4FK6 image
Deposition Date 2012-06-12
Release Date 2012-11-07
Last Version Date 2024-10-09
Entry Detail
PDB ID:
4FK6
Keywords:
TRANSFERASE/TRANSFERASE INHIBITOR
Title:
JAK1 kinase (JH1 domain) in complex with compound 72
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Spodoptera frugiperda
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.20 Å
R-Value Free:
0.25
R-Value Work:
0.20
R-Value Observed:
0.21
Space Group:
P 1 21 1
4FK6 validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Tyrosine-protein kinase JAK1
Gene (Uniprot):JAK1
Chain IDs:A, B
Chain Length:302
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:P23458 Pfam ID:PF07714 EC:2.7.10.2
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
PTR A TYR O-PHOSPHOTYROSINE
Ligand Molecules
0UJ
Primary Citation
Structure-based discovery of C-2 substituted imidazo-pyrrolopyridine JAK1 inhibitors with improved selectivity over JAK2.
Bioorg.Med.Chem.Lett. 22 7627 7633 (2012)
PMID: 23107482 DOI: 10.1016/j.bmcl.2012.10.008

Abstact

Herein we describe our successful efforts in obtaining C-2 substituted imidazo-pyrrolopyridines with improved JAK1 selectivity relative to JAK2 by targeting an amino acid residue that differs between the two isoforms (JAK1: E966; JAK2: D939). Efforts to improve cellular potency by reducing the polarity of the inhibitors are also detailed. The X-ray crystal structure of a representative inhibitor in complex with the JAK1 enzyme is also disclosed.

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Protein

Chemical

Disease

Primary Citation of related structures
4E4N
4E4L