Sperm Protein 17 Antibodies (SP17A) ELISA Kit for Cat

SPACA3: a single-pass type II sperm surface membrane protein that may be involved in sperm-egg plasma membrane adhesion and fusion during fertilization. It could be a potential receptor for the egg oligosaccharide residue N-acetylglucosamine, which is present in the extracellular matrix over the egg plasma membrane. A member of the Cancer-Testis Antigen (CTA) superfamily. CTAs may play roles in embryonal development and tumor transformation or aspects of tumor progression. CTAs were once thought to be silenced in most normal adult tissues, with limited expression in fetal, placental, testis, and ovarian cells. These proteins are now known to be aberrantly expressed in various cancers and many are capable of eliciting humoral and cellular immune responses. Expressed in testis, epididymis and placenta. Although it belongs to the glycosyl hydrolase 22 family, T122 and N139 are present instead of the conserved Glu and Asp which are active site residues. It is therefore expected that this protein lacks hydrolase activity. Two isoforms of the human protein are produced by alternative splicing. Note: This description may include information from RefSeq and UniProtKB

Protein type: Cancer Testis Antigen (CTA); Membrane protein, integral

Chromosomal Location of Human Ortholog: 17q11.2

Cellular Component: lysosome; extracellular region; integral to membrane; secretory granule; acrosomal membrane

Molecular Function: protein binding; lysozyme activity

Biological Process: sperm-egg recognition; defense response to Gram-positive bacterium; monocyte activation; response to virus; positive regulation of phagocytosis; cell wall catabolic process; peptidoglycan catabolic process; positive regulation of macrophage activation