Receptors method for purification of G protein-linked
First Claim
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1. A method for purification of a receptor polypeptide comprising:
- (a) contacting a ligand capable of specifically binding the receptor with cell membranes containing the receptor to form a receptor;
ligand complex;
(b) solubilizing the receptor;
ligand complex;
(c) contacting the solubilized receptor;
ligand complex with a solid phase substrate which binds the receptor;
ligand complex by specifically binding with the ligand;
(d) dissociating the receptor from the substrate bound receptor;
ligand complex with an eluant capable of releasing the receptor from the receptor;
ligand complex to produce an eluate containing a purified receptor.
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Abstract
The receptor:ligand complex is applied to a solid phase substrate which binds the complex by specifically binding the ligand. The receptor is dissociated from the substrate bound receptor:ligand complex with an eluant capable of releasing the receptor from the ligand and leaving the ligand bound to the solid phase substrate. GTP containing eluants are effective. The receptor is recovered from the eluate and optionally subjected to further purification.
18 Citations
20 Claims
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1. A method for purification of a receptor polypeptide comprising:
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(a) contacting a ligand capable of specifically binding the receptor with cell membranes containing the receptor to form a receptor;
ligand complex;(b) solubilizing the receptor;
ligand complex;(c) contacting the solubilized receptor;
ligand complex with a solid phase substrate which binds the receptor;
ligand complex by specifically binding with the ligand;(d) dissociating the receptor from the substrate bound receptor;
ligand complex with an eluant capable of releasing the receptor from the receptor;
ligand complex to produce an eluate containing a purified receptor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for purification of a G protein-linked somatostatin receptor comprising:
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(a) contacting a biotinylated somatostatin analog ligand with cellular material containing the somatostatin receptor to form a receptor;
ligand complex;(b) solubilizing the receptor;
ligand complex in a bile salt-like detergent;(c) contacting the solubilized receptor;
ligand complex with a substrate containing avidin or streptavidin; and(d) contacting the bound receptor;
ligand complex with an eluant containing a dicationic chelating agent, or a GTP analog, or both to release the receptor into an eluate. - View Dependent Claims (16, 17, 18, 19, 20)
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15. The method of claim 15 in which the ligand is bioS28 or bioS14.
Specification