5I1Q

Second bromodomain of TAF1 bound to a pyrrolopyridone compound

Summary for 5I1Q

• Entry DOI: 10.2210/pdb5i1q/pdb
• Related: 5I29
• Descriptor: Transcription initiation factor TFIID subunit 1, 3-[6-(but-3-en-1-yl)-7-oxo-6,7-dihydro-1H-pyrrolo[2,3-c]pyridin-4-yl]-N,N-dimethylbenzamide (3 entities in total)
• Functional Keywords: taf1(2) second bromodomain of taf1 small-molecule ligand bound, protein binding-inhibitor complex, protein binding/inhibitor
• Biological source: Homo sapiens (Human)
• Cellular location: Nucleus : P21675
• Total number of polymer chains: 1
• Total formula weight: 16912.00

Authors

Tang, Y.,Poy, F.,Bellon, S.F. (deposition date: 2016-01-09, release date: 2016-06-08, Last modification date: 2023-09-27)

Primary citation

Crawford, T.D.,Tsui, V.,Flynn, E.M.,Wang, S.,Taylor, A.M.,Cote, A.,Audia, J.E.,Beresini, M.H.,Burdick, D.J.,Cummings, R.,Dakin, L.A.,Duplessis, M.,Good, A.C.,Hewitt, M.C.,Huang, H.R.,Jayaram, H.,Kiefer, J.R.,Jiang, Y.,Murray, J.,Nasveschuk, C.G.,Pardo, E.,Poy, F.,Romero, F.A.,Tang, Y.,Wang, J.,Xu, Z.,Zawadzke, L.E.,Zhu, X.,Albrecht, B.K.,Magnuson, S.R.,Bellon, S.,Cochran, A.G.
Diving into the Water: Inducible Binding Conformations for BRD4, TAF1(2), BRD9, and CECR2 Bromodomains.
J.Med.Chem., 59:5391-5402, 2016

PubMed Abstract: The biological role played by non-BET bromodomains remains poorly understood, and it is therefore imperative to identify potent and highly selective inhibitors to effectively explore the biology of individual bromodomain proteins. A ligand-efficient nonselective bromodomain inhibitor was identified from a 6-methyl pyrrolopyridone fragment. Small hydrophobic substituents replacing the N-methyl group were designed directing toward the conserved bromodomain water pocket, and two distinct binding conformations were then observed. The substituents either directly displaced and rearranged the conserved solvent network, as in BRD4(1) and TAF1(2), or induced a narrow hydrophobic channel adjacent to the lipophilic shelf, as in BRD9 and CECR2. The preference of distinct substituents for individual bromodomains provided selectivity handles useful for future lead optimization efforts for selective BRD9, CECR2, and TAF1(2) inhibitors.

PubMed: 27219867
DOI: 10.1021/acs.jmedchem.6b00264

Experimental method

X-RAY DIFFRACTION (1.5 Å)