1AX9

ACETYLCHOLINESTERASE COMPLEXED WITH EDROPHONIUM, LAUE DATA

Summary for 1AX9

• Entry DOI: 10.2210/pdb1ax9/pdb
• Descriptor: ACETYLCHOLINESTERASE, EDROPHONIUM ION (3 entities in total)
• Functional Keywords: hydrolase, carboxylic esterase, serine esterase, synapse
• Biological source: Torpedo californica (Pacific electric ray)
• Cellular location: Isoform H: Cell membrane; Lipid-anchor, GPI- anchor. Isoform T: Cell membrane; Peripheral membrane protein: P04058
• Total number of polymer chains: 1
• Total formula weight: 60902.76

Authors

Raves, M.L.,Ravelli, R.B.G.,Sussman, J.L.,Harel, M.,Silman, I. (deposition date: 1997-11-03, release date: 1998-02-11, Last modification date: 2024-10-30)

Primary citation

Ravelli, R.B.,Raves, M.L.,Ren, Z.,Bourgeois, D.,Roth, M.,Kroon, J.,Silman, I.,Sussman, J.L.
Static Laue diffraction studies on acetylcholinesterase.
Acta Crystallogr.,Sect.D, 54:1359-1366, 1998

PubMed Abstract: Acetylcholinesterase (AChE) is one of nature's fastest enzymes, despite the fact that its three-dimensional structure reveals its active site to be deeply sequestered within the molecule. This raises questions with respect to traffic of substrate to, and products from, the active site, which may be investigated by time-resolved crystallography. In order to address one aspect of the feasibility of performing time-resolved studies on AChE, a data set has been collected using the Laue technique on a trigonal crystal of Torpedo californica AChE soaked with the reversible inhibitor edrophonium, using a total X-ray exposure time of 24 ms. Electron-density maps obtained from the Laue data, which are of surprisingly good quality compared with similar maps from monochromatic data, show essentially the same features. They clearly reveal the bound ligand, as well as a structural change in the conformation of the active-site Ser200 induced upon binding.

PubMed: 10089512
DOI: 10.1107/S0907444998005277

Experimental method

X-RAY DIFFRACTION (2.8 Å)