SEMA3A（semaphorin 3A），癌症关联基因，基因ID：10371，该基因是信号蛋白家族的一员，编码一个具有ig样c2型（免疫球蛋白样）结构域、psi结构域和sema结构域的蛋白质。这种分泌蛋白既可以作为化学排斥剂，抑制轴突生长，也可以作为化学吸引剂，刺激根尖树突的生长。在这两种情况下，蛋白质对正常的神经元模式发展至关重要。这种蛋白的表达增加与精神分裂症有关，见于多种人类肿瘤细胞系中。此外，这种蛋白的异常释放与阿尔茨海默病的进展有关。[由RefSeq提供，2008年7月]This gene is a member of the semaphorin family and encodes a protein with an Ig-like C2-type (immunoglobulin-like) domain， a PSI domain and a Sema domain. This secreted protein can function as either a chemorepulsive agent， inhibiting axonal outgrowth， or as a chemoattractive agent， stimulating the growth of apical dendrites. In both cases， the protein is vital for normal neuronal pattern development. Increased expression of this protein is associated with schizophrenia and is seen in a variety of human tumor cell lines. Also， aberrant release of this protein is associated with the progression of Alzheimer's disease. [provided by RefSeq， Jul 2008]。