Three-dimensional structure of the neuronal-Sec1–syntaxin 1a complex

Kira M. S. Misura, Richard H. Scheller and William I. Weis ()
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Kira M. S. Misura: Stanford University School of Medicine
Richard H. Scheller: Molecular and Cellular Physiology and the Howard Hughes Medical Institute, Stanford University School of Medicine
William I. Weis: Stanford University School of Medicine

Nature, 2000, vol. 404, issue 6776, 355-362

Abstract: Abstract Syntaxin 1a and neuronal Sec1 (nSec1) form an evolutionarily conserved heterodimer that is essential for vesicle trafficking and membrane fusion. The crystal structure of the nSec1–syntaxin 1a complex, determined at 2.6 Å resolution, reveals that major conformational rearrangements occur in syntaxin relative to both the core SNARE complex and isolated syntaxin. We identify regions of the two proteins that seem to determine the binding specificity of particular Sec1 proteins for syntaxin isoforms, which is likely to be important for the fidelity of membrane trafficking. The structure also indicates mechanisms that might couple the action of upstream effector proteins to conformational changes in syntaxin 1a and nSec1 that lead to core complex formation and membrane fusion.

Date: 2000
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DOI: 10.1038/35006120

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