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Sampaper_29_Mar.pdf (623.26 kB)

An open-access tool for designing drug control into engineered proteins

preprint
submitted on 06.04.2018 and posted on 06.04.2018 by Sam M Ireland, Christopher Southan, Alazane Dominguez-Monedero, Simon D. Harding, Joanna L. Sharman, Jamie A. Davies

A major challenge in synthetic biology, particularly for mammalian systems, is inclusion of adequate external control for the synthetic system activities. Control at the transcriptional level can be achieved by adaptation of bacterial repressor-operator systems (e.g. TetR), but altering the activity of a protein by controlling transcription is indirect and for longer half-life mRNAs, decreasing activity this way can be inconveniently slow. Where possible, direct modulation of protein activity by soluble ligands has many advantages, including rapid action. Decades of drug discovery and pharmacological research have uncovered detailed information on the interactions between large numbers of small molecules and their primary protein targets (as well as off-target secondary interactions), many of which have been well studied in mammals, including humans. In principle, this accumulated knowledge would be a powerful resource for synthetic biology. Here we present SynPharm, a tool that draws together information from the pharmacological database GtoPdb and the structural database, PDB, to help synthetic biologists identify ligand-binding domains of natural proteins. Consequently, as sequence cassettes, these may be suitable for building into engineered proteins to confer small molecule modulation on them. The tool has ancillary utilities which include; assessing contact changes between different ligands in the same protein, predicting possible effects of genetic variants on binding residues and insights into ligand cross-reactivity between species.

Funding

Wellcome Trust and BBSRC

History

Email Address of Submitting Author

cdsouthan@gmail.com

Institution

University of Edinburgh, Center for Brain Sciences

Country

UK

ORCID For Submitting Author

0000-0001-9580-0446

Declaration of Conflict of Interest

No conflict of interest

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