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lüll Crystallization of protein-ligand complexes Hassell AM; An G; Bledsoe RK; Bynum JM; Carter HL 3rd; Deng SJ; Gampe RT; Grisard TE; Madauss KP; Nolte RT; Rocque WJ; Wang L; Weaver KL; Williams SP; Wisely GB; Xu R; Shewchuk LMActa Crystallogr D Biol Crystallogr 2007[Jan]; 63 (Pt 1): 72-9Obtaining diffraction-quality crystals has long been a bottleneck in solving the three-dimensional structures of proteins. Often proteins may be stabilized when they are complexed with a substrate, nucleic acid, cofactor or small molecule. These ligands, on the other hand, have the potential to induce significant conformational changes to the protein and ab initio screening may be required to find a new crystal form. This paper presents an overview of strategies in the following areas for obtaining crystals of protein-ligand complexes: (i) co-expression of the protein with the ligands of interest, (ii) use of the ligands during protein purification, (iii) cocrystallization and (iv) soaks.|*Crystallization[MESH]|Animals[MESH]|Binding Sites[MESH]|Carrier Proteins/chemistry[MESH]|Crystallography, X-Ray/*methods[MESH]|Humans[MESH]|Ligands[MESH]|Liposomes/chemistry[MESH]|Molecular Conformation[MESH]|Mutation[MESH]|Proteins/*chemistry[MESH]|Receptors, Androgen/chemistry[MESH]|Receptors, Glucocorticoid/chemistry[MESH]|Receptors, Mineralocorticoid/chemistry[MESH]|Temperature[MESH] |