This is the community wiki page for the gene smpx please feel free to add any information that is relevant to this gene that is not already captured elsewhere in Xenbase.
summary from NCBI
In Humans: This gene encodes a small protein that has no known functional domains. Mutations in this gene are a cause of X-linked deafness-4, and the encoded protein may play a role in the maintenance of inner ear cells subjected to mechanical stress. Alternatively spliced transcript variants have been observed for this gene. [provided by RefSeq, Dec 2011]
05.08.2018 Human name has changed for Entrez Gene: 23676. From small muscle protein, X-linked to small muscle protein X-linked