BACKGROUNDVaccine development is one of the most promising fields in cancer research. After autologous transplantation, due to low tumour burden, patients are more likely to respond immunologically to a cancer vaccine. MUC1 with its adhesive and antiadhesive functions, immunostimulatory and immunosuppressive activities, is therefore a good candidate for breast cancer vaccine. A structure-based insight into the immunogenicity of natural MUC1 glycoforms, of its sub-domains, motifs and post translational modification like glycosylation and myriostoylation may aid the design of tumour vaccines.METHODSPrimary sequences of human MUC1 were retrieved from the SWISSPROT data bank. Protein pattern search: The primary sequence of Human MUC1 was searched at PROSITE (a dictionary of protein sites and patterns) database.RESULTSOur study observes that post-translational modifications play an important role in presenting MUC1 as a candidate for breast cancer vaccine.CONCLUSIONIt is found that the phosphrylation and glycosylation of important functional motifs of MUC1 may take part in the production of cytokines that may provide immunization.