期刊
EMBO JOURNAL
卷 39, 期 13, 页码 -出版社
WILEY
DOI: 10.15252/embj.2019102926
关键词
axon guidance; cis interaction; plexin; semaphorin; semaphorin signalling
资金
- Cancer Research UK [C375/A17721, MR/M000141/1]
- Medical Research Council [C375/A17721, MR/M000141/1]
- Netherlands Organization for Scientific Research (ALW-VICI)
- Wellcome Trust Centre grant [203141/Z/16/Z]
- EMBO Long-Term Fellowship [ALTF 604-2014]
- Nuffield Department of Medicine Leadership Fellowship
- MRC [MR/M000141/1] Funding Source: UKRI
Semaphorin ligands interact with plexin receptors to contribute to functions in the development of myriad tissues including neurite guidance and synaptic organisation within the nervous system. Cell-attached semaphorins interact intranswith plexins on opposing cells, but also incison the same cell. The interplay betweentransandcisinteractions is crucial for the regulated development of complex neural circuitry, but the underlying molecular mechanisms are uncharacterised. We have discovered a distinct mode of interaction through which theDrosophilasemaphorin Sema1b and mouse Sema6A mediate binding incisto their cognate plexin receptors. Our high-resolution structural, biophysical andin vitroanalyses demonstrate that monomeric semaphorins can mediate a distinctive plexin binding mode. These findings suggest the interplay between monomericvsdimeric states has a hereto unappreciated role in semaphorin biology, providing a mechanism by which Sema6s may balancecisandtransfunctionalities.
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