Gene Symbol: Ccnt1
Description: cyclin T1
Alias: cyclin-T1
Species: rat
Products:     Ccnt1

Top Publications

  1. Peng J, Zhu Y, Milton J, Price D. Identification of multiple cyclin subunits of human P-TEFb. Genes Dev. 1998;12:755-62 pubmed
    ..Cyclin T2 has two forms (T2a and T2b) because of alternative splicing. Both cyclin T1 and T2 are ubiquitously expressed...
  2. Young T, Wang Q, PE ERY T, Mathews M. The human I-mfa domain-containing protein, HIC, interacts with cyclin T1 and modulates P-TEFb-dependent transcription. Mol Cell Biol. 2003;23:6373-84 pubmed
    ..The cyclin T1 subunit of P-TEFb engages cellular transcription factors as well as the human immunodeficiency virus type 1 (HIV-..
  3. Kurosu T, Zhang F, Peterlin B. Transcriptional activity and substrate recognition of cyclin T2 from P-TEFb. Gene. 2004;343:173-9 pubmed
    ..Moreover, this domain bound RNAPII via its CTD and PIE-1 blocked its effects. Thus, CycT2 not only contains two domains that target RNAPII but this substrate recognition is necessary for its transcriptional activity via DNA. ..
  4. Pirngruber J, Shchebet A, Schreiber L, Shema E, Minsky N, Chapman R, et al. CDK9 directs H2B monoubiquitination and controls replication-dependent histone mRNA 3'-end processing. EMBO Rep. 2009;10:894-900 pubmed publisher
    ..Thus, CDK9 acts to integrate phosphorylation during transcription with chromatin modifications to control co-transcriptional histone mRNA processing. ..
  5. Zhou J, Zhou S. Protective effect of berberine on antioxidant enzymes and positive transcription elongation factor b expression in diabetic rat liver. Fitoterapia. 2011;82:184-9 pubmed publisher
    ..P-TEFb (composed of cyclin-dependent kinase 9 and cyclin T1) mRNA and protein expression in liver tissue were detected by real time PCR and immunohistochemistry, ..
  6. Dai Q, Lei T, Zhao C, Zhong J, Tang Y, Chen B, et al. Cyclin K-containing kinase complexes maintain self-renewal in murine embryonic stem cells. J Biol Chem. 2012;287:25344-52 pubmed publisher
    ..Importantly, knockdown of either kinase resulted in differentiation. Thus, our studies have uncovered two novel protein kinase complexes that maintain self-renewal in embryonic stem cells. ..
  7. Kim H, Choi B, Kim S, Roh T, Park J, Yoon C. NUCKS1, a novel Tat coactivator, plays a crucial role in HIV-1 replication by increasing Tat-mediated viral transcription on the HIV-1 LTR promoter. Retrovirology. 2014;11:67 pubmed publisher
    ..However, NUCKS1 expression did not increase Tat nuclear localization and interaction with Cyclin T1. Interestingly, the NUCKS1 expression level was lower in latently HIV-1-infected cells than in uninfected parent ..
  8. Nguyen V, Kiss T, Michels A, Bensaude O. 7SK small nuclear RNA binds to and inhibits the activity of CDK9/cyclin T complexes. Nature. 2001;414:322-5 pubmed
    ..the largest polymerase subunit by a transcription elongation factor, P-TEFb, which comprises the kinase CDK9 and cyclin T1 or T2 (ref. 1)...
  9. Sano M, Wang S, Shirai M, Scaglia F, Xie M, Sakai S, et al. Activation of cardiac Cdk9 represses PGC-1 and confers a predisposition to heart failure. EMBO J. 2004;23:3559-69 pubmed
    ..processing; Cdk9 activity was required for hypertrophy in culture, whereas heart-specific activation of Cdk9 by cyclin T1 provoked hypertrophy in mice...

More Information


  1. Brès V, Gomes N, Pickle L, Jones K. A human splicing factor, SKIP, associates with P-TEFb and enhances transcription elongation by HIV-1 Tat. Genes Dev. 2005;19:1211-26 pubmed
    ..These findings suggest that SKIP plays independent roles in transcription elongation and pre-mRNA splicing. ..
  2. Nojima M, Huang Y, Tyagi M, Kao H, Fujinaga K. The positive transcription elongation factor b is an essential cofactor for the activation of transcription by myocyte enhancer factor 2. J Mol Biol. 2008;382:275-87 pubmed publisher
    The positive transcription elongation factor b (P-TEFb), composed of cyclin-dependent kinase 9 and cyclin T1, stimulates the elongation of transcription by hyperphosphorylating the C-terminal region of RNA polymerase II...
  3. Song S, Kim A, Ragoczy T, Bender M, Groudine M, Dean A. Multiple functions of Ldb1 required for beta-globin activation during erythroid differentiation. Blood. 2010;116:2356-64 pubmed publisher
    ..Ldb1 contributes these critical functions at both embryonic and adult stages of globin gene expression. These results implicate Ldb1 as a factor that facilitates nuclear relocation for transcription activation. ..
  4. Kwak H, Lis J. Control of transcriptional elongation. Annu Rev Genet. 2013;47:483-508 pubmed publisher
    ..We then discuss Pol II elongation through the bodies of genes and the roles of FACT and SPT6, factors that allow Pol II to move through nucleosomes. ..