PrpF is a protein found in the 2-methylcitrate pathway. It is structurally similar to DAP epimerase and proline racemase. This protein is likely to acts to isomerise trans-aconitate to cis-aconitate [1].

1: The three-dimensional crystal structure of the PrpF protein of Shewanella oneidensis complexed with trans-aconitate: insights into its biological function. Garvey GS, Rocco CJ, Escalante-Semerena JC, Rayment I; Protein Sci. 2007;16:1274-1284. PMID:17567742