Skip navigation
Skip navigation

Diffuse scattering resulting from macromolecular frustration

Welberry, Thomas; Heerdegen, Aidan; Goldstone, D. C.; Taylor, Ian A.

Description

Distinctive diffuse scattering in the form of diffuse rings around Bragg positions has been observed in the diffraction patterns of a crystal of the N-terminal fragment of the Gag protein from Feline Foamy Virus. It is shown that these are caused by geometric frustration as molecules try to pack on the triangular b-c mesh of the space group P6122. In order to explain the strong diffuse scattering it is necessary for the crystal to contain occupational disorder such that each unit cell contains...[Show more]

dc.contributor.authorWelberry, Thomas
dc.contributor.authorHeerdegen, Aidan
dc.contributor.authorGoldstone, D. C.
dc.contributor.authorTaylor, Ian A.
dc.date.accessioned2015-12-10T22:57:50Z
dc.identifier.issn0108-7681
dc.identifier.urihttp://hdl.handle.net/1885/60613
dc.description.abstractDistinctive diffuse scattering in the form of diffuse rings around Bragg positions has been observed in the diffraction patterns of a crystal of the N-terminal fragment of the Gag protein from Feline Foamy Virus. It is shown that these are caused by geometric frustration as molecules try to pack on the triangular b-c mesh of the space group P6122. In order to explain the strong diffuse scattering it is necessary for the crystal to contain occupational disorder such that each unit cell contains one or other of two different molecular arrangements, A and B. The frustration arises because the nearest-neighbour packing prefers neighbouring cells to be AB or BA, which cannot be achieved on all three sides of a triangle simultaneously. To explain the observation that reciprocal sections hk5n, where n = integer, contain only Bragg peaks it is necessary that A and B are identical molecular arrangements differing only by a translation of 0.2c. The implications of the disorder for solving the structure of the protein by conventional techniques as well as the possibility of using the diffuse scattering for this purpose are discussed.
dc.publisherMunksgaard International Publishers
dc.rightsAuthor/s retain copyright
dc.sourceActa Crystallographica Section B: Structural Science
dc.subjectKeywords: Bragg peaks; Bragg position; Conventional techniques; Diffuse rings; Diffuse scattering; disorder; Geometric frustration; Molecular arrangements; molecular packing; N-terminals; Nearest-neighbour; Space Groups; Unit cells; Occupational diseases; Viruses; diffuse scattering; disorder; molecular packing
dc.titleDiffuse scattering resulting from macromolecular frustration
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume67
dc.date.issued2011
local.identifier.absfor091205 - Functional Materials
local.identifier.ariespublicationu4005981xPUB551
local.type.statusPublished Version
local.contributor.affiliationWelberry, Thomas, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationHeerdegen, Aidan, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationGoldstone, D. C., National Institute for Medical Research
local.contributor.affiliationTaylor, Ian A., National Institute for Medical Research
local.bibliographicCitation.issue6
local.bibliographicCitation.startpage516
local.bibliographicCitation.lastpage524
local.identifier.doi10.1107/S0108768111037542
local.identifier.absseo970103 - Expanding Knowledge in the Chemical Sciences
local.identifier.absseo861002 - Ceramics
local.identifier.absseo869804 - Management of Solid Waste from Manufacturing Activities
dc.date.updated2016-02-24T10:24:42Z
local.identifier.scopusID2-s2.0-81855224805
local.identifier.thomsonID000297254300009
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

Download

File Description SizeFormat Image
01_Welberry_Diffuse_scattering_resulting_2011.pdf2.35 MBAdobe PDF


Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.

Updated:  19 May 2020/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator