C3389 Sigma

Acetylcholinesterase from Electrophorus electricus (electric eel)

Type VI-S, lyophilized powder, 200-1,000 units/mg protein

DOWNLOAD MSDS (PDF)

Synonym: AChE, Acetylcholine acetylhydrolase, Cholinesterase, Acetyl

Properties

Related Categories 3.1.x.x Acting on esters, 3.x.x.x Hydrolases, Biochemicals and Reagents, Enzyme Class Index, Enzymes, Inhibitors, and Substrates,
type   Type VI-S
form   lyophilized powder
composition   Protein, ≥60% biuret
storage temp.   −20°C

Description

Analysis Note

The activity obtained using acetylcholine as substrate is 30-100 times that obtained with butyrylcholine, using acetylcholinesterase from electric eel.

Biochem/physiol Actions

Major degradative enzyme for acetylcholine in vivo. Converts acetylcholine + H2O to choline + acetic acid.

Unit Definition

One unit will hydrolyze 1.0 μmole of acetylcholine to choline and acetate per min at pH 8.0 at 37 °C.

Physical form

Lyophilized powder containing Tris buffer salts

General description

Molecular Weight: 280 kDa
Isoelectric Point: 5.5
Extinction Coefficient: E1% = 18.0 (280 nm)

Acetylcholinesterase from Electrophorus electricus is a tetramer composed of 4 equal subunits of 70 kDa each. Each subunit contains one active site. The enzyme is a glycoprotein containing hexosamines.

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