Author
Listed:
- Nadine Ehmann
(Institute of Physiology, University of Würzburg)
- Sebastian van de Linde
(University of Würzburg)
- Amit Alon
(Wise Faculty of Life Sciences, Tel Aviv University)
- Dmitrij Ljaschenko
(Institute of Physiology, University of Würzburg)
- Xi Zhen Keung
(Institute of Physiology, University of Würzburg)
- Thorge Holm
(University of Würzburg)
- Annika Rings
(European Neuroscience Institute, University Medical Center Göttingen
Carl-Ludwig-Institute of Physiology, Medical Faculty, University of Leipzig)
- Aaron DiAntonio
(Washington University School of Medicine)
- Stefan Hallermann
(European Neuroscience Institute, University Medical Center Göttingen
Carl-Ludwig-Institute of Physiology, Medical Faculty, University of Leipzig)
- Uri Ashery
(Wise Faculty of Life Sciences, Tel Aviv University
Sagol School of Neuroscience, Tel Aviv University)
- Manfred Heckmann
(Institute of Physiology, University of Würzburg)
- Markus Sauer
(University of Würzburg)
- Robert J. Kittel
(Institute of Physiology, University of Würzburg)
Abstract
The precise molecular architecture of synaptic active zones (AZs) gives rise to different structural and functional AZ states that fundamentally shape chemical neurotransmission. However, elucidating the nanoscopic protein arrangement at AZs is impeded by the diffraction-limited resolution of conventional light microscopy. Here we introduce new approaches to quantify endogenous protein organization at single-molecule resolution in situ with super-resolution imaging by direct stochastic optical reconstruction microscopy (dSTORM). Focusing on the Drosophila neuromuscular junction (NMJ), we find that the AZ cytomatrix (CAZ) is composed of units containing ~137 Bruchpilot (Brp) proteins, three quarters of which are organized into about 15 heptameric clusters. We test for a quantitative relationship between CAZ ultrastructure and neurotransmitter release properties by engaging Drosophila mutants and electrophysiology. Our results indicate that the precise nanoscopic organization of Brp distinguishes different physiological AZ states and link functional diversification to a heretofore unrecognized neuronal gradient of the CAZ ultrastructure.
Suggested Citation
Nadine Ehmann & Sebastian van de Linde & Amit Alon & Dmitrij Ljaschenko & Xi Zhen Keung & Thorge Holm & Annika Rings & Aaron DiAntonio & Stefan Hallermann & Uri Ashery & Manfred Heckmann & Markus Saue, 2014.
"Quantitative super-resolution imaging of Bruchpilot distinguishes active zone states,"
Nature Communications, Nature, vol. 5(1), pages 1-12, December.
Handle:
RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5650
DOI: 10.1038/ncomms5650
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