CYR61

CYR61 (CCN1)

Diagram of the CCN1 protein structure

CYR61, also known as CCN1, is a matricellular protein that plays a crucial role in cell signaling, development, and repair processes. It is a member of the CCN family of proteins, which are involved in various cellular functions including cell adhesion, migration, proliferation, and differentiation.

Structure

CYR61 is characterized by its modular structure, which includes several distinct domains that contribute to its diverse biological functions. The protein consists of the following domains:

• An insulin-like growth factor binding protein (IGFBP) domain
• A von Willebrand factor type C (vWC) domain
• A thrombospondin type 1 (TSP1) repeat
• A cysteine knot (CT) domain

These domains allow CYR61 to interact with a variety of cell surface receptors, extracellular matrix components, and growth factors.

Function

CYR61 is involved in numerous physiological processes, including:

• Angiogenesis: CYR61 promotes the formation of new blood vessels by stimulating endothelial cell proliferation and migration.
• Wound healing: It plays a role in tissue repair by modulating the activity of fibroblasts and other cell types involved in the healing process.
• Development: CYR61 is essential for normal embryonic development, particularly in the formation of the cardiovascular system and skeletal system.

Clinical Significance

Alterations in CYR61 expression have been associated with various pathological conditions, including:

• Cancer: Overexpression of CYR61 has been observed in several types of cancer, where it may contribute to tumor growth and metastasis.
• Fibrosis: Dysregulation of CYR61 is implicated in fibrotic diseases, where excessive tissue scarring occurs.
• Inflammation: CYR61 can modulate inflammatory responses, influencing the progression of inflammatory diseases.

Related Pages

• CCN family
• Matricellular proteins
• Cell signaling
• Extracellular matrix