6FI0

Crystal structure of BAZ2A PHD zinc finger in complex with Fr 19

Summary for 6FI0

• Entry DOI: 10.2210/pdb6fi0/pdb
• Descriptor: Bromodomain adjacent to zinc finger domain protein 2A, ZINC ION, PHOSPHATE ION, ... (7 entities in total)
• Functional Keywords: transcription, phd zinc finger, bromodomain, baz2a, fragment, fr 19, fr19, epigenetic, ligandability
• Biological source: Homo sapiens (Human)
• Cellular location: Nucleus, nucleolus : Q9UIF9
• Total number of polymer chains: 4
• Total formula weight: 27856.76

Authors

Amato, A.,Lucas, X.,Bortoluzzi, A.,Wright, D.,Ciulli, A. (deposition date: 2018-01-16, release date: 2018-03-21, Last modification date: 2024-01-17)

Primary citation

Amato, A.,Lucas, X.,Bortoluzzi, A.,Wright, D.,Ciulli, A.
Targeting Ligandable Pockets on Plant Homeodomain (PHD) Zinc Finger Domains by a Fragment-Based Approach.
ACS Chem. Biol., 13:915-921, 2018

PubMed Abstract: Plant homeodomain (PHD) zinc fingers are histone reader domains that are often associated with human diseases. Despite this, they constitute a poorly targeted class of readers, suggesting low ligandability. Here, we describe a successful fragment-based campaign targeting PHD fingers from the proteins BAZ2A and BAZ2B as model systems. We validated a pool of in silico fragments both biophysically and structurally and solved the first crystal structures of PHD zinc fingers in complex with fragments bound to an anchoring pocket at the histone binding site. The best-validated hits were found to displace a histone H3 tail peptide in competition assays. This work identifies new chemical scaffolds that provide suitable starting points for future ligand optimization using structure-guided approaches. The demonstrated ligandability of the PHD reader domains could pave the way for the development of chemical probes to drug this family of epigenetic readers.

PubMed: 29529862
DOI: 10.1021/acschembio.7b01093

Experimental method

X-RAY DIFFRACTION (1.9 Å)