Abstract:
X-ray crystallography can be used to screen compounds that are not known ligands of a target biomolecule for their ability to bind the target biomolecule. The method includes obtaining a crystal of a target biomolecule; exposing the target biomolecule crystal to one or more test samples; and obtaining an X-ray crystal diffraction pattern to determine whether a ligand/receptor complex is formed. The target is exposed to the test samples by either co-crystallizing a biomolecule in the presence of one or more test samples or soaking the biomolecule crystal in a solution of one or more test samples. In another embodiment, structural information from ligand/receptor complexes are used to design ligands that bind tighter, that bind more specifically, that have better biological activity or that have better safety profile. A further embodiment of the invention comprises identifying or designing biologically-active moieties by the instant process. In a further embodiment, a biomolecule crystal having an easily accessible active site is formed by co-crystallizing the biomolecule with a degradable ligand and degrading the ligand.
Abstract:
A class of potent LHRH decapeptide antagonists possess N-alkylated aminoacyl residues where the side-chain portion of the residue is a 4-(substituted-amino)phenylalanyl, 4-(substituted-amino)cyclohexylalanyl, or OMEGA -(substituted-amino)alkyl group, and additionally the aminoacyl residues at position 5 are N-alkylated on the nitrogen atom of the peptide backbone.
Abstract:
Tetrahydroisoquinoline derivatives of formula (I): or a pharmaceutically acceptable salt, ester, or prodrug thereof, having activity as an LHRH antagonist, as well as pharmaceutical compositions containing the same, and methods for their use and preparation.
Abstract:
A class of potent LHRH decapeptide antagonists possess N-alkylated aminoacyl residues where the side-chain portion of the residue is a 4-(substituted-amino)phenylalanyl, 4-(substituted-amino)cyclohexylalanyl, or OMEGA -(substituted-amino)alkyl group, and additionally the aminoacyl residues at position 5 are N-alkylated on the nitrogen atom of the peptide backbone.
Abstract:
Method and apparatus for mounting a sample comprising a crystal for X-ray crystallographic analysis, a method for aligning a sample comprising a crystal for X-ray crystallographic analysis, which sample is mounted on a positioning device, and a method for determining the structure of a sample containing a crystal by means of X-ray crystallography.
Abstract:
X-ray crystallography can be used to screen compounds that are not known ligands of a target biomolecule for their ability to bind the target biomolecule. The method includes obtaining a crystal of a target biomolecule; exposing the target biomolecule crytal to one or more test samples; and obtaining an X-ray crystal diffraction pattern to determine whether a ligand/receptor complex is formed. The target is exposed to the test samples by either co-crystallizing a biomolecule in the presence of one or more test samples or soaking the biomolecule crystal in a solution of one or more test samples. In another embodiment, structural information from ligand/receptor complexes are used to design ligands that bind tighter, that bind more specifically, that have better biological activity or that have better safety profile. A further embodiment of the invention comprises identifying or designing biologically-active moieties by the instant process. In a further embodiment, a biomolecule crystal having an easily accessible active site is formed by co-crystallizing the biomolecule with a degradable ligand and degrading the ligand.
Abstract:
A class of potent LHRH decapeptide antagonists possess N-alkylated aminoacyl residues where the side-chain portion of the residue is a 4-(substituted-amino)phenylalanyl, 4-(substituted-amino)cyclohexylalanyl, or Φ-(substituted-amino)alkyl group, and additionally the aminoacyl residues at position 5 are N-alkylated on the nitrogen atom of the peptide backbone.
Abstract:
X-ray crystallography can be used to screen compounds that are not known ligands of a target biomolecule for their ability to bind the target biomolecule. The method includes obtaining a crystal of a target biomolecule; exposing the target biomolecule crytal to one or more test samples; and obtaining an X-ray crystal diffraction pattern to determine whether a ligand/receptor complex is formed. The target is exposed to the test samples by either co-crystallizing a biomolecule in the presence of one or more test samples or soaking the biomolecule crystal in a solution of one or more test samples. In another embodiment, structural information from ligand/receptor complexes are used to design ligands that bind tighter, that bind more specifically, that have better biological activity or that have better safety profile. A further embodiment of the invention comprises identifying or designing biologically-active moieties by the instant process. In a further embodiment, a biomolecule crystal having an easily accessible active site is formed by co-crystallizing the biomolecule with a degradable ligand and degrading the ligand.
Abstract:
The present invention provides a class of decapeptide compounds which are potent antagonists of LHRH activity and which have the structure A?1-D2-E3-G4-J5-L6-M7-Q8-R9-T10¿. The compounds of the percent invention are characterized by having an Φ-amino-functionalized side chain on the D-aminoacyl residue at position 6. The Φ-amino group of this side chain is further derivatized by the attachment of an extending group which likewise has a terminal amino group which is capped by an acyl group.