Abstract
Collagen, a predominant structural protein in extracellular matrix (ECM), is now considered to have probable roles in many biological activities and hence, in different forms have found application as nutraceutical or pharmaceutical therapy option. Many of the biological properties are believed to be due to small hidden peptide residues in the collagen molecules, which come into play after the biodegradation or biosorption of the parent molecule. These peptide regions are called cryptic peptides or by some, as cryptides. The proteolytic hydrolysis of the ECM protein releases the cryptic peptides with many novel biological activities not exhibited directly by the parental protein which include angiogenic, antimicrobial, mitogenic and chemotactic properties. The research for understanding the role of these cryptic peptide regions and making use of them in medical field is very active. Such an understanding could lead to the development of peptide supplements for many biomedical applications. The prolific research in this area is reviewed in this paper.
Keywords: Collagen peptides, cryptic peptides, ECM peptides, bioactive peptides.
Graphical Abstract
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