQLE NSPSRRFGLD PDKELSYRQQ AANLLQDMGQ
60 70 80 90 100
RLNVSQLTIN TAIVYMHRFY MIQSFTQFHR NSVAPAALFL AAKVEEQPKK
110 120 130 140 150
LEHVIKVAHA CLHPQESLPD TRSEAYLQQV QDLVILESII LQTLGFELTI
160 170 180 190 200
DHPHTHVVKC TQLVRASKDL AQTSYFMATN SLHLTTFSLQ YTPPVVACVC
210 220 230 240 250
IHLACKWSNW EIPVSTDGKH WWEYVDATVT LELLDELTHE FLQILEKTPN
260 270 280 290 300
RLKRIRNWRA CQAAKKTKAD DRGTDENTSE QTILNMISQS SSDTTIAGLM
310 320 330 340 350
SMSTSSTTST VPSLPTTEES SSNLSGVEML QGERWLSSQP PFKLEPAQGH
360 370 380 390 400
RTSENLALIG VDHSLQQDGS NAFISQKQNS SKSVPSAKVS LKEYRAKHAE
410 420 430 440 450
ELAAQKRQLE NMEANVKSQY AYAAQNLLSH HDSHSSVILK MPIEGSENPE
460 470 480 490 500
RPFLEKPDKT ALKMRIPVAS GDKAASSKPE EIKMRIKVHA APDKHNSIDD
510 520 530 540 550
SVTKSREHKE KHKTHPSNHH HHHNHHSHKH SHSQLPAGTG NKRPGDPKHS
560 570 580 590 600
SQTSTLAHKT YSLSSSFSSS SSSRKRGPPE ETGGALFDHP AKIAKSTKSS
610 620 630 640 650
SINFFPPLPT MAQLPGHSSD TSGLPFSQPS CKTRVPHMKL DKGPTGANGH
660 670 680 690 700
NTTQTIDYQD TVNMLHSLLH AQGVQPTQPP ALEFVHSYGE YLNPRAGGMP
710 720
SRSGNTDKPR LPPLPSEPPP PLPPLPK
Length:727
Mass (Da):81,013
Last modified:November 1, 1999 - 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:iBFC2A398D6B35BCE
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.<p><a href='/help/conflict' target='_top'>More...</a></p>Sequence conflicti96E → G in AAF04138 (PubMed:10623752).Curated1
Sequence conflicti256R → W in AAF04138 (PubMed:10623752).Curated1
Sequence conflicti262Q → E in AAF04138 (PubMed:10623752).Curated1
Sequence conflicti277N → K in AAF04138 (PubMed:10623752).Curated1
Sequence conflicti359I → T in AAF04138 (PubMed:10623752).Curated1
Sequence conflicti537A → V in AAF04138 (PubMed:10623752).Curated1
Sequence conflicti681A → T in AAF04138 (PubMed:10623752).Curated1
Sequence conflicti687S → P in AAF04138 (PubMed:10623752).Curated1
Sequence conflicti699M → I in AAF04138 (PubMed:10623752).Curated1
Sequence conflicti711L → P in AAF04138 (PubMed:10623752).Curated1

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
AF137509 mRNA Translation: AAD38518.1
AF190905 mRNA Translation: AAF04138.1

NCBI Reference Sequences

More...
RefSeqi
NP_001075315.1, NM_001081846.1

Genome annotation databases

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
100033893

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ecb:100033893

<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
AF137509 mRNA Translation: AAD38518.1
AF190905 mRNA Translation: AAF04138.1
RefSeqiNP_001075315.1, NM_001081846.1

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
2W2HX-ray3.25A/B5-267[»]
SMRiQ9XT26
ModBaseiSearch...
PDBe-KBiSearch...

Proteomic databases

PaxDbiQ9XT26

Genome annotation databases

GeneIDi100033893
KEGGiecb:100033893

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
904

Phylogenomic databases

HOGENOMiCLU_012994_1_0_1
InParanoidiQ9XT26
OMAiFCLQYSP
OrthoDBi1437076at2759
TreeFamiTF101014

Miscellaneous databases

EvolutionaryTraceiQ9XT26

Gene expression databases

BgeeiENSECAG00000015768, Expressed in trophectoderm and 22 other tissues

Family and domain databases

CDDicd00043, CYCLIN, 1 hit
InterProiView protein in InterPro
IPR028863, CCNT1
IPR013763, Cyclin-like
IPR036915, Cyclin-like_sf
IPR043198, Cyclin/Ssn8
IPR006671, Cyclin_N
PANTHERiPTHR10026, PTHR10026, 1 hit
PTHR10026:SF42, PTHR10026:SF42, 1 hit
PfamiView protein in Pfam
PF00134, Cyclin_N, 1 hit
SMARTiView protein in SMART
SM00385, CYCLIN, 1 hit
SUPFAMiSSF47954, SSF47954, 2 hits

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

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 nameiCCNT1_HORSE
<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: Q9XT26
Secondary accession number(s): Q9TTX6
<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 1, 2000
Last sequence update: November 1, 1999
Last modified: April 7, 2021
This is version 147 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 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

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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