What does pectate lyase do?

What does pectate lyase do?

Pectate lyase (EC 4.2. 2.2) is an enzyme involved in the maceration and soft rotting of plant tissue. Pectate lyase is responsible for the eliminative cleavage of pectate, yielding oligosaccharides with 4-deoxy-α-D-mann-4-enuronosyl groups at their non-reducing ends.

Where is pectate lyase found?

Pectate lyases are also commonly produced in the bacterial world, either by bacteria living in close proximity with plants or by gut bacteria that find plant material in the digestive tract of their hosts.

What is the meaning of Pectate?

: a salt or ester of a pectic acid.

What is middle lamella made of?

The middle lamella is made up of calcium and magnesium pectates. In a mature plant cell it is the outermost layer of cell wall.

Which ions are more in middle lamella?

The middle lamella is a layer rich in pectins which cement the cell walls of adjacent plant cells and forms plasmodesmata (channels for communication between cells).

What are the four types of pectic substances?

There are four main types of pectic substances: (1) Protopectins, the water insoluble pectic substances which are restrictedly hydrolyzed to yield pectins or pectic acids; (2) Pectic acids/pectates, the water soluble polygalacturonans with negligible amount of methoxyl groups; (3) Pectinic acids/pectinates, the …

What is pectin made of?

Pectin is a complex mixture of polysaccharide composed of a galacturonan backbone of which variable proportions can be methyl-esterified and is usually obtained from citrus fruit and apple.

What foods contain lignin?

Lignin content is highest in fruits, particularly strawberries and peaches, whereas pectin levels are highest in citrus fruits and apples. Cereals and grains contain high levels of the insoluble fibers cellulose and hemicelluloses (Lanza and Butrum, 1986; Selvendran, 1984).