Recombinant Human Asialoglycoprotein Receptor 1/HL-1

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

The Asialoglycoprotein Receptor 1 (ASGR1) also known as ASGPR 1 or asialoglycoprotein receptor is a well-known protein with a critical role in the mechanism of recognizing and binding to asialoglycoproteins. It has a molecular mass of approximately 46 kDa. ASGR1 is expressed mostly in liver cells specifically hepatocytes. The unique characteristic of this receptor is its lectin-like nature which allows it to bind to specific sugar moieties present on desialylated glycoproteins. Through receptor-mediated endocytosis it facilitates their removal from the bloodstream.

Biological function summary

The function of ASGR1 extends significantly. It operates as part of the asialoglycoprotein receptor complex interfacing directly with the ligand proteins to mediate endocytosis. This process is essential in most mammalian systems for maintaining serum glycoprotein homeostasis. By clearing desialylated glycoproteins from circulation ASGR1 helps prevent potential adverse effects these molecules might cause like immune activation or interference with other biological functions.

Pathways

ASGR1 is integral to glycoprotein clearance pathways. It actively participates in the hepatic clearance pathway ensuring the regulation of serum glycoprotein levels. The removal of asialoglycoproteins involves interactions with several other hepatic proteins such as GalNAc transferase which can further facilitate the remodeling of glycoconjugates. Understanding these interactions is key for comprehending how the liver maintains overall metabolic balance.

ASGR1 is linked to certain liver-related conditions. Dysfunction or aberrant expression of the ASGR1 receptor can relate to elevated levels of serum glycoproteins which might be observed in liver cirrhosis. Elevated glycoproteins can exacerbate the progression of liver diseases. Furthermore ASGR1 protein interaction with viral glycoproteins has implications in hepatitis infections where it may inadvertently facilitate viral entry into hepatocytes affecting liver function and contributing to disease pathology.