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4FC1

Ultra-high resolution neutron structure of crambin at room-temperature

Summary for 4FC1
Entry DOI10.2210/pdb4fc1/pdb
DescriptorCrambin (2 entities in total)
Functional Keywordsh/d exchange, neutron structure, unknown function
Biological sourceCrambe hispanica subsp. abyssinica (Abyssinian crambe,Abyssinian kale)
Total number of polymer chains1
Total formula weight4738.45
Authors
Kovalevsky, A.Y.,Chen, J.C.-H. (deposition date: 2012-05-23, release date: 2012-09-19, Last modification date: 2024-11-20)
Primary citationChen, J.C.,Hanson, B.L.,Fisher, S.Z.,Langan, P.,Kovalevsky, A.Y.
Direct observation of hydrogen atom dynamics and interactions by ultrahigh resolution neutron protein crystallography.
Proc.Natl.Acad.Sci.USA, 109:15301-15306, 2012
Cited by
PubMed Abstract: The 1.1 Å, ultrahigh resolution neutron structure of hydrogen/deuterium (H/D) exchanged crambin is reported. Two hundred ninety-nine out of 315, or 94.9%, of the hydrogen atom positions in the protein have been experimentally derived and resolved through nuclear density maps. A number of unconventional interactions are clearly defined, including a potential O─H…π interaction between a water molecule and the aromatic ring of residue Y44, as well as a number of potential C─H…O hydrogen bonds. Hydrogen bonding networks that are ambiguous in the 0.85 Å ultrahigh resolution X-ray structure can be resolved by accurate orientation of water molecules. Furthermore, the high resolution of the reported structure has allowed for the anisotropic description of 36 deuterium atoms in the protein. The visibility of hydrogen and deuterium atoms in the nuclear density maps is discussed in relation to the resolution of the neutron data.
PubMed: 22949690
DOI: 10.1073/pnas.1208341109
PDB entries with the same primary citation
Experimental method
NEUTRON DIFFRACTION (1.1 Å)
Structure validation

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