Native triple-helical collagen (Collagen)

Native triple-helical collagen is the fundamental structural protein of the extracellular matrix (ECM) in vertebrates, comprising approximately 25% to 35% of the total protein content in the human body [1, 3]. It is characterized by a unique supersecondary structure known as the collagen triple helix, which consists of three polypeptide alpha-chains wound around each other in a right-handed manner [1, 4]. This structure is stabilized by a repeating Gly-X-Y amino acid sequence, where X and Y are frequently proline and hydroxyproline, respectively [5, 8]. Collagen provides essential mechanical strength and structural integrity to tissues such as skin, bone, tendons, and cartilage, while also acting as a bioactive scaffold that regulates cell adhesion, migration, and differentiation through interactions with receptors like integrins and discoidin domain receptors (DDRs) [2, 5]. Dysregulation of collagen synthesis, cross-linking, or degradation is central to the pathogenesis of numerous diseases, including systemic fibrosis, osteogenesis imperfecta, and cancer metastasis [1, 3, 10]. Therapeutic strategies targeting native collagen include the use of collagenases for enzymatic debridement of wounds or treatment of contractures, as well as the development of inhibitors targeting collagen-modifying enzymes like lysyl oxidase (LOX) to treat fibrotic conditions [7, 9, 12]. Furthermore, the distinction between native and denatured collagen is a critical diagnostic marker, as the unfolding of the triple helix often signifies tissue damage or active remodeling in pathological states [12, 14].

Other names

TropocollagenFibrillar collagenType I collagenType II collagenType III collagenType IV collagenSoluble collagen

Enzymatic degradation of the triple helix, inhibition of collagen synthesis, inhibition of lysyl oxidase-mediated cross-linking, and blocking of collagen-receptor interactions.