Recombinant Proteins
Product List
SRGN Human
Serglycin Human Recombinant
SRGN is fused to a 25 amino acid His-tag at N-terminus & purified by proprietary chromatographic techniques.
SRGN Human, HEK
Serglycin Human Recombinant, HEK
Introduction
Serglycin, also known as hematopoietic proteoglycan core protein or secretory granule proteoglycan core protein, is a proteoglycan primarily expressed in hematopoietic cells and endothelial cells . It is encoded by the SRGN gene and is the only known intracellular proteoglycan . Proteoglycans are complex macromolecules consisting of a core protein covalently linked with glycosaminoglycan (GAG) chains .
Key Biological Properties: Serglycin is unique in its ability to adopt highly divergent structures due to glycosylation with variable types of GAGs when expressed by different cell types . It is protease-resistant and rich in serine and glycine residues .
Expression Patterns and Tissue Distribution: Serglycin is predominantly expressed in hematopoietic cells, including mast cells, T lymphocytes, and macrophages . It is also found in endothelial cells and various non-hematopoietic cell types, including tumor cells .
Primary Biological Functions: Serglycin plays a crucial role in the storage and secretion of bioactive molecules within secretory granules and vesicles . It is involved in the formation of storage granules in immune cells and the retention of key inflammatory mediators .
Role in Immune Responses and Pathogen Recognition: Serglycin is essential for the proper functioning of immune cells, including the storage and release of proteases, chemokines, cytokines, and growth factors . It also plays a role in granule-mediated apoptosis by serving as a scaffold for granzymes and perforin .
Mechanisms with Other Molecules and Cells: Serglycin interacts with various molecules through its GAG chains or core protein . It binds to proteolytic enzymes, chemokines, cytokines, and growth factors, modulating their activities and protecting them from degradation .
Binding Partners and Downstream Signaling Cascades: Serglycin’s interactions with its binding partners can lead to the activation of downstream signaling pathways, such as Src-mediated focal adhesion turnover and cytoskeleton reorganization . These interactions facilitate processes like cell migration and immune responses .
Regulatory Mechanisms Controlling Expression and Activity: The expression of serglycin is regulated by various factors, including lipopolysaccharide (LPS) in macrophages, tumor necrosis factor (TNF) in endothelial cells, and interleukin 1β (IL-1β) in smooth muscle cells .
Transcriptional Regulation and Post-Translational Modifications: Serglycin undergoes dynamic regulation, including differences in the regulation of distinct sulfotransferases, which reflect temporal regulation important for the synthesis of granule components .
Biomedical Research: Serglycin is studied for its role in tumorigenesis, particularly in glioblastoma and non-small cell lung cancer . It is associated with poor survival in cancer patients and promotes malignant phenotypes through interactions with molecules like TGFβRI and CD44 .
Diagnostic Tools and Therapeutic Strategies: Due to its involvement in cancer progression and immune responses, serglycin is explored as a potential biomarker for cancer diagnosis and a target for therapeutic interventions .
Role Throughout the Life Cycle: Serglycin plays a significant role in various stages of the life cycle, from development to aging and disease. It is crucial for the proper functioning of the immune system and the regulation of inflammatory responses . In the context of disease, serglycin’s expression and activity are altered, contributing to conditions like cancer and chronic inflammation .
