Plays pivotal roles in spermatogenesis, embryo implantation, neural network formation and tumor progression. Stimulates adjacent fibroblasts to produce matrix metalloproteinases (MMPS). May target monocarboxylate transporters SLC16A1, SLC16A3 and SLC16A8 to plasma membranes of retinal pigment epithelium and neural retina. Seems to be a receptor for oligomannosidic glycans. In vitro, promotes outgrowth of astrocytic processes. Enriched on the surface of tumor cells. Up-regulated in gliomas. Its expression levels correlate with malignant potential of the tumor. Forms homooligomers in a cis-dependent manner on the plasma membrane. Forms a complex with MMP1 at the tumor cell surface. Interacts with SLC16A1 and SLC1A3; probably a BSG dimer is associated with a monocarboxylate transporter dimer. Interacts with ATP1B2, MAG and L1CAM. Interacts with AJAP1. 2 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Membrane protein, integral; Immunoglobulin superfamily
Cellular Component: Golgi membrane; mitochondrion; membrane; integral to plasma membrane; melanosome; plasma membrane; sarcolemma; acrosomal membrane; lipid raft
Molecular Function: mannose binding; protein binding
Biological Process: response to mercury ion; cellular metabolic process; extracellular matrix disassembly; response to peptide hormone stimulus; extracellular matrix organization and biogenesis; cell surface receptor linked signal transduction; response to cAMP; decidualization; blood coagulation; pyruvate metabolic process; leukocyte migration; embryo implantation; odontogenesis of dentine-containing teeth
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.