S100PBPR is a family of proteins found in eukaryotes, and localised to cell nuclei where S100P is also present, and the two proteins co-immunoprecipitate. S100P is a member of the S100 family of calcium-binding proteins and there have been several recent reports of its over-expression in pancreatic ductal adenocarcinoma. In situ hybridisation shows S100PBPR transcripts to be found in islet cells but not duct cells of the healthy pancreas. An interaction between S100P and S100PBPR may be involved in early pancreatic cancer.

1: Expression of S100P and its novel binding partner S100PBPR in early pancreatic cancer. Dowen SE, Crnogorac-Jurcevic T, Gangeswaran R, Hansen M, Eloranta JJ, Bhakta V, Brentnall TA, Luttges J, Kloppel G, Lemoine NR; Am J Pathol. 2005;166:81-92. PMID:15632002

2: Transition from non-motile behaviour to directed migration during early PGC development in zebrafish. Blaser H, Eisenbeiss S, Neumann M, Reichman-Fried M, Thisse B, Thisse C, Raz E; J Cell Sci. 2005;118:4027-4038. PMID:16129886

3: Usefulness of S100P in diagnosis of adenocarcinoma of pancreas on fine-needle aspiration biopsy specimens. Deng H, Shi J, Wilkerson M, Meschter S, Dupree W, Lin F; Am J Clin Pathol. 2008;129:81-88. PMID:18089492