Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 52, Pages 16521-16525Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201707623
Keywords
membrane proteins; protein engineering; protein-protein interactions; SpyTag/SpyCatcher; synthetic biology
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Funding
- European Research Council [ERC-2013-CoG 615945-PeptidePadlock]
- Engineering and Physical Sciences Research Council [EPSRC EP/N023226/1]
- Yayasan Khazanah, Oxford Centre for Islamic Studies plus St. John's College Oxford
- Engineering and Physical Sciences Research Council [EP/N023226/1] Funding Source: researchfish
- EPSRC [EP/N023226/1] Funding Source: UKRI
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SpyTag is a peptide that forms a spontaneous amide bond with its protein partner SpyCatcher. This protein superglue is a broadly useful tool for molecular assembly, locking together biological building blocks efficiently and irreversibly in diverse architectures. We initially developed SpyTag and SpyCatcher by rational design, through splitting a domain from a Gram-positive bacterial adhesin. In this work, we established a phage-display platform to select for specific amidation, leading to an order of magnitude acceleration for interaction of the SpyTag002 variant with the SpyCatcher002 variant. We show that the 002 pair bonds rapidly under a wide range of conditions and at either protein terminus. SpyCatcher002 was fused to an intimin derived from enterohemorrhagic Escherichia coli. SpyTag002 reaction enabled specific and covalent decoration of intimin for live cell fluorescent imaging of the dynamics of the bacterial outer membrane as cells divide.
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