Nanoindentation of 35 Virus Capsids in a Molecular Model: Relating Mechanical Properties to Structure
- Publication Date
- June 13, 2013
- Journal
- PLOS ONE
- Authors
- Marek Cieplak & Mark O. Robbins
- Volume
- 8
- Issue
- 6
- Pages
- e63640
- DOI
- https://dx.plos.org/10.1371/journal.pone.0063640
- Publisher URL
- http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0063640
- PubMed
- http://www.ncbi.nlm.nih.gov/pubmed/23785395
- PubMed Central
- http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3681840
- Europe PMC
- http://europepmc.org/abstract/MED/23785395
- Web of Science
- 000321038800122
- Scopus
- 84879059545
- Mendeley
- http://www.mendeley.com/research/nanoindentation-35-virus-capsids-molecular-model-relating-mechanical-properties-structure
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Mendeley | Further Information
{"title"=>"Nanoindentation of 35 Virus Capsids in a Molecular Model: Relating Mechanical Properties to Structure", "type"=>"journal", "authors"=>[{"first_name"=>"Marek", "last_name"=>"Cieplak", "scopus_author_id"=>"22960465100"}, {"first_name"=>"Mark O.", "last_name"=>"Robbins", "scopus_author_id"=>"7202254091"}], "year"=>2013, "source"=>"PLoS ONE", "identifiers"=>{"pui"=>"369122412", "sgr"=>"84879059545", "issn"=>"19326203", "pmid"=>"23785395", "scopus"=>"2-s2.0-84879059545", "doi"=>"10.1371/journal.pone.0063640"}, "id"=>"ae4c904b-f7e5-3276-a9a0-d5209f59dbeb", "abstract"=>"A coarse-grained model is used to study the mechanical response of 35 virus capsids of symmetries T = 1, T = 2, T = 3, pseudo T = 3, T = 4, and T = 7. The model is based on the native structure of the proteins that constitute the capsids and is described in terms of the C[Formula: see text] atoms associated with each amino acid. The number of these atoms ranges between 8 460 (for SPMV - satellite panicum mosaic virus) and 135 780 (for NBV - nudaureli virus). Nanoindentation by a broad AFM tip is modeled as compression between two planes: either both flat or one flat and one curved. Plots of the compressive force versus plate separation show a variety of behaviors, but in each case there is an elastic region which extends to a characteristic force [Formula: see text]. Crossing [Formula: see text] results in a drop in the force and irreversible damage. Across the 35 capsids studied, both [Formula: see text] and the elastic stiffness are observed to vary by a factor of 20. The changes in mechanical properties do not correlate simply with virus size or symmetry. There is a strong connection to the mean coordination number [Formula: see text], defined as the mean number of interactions to neighboring amino acids. The Young's modulus for thin shell capsids rises roughly quadratically with [Formula: see text], where 6 is the minimum coordination for elastic stability in three dimensions.", "link"=>"http://www.mendeley.com/research/nanoindentation-35-virus-capsids-molecular-model-relating-mechanical-properties-structure", "reader_count"=>22, "reader_count_by_academic_status"=>{"Professor > Associate Professor"=>1, "Student > Doctoral Student"=>5, "Researcher"=>1, "Student > Ph. D. Student"=>8, "Student > Postgraduate"=>1, "Student > Master"=>2, "Student > Bachelor"=>1, "Professor"=>3}, "reader_count_by_user_role"=>{"Professor > Associate Professor"=>1, "Student > Doctoral Student"=>5, "Researcher"=>1, "Student > Ph. D. Student"=>8, "Student > Postgraduate"=>1, "Student > Master"=>2, "Student > Bachelor"=>1, "Professor"=>3}, "reader_count_by_subject_area"=>{"Engineering"=>3, "Biochemistry, Genetics and Molecular Biology"=>3, "Materials Science"=>1, "Agricultural and Biological Sciences"=>8, "Physics and Astronomy"=>3, "Chemistry"=>4}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>3}, "Materials Science"=>{"Materials Science"=>1}, "Chemistry"=>{"Chemistry"=>4}, "Physics and Astronomy"=>{"Physics and Astronomy"=>3}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>8}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>3}}, "reader_count_by_country"=>{"United States"=>3}, "group_count"=>0}CrossRef
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Scopus | Further Information
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Relative Metric
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