alexa Towards The Structure Of Muscle Z-disk Using Integrative Structural Biology | 66869
ISSN: 2329-6577

Biological Systems: Open Access
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JOINT EVENT on 2nd International Conference on Bioscience and 5th International Conference on Integrative Biology
June 19-21, 2017 London, UK

Kristina Djinovic-Carugo
University of Vienna, Austria
Keynote: Biol Syst Open Access
DOI: 10.4172/2329-6577-C1-007
Abstract
The sarcomere is the minimal contractile unit in the cardiac and skeletal muscle, where actin and myosin filaments slide past each other to generate tension. This molecular machinery is supported by a subset of highly organized cytoskeletal proteins that fulfill architectural, mechanical and signaling functions, including the giant proteins titin, obscurin and nebulin as well as the cross-linking proteins α-actinin and myomesin. The cross-linking of actin and myosin at the boundaries of their filamentous structures is essential for the muscle integrity and function. In the Z-disks, the lateral boundaries of the sarcomere machinery, the protein α-actinin-2 cross-links antiparallel actin filaments from adjacent sarcomeres, and additionally serves as a binding platform for a number of other Z-disk proteins. In striated muscle cells, the Z-disk represents a highly organized three-dimensional assembly containing a large directory of proteins orchestrated in a multi-protein complex centered on its major component α-actinin, with still poorly understood hierarchy and three-dimensional interaction map. On the way to elucidate the molecular structural architecture of the Z-disk, the hierarchy of its assembly and structure-function relationships, we are studying binary and higher order sub-complexes of α-actinin using biophysical, structural and cell biological approaches. Here, we will present recent data on interaction of muscle α-actinin and filamin-C with an adaptor proteins ZASP, myotilin and FATZ-1, forming a fuzzy complex with the latter, and discuss findings in view of muscle Z-disk architecture and assembly.
Biography

Kristina Djinovic-Carugo has completed her PhD from Ljubljana University and Post-doctoral studies from the University of Pavia and EMBL-Heidelberg. She is the Head of the Department of Structural and Computational Biology at the University of Vienna and the Director of Laura Bassi Center for optimized structural studies. The main area of her research is structural biology of actin based cytoskeleton with focus on striated muscle Z-disk. She uses an integrative structural biology approach, combining high resolution studies with complementary lower resolution biophysical and biochemical approaches. She has published more than 100 papers in international peer reviewed journals and is serving as a member of scientific advisory boards of repute.

Email: [email protected]

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