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; membrane; mitochondrion; integral to plasma membrane; melanosome; plasma membrane; sarcolemma; lipid raft; acrosomal membrane
Molecular Function: mannose binding; protein binding
Biological Process: response to peptide hormone stimulus; extracellular matrix organization and biogenesis; response to cAMP; decidualization; odontogenesis of dentine-containing teeth; response to mercury ion; extracellular matrix disassembly; cellular metabolic process; cell surface receptor linked signal transduction; pyruvate metabolic process; blood coagulation; leukocyte migration; embryo implantation
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.