Human Mannose Receptor C Type 2 (MRC2) Protein

Background

Mannose receptor C-type 2 (MRC2), also known as endocytic mannose receptor or uPARAP/Endo180, is a transmembrane glycoprotein receptor and a member of the C-type lectin family. MRC2 plays a significant role in the cellular processes of endocytosis and extracellular matrix (ECM) remodeling, particularly through binding and internalizing glycoproteins and matrix components. MRC2 is predominantly expressed in cells with endocytic functions, including fibroblasts, macrophages, and endothelial cells, and contributes to tissue homeostasis, immune response, and wound healing by modulating cellular uptake of glycosylated and collagenous materials. MRC2 is one of several mannose receptors, structurally distinct from others such as MRC1. Unlike MRC1, which is primarily involved in antigen capture and immune surveillance, MRC2 is most notable for its role in collagen uptake and degradation, positioning it as a unique player in matrix remodeling and turnover. The receptor's collagen-binding capacity has been linked to its role in tumor progression and metastasis in cancer as well as in fibrosis, where excessive ECM accumulation disrupts normal tissue function.