MSX1 have roles in limb-pattern formation, there is also strong evidence from sequencing studies and mutation in this gene.
This gene encodes a member of the muscle segment homeobox gene family. It may also have roles in limb-pattern formation, craniofacial development, in particular, odontogenesis, and tumor growth inhibition. There is also strong evidence from sequencing studies of candidate genes involved in clefting that mutations in the MSX1 gene may be associated in the pathogenesis of cleft lip and palate. 
