Segmental Isotopic Labeling of Multi-domain and Fusion Proteins by Protein Trans-splicing in Vivo and in Vitro
Overview
Affiliations
Segmental isotopic labeling is a powerful labeling technique for reducing nuclear magnetic resonance (NMR) signal overlap, which is associated with larger proteins by incorporating stable isotopes into only one region of a protein for NMR detections. Segmental isotopic labeling can not only reduce complexities of NMR spectra but also retain possibilities to carry out sequential resonance assignments by triple-resonance NMR experiments. We described in vivo (i.e., in Escherichia coli) and in vitro protocols for segmental isotopic labeling of multi-domain and fusion proteins via protein trans-splicing (PTS) using split DnaE intein without any refolding steps or alpha-thioester modification. The advantage of PTS approach is that it can be carried out in vivo by time-delayed dual-expression system with two controllable promoters. A segmentally isotope-labeled protein can be expressed in Escherichia coli within 1 d once required vectors are constructed. The total preparation time of a segmentally labeled sample can be as short as 7-13 d depending on the protocol used.
Selective deuteration of an RNA:RNA complex for structural analysis using small-angle scattering.
Munsayac A, Leite W, Hopkins J, Hall I, ONeill H, Keane S bioRxiv. 2024; .
PMID: 39314299 PMC: 11419110. DOI: 10.1101/2024.09.09.612093.
Ligation of multiple protein domains using orthogonal inteins with non-native splice junctions.
Romero-Casanas A, Garcia-Lizarribar A, Castro J, Vilanova M, Benito A, Ribo M Protein Sci. 2024; 33(7):e5070.
PMID: 38864750 PMC: 11168065. DOI: 10.1002/pro.5070.
Efficient Segmental Isotope Labeling of Integral Membrane Proteins for High-Resolution NMR Studies.
Daniilidis M, Sperl L, Muller B, Babl A, Hagn F J Am Chem Soc. 2024; 146(22):15403-15410.
PMID: 38787792 PMC: 11157531. DOI: 10.1021/jacs.4c03294.
Feasibility of Domain Segmentation of B19V VP1u Using Intein Technology for Structural Studies.
Lakshmanan R, Agbandje-Mckenna M, McKenna R Protein Pept Lett. 2024; 31(2):161-167.
PMID: 38243925 DOI: 10.2174/0109298665277211231214065419.
Synthetic circuits based on split Cas9 to detect cellular events.
Przybyszewska-Podstawka A, Czapinski J, Kalafut J, Rivero-Muller A Sci Rep. 2023; 13(1):14988.
PMID: 37696879 PMC: 10495424. DOI: 10.1038/s41598-023-41367-z.