8a2o
Room-temperature structure of the stabilised A2A-Theophylline complex determined by synchrotron serial crystallography
Structural highlights
FunctionAA2AR_HUMAN Receptor for adenosine. The activity of this receptor is mediated by G proteins which activate adenylyl cyclase.C562_ECOLX Electron-transport protein of unknown function. Publication Abstract from PubMedSerial crystallography has emerged as an important tool for structural studies of integral membrane proteins. The ability to collect data from micrometre-sized weakly diffracting crystals at room temperature with minimal radiation damage has opened many new opportunities in time-resolved studies and drug discovery. However, the production of integral membrane protein microcrystals in lipidic cubic phase at the desired crystal density and quantity is challenging. This paper introduces VIALS (versatile approach to high-density microcrystals in lipidic cubic phase for serial crystallography), a simple, fast and efficient method for preparing hundreds of microlitres of high-density microcrystals suitable for serial X-ray diffraction experiments at both synchrotron and free-electron laser sources. The method is also of great benefit for rational structure-based drug design as it facilitates in situ crystal soaking and rapid determination of many co-crystal structures. Using the VIALS approach, room-temperature structures are reported of (i) the archaerhodopsin-3 protein in its dark-adapted state and 110 ns photocycle intermediate, determined to 2.2 and 1.7 A, respectively, and (ii) the human A(2A) adenosine receptor in complex with two different ligands determined to a resolution of 3.5 A. A versatile approach to high-density microcrystals in lipidic cubic phase for room-temperature serial crystallography.,Birch J, Kwan TOC, Judge PJ, Axford D, Aller P, Butryn A, Reis RI, Bada Juarez JF, Vinals J, Owen RL, Nango E, Tanaka R, Tono K, Joti Y, Tanaka T, Owada S, Sugahara M, Iwata S, Orville AM, Watts A, Moraes I J Appl Crystallogr. 2023 Aug 18;56(Pt 5):1361-1370. doi: , 10.1107/S1600576723006428. eCollection 2023 Oct 1. PMID:37791355[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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