1jjb

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A neutral molecule in cation-binding site: Specific binding of PEG-SH to Acetylcholinesterase from Torpedo californica

Structural highlights

1jjb is a 1 chain structure with sequence from Tetronarce californica. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:X-ray diffraction, Resolution 2.3Å
Ligands:NAG, PE7
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

ACES_TETCF Terminates signal transduction at the neuromuscular junction by rapid hydrolysis of the acetylcholine released into the synaptic cleft. May be involved in cell-cell interactions.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The crystal structure of acetylcholinesterase from Torpedo californica complexed with the uncharged inhibitor, PEG-SH-350 (containing mainly heptameric polyethylene glycol with a terminal thiol group) is determined at 2.3 A resolution. This is an untypical acetylcholinesterase inhibitor, since it lacks the cationic moiety typical of the substrate (acetylcholine). In the crystal structure, the elongated ligand extends along the whole of the deep and narrow active-site gorge, with the terminal thiol group bound near the bottom, close to the catalytic site. Unexpectedly, the cation-binding site (formed by the faces of aromatic side-chains) is occupied by CH(2) groups of the inhibitor, which are engaged in C-H...pi interactions that structurally mimic the cation-pi interactions made by the choline moiety of acetylcholine. In addition, the PEG-SH molecule makes numerous other weak but specific interactions of the C-H...O and C-H...pi types.

A neutral molecule in a cation-binding site: specific binding of a PEG-SH to acetylcholinesterase from Torpedo californica.,Koellner G, Steiner T, Millard CB, Silman I, Sussman JL J Mol Biol. 2002 Jul 19;320(4):721-5. PMID:12095250[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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Citations
2 reviews cite this structure
Cholinesterases, a target of pharmacology and toxicology.
Pohanka et al. (2011)
1 more
15 other articles
No citations found

See Also

References

  1. ↑ Koellner G, Steiner T, Millard CB, Silman I, Sussman JL. A neutral molecule in a cation-binding site: specific binding of a PEG-SH to acetylcholinesterase from Torpedo californica. J Mol Biol. 2002 Jul 19;320(4):721-5. PMID:12095250

Contents


PDB ID 1jjb

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OCA

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