ISDA

Entry Detail

PDB ID:

5USQ

Keywords:

Transferase/Transferase Inhibitor

Title:

ALK-5 kinase inhibitor complex

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

unidentified baculovirus

PDB Version:

Deposition Date:

2017-02-13

Release Date:

2017-04-12

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.55 Å

R-Value Free:

0.23

R-Value Work:

0.17

R-Value Observed:

0.18

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:TGF-beta receptor type-1
Chain IDs:A
Chain Length:299
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P36897 Pfam ID:PF00069 EC:2.7.10.2

Ligand Molecules

8LY

Primary Citation

Design, synthesis and optimization of 7-substituted-pyrazolo[4,3-b]pyridine ALK5 (activin receptor-like kinase 5) inhibitors.

Sabat, M, Wang, H, Scorah, N, Lawson, J.D, Atienza, J, Kamran, R, Hixon, M.S, Dougan, D.R.Show

Bioorg. Med. Chem. Lett. 27 1955 1961 (2017)

PMID: 28359790 DOI: 10.1016/j.bmcl.2017.03.026

Abstact

A series of potent ALK5 inhibitors were designed using a SBDD approach and subsequently optimized to improve drug likeness. Starting with a 4-substituted quinoline screening hit, SAR was conducted using a ALK5 binding model to understand the binding site and optimize activity. The resulting inhibitors displayed excellent potency but were limited by high in vitro clearance in rat and human microsomes. Using a scaffold morphing strategy, these analogs were transformed into a related pyrazolo[4,3-b]pyridine series with improved ADME properties.

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