Abstract:
Bringing membrane proteins into aqueous solution generally requires the use of detergents or other amphiphilic agents. The invention provides a new class of amphiphiles, each of which includes a multi-fused ring system as a lipophilic group. These new amphiphiles confer enhanced stability to a range of membrane proteins in solution relative to conventional detergents, leading to improved structural and functional stability of membrane proteins, including integral membrane proteins. Accordingly, the invention provides new amphiphiles for biochemical manipulations and characterization of membrane proteins. These amphiphiles display favorable behavior with membrane proteins and can be used to aid the solubilization, isolation, purification, stabilization, crystallization, and/or structural determination of membrane proteins.
Abstract:
The invention provides amphiphilic compounds and methods for manipulating membrane proteins. Compounds of the invention, for example, the compounds of Formulas I-XIX, can be prepared from readily available starting materials. The amphiphilic compounds can manipulate membrane protein at relatively low concentrations compared to many known detergents. The compounds can be used to aid the isolation of membrane proteins, for example, to aid their solubilization and/or purification. The compounds can also be used to aid the functional and structural determination of membrane proteins, including their stabilization and crystallization.
Abstract:
Disclosed are compounds and methods for manipulating proteins in general and membrane proteins in particular. The compounds can be prepared from cholic acid, deoxycholic acid, lithocholic acid, or derivatives thereof. The compounds typically possess critical micelle concentrations lower than those of known detergents such as CHAPS and CHAPSO. Accordingly, lower amounts of the compounds are required for effective solubilization of membrane proteins. The compounds can be used aid the solubilization, isolation, purification, stabilization, crystallization, and/or structural determination of membrane proteins.
Abstract:
Bringing membrane proteins into aqueous solution generally requires the use of detergents or other amphiphilic agents. The invention provides a new class of amphiphiles, each of which includes a multi-fused ring system as a lipophilic group. These new amphiphiles confer enhanced stability to a range of membrane proteins in solution relative to conventional detergents, leading to improved structural and functional stability of membrane proteins, including integral membrane proteins. Accordingly, the invention provides new amphiphiles for biochemical manipulations and characterization of membrane proteins. These amphiphiles display favorable behavior with membrane proteins and can be used to aid the solubilization, isolation, purification, stabilization, crystallization, and/or structural determination of membrane proteins.
Abstract:
The invention provides compounds and methods, for example, to carry out organocatalytic Michael additions of aldehydes to cyclically constrained nitroethylene compounds catalyzed by a proline derivative to provide cyclically constrained α-substituted-γ-nitro-aldehydes. The reaction can be rendered enantioselective when a chiral pyrrolidine catalyst is used, allowing for Michael adducts in nearly optically pure form (e.g., 96 to >99% e.e.).The Michael adducts can bear a single substituent or dual substituents adjacent to the carbonyl. The Michael adducts can be efficiently converted to cyclically constrained protected γ-amino acid residues, which are essential for systematic conformational studies of γ-peptide foldamers. New methods are also provided to prepare other γ-amino acids and peptides. These new building blocks can be used to prepare foldamers, such as α/γ-peptide foldamers, that adopt specific helical conformations in solution and in the solid state.
Abstract:
The invention provides compounds and methods, for example, to carry out organocatalytic Michael additions of aldehydes to cyclically constrained nitroethylene compounds catalyzed by a proline derivative to provide cyclically constrained α-substituted-γ-nitro-aldehydes. The reaction can be rendered enantioselective when a chiral pyrrolidine catalyst is used, allowing for Michael adducts in nearly optically pure form (e.g., 96 to >99% e.e.).The Michael adducts can bear a single substituent or dual substituents adjacent to the carbonyl. The Michael adducts can be efficiently converted to cyclically constrained protected γ-amino acid residues, which are essential for systematic conformational studies of γ-peptide foldamers. New methods are also provided to prepare other γ-amino acids and peptides. These new building blocks can be used to prepare foldamers, such as α/γ-peptide foldamers, that adopt specific helical conformations in solution and in the solid state.
Abstract:
Compounds, method of making the compounds, and methods of using the compounds to treat Type 2 diabetes and obesity in mammals, including humans. The compounds are dual GLP-1 receptor and GIP receptor agonists in which at least one side chain of a residue in GLP-1 and/or GIP is modified such that the modified GLP-1 and GIP are agonists of both GLP-1 receptor and GIP receptor.
Abstract:
The invention provides tandem facial amphiphiles for biochemical manipulations and characterization of membrane proteins, such as intrinsic membrane proteins. Members of this new family display favorable behavior with several membrane proteins. These amphiphiles can form relatively small micelles, and small changes in amphiphile chemical structures can result in large changes in their physical properties. The tandem facial amphiphiles can be used to aid the solubilization, isolation, purification, stabilization, crystallization, and/or structural determination of membrane proteins.
Abstract:
The invention provides compounds and methods, for example, to carry out organocatalytic Michael additions of aldehydes to cyclically constrained nitroethylene compounds catalyzed by a proline derivative to provide cyclically constrained α-substituted-γ-nitro-aldehydes. The reaction can be rendered enantioselective when a chiral pyrrolidine catalyst is used, allowing for Michael adducts in nearly optically pure form (e.g., 96 to >99% e.e.).The Michael adducts can bear a single substituent or dual substituents adjacent to the carbonyl. The Michael adducts can be efficiently converted to cyclically constrained protected γ-amino acid residues, which are essential for systematic conformational studies of γ-peptide foldamers. New methods are also provided to prepare other γ-amino acids and peptides. These new building blocks can be used to prepare foldamers, such as α/γ-peptide foldamers, that adopt specific helical conformations in solution and in the solid state.
Abstract:
Bringing membrane proteins into aqueous solution generally requires the use of detergents or other amphiphilic agents. The invention provides a new class of amphiphiles, each of which includes a multi-fused ring system as a lipophilic group. These new amphiphiles confer enhanced stability to a range of membrane proteins in solution relative to conventional detergents, leading to improved structural and functional stability of membrane proteins, including integral membrane proteins. Accordingly, the invention provides new amphiphiles for biochemical manipulations and characterization of membrane proteins. These amphiphiles display favorable behavior with membrane proteins and can be used to aid the solubilization, isolation, purification, stabilization, crystallization, and/or structural determination of membrane proteins.