LRP5（LDL receptor related protein 5），癌症关联基因，基因ID：4041，该基因编码一种跨膜低密度脂蛋白受体，在受体介导的内吞过程中结合并内化配体。该蛋白还作为一种与卷曲蛋白家族成员的共受体，用于wnt蛋白的信号转导，最初是根据其与人类1型糖尿病的关系克隆的。这种蛋白在骨骼稳态中起着关键作用，许多与骨密度相关的疾病都是由这种基因突变引起的。该基因突变也可引起家族性渗出性玻璃体视网膜病变。选择性剪接导致多个转录变体[由RefSeq提供，2014年5月]This gene encodes a transmembrane low-density lipoprotein receptor that binds and internalizes ligands in the process of receptor-mediated endocytosis. This protein also acts as a co-receptor with Frizzled protein family members for transducing signals by Wnt proteins and was originally cloned on the basis of its association with type 1 diabetes mellitus in humans. This protein plays a key role in skeletal homeostasis and many bone density related diseases are caused by mutations in this gene. Mutations in this gene also cause familial exudative vitreoretinopathy. Alternative splicing results in multiple transcript variants. [provided by RefSeq， May 2014]。