ISDA

Entry Detail

PDB ID:

6PDJ

Keywords:

SIGNALING PROTEIN/INHIBITOR

Title:

Tyrosine-protein kinase LCK bound to Compound 11

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

Spodoptera frugiperda

PDB Version:

Deposition Date:

2019-06-19

Release Date:

2019-10-09

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.81 Å

R-Value Free:

0.21

R-Value Work:

0.16

R-Value Observed:

0.16

Space Group:

P 21 21 21

Download Validation Report

Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Tyrosine-protein kinase Lck
Chain IDs:A
Chain Length:288
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P06239 Pfam ID:PF07714 EC:2.7.10.2

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
PTR	A	TYR	modified residue

Ligand Molecules

CXS

ODJ

SO4

Primary Citation

Discovery of Pyridazinone and Pyrazolo[1,5-a]pyridine Inhibitors of C-Terminal Src Kinase.

O'Malley, D.P, Ahuja, V, Fink, B, Cao, C, Wang, C, Swanson, J, Wee, S, Gavai, A.V, Tokarski, J, Critton, D, Paiva, A.A, Johnson, B.M, Szapiel, N, Xie, D.Show

Acs Med.Chem.Lett. 10 1486 1491 (2019)

PMID: 31620238 DOI: 10.1021/acsmedchemlett.9b00354

Abstact

C-terminal Src kinase (CSK) functions as a negative regulator of T cell activation through inhibitory phosphorylation of LCK, so inhibitors of CSK are of interest as potential immuno-oncology agents. Screening of an internal kinase inhibitor collection identified pyridazinone lead 1, and a series of modifications led to optimized compound 13. Compound 13 showed potent activity in biochemical and cellular assays in vitro and demonstrated the ability to increase T cell proliferation induced by T cell receptor signaling. Compound 13 gave extended exposure in mice upon oral dosing and produced a functional response (decrease in LCK phosphorylation) in mouse spleens at 6 h post dose.

Legend

Protein

Chemical

Disease

Primary Citation of related structures