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Title: The myosin II coiled-coil domain atomic structure in its native environment

Abstract

Significance Myosin II is the molecule that produces force in muscle contraction. Unlike the myosin head, its molecular motor, no atomic resolution structure of the ∼1000-residue–long α-helical coiled-coil tail has been reported. Here, we describe the cryo-EM atomic structure of the myosin tail within a native muscle thick filament. Three differences with crystal structures of myosin tail segments were found. The myosin head arrangement apparently alters the beginning of the tail. Striated muscle myosins have four skip residues, amino acids inserted to improve the alignment of charged residue clusters. Skips 1 and 3 agree with the crystal structures. Skip 2, which is a novel structure, and Skip 4 do not. Functional consequences are suggested by the myosin tail packing.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [2]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [3]
  1. Institute of Molecular Biophysics, Florida State University, Tallahassee, FL 32306-4380,, Department of Physics, Florida State University, Tallahassee, FL 32306-4380,
  2. Department of Chemistry and Biochemistry, University of California San Diego, La Jolla, CA 92093,
  3. Institute of Molecular Biophysics, Florida State University, Tallahassee, FL 32306-4380,
  4. Department of Biological Sciences, Illinois Institute of Technology, Chicago, IL 60616,
  5. Department of Cell Biology, Duke University Medical Center, Durham, NC 27607
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1773201
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Published Article
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 118 Journal Issue: 14; Journal ID: ISSN 0027-8424
Publisher:
Proceedings of the National Academy of Sciences
Country of Publication:
United States
Language:
English

Citation Formats

Rahmani, Hamidreza, Ma, Wen, Hu, Zhongjun, Daneshparvar, Nadia, Taylor, Dianne W., McCammon, J. Andrew, Irving, Thomas C., Edwards, Robert J., and Taylor, Kenneth A. The myosin II coiled-coil domain atomic structure in its native environment. United States: N. p., 2021. Web. doi:10.1073/pnas.2024151118.
Rahmani, Hamidreza, Ma, Wen, Hu, Zhongjun, Daneshparvar, Nadia, Taylor, Dianne W., McCammon, J. Andrew, Irving, Thomas C., Edwards, Robert J., & Taylor, Kenneth A. The myosin II coiled-coil domain atomic structure in its native environment. United States. https://doi.org/10.1073/pnas.2024151118
Rahmani, Hamidreza, Ma, Wen, Hu, Zhongjun, Daneshparvar, Nadia, Taylor, Dianne W., McCammon, J. Andrew, Irving, Thomas C., Edwards, Robert J., and Taylor, Kenneth A. Mon . "The myosin II coiled-coil domain atomic structure in its native environment". United States. https://doi.org/10.1073/pnas.2024151118.
@article{osti_1773201,
title = {The myosin II coiled-coil domain atomic structure in its native environment},
author = {Rahmani, Hamidreza and Ma, Wen and Hu, Zhongjun and Daneshparvar, Nadia and Taylor, Dianne W. and McCammon, J. Andrew and Irving, Thomas C. and Edwards, Robert J. and Taylor, Kenneth A.},
abstractNote = {Significance Myosin II is the molecule that produces force in muscle contraction. Unlike the myosin head, its molecular motor, no atomic resolution structure of the ∼1000-residue–long α-helical coiled-coil tail has been reported. Here, we describe the cryo-EM atomic structure of the myosin tail within a native muscle thick filament. Three differences with crystal structures of myosin tail segments were found. The myosin head arrangement apparently alters the beginning of the tail. Striated muscle myosins have four skip residues, amino acids inserted to improve the alignment of charged residue clusters. Skips 1 and 3 agree with the crystal structures. Skip 2, which is a novel structure, and Skip 4 do not. Functional consequences are suggested by the myosin tail packing.},
doi = {10.1073/pnas.2024151118},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 14,
volume = 118,
place = {United States},
year = {Mon Mar 29 00:00:00 EDT 2021},
month = {Mon Mar 29 00:00:00 EDT 2021}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1073/pnas.2024151118

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