7QB2

Pim1 in complex with (E)-4-((6-amino-1-methyl-2-oxoindolin-3-ylidene)methyl)benzoic acid and Pimtide

Summary for 7QB2

• Entry DOI: 10.2210/pdb7qb2/pdb
• Descriptor: Serine/threonine-protein kinase pim-1, Pimtide, GLYCEROL, ... (5 entities in total)
• Functional Keywords: serine kinase, kinase, complex, pim1, pim, pim-1, inhibitor, tumorigenisis, cancer, pimtide, proto oncogen, atp, phosphorylation, apoptosis, cell cycle, transferase
• Biological source: Homo sapiens (human); More
• Total number of polymer chains: 2
• Total formula weight: 37562.65

Authors

Hochban, P.M.M.,Heine, A.,Diederich, W.E. (deposition date: 2021-11-18, release date: 2022-11-30, Last modification date: 2024-11-06)

Primary citation

Heyder, L.,Hochban, P.M.M.,Taylor, C.,Chevillard, F.,Siefker, C.,Iking, C.,Borchardt, H.,Aigner, A.,Klebe, G.,Heine, A.,Kolb, P.,Diederich, W.E.
Pose, duplicate, then elaborate: Steps towards increased affinity for inhibitors targeting the specificity surface of the Pim-1 kinase.
Eur.J.Med.Chem., 245:114914-114914, 2023

PubMed Abstract: In this study, fragment-sized hits binding to Pim-1 kinase with initially modest affinity were further optimized by combining computational, synthetic and crystallographic expertise, eventually resulting in potent ligands with affinities in the nanomolar range that address rarely-targeted regions of Pim-1 kinase. Starting from a set of crystallographically validated, chemically distinct fragments that bind to Pim-1 kinase but lack typical nucleotide mimetic structures, a library of extended fragments was built by exhaustive in silico reactions. After docking, minimization, clustering, visual inspection of the top-ranked compounds, and evaluation of ease of synthetic accessibility, either the original compound or a close derivative was synthesized and tested against Pim-1. For compounds showing the highest degree of Pim-1 inhibition the binding mode was determined crystallographically. Following a structure-guided approach, these were further optimized in a subsequent design cycle improving the compound's initial affinity by several orders of magnitude while synthesizing only a comparatively modest number of derivatives. The combination of computational and experimental approaches resulted in the development of a reasonably potent, novel molecular scaffold for inhibition of Pim-1 that targets specific surface regions, such as the interaction with R122 and P123 of the hinge region, which has been less frequently investigated in similar studies.

PubMed: 36410167
DOI: 10.1016/j.ejmech.2022.114914

Experimental method

X-RAY DIFFRACTION (2.53 Å)