CATH Classification

Domain Context

CATH Clusters

Superfamily Transferase(Phosphotransferase) domain 1
Functional Family Cyclin-dependent kinase 9

Enzyme Information

2.7.11.23
[RNA-polymerase]-subunit kinase.
based on mapping to UniProt P50750
ATP + [DNA-directed RNA polymerase] = ADP + [DNA-directed RNA polymerase] phosphate.
-!- Appears to be distinct from other protein phosphokinases. -!- Brings about multiple phosphorylation of the unique C-terminal repeat domain of the largest subunit of eukaryotic EC 2.7.7.6. -!- Does not phosphorylate casein, phosvitin or histone. -!- Formerly EC 2.7.1.141.
2.7.11.22
Cyclin-dependent kinase.
based on mapping to UniProt P50750
ATP + a protein = ADP + a phosphoprotein.
-!- Activation of cyclin-dependent kinases requires association of the enzyme with a regulatory subunit referred to as a cyclin. -!- It is the sequential activation and inactivation of cyclin-dependent kinases, through the periodic synthesis and destruction of cyclins, that provides the primary means of cell-cycle regulation. -!- Formerly EC 2.7.1.37.

UniProtKB Entries (1)

O60563
CCNT1_HUMAN
Homo sapiens
Cyclin-T1

PDB Structure

PDB 4IMY
External Links
Method X-RAY DIFFRACTION
Organism
Primary Citation
The AFF4 scaffold binds human P-TEFb adjacent to HIV Tat.
Schulze-Gahmen, U., Upton, H., Birnberg, A., Bao, K., Chou, S., Krogan, N.J., Zhou, Q., Alber, T.
Elife