7Q7R image
Entry Detail
PDB ID:
7Q7R
Keywords:
Title:
Crystal structure of human BCL6 BTB domain in complex with compound 1
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2021-11-09
Release Date:
2022-06-15
Method Details:
Experimental Method:
Resolution:
1.70 Å
R-Value Free:
0.20
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 61 2 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:B-cell lymphoma 6 protein
Chain IDs:A
Chain Length:144
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation

Abstact

To identify new chemical series with enhanced binding affinity to the BTB domain of B-cell lymphoma 6 protein, we targeted a subpocket adjacent to Val18. With no opportunities for strong polar interactions, we focused on attaining close shape complementarity by ring fusion onto our quinolinone lead series. Following exploration of different sized rings, we identified a conformationally restricted core which optimally filled the available space, leading to potent BCL6 inhibitors. Through X-ray structure-guided design, combined with efficient synthetic chemistry to make the resulting novel core structures, a >300-fold improvement in activity was obtained by the addition of seven heavy atoms.

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Primary Citation of related structures