发明名称 |
Methods to measure dissociation rates for ligands that form reversible covalent bonds |
摘要 |
The crystal structure of the ligand binding domain of ERR-α in complex with a ligand that forms a reversible thioether bond to Cys325 of ERR-α, methods to measure dissociation rates for ligands that form reversible covalent bonds, and methods to design ligands that form reversible covalent bonds for use as modulators of ERR-α activity are disclosed. The crystal structure and methods provide a novel molecular mechanism for modulation of the activity of ERR-α and provide the basis for rational drug design to obtain potent specific ligands for use as modulators of the activity of this new drug target. |
申请公布号 |
US8927297(B2) |
申请公布日期 |
2015.01.06 |
申请号 |
US201012850117 |
申请日期 |
2010.08.04 |
申请人 |
Janssen Pharmaceutica N.V. |
发明人 |
Rentzeperis Dionisios;Abad Marta Cristina;Barnakova Ludmila A.;Lewandowski Frank A.;Milligan Cynthia M. |
分类号 |
G01N33/53;G01N33/68 |
主分类号 |
G01N33/53 |
代理机构 |
|
代理人 |
Brock Sean C. |
主权项 |
1. A method to measure the dissociation rate of a ligand that forms a reversible covalent bond with a protein, wherein said protein is an Estrogen Related Receptor alpha (ERR-α), comprising the steps of:
(a) measuring by LC/MS a mass for the protein, a mass for a first ligand that forms a reversible covalent thioether bond with the protein at Cys325, and a mass for a competing second ligand that forms a reversible covalent bond with the protein, wherein the competing second ligand has a different mass than the first ligand; (b) mixing the protein and the first ligand in a solution with the first ligand in molar excess of the protein; (c) incubating the protein and the first ligand in the solution to allow for a protein:ligand complex to form; (d) removing an aliquot of the solution and measuring by LC/MS the mass for the protein:ligand complex; (e) adding the competing second ligand to the solution containing the protein:ligand complex, wherein the competing second ligand is in molar excess to the protein:ligand complex and in molar excess to the first ligand; (f) removing aliquots of the solution at time 0 and at regular time intervals; (g) measuring the time-dependent change in the mass of the protein:ligand complex equal to the mass difference of the first ligand and the competing second ligand; and, (h) determining the dissociation rate for the first ligand. |
地址 |
Beerse BE |