This gene encodes a member of the peptidase S9B family, a small family of dipeptidyl peptidases that are able to cleave peptide substrates at a prolyl bond. The encoded protein shares similarity with dipeptidyl peptidase-4 in that it is ubiquitously expressed, and hydrolyzes the same substrates. These similarities suggest that, like dipeptidyl peptidase IV, this protein may play a role in T-cell activation and immune function. Alternatively spliced transcript variants encoding different isoforms have been described.[6] A relatively specific inhibitor of DPP8 and DPP9, Val-boroPro [7]-,[8] leads to increased activation of the inflammasome though both NLRBP1 and CARD8 and can trigger pyroptosis.[9]
Ajami K, Abbott CA, Obradovic M, et al. (2003). "Structural requirements for catalysis, expression, and dimerization in the CD26/DPIV gene family". Biochemistry. 42 (3): 694–701. doi:10.1021/bi026846s. PMID12534281.
Chen YS, Chien CH, Goparaju CM, et al. (2004). "Purification and characterization of human prolyl dipeptidase DPP8 in Sf9 insect cells". Protein Expr. Purif. 35 (1): 142–6. doi:10.1016/j.pep.2003.12.019. PMID15039077.
Jiaang WT, Chen YS, Hsu T, et al. (2005). "Novel isoindoline compounds for potent and selective inhibition of prolyl dipeptidase DPP8". Bioorg. Med. Chem. Lett. 15 (3): 687–91. doi:10.1016/j.bmcl.2004.11.023. PMID15664838.
Ogasawara W, Tanaka C, Suzuki M, et al. (2005). "Isoforms of dipeptidyl aminopeptidase IV from Pseudomonas sp. WO24: role of the signal sequence and overexpression in Escherichia coli". Protein Expr. Purif. 41 (2): 241–51. doi:10.1016/j.pep.2004.10.027. PMID15866709.
Yu DM, Wang XM, Ajami K, et al. (2006). "DP8 and DP9 have Extra-Enzymatic Roles in Cell Adhesion, Migration and Apoptosis". Dipeptidyl Aminopeptidases. Advances in Experimental Medicine and Biology. Vol. 575. pp. 63–72. doi:10.1007/0-387-32824-6_7. ISBN978-0-387-29058-4. PMID16700509.
