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Alliance"],"accepted":{"date-parts":[[2024,5,15]]},"published-print":{"date-parts":[[2024,8]]},"abstract":"<jats:p>In cells, mitochondria undergo constant fusion and fission. An essential factor for fission is the mammalian dynamin-related protein 1 (Drp1). Dysregulation of Drp1 is associated with neurodegenerative diseases including Parkinson\u2019s, cardiovascular diseases and cancer, making Drp1 a pivotal biomarker for monitoring mitochondrial status and potential pathophysiological conditions. Here, we developed nanobodies (Nbs) as versatile binding molecules for proteomics, advanced microscopy and live cell imaging of Drp1. To specifically enrich endogenous Drp1 with interacting proteins for proteomics, we functionalized high-affinity Nbs into advanced capture matrices. Furthermore, we detected Drp1 by bivalent Nbs combined with site-directed fluorophore labelling in super-resolution STORM microscopy. For real-time imaging of Drp1, we intracellularly expressed fluorescently labelled Nbs, so-called chromobodies (Cbs). To improve the signal-to-noise ratio, we further converted Cbs into a \u201cturnover-accelerated\u201d format. With these imaging probes, we visualized the dynamics of endogenous Drp1 upon compound-induced mitochondrial fission in living cells. Considering the wide range of research applications, the presented Nb toolset will open up new possibilities for advanced functional studies of Drp1 in disease-relevant models.<\/jats:p>","DOI":"10.26508\/lsa.202402608","type":"journal-article","created":{"date-parts":[[2024,5,30]],"date-time":"2024-05-30T13:20:35Z","timestamp":1717075235000},"page":"e202402608","update-policy":"https:\/\/doi.org\/10.26508\/lsa.crossmarkpolicy","source":"Crossref","is-referenced-by-count":3,"title":["Nanobodies as novel tools to monitor the mitochondrial fission factor Drp1"],"prefix":"10.26508","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0009-0001-3822-8858","authenticated-orcid":true,"given":"Theresa","family":"Froehlich","sequence":"first","affiliation":[{"name":"Pharmaceutical Biotechnology, Eberhard Karls University T\u00fcbingen, T\u00fcbingen, 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