This disclosure encompasses the edr3 polynucleotide, polypeptides encoded by the edr3 gene and fragments thereof. This disclosure also encompasses homologues of the edr3 gene from mammals, in particular from humans. In addition, this disclosure encompasses the use of edr3 polynucleotides, edr3 proteins and polypeptides, and antibodies to the edr3 protein capable of increasing or decreasing edr3 activity or expression.