CRYSTAL STRUCTURE OF THE LARGE RIBOSOMAL SUBUNIT FROM S. AUREUS
First Claim
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1. A method producing a ligand having an affinity to a binding site of a large ribosomal subunit of a pathogenic bacterium, the method comprising:
- (a) obtaining positioning data indicative of atomic coordinates of at least one binding site determined from an electron density map having a resolution of at least 4 Å
calculated from X-rays diffraction data obtained using at least one of a composition-of-matter that comprises a crystallized Staphylococcus aureus 50S large ribosomal subunit, wherein the crystallized 50S large ribosomal subunit effectively diffracts X-rays for calculating an electron density map and determination of atomic coordinates to a resolution of at least 4 Å and
forms in a hexagonal space group with unit cell dimensions of a=279.6±
10 Å
, b=279.6±
10 Å
, c=872.7±
10 Å
, α
=90, β
=90, γ
=120;
(b) calculating a molecular surface of the binding site;
(c) computationally constructing a model of a chemically feasible ligand having a molecular surface that match the molecular surface of the binding site; and
synthesizing the ligand based on said model.
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Abstract
A composition-of-matter comprising a crystallized form of a large ribosomal (50S) subunit of a pathogenic bacterium, and the atomic coordinates of the three-dimensional structure thereof are provided herein, as well as methods for crystallizing the same, and using the atomic coordinates of the same to design de novo ligands with high specificity thereto.
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19 Claims
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1. A method producing a ligand having an affinity to a binding site of a large ribosomal subunit of a pathogenic bacterium, the method comprising:
-
(a) obtaining positioning data indicative of atomic coordinates of at least one binding site determined from an electron density map having a resolution of at least 4 Å
calculated from X-rays diffraction data obtained using at least one of a composition-of-matter that comprises a crystallized Staphylococcus aureus 50S large ribosomal subunit, wherein the crystallized 50S large ribosomal subunit effectively diffracts X-rays for calculating an electron density map and determination of atomic coordinates to a resolution of at least 4 Å and
forms in a hexagonal space group with unit cell dimensions of a=279.6±
10 Å
, b=279.6±
10 Å
, c=872.7±
10 Å
, α
=90, β
=90, γ
=120;(b) calculating a molecular surface of the binding site; (c) computationally constructing a model of a chemically feasible ligand having a molecular surface that match the molecular surface of the binding site; and synthesizing the ligand based on said model. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification