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Sökning: WFRF:(Jenkins Huw T.)

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1.
  • Agirre, Jon, et al. (författare)
  • The CCP4 suite: integrative software for macromolecular crystallography
  • 2023
  • Ingår i: Acta Crystallographica Section D. - : INT UNION CRYSTALLOGRAPHY. - 2059-7983. ; 79, s. 449-461
  • Tidskriftsartikel (refereegranskat)abstract
    • The Collaborative Computational Project No. 4 (CCP4) is a UK-led international collective with a mission to develop, test, distribute and promote software for macromolecular crystallography. The CCP4 suite is a multiplatform collection of programs brought together by familiar execution routines, a set of common libraries and graphical interfaces. The CCP4 suite has experienced several considerable changes since its last reference article, involving new infrastructure, original programs and graphical interfaces. This article, which is intended as a general literature citation for the use of the CCP4 software suite in structure determination, will guide the reader through such transformations, offering a general overview of the new features and outlining future developments. As such, it aims to highlight the individual programs that comprise the suite and to provide the latest references to them for perusal by crystallographers around the world.
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2.
  • Okroj, Marcin, et al. (författare)
  • Structural basis and functional effects of the interaction between complement inhibitor C4b-binding protein and DNA.
  • 2008
  • Ingår i: Molecular Immunology. - : Elsevier BV. - 1872-9142 .- 0161-5890. ; 46, s. 62-69
  • Tidskriftsartikel (refereegranskat)abstract
    • Human C4b-binding protein (C4BP) is a soluble, multiple-subunit inhibitor of complement that circulates in blood. Recently C4BP was shown to bind DNA, reduce DNA release from necrotic cells and limit DNA-mediated complement activation in solution. Herein we employed nuclear magnetic resonance spectroscopy to measure chemical shift perturbations and used them to restrain the computational docking of a B-form 10-base-pair DNA molecule onto the solution structure of C4BP alpha-chain complement control protein (CCP) domains 1-2 (C4BP12). Six amino acid residues located on one face of the interdomain junction - Val(38), Ser(40), Thr(43), Tyr(62), Lys(63) and Arg(64) - exhibited the largest chemical shift changes. In the model, the DNA lies in a cleft formed by the interdomain interface. The double-helix is perpendicular to the long axis of C4BP12 consistent with the multiple arms of C4BP binding to adjacent sites on a longer DNA molecule. The DNA lies in a region previously shown to bind C4b and heparin and these molecules (but not C3b) inhibited the DNA-C4BP interaction. Nonetheless, crucial C4BP functions such as cofactor activity for factor I cleavage of C4b and C3b, and decay acceleration of the classical C3 convertase appeared not to be affected by the presence of DNA. Taken together these results reinforce the case for the occupation of some of the seven arms of C4BP in a multivalent interaction with DNA or surface bound glycosaminoglycans while other arms engage C4b or C3b.
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