Abstract: The invention provides a method of assembling oligopeptide intermediates in a native chemical ligation reaction that eliminates self-ligation of bi-functional intermediates. An important aspect of the invention is a bi-functional intermediate with an N-terminal heterocyclic protecting group which effectively prevents self-ligation in the chemical assembly process. The present invention is useful in methods for convergent synthesis of polypeptides and proteins and improves the efficiency of native chemical ligation reactions, particularly where three or more peptide fragments are used to assemble a polypeptide or protein product.

Abstract: The present invention provides a method and compositions for synthesizing an oligopeptide or polypeptide by convergent assembly of a plurality of pairs of oligopeptides in chemical ligation reactions. An important aspect of the present invention is an oligopeptide having a C-terminal disulfide-protected carboxythioester group that can be deprotected to spontaneously generate a free C-terminal thioester moiety. This allows a single precursor to participate in a succession of chemical ligation reactions, thereby making the convergent synthesis approach possible. The present invention is useful in methods for chemical synthesis of oligopeptides, polypeptides and proteins, and improves the efficiency of native chemical ligation reactions, particularly where four or more peptide fragments are used to assemble an oligopeptide, polypeptide or protein product.

Abstract: The invention provides a method of assembling oligopeptide intermediates in a native chemical ligation reaction that eliminates self-ligation of bi-functional intermediates. An important aspect of the invention is a bi-functional intermediate with an N-terminal cyclic thiazolidine protecting group which effectively prevents self-ligation in the chemical assembly process. The present invention is useful in methods for convergent synthesis of polypeptides and proteins and improves the efficiency of native chemical ligation reactions, particularly where three or more peptide fragments are used to assemble a polypeptide or protein product.

Abstract: The present invention provides methods of assembling oligopeptides or polypeptides in a native chemical ligation reaction that eliminates the formation of unwanted side products resulting from the presence of an unprotected acidic C-terminal oligopeptide thioester. An important aspect of the present invention is providing side chain protected acidic C-terminal oligopeptide thioesters. The present invention is useful in methods for chemical synthesis of oligopeptides, polypeptides and proteins and improves the efficiency of native chemical ligation reactions, particularly where aspartyl or glutamyl peptide fragments are used to assemble an oligopeptide, polypeptide or protein product.

Abstract: This invention relates to a process for purifying a polypeptide, a capture tag useful for purifying a polypeptide and a periodate-cleavable amino acid derivative useful for purifying a polypeptide. The polypeptide to be purified comprises a vicinal-amino-thiol, vicinal-amino-hydoxyl, vicinal-diol or vicinal-diamino group. The purification process comprises attaching the polypeptide to a purification matrix by contacting the polypeptide with a purification matrix comprising aldehyde or ketone groups under conditions which favor formation of a heterocyclic ring system, washing the purification matrix, and releasing the polypeptide from the purification matrix.

Abstract: This invention relates to a process for purifying a polypeptide, a capture tag useful for purifying a polypeptide and a periodate-cleavable amino acid derivative useful for purifying a polypeptide.

Abstract: The invention relates to a compound suitable for inhibiting the influx of polymorphonuclear leukocytes (PMNs) into a tissue involved in a chronic inflammatory disease. The compound according to the invention is capable of forming a complex with N-acetyl-Pro-Gly-Pro. The invention also relates to a method of selecting such a compound, a pharmaceutical composition and an application of the compound.

Abstract: The present invention provides a method and compositions for synthesizing an oligopeptide or polypeptide by convergent assembly of a plurality of pairs of oligopeptides in chemical ligation reactions. An important aspect of the present invention is an oligopeptide having a C-terminal disulfide-protected carboxythioester group that can be deprotected to spontaneously generate a free C-terminal thioester moiety. This allows a single precursor to participate in a succession of chemical ligation reactions, thereby making the convergent synthesis approach possible. The present invention is useful in methods for chemical synthesis of oligopeptides, polypeptides and proteins, and improves the efficiency of native chemical ligation reactions, particularly where four or more peptide fragments are used to assemble an oligopeptide, polypeptide or protein product.

Abstract: The invention relates to a compound suitable for inhibiting the influx of polymorphonuclear leukocytes (PMNs) into a tissue involved in a chronic inflammatory disease. The compound according to the invention is capable of forming a complex with N-acetyl-Pro-Gly-Pro. The invention also relates to a method of selecting such a compound, a pharmaceutical composition and an application of the compound.

Abstract: The present invention provides methods of assembling oligopeptides or polypeptides in a native chemical ligation reaction that eliminates the formation of unwanted side products resulting from the presence of an unprotecte acidic C-terminal oligopeptide thioester. An important aspect of the present invention is providing side chain protected acidic C-terminal oligopeptide thioesters.

Abstract: The invention relates to a compound suitable for inhibiting the influx of polymorphonuclear leukocytes (PMNs) into a tissue involved in a chronic inflammatory disease. The compound according to the invention is capable of forming a complex with N-acetyl-Pro-Gly-Pro. The invention also relates to a method of selecting such a compound, a pharmaceutical composition and an application of the compound.

Abstract: The invention provides a method of assembling oligopeptide intermediates in a native chemical ligation reaction that eliminates self-ligation of bi-functional intermediates. An important aspect of the invention is a bi-functional intermediate with an N-terminal heterocyclic protecting group which effectively prevents self-ligation in the chemical assembly process. The present invention is useful in methods for convergent synthesis of polypeptides and proteins and improve,s; the efficiency of native chemical ligation reactions, particularly where three or more peptide fragments are used to assemble a polypeptide or protein product.

Abstract: The invention provides a method of assembling oligopeptide intermediates in a native chemical ligation reaction that eliminates self-ligation of bi-functional intermediates. An important aspect of the invention is a bi-functional intermediate with an N-terminal cyclic thiazolidine protecting group which effectively prevents self-ligation in the chemical assembly process. The present invention is useful in methods for convergent synthesis of polypeptides and proteins and improves the efficiency of native chemical ligation reactions, particularly where three or more peptide fragements are used to assemble a polypeptide or protein product.

Abstract: The invention relates to a compound suitable for inhibiting the influx of polymorphonuclear leukocytes (PMNs) into a tissue involved in a chronic inflammatory disease. The compound according to the invention is capable of forming a complex with N-acetyl-Pro-Gly-Pro. The invention also relates to a method of selecting such a compound, a pharmaceutical composition and an application of the compound.

Abstract: The present invention is directed to a series of complementary peptides for the pro-gly-pro sequence as antagonists of polymorphonuclear leukocyte chemoattractants. Also provided are applications of such peptides for treating alkali-injuried eyes and other types of diseases.

Abstract: This invention relates to a process for purifying a polypeptide, a capture tag useful for purifying a polypeptide and a periodate-cleavable amino acid derivative useful for purifying a polypeptide.

Abstract: The present invention is directed to a series of complementary peptides for the pro-gly-pro sequence as antagonists of polymorphonuclear leukocyte chemoattractants. Also provided are applications of such peptides for treating alkali-injuried eyes and other types of diseases.

Abstract: The present invention is directed to a series of complementary peptides for the pro-gly-pro sequence as antagonists of polymorphonuclear leukocyte chemoattractants. Also provided are applications of such peptides for treating alkali-injuried eyes and other types of diseases.