Phospholipase A2 - Manual

Source:
Crotalus adamanteus Venom
CAS:
9001-84-7
EC:
3.1.1.4

Phospholipase A2 represents a class of heat-stable, calcium-dependent enzymes catalyzing the hydrolysis of the 2-acyl bond of 3-n-phosphoglycerides. This enzyme is named Phospholipase A2 to denote its 2-acyl specificity (Uthe 1971).

Phospholipase A2 Formula

Phospholipase A2 has been isolated from pancreas, snake and bee venoms. Forst et al. (1986), Chan et al. (1982), Coulard et al. (1987) and Horigome et al. (1987) report on platelet phospholipase A2. The primary structure of human pancreatic PLA2 has been reported by Verheij et al. (1983).

Phospholipases are involved in lipid metabolism and are important probes of structure-function relationships in biological membranes. Dawson 1973). 

Specificity

The enzyme specifically catalyzes the hydrolysis of the β-fatty ester linkage of L-α phosphoglycerides (Van Deenen 1963).

Composition

Two proteins (A2-α, A2-β) exhibiting Phospholipase A activity have been isolated from Crotalus adamanteus (Saito and Hanahan 1962, and Wells and Hanahan 1969). Each protein is composed of dimeric subunits (Wells 1971). The two proteins have similar activities but are chromatographically and electrophoretically distinct. Heinrikson et al. (1977) report on the distinctive structural features of the two enzymes and the complete amino acid sequence of phospholipase A2-α. The two subunits differ at a single amino acid; A2-α contains glutamine at residue 117, while the more acidic A2-β contains glutamic acid at this residue. 

Characteristics of Phospholipase A2
Protein Accession Number

P00623

Molecular weight: 30,000 (Wells 1969)

Extinction coefficientextinction coefficient = 22.7 (Wells 1969)

Isoelectric point

4.55 and 4.40 for A-α and A-β, respectively (Saito 1962)

Activators

Calcium ion (Dennis 1973)

Inhibitors

Zinc, barium, and manganese ions (Golec et al. 1992, and Uthe 1971)

Phospholipase A2 Products

Description
Activity
Code
Cat. #
Size
Price
Description
Phospholipase A2
Source:
Crotalus adamanteus Venom
A chromatographically purified, dialyzed, lyophilized powder.
Store at 2-8°C.
Activity
≥200 units per mg dry weight
Code
PLA
LS005660
1 mg
$76.00
LS005662
Bulk
---
The minimum amount for bulk packaging/pricing for this product is 20 x 1 mg. Please contact custservice@worthington-biochem.com to request a quote for smaller amounts.