ISDA

Entry Detail

PDB ID:

5FBN

Keywords:

TRANSFERASE

Title:

BTK kinase domain with inhibitor 1

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

Spodoptera frugiperda

PDB Version:

Deposition Date:

2015-12-14

Release Date:

2016-02-03

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.80 Å

R-Value Free:

0.22

R-Value Work:

0.17

R-Value Observed:

0.18

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Tyrosine-protein kinase BTK
Chain IDs:A (auth: C), B (auth: D)
Chain Length:271
Number of Molecules:2
Biological Source:Homo sapiens

UniProt ID:Q06187 Pfam ID:PF07714 EC:2.7.10.2

Ligand Molecules

5WE

5WF

EDO

Primary Citation

Discovery of 8-Amino-imidazo[1,5-a]pyrazines as Reversible BTK Inhibitors for the Treatment of Rheumatoid Arthritis.

Liu, J, Guiadeen, D, Krikorian, A, Gao, X, Wang, J, Boga, S.B, Alhassan, A.B, Yu, Y, Vaccaro, H, Liu, S, Yang, C, Wu, H, Cooper, A, de Man, J, Kaptein, A, Maloney, K, Hornak, V, Gao, Y.D, Fischmann, T.O, Raaijmakers, H, Vu-Pham, D, Presland, J, Mansueto, M, Xu, Z, Leccese, E, Zhang-Hoover, J, Knemeyer, I, Garlisi, C.G, Bays, N, Stivers, P, Brandish, P.E, Hicks, A, Kim, R, Kozlowski, J.A.Show

Acs Med.Chem.Lett. 7 198 203 (2016)

PMID: 26985298 DOI: 10.1021/acsmedchemlett.5b00463

Abstact

Bruton's tyrosine kinase (BTK) is a Tec family kinase with a well-defined role in the B cell receptor (BCR) pathway. It has become an attractive kinase target for selective B cell inhibition and for the treatment of B cell related diseases. We report a series of compounds based on 8-amino-imidazo[1,5-a]pyrazine that are potent reversible BTK inhibitors with excellent kinase selectivity. Selectivity is achieved through specific interactions of the ligand with the kinase hinge and driven by aminopyridine hydrogen bondings with Ser538 and Asp539, and by hydrophobic interaction of trifluoropyridine in the back pocket. These interactions are evident in the X-ray crystal structure of the lead compounds 1 and 3 in the complex with the BTK enzyme. Our lead compounds show desirable PK profiles and efficacy in the preclinical rat collagen induced arthritis model.

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