Active FLT3 phosphorylates CDKN1B

Stable Identifier
Reaction [transition]
Homo sapiens
Locations in the PathwayBrowser
SVG |   | PPTX  | SBGN
Click the image above or here to open this reaction in the Pathway Browser
The layout of this reaction may differ from that in the pathway view due to the constraints in pathway layout
Active FLT3 binds to the cyclin dependent kinase inihibitor CDKN1B (also known as p27 KIP1) and phosphorylates it at tyrosine 88. (Peschel et al, 2017). Phosphorylation at Y88 dislodges the 3-10 helix of CDKN1B from the active site of CDK2 or CDK4, thus paritally relieving CDKN1B-dependent inhibition (Grimmler et al. 2007). This enables CDK2 (and possibly CDK4) to phosphorylate CDKN1B on threonine residue T187, which is a prerequisite for ubiquitin-mediated degradation of CDKN1B (Montagnoli et al. 1999, Grimmler et al. 2007).
Literature References
PubMed ID Title Journal Year
10323868 Ubiquitination of p27 is regulated by Cdk-dependent phosphorylation and trimeric complex formation

Eytan, E, Draetta, GF, Hershko, A, Montagnoli, A, Pagano, M, Carrano, AC, Fiore, F

Genes Dev 1999
17254966 Cdk-inhibitory activity and stability of p27Kip1 are directly regulated by oncogenic tyrosine kinases

Keidel, EM, Jäkel, H, Grimmler, M, Mund, T, Cilensek, Z, Hengst, L, Waddell, MB, Wang, Y, Kriwacki, RW, Kullmann, M

Cell 2007
28522571 FLT3 and FLT3-ITD phosphorylate and inactivate the cyclin-dependent kinase inhibitor p27Kip1 in acute myeloid leukemia

Jäkel, H, Duyster, J, Nachbaur, D, Götze, KS, Sill, H, Taschler, M, Hengst, L, Podmirseg, SR, Peschel, I

Haematologica 2017
Catalyst Activity

protein tyrosine kinase activity of Active FLT3 [plasma membrane]

Orthologous Events
Cite Us!