Anti-Cyclin T1/CCNT1 Antibody Picoband® Fluoro647 Conjugated

Cyclin-T1 is a protein that in humans is encoded by the CCNT1 gene. This gene encodes a member of the highly conserved cyclin C subfamily. The encoded protein tightly associates with cyclin-dependent kinase 9, and is a major subunit of positive transcription elongation factor b (p-TEFb) . In humans, there are multiple forms of positive transcription elongation factor b, which may include one of several different cyclins along with cyclin-dependent kinase 9. The complex containing the encoded cyclin and cyclin-dependent kinase 9 acts as a cofactor of human immunodeficiency virus type 1 (HIV-1) Tat protein, and is both necessary and sufficient for full activation of viral transcription. This cyclin and its kinase partner are also involved in triggering transcript elongation through phosphorylation of the carboxy-terminal domain of the largest RNA polymerase II subunit. Overexpression of this gene is implicated in tumor growth. Alternative splicing results in multiple transcript variants.

Antiviral Signaling, Cell Biology, Cell Cycle, Epigenetics and Nuclear Signaling, Host-Virus Interaction, Immune System Diseases, Immunology, Interspecies Interaction, Microbiology

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 productive elongation by phosphorylating the CTD (carboxy-terminal domain) of the large subunit of RNA polymerase II (RNA Pol II) . .

1. Entrez Gene: CCNT1 cyclin T1. 2. Peng J, Zhu Y, Milton JT, Price DH (April 1998) . Identification of multiple cyclin subunits of human P-TEFb. Genes Dev. 12 (5) : 755–62. 3. Wei P, Garber ME, Fang SM, Fischer WH, Jones KA (March 1998) . A novel CDK9-associated C-type cyclin interacts ly with HIV-1 Tat and mediates its high-affinity, loop-specific binding to TAR RNA. Cell92 (4) : 451–62.