Detection of specific proteins using nanopores is currently challenging. To address this challenge, we developed a collection of over twenty nanopore-addressable protein tags engineered as reporters (NanoporeTERs, or NTERs). NTERs are constructed with a secretion tag, folded domain and a nanopore-targeting C-terminal tail in which arbitrary peptide barcodes can be encoded. We demonstrate simultaneous detection of up to nine NTERs expressed in bacterial or human cells using MinION nanopore sensor arrays.
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Data are available upon request and on can be found on github.com/uwmisl/NanoporeTERs.
Codes are available upon request and can be found on github.com/uwmisl/NanoporeTERs. Custom MinION MinKNOW runscripts can also be obtained from Oxford Nanopore Technologies upon request.
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We thank additional members of the Molecular Information Systems Lab for helpful discussion and feedback on this work. The OsmY expression plasmid was generously provided by C. Bryan and L. Carter (Institute for Protein Design, University of Washington). We also thank A. Heron and R. Gutierrez (Oxford Nanopore Technologies) for providing the configurable MinION run script and discussions on its use, and M. Jain (UCSC) for a custom Matlab script that facilitated visualization of the raw MinION data. This work was supported in part by NSF EAGER Award no. 1841188 and NSF CCF Award no. 2006864 to L.C. and J.N., an NIH/NCI Cancer Center Support Grant (no. P30 CA015704) Pilot Award and NSF Award 2021552 to J.N. and a sponsored research agreement from Oxford Nanopore Technologies.
A provisional patent has been filed by the University of Washington covering aspects of this work (Patent Application no. 17/283,007). K.S. is an employee of Microsoft. J.N. is a consultant to Oxford Nanopore Technologies. The remaining authors declare no competing interests.
Peer review information Nature Biotechnology thanks Yi-Tao Long, Meni Wanunu and the other, anonymous, reviewer(s) for their contribution to the peer review of this work.
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Cardozo, N., Zhang, K., Doroschak, K. et al. Multiplexed direct detection of barcoded protein reporters on a nanopore array. Nat Biotechnol 40, 42–46 (2022). https://doi.org/10.1038/s41587-021-01002-6
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