Identification of a novel class of farnesylation targets by structure-based modeling of binding specificity

Nir London, Corissa L. Lamphear, James L. Hougland, Carol A. Fierke, Ora Schueler-Furman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

50 Scopus citations


Farnesylation is an important post-translational modification catalyzed by farnesyltransferase (FTase). Until recently it was believed that a C-terminal CaaX motif is required for farnesylation, but recent experiments have revealed larger substrate diversity. In this study, we propose a general structural modeling scheme to account for peptide binding specificity and recapitulate the experimentally derived selectivity profile of FTase in vitro. In addition to highly accurate recovery of known FTase targets, we also identify a range of novel potential targets in the human genome, including a new substrate class with an acidic C-terminal residue (CxxD/E). In vitro experiments verified farnesylation of 26/29 tested peptides, including both novel human targets, as well as peptides predicted to tightly bind FTase. This study extends the putative range of biological farnesylation substrates. Moreover, it suggests that the ability of a peptide to bind FTase is a main determinant for the farnesylation reaction. Finally, simple adaptation of our approach can contribute to more accurate and complete elucidation of peptide-mediated interactions and modifications in the cell.

Original languageAmerican English
Article numbere1002170
JournalPLoS Computational Biology
Issue number10
StatePublished - Oct 2011


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