該基因編碼受體型蛋白酪氨酸磷酸酶R3亞型家族的一個成員。這些蛋白定位于極化細胞的頂端表面，通過激活src家族激酶可能具有組織特異性功能。該基因包含兩個不同的啟動子，并且已經觀察到編碼多個亞型的選擇性剪接轉錄變體。編碼蛋白可能具有多種亞型特異性和組織特異性功能，包括調節破骨細胞的產生和活性，抑制細胞增殖和促進細胞凋亡。該基因是一種候選的抑癌基因，在幾種癌癥中已觀察到該基因的表達降低。
This gene encodes a member of the R3 subtype family of receptor-type protein tyrosine phosphatases. These proteins are localized to the apical surface of polarized cells and may have tissue-specific functions through activation of Src family kinases. This gene contains two distinct promoters, and alternatively spliced transcript variants encoding multiple isoforms have been observed. The encoded proteins may have multiple isoform-specific and tissue-specific functions, including the regulation of osteoclast production and activity, inhibition of cell proliferation and facilitation of apoptosis. This gene is a candidate tumor suppressor, and decreased expression of this gene has been observed in several types of cancer.