5FBN

BTK kinase domain with inhibitor 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.182 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

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.

(2016) ACS Med Chem Lett 7: 198-203

  • DOI: 10.1021/acsmedchemlett.5b00463
  • Primary Citation of Related Structures:  
    5FBN, 5FBO

  • PubMed Abstract: 
  • 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 ...

    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.


    Organizational Affiliation

    Department of Early Development and Discovery Sciences, Merck Research Laboratories , 126 East Lincoln Avenue, Rahway, New Jersey 07065, United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tyrosine-protein kinase BTKA [auth C],
B [auth D]
271Homo sapiensMutation(s): 0 
Gene Names: BTKAGMX1ATKBPK
EC: 2.7.10.2
UniProt & NIH Common Fund Data Resources
Find proteins for Q06187 (Homo sapiens)
Explore Q06187 
Go to UniProtKB:  Q06187
PHAROS:  Q06187
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ06187
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
5WF
Query on 5WF

Download Ideal Coordinates CCD File 
C,
G [auth D]
4-[8-azanyl-3-[(3~{R})-1-(3-methyloxetan-3-yl)carbonylpiperidin-3-yl]imidazo[1,5-a]pyrazin-1-yl]-~{N}-[4-(trifluoromethyl)pyridin-2-yl]benzamide
C29 H28 F3 N7 O3
AHBFBRPGNOVEBK-LJQANCHMSA-N
 Ligand Interaction
5WE
Query on 5WE

Download Ideal Coordinates CCD File 
D [auth C],
H [auth D],
I [auth D],
J [auth D]
4-[8-azanyl-3-[(2~{S})-1-[4-(dimethylamino)butanoyl]pyrrolidin-2-yl]imidazo[1,5-a]pyrazin-1-yl]-~{N}-(1,3-thiazol-2-yl)benzamide
C26 H30 N8 O2 S
HUXVNVAKNWKLJM-IBGZPJMESA-N
 Ligand Interaction
EDO
Query on EDO

Download Ideal Coordinates CCD File 
K [auth D]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
E [auth C],
F [auth D]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
5WF BindingDB:  5FBN IC50: min: 0.27, max: 120 (nM) from 4 assay(s)
EC50: 10 (nM) from 1 assay(s)
Binding MOAD:  5FBN IC50: 0.27 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.182 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.262α = 90
b = 71.475β = 90.68
c = 103.056γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
REFMACphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-02-03
    Type: Initial release
  • Version 1.1: 2016-03-30
    Changes: Database references
  • Version 1.2: 2019-04-24
    Changes: Data collection, Source and taxonomy