4E4L: Jak1 Kinase (Jh1 Domain) In Complex With Compound 30

Citation:
Abstract
A therapeutic rationale is proposed for the treatment of inflammatory diseases, such as rheumatoid arthritis (RA), by specific targeting of the JAK1 pathway. Examination of the preferred binding conformation of clinically effective, pan-JAK inhibitor 1 led to identification of a novel, tricyclic hinge binding scaffold 3. Exploration of SAR through a series of cycloamino and cycloalkylamino analogues demonstrated this template to be highly tolerant of substitution, with a predisposition to moderate selectivity for the JAK1 isoform over JAK2. This study culminated in the identification of subnanomolar JAK1 inhibitors such as 22 and 49, having excellent cell potency, good rat pharmacokinetic characteristics, and excellent kinase selectivity. Determination of the binding modes of the series in JAK1 and JAK2 by X-ray crystallography supported the design of analogues to enhance affinity and selectivity.
PDB ID: 4E4LDownload
MMDB ID: 100136
PDB Deposition Date: 2012/3/13
Updated in MMDB: 2012/07
Experimental Method:
x-ray diffraction
Resolution: 2  Å
Source Organism:
Similar Structures:
Biological Unit for 4E4L: monomeric; determined by author and by software (PISA)
Molecular Components in 4E4L
Label Count Molecule
Protein (1 molecule)
1
Tyrosine-protein Kinase Jak1(Gene symbol: JAK1)
Molecule annotation
Chemical (1 molecule)
1
1
* Click molecule labels to explore molecular sequence information.

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