Results 1 to 10 of about 23,416 (220)

Breaking of icosahedral symmetry: C60 to C70. [PDF]

PLoS ONE, 2014
We describe the existence and structure of large fullerenes in terms of symmetry breaking of the C60 molecule. Specifically, we describe the existence of C70 in terms of breaking of the icosahedral symmetry of C60 by the insertion into its middle of an ...
Mark Bodner, Jiri Patera, Marzena Szajewska   +2 more
doaj   +4 more sources

Flaviviruses have imperfect icosahedral symmetry. [PDF]

Proc Natl Acad Sci U S A, 2018
Flaviviruses assemble initially in an immature, noninfectious state and undergo extensive conformational rearrangements to generate mature virus. Previous cryo-electron microscopy (cryo-EM) structural studies of flaviviruses assumed icosahedral symmetry and showed the concentric organization of the external glycoprotein shell, the lipid membrane, and ...
Therkelsen MD, Klose T, Vago F, Jiang W, Rossmann MG, Kuhn RJ.   +5 more
europepmc   +4 more sources

First high-resolution synchrotron X-ray study of icosahedrite, a natural quasicrystal from the Khatyrka meteorite [PDF]

IUCrJ
Quasicrystals are long-range-ordered materials with rotational symmetry incompatible with periodicity. Takakura et al. [(2025). IUCrJ 12, 435–443] present a study of a single grain of icosahedrite, the first natural icosahedral quasicrystal, which was ...
Y. Ishii
doaj   +2 more sources

CryoVirusDB: An Annotated Dataset for AI-Based Virus Particle Identification in Cryo-EM Micrographs [PDF]

Viruses
With the advancements in instrumentation, image processing algorithms, and computational capabilities, single-particle cryo-electron microscopy (cryo-EM) has achieved atomic resolution in determining the 3D structures of viruses.
Rajan Gyawali, Ashwin Dhakal, Liguo Wang, Jianlin Cheng   +3 more
doaj   +2 more sources

Multiple nanocages of a cyanophage small heat shock protein with icosahedral and octahedral symmetries

Scientific Reports, 2021
The structures of a cyanophage small heat shock protein (sHSP) were determined as octahedrons of 24-mers and 48-mers and as icosahedrons of 60-mers. An N-terminal deletion construct of an 18 kDa sHSP of Synechococcus sp. phage S-ShM2 crystallized as a 24-
Sreeparna Biswas, Priyanka Garg, Somnath Dutta, Kaza Suguna   +3 more
doaj   +1 more source

Breaking Symmetry in Viral Icosahedral Capsids as Seen through the Lenses of X-ray Crystallography and Cryo-Electron Microscopy

Viruses, 2018
The majority of viruses on Earth form capsids built by multiple copies of one or more types of a coat protein arranged with 532 symmetry, generating an icosahedral shell.
Kristin N. Parent, Jason R. Schrad, Gino Cingolani   +2 more
doaj   +1 more source

Lattice Correspondence and Growth Structures of Monoclinic Mg4Zn7 Phase Growing on an Icosahedral Quasicrystal

Crystals, 2018
Mg 4 Zn 7 phase, with a monoclinic unit cell, a layered structure and a unique axis showing pseudo-tenfold symmetry, grows over icosahedral quasicrystalline phase in a manner similar to a decagonal quasicrystal.
Alok Singh, Julian M. Rosalie
doaj   +1 more source

The encapsulin from Thermotoga maritima is a flavoprotein with a symmetry matched ferritin-like cargo protein

Scientific Reports, 2021
Bacterial nanocompartments, also known as encapsulins, are an emerging class of protein-based ‘organelles’ found in bacteria and archaea. Encapsulins are virus-like icosahedral particles comprising a ~ 25–50 nm shell surrounding a specific cargo enzyme ...
Benjamin J. LaFrance, Caleb Cassidy-Amstutz, Robert J. Nichols, Luke M. Oltrogge, Eva Nogales, David F. Savage   +5 more
doaj   +1 more source

Viral self-assembly as a thermodynamic process [PDF]

, 2003
The protein shells, or capsids, of all sphere-like viruses adopt icosahedral symmetry. In the present paper we propose a statistical thermodynamic model for viral self-assembly.
Bruinsma, Robijn F., Gelbart, William M., Reguera, David, Rudnick, Joseph, Zandi, Roya   +4 more
core   +3 more sources

Quartic double solids with icosahedral symmetry [PDF]

European Journal of Mathematics, 2015
19 ...
Cheltsov, Ivan, PRZYJALKOWSKI, VICTOR, Shramov, Konstantin   +2 more
openaire   +4 more sources