Compositions and methods for treating lysosomal storage diseases are disclosed. Biotherapeutic complexes containing an internalization effector binding domain and a lysosomal replacement enzyme activity are disclosed. The biotherapeutic complexes are capable of entering cells, segregating to the lysosome, and delivering the replacement enzyme activity to the lysosome.

Compositions and methods for treating lysosomal storage diseases are disclosed. Biotherapeutic complexes containing an internalization effector binding domain and a lysosomal replacement enzyme activity are disclosed. The biotherapeutic complexes are capable of entering cells, segregating to the lysosome, and delivering the replacement enzyme activity to the lysosome.