4ZIM

CRYSTAL STRUCTURE OF JANUS KINASE 2 IN COMPLEX WITH A 9H-CARBAZOLE-1-CARBOXAMIDE INHIBITOR

• PDB DOI: https://doi.org/10.2210/pdb4ZIM/pdb

• Classification: Transferase/Transferase Inhibitor
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2015-04-28 Released: 2015-06-03 
• Deposition Author(s): Sack, J.S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.65 Å
• R-Value Free: 0.274 
• R-Value Work: 0.202 
• R-Value Observed: 0.204 

Literature

9H-Carbazole-1-carboxamides as potent and selective JAK2 inhibitors.

Zimmermann, K., Sang, X., Mastalerz, H.A., Johnson, W.L., Zhang, G., Liu, Q., Batt, D., Lombardo, L.J., Vyas, D., Trainor, G.L., Tokarski, J.S., Lorenzi, M.V., You, D., Gottardis, M.M., Lippy, J., Khan, J., Sack, J.S., Purandare, A.V.

(2015) Bioorg Med Chem Lett 25: 2809-2812

• PubMed: 25987372 
• DOI: https://doi.org/10.1016/j.bmcl.2015.04.101
• Primary Citation of Related Structures:  
  4ZIM


• PubMed Abstract: 
  

  The discovery, synthesis, and characterization of 9H-carbazole-1-carboxamides as potent and selective ATP-competitive inhibitors of Janus kinase 2 (JAK2) are discussed. Optimization for JAK family selectivity led to compounds 14 and 21, with greater than 45-fold selectivity for JAK2 over all other members of the JAK kinase family.

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Organizational Affiliation: 

Bristol-Myers Squibb Co., 5 Research Parkway, Wallingford, CT 06492-1951, USA. Electronic address: [e-mail].

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 76.67 kDa 
• Atom Count: 5,118 
• Modelled Residue Count: 583 
• Deposited Residue Count: 642 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Tyrosine-protein kinase JAK2	A, B	321	Homo sapiens	Mutation(s): 0  Gene Names: JAK2 EC: 2.7.10.2
UniProt & NIH Common Fund Data Resources
Find proteins for O60674 (Homo sapiens) Explore O60674  Go to UniProtKB:  O60674
PHAROS:  O60674 GTEx:  ENSG00000096968

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
4OK	C [auth A], D [auth B]	3-(3,4-dichlorophenyl)-6-(morpholin-4-ylcarbonyl)-9H-carbazole-1-carboxamide C24 H19 Cl2 N3 O3 FYEWVKCORNQLFP-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PTR	A, B	L-PEPTIDE LINKING	C9 H12 N O6 P		TYR

Binding Affinity Annotations
ID	Source	Binding Affinity
4OK	BindingDB:  4ZIM	IC50: min: 2.4, max: 200 (nM) from 2 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.65 Å
• R-Value Free: 0.274 
• R-Value Work: 0.202 
• R-Value Observed: 0.204 
• Space Group: P 4₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 112.39	α = 90
b = 112.39	β = 90
c = 70.81	γ = 90

Software Package:

Software Name	Purpose
BUSTER	refinement
DENZO	data reduction
SCALEPACK	data scaling
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-06-03 
Deposition Author(s): Sack, J.S.

Revision History  

• Version 1.0: 2015-06-03
  Type: Initial release
  
• Version 1.1: 2015-06-17
  Changes: Database references
• Version 1.2: 2016-07-20
  Changes: Data collection
• Version 1.3: 2017-11-22
  Changes: Derived calculations, Refinement description
• Version 1.4: 2024-10-23
  Changes: Data collection, Database references, Structure summary