MTMR14Myotubularin related protein 14 also known as MTMR14 is a protein which in humans is encoded by the MTMR14 gene.FunctionExpression of Mtmr14 increased with myotubule formation and differentiation. MTMR14 is a phosphatidylinositol-3-phosphatase that dephosphorylates the same substrates as myotubularin, PtdInsP and PtdInsP2.Clinical significanceMutations in the MTMR14 gene are associated with myotubular myopathy.