Pectinolytic lyases: a comprehensive review of sources, category, property, structure, and catalytic mechanism of pectate lyases and pectin lyases

Bioresources and Bioprocessing

Table 1 Classification of pectinases

Enzyme			E.C. no	Substrate	Reaction type	Products
PE	PME		EC3.1.1.11	Pectin	Deesterification	Pectic acid + methanol
PE	PAE		EC3.1.1.6	Pectin	Deesterification	Pectic acid methanol
Depolymerases	Hydrolases	Endo-PG	EC3.2.1.15	Pectic acid	Hydrolysis	Oligogalacturonates
		Exo-PG1	EC3.2.1.67	Pectic acid	Hydrolysis	Monogalacturonates
		Exo-PG2	EC3.2.1.82	Pectic acid	Hydrolysis	Digalacturonates
	Lyase	Endo-PGL	EC4.2.2.2	Pectic acid	Trans-elimination	Unsaturated oligogalacturonates
		Exo-PGL	EC4.2.2.9	Pectic acid	Trans-elimination	Unsaturated digalacturonates
		Endo-PMGL	EC4.2.2.10	Pectin	Trans-elimination	Unsaturated methyloligogalacturonates
PPase			–	Protopectin	Hydrolysis	Pectin

PE pectin esterase, PME pectin methyl esterase, PAE pectin acetyl esterase, PG polygalacturonase, PGL polygalacturonate lyase, PMGL polymethylgalacturonate lyase, PPase protopectinase