Pathogenesis Related Proteins - A brief abridgment of types and functions.

Ever since the emergence of human civilization, plants hold an accountable value for the source of medicines, health products, pharmaceuticals, food supplements, cosmetics, etc. Many derivatives are used as an overriding compound for their antioxidant activity, anti-tumor activity, cytotoxic-activity, gene toxicity, anti-diabetics, hepato-protective, anti-diabetic, anti-lice activity, etc. as they are reported to contain a wide range of flavonoids, alkaloids, carbohydrates, fixed oils, tannins, and phenolic compounds, which are commonly used in folkloric medicine for the treatment of various diseases. On such an account plants are also known to produce a class of proteins called the Pathogenesis Related (PR) proteins against pathogen attack. These proteins play a determining role in plant defense against pathogens. Expression of PR genes can take place due to abiotic factors that cause stress such as oxidation stress, osmotic stress, wounding, and UV light. Their involvement in humans as allergens makes it salient for their exploration. The present review attempts to encompass the comprehensive literature analysis on the Pathogenesis related proteins concerning their importance owing to their pharmacological activities such as anti-microbial activity, antioxidant activity, and tumor resistant activities and their applications.