Abstract: The present disclosure provides a modified AAV capsid protein comprising a targeting peptide, optionally further comprising a liver-toggle mutation. The modified AAV capsid protein can form an rAAV, which has a preferred tropism, specificity or biodistribution in vivo or in vitro. The rAAV of the present disclosure can be used for gene therapies targeted at a specific tissue. The present disclosure also provides rAAV compositions comprising MTM1 coding sequences and their use to treat subjects suffering from X-linked myotubular myopathy (XLMTM).