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Title: A new crystal form of human acetylcholinesterase for exploratory room-temperature crystallography studies

Abstract

Structure-guided design of novel pharmacologically active molecules relies at least in part on functionally relevant accuracy of macromolecular structures for template based drug design. Currently, about 95% of all macromolecular X-ray structures available in the PDB (Protein Data Bank) were obtained from diffraction experiments at low, cryogenic temperatures. However, it is known that functionally relevant conformations of both macromolecules and pharmacological ligands can differ at higher, physiological temperatures. We describe in this article development and properties of new human acetylcholinesterase (AChE) crystals of space group P31 and a new unit cell, amenable for room-temperature X-ray diffraction studies. Here, we co-crystallized hAChE in P31 unit cell with the reversible inhibitor 9-aminoacridine that binds at the base of the active center gorge in addition to inhibitors that span the full length of the gorge, donepezil (Aricept, E2020) and AChE specific inhibitor BW284c51. Their new low temperature P31 space group structures appear similar to those previously obtained in the different P3121 unit cell. Successful solution of the new room temperature 3.2 Å resolution structure of BW284c51*hAChE complex from large P31 crystals enables us to proceed with studying room temperature structures of lower affinity complexes, such as oxime reactivators bound to hAChE, where temperature-relatedmore » conformational diversity could be expected in both oxime and hAChE, which could lead to better informed structure-based design under conditions approaching physiological temperature.« less

Authors:
ORCiD logo [1];  [2];  [3];  [4];  [2];  [5];  [2]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of California San Diego, La Jolla, CA (United States)
  3. The Ohio State Univ., Columbus, OH (United States)
  4. Univ. of Utah, Salt Lake City, UT (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1559608
Alternate Identifier(s):
OSTI ID: 1529996
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Chemico-Biological Interactions
Additional Journal Information:
Journal Volume: 309; Journal Issue: C; Journal ID: ISSN 0009-2797
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 59 BASIC BIOLOGICAL SCIENCES; Human acetylcholinesterase; Room-temperature X-ray structure; Structure-based drug design; Donepezil; 9-Aminoacridine; BW284c51

Citation Formats

Gerlits, Oksana O., Ho, Kwok -Yiu, Cheng, Xiaolin, Blumenthal, Donald, Taylor, Palmer, Kovalevsky, Andrey, and Radić, Zoran. A new crystal form of human acetylcholinesterase for exploratory room-temperature crystallography studies. United States: N. p., 2019. Web. doi:10.1016/j.cbi.2019.06.011.
Gerlits, Oksana O., Ho, Kwok -Yiu, Cheng, Xiaolin, Blumenthal, Donald, Taylor, Palmer, Kovalevsky, Andrey, & Radić, Zoran. A new crystal form of human acetylcholinesterase for exploratory room-temperature crystallography studies. United States. https://doi.org/10.1016/j.cbi.2019.06.011
Gerlits, Oksana O., Ho, Kwok -Yiu, Cheng, Xiaolin, Blumenthal, Donald, Taylor, Palmer, Kovalevsky, Andrey, and Radić, Zoran. Fri . "A new crystal form of human acetylcholinesterase for exploratory room-temperature crystallography studies". United States. https://doi.org/10.1016/j.cbi.2019.06.011. https://www.osti.gov/servlets/purl/1559608.
@article{osti_1559608,
title = {A new crystal form of human acetylcholinesterase for exploratory room-temperature crystallography studies},
author = {Gerlits, Oksana O. and Ho, Kwok -Yiu and Cheng, Xiaolin and Blumenthal, Donald and Taylor, Palmer and Kovalevsky, Andrey and Radić, Zoran},
abstractNote = {Structure-guided design of novel pharmacologically active molecules relies at least in part on functionally relevant accuracy of macromolecular structures for template based drug design. Currently, about 95% of all macromolecular X-ray structures available in the PDB (Protein Data Bank) were obtained from diffraction experiments at low, cryogenic temperatures. However, it is known that functionally relevant conformations of both macromolecules and pharmacological ligands can differ at higher, physiological temperatures. We describe in this article development and properties of new human acetylcholinesterase (AChE) crystals of space group P31 and a new unit cell, amenable for room-temperature X-ray diffraction studies. Here, we co-crystallized hAChE in P31 unit cell with the reversible inhibitor 9-aminoacridine that binds at the base of the active center gorge in addition to inhibitors that span the full length of the gorge, donepezil (Aricept, E2020) and AChE specific inhibitor BW284c51. Their new low temperature P31 space group structures appear similar to those previously obtained in the different P3121 unit cell. Successful solution of the new room temperature 3.2 Å resolution structure of BW284c51*hAChE complex from large P31 crystals enables us to proceed with studying room temperature structures of lower affinity complexes, such as oxime reactivators bound to hAChE, where temperature-related conformational diversity could be expected in both oxime and hAChE, which could lead to better informed structure-based design under conditions approaching physiological temperature.},
doi = {10.1016/j.cbi.2019.06.011},
journal = {Chemico-Biological Interactions},
number = C,
volume = 309,
place = {United States},
year = {Fri Jun 07 00:00:00 EDT 2019},
month = {Fri Jun 07 00:00:00 EDT 2019}
}

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