ISDA

Deposition Date 2014-06-20

Release Date 2014-08-06

Last Version Date 2023-09-27

Entry Detail

PDB ID:

4TTH

Keywords:

TRANSFERASE/CELL CYCLE/INHIBITOR

Title:

Crystal structure of a CDK6/Vcyclin complex with inhibitor bound

Biological Source:

Source Organism:

Saimiriine herpesvirus 2 (Taxon ID: 10383)
Homo sapiens (Taxon ID: 9606)

Host Organism:

Trichoplusia ni

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.90 Å

R-Value Free:

0.33

R-Value Work:

0.23

R-Value Observed:

0.23

Space Group:

P 65 2 2

Download Validation Report

Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Cyclin homolog
Gene (Uniprot):72
Chain IDs:A
Chain Length:254
Number of Molecules:1
Biological Source:Saimiriine herpesvirus 2

UniProt ID:Q01043 Pfam ID:PF00134, PF09241

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Cyclin-dependent kinase 6
Gene (Uniprot):CDK6
Chain IDs:B
Chain Length:326
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:Q00534 Pfam ID:PF00069 EC:2.7.11.22

Ligand Molecules

24V

Primary Citation

Discovery of AMG 925, a FLT3 and CDK4 dual kinase inhibitor with preferential affinity for the activated state of FLT3.

Li, Z, Wang, X, Eksterowicz, J, Gribble, M.W, Alba, G.Q, Ayres, M, Carlson, T.J, Chen, A, Chen, X, Cho, R, Connors, R.V, DeGraffenreid, M, Deignan, J.T, Duquette, J, Fan, P, Fisher, B, Fu, J, Huard, J.N, Kaizerman, J, Keegan, K.S, Li, C, Li, K, Li, Y, Liang, L, Liu, W, Lively, S.E, Lo, M.C, Ma, J, McMinn, D.L, Mihalic, J.T, Modi, K, Ngo, R, Pattabiraman, K, Piper, D.E, Queva, C, Ragains, M.L, Suchomel, J, Thibault, S, Walker, N, Wang, X, Wang, Z, Wanska, M, Wehn, P.M, Weidner, M.F, Zhang, A.J, Zhao, X, Kamb, A, Wickramasinghe, D, Dai, K, McGee, L.R, Medina, J.C.Show

J.Med.Chem. 57 3430 3449 (2014)

PMID: 24641103 DOI: 10.1021/jm500118j

Abstact

We describe the structural optimization of a lead compound 1 that exhibits dual inhibitory activities against FLT3 and CDK4. A series of pyrido[4',3':4,5]pyrrolo[2,3-d]pyrimidine derivatives was synthesized, and SAR analysis, using cell-based assays, led to the discovery of 28 (AMG 925), a potent and orally bioavailable dual inhibitor of CDK4 and FLT3, including many FLT3 mutants reported to date. Compound 28 inhibits the proliferation of a panel of human tumor cell lines including Colo205 (Rb(+)) and U937 (FLT3(WT)) and induced cell death in MOLM13 (FLT3(ITD)) and even in MOLM13 (FLT3(ITD, D835Y)), which exhibits resistance to a number of FLT3 inhibitors currently under clinical development. At well-tolerated doses, compound 28 leads to significant growth inhibition of MOLM13 xenografts in nude mice, and the activity correlates with inhibition of STAT5 and Rb phosphorylation.

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