6YMA image
Entry Detail
PDB ID:
6YMA
Keywords:
Title:
MicroED structure of acetazolamide-bound human carbonic anhydrase II
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2020-04-08
Release Date:
2020-08-12
Method Details:
Experimental Method:
Resolution:
2.50 Å
R-Value Free:
0.25
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:carbonic anhydrase 2
Chain IDs:A
Chain Length:260
Number of Molecules:1
Biological Source:Homo sapiens
Primary Citation
Visualizing drug binding interactions using microcrystal electron diffraction.
Commun Biol 3 417 417 (2020)
PMID: 32737395 DOI: 10.1038/s42003-020-01155-1

Abstact

Visualizing ligand binding interactions is important for structure-based drug design and fragment-based screening methods. Rapid and uniform soaking with potentially reduced lattice defects make small macromolecular crystals attractive targets for studying drug binding using microcrystal electron diffraction (MicroED). However, so far no drug binding interactions could unambiguously be resolved by electron diffraction alone. Here, we use MicroED to study the binding of a sulfonamide inhibitor to human carbonic anhydrase isoform II (HCA II). We show that MicroED data can efficiently be collected on a conventional transmission electron microscope from thin hydrated microcrystals soaked with the clinical drug acetazolamide (AZM). The data are of high enough quality to unequivocally fit and resolve the bound inhibitor. We anticipate MicroED can play an important role in facilitating in-house fragment screening for drug discovery, complementing existing methods in structural biology such as X-ray and neutron diffraction.

Legend

Protein

Chemical

Disease

Primary Citation of related structures