ISDA

Entry Detail

PDB ID:

2ACE

Keywords:

SERINE HYDROLASE

Title:

NATIVE ACETYLCHOLINESTERASE (E.C. 3.1.1.7) FROM TORPEDO CALIFORNICA

Biological Source:

Source Organism:

Torpedo californica

PDB Version:

Deposition Date:

1996-06-23

Release Date:

1996-11-08

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.50 Å

R-Value Free:

0.25

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 31 2 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:ACETYLCHOLINESTERASE
Chain IDs:A
Chain Length:537
Number of Molecules:1
Biological Source:Torpedo californica

UniProt ID:P04058 Pfam ID:PF00135 EC:3.1.1.7

Ligand Molecules

ACH

Primary Citation

Structure of acetylcholinesterase complexed with the nootropic alkaloid, (-)-huperzine A.

Raves, M.L, Harel, M, Pang, Y.-P, Silman, I, Kozikowski, A.P, Sussman, J.L, Bucht, G, Hjalmarsson, K, Axelsen, P.H, Harel, M, Silman, I, Sussman, J.L, Harel, M, Schalk, I, Ehret-Sabatier, L, Bouet, F, Goeldner, M, Hirth, C, Axelsen, P.H, Silman, I, Sussman, J.L, Sussman, J.L, Harel, M, Frolow, F, Oefner, C, Goldman, A, Toker, L, Silman, I, Sussman, J.L, Harel, M, Frolow, F, Varon, L, Toker, L, Futerman, A.H, Silman, I, Schumacher, M, Camp, S, Maulet, Y, Newton, M, Macphee-Quigley, K, Taylor, S.S, Friedmann, T, Taylor, P.Show

Nat.Struct.Biol. 4 57 63 (1997)

PMID: 8989325 DOI: 10.1038/nsb0197-57

Abstact

(-)-Huperzine A (HupA) is found in an extract from a club moss that has been used for centuries in Chinese folk medicine. Its action has been attributed to its ability to strongly inhibit acetylcholinesterase (AChE). The crystal structure of the complex of AChE with optically pure HupA at 2.5 A resolution shows an unexpected orientation for the inhibitor with surprisingly few strong direct interactions with protein residues to explain its high affinity. This structure is compared to the native structure of AChE devoid of any inhibitor as determined to the same resolution. An analysis of the affinities of structural analogues of HupA, correlated with their interactions with the protein, shows the importance of individual hydrophobic interactions between HupA and aromatic residues in the active-site gorge of AChE.

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Primary Citation of related structures