該基因編碼的蛋白是蛋白酪氨酸磷酸酶（PTP）家族的成員。眾所周知，PTP是調節多種細胞過程的信號分子，包括細胞生長、分化、有絲分裂周期和致癌轉化。該PTP包含一個胞外結構域、一個跨膜段和一個胞質內催化結構域，因此屬于受體型PTP。該PTP的細胞外區由多個纖維連接蛋白Ⅲ型重復序列組成，該重復序列與神經受體和細胞粘附分子（如contactin和tenasin c）相互作用。該蛋白也與鈉通道相互作用，因此可以通過改變酪氨酸磷酸化狀態來調節鈉通道。這種蛋白的相互作用伙伴的功能與PTP在細胞粘附、神經突生長和神經元分化中的作用有關。已發現該基因編碼不同亞型的替代轉錄變體。
The protein encoded by this gene is a member of the protein tyrosine phosphatase (PTP) family. PTPs are known to be signaling molecules that regulate a variety of cellular processes including cell growth, differentiation, mitotic cycle, and oncogenic transformation. This PTP contains an extracellular domain, a single transmembrane segment and one intracytoplasmic catalytic domain, thus belongs to receptor type PTP. The extracellular region of this PTP is composed of multiple fibronectin type_III repeats, which was shown to interact with neuronal receptor and cell adhesion molecules, such as contactin and tenascin C. This protein was also found to interact with sodium channels, and thus may regulate sodium channels by altering tyrosine phosphorylation status. The functions of the interaction partners of this protein implicate the roles of this PTP in cell adhesion, neurite growth, and neuronal differentiation. Alternate transcript variants encoding different isoforms have been found for this gene.