Compounds having cytotoxic and/or anti-mitotic activity are disclosed. Methods associated with preparation and use of such compounds, as well as pharmaceutical compositions comprising such compounds, are also disclosed. Also disclosed are compositions having the structure: (T)-(L)-(D), wherein (T) is a targeting moiety, (L) is an optional linker, and (D) is a compound having cytotoxic and/or anti-mitotic activity.

The present invention relates to extended recombinant polypeptide (XTEN) compositions, conjugate compositions comprising XTEN and XTEN linked to cross-linkers useful for conjugation to pharmacologically active payloads, methods of making highly purified XTEN, methods of making XTEN-linker and XTEN-payload conjugates, and methods of using the XTEN-cross-linker and XTEN-payload compositions.

The present invention is directed to novel heteroaryl sulfone-based conjugation handles of the formula: (wherein R.sup.1, R.sup.2, Het, D, E, X, Y, Z, m, n, p, q, r, s and t are as defined herein), methods for their preparation, their use in synthesizing antibody drig conjugates, and the resulting antibody drig conjugates made with components having heteroaryl sulfone-based conjugation handles.

##STR00001##

Synthetic methods are described herein operable to efficiently produce a wide variety of molecular species through conjugate additions via decarboxylative mechanisms. For example, methods of functionalization of peptide residues are described, including selective functionalization of peptide C-terminal residues. In one aspect, a method of peptide functionalization comprises providing a reaction mixture including a Michael acceptor and a peptide and coupling the Michael acceptor with the peptide via a mechanism including decarboxylation of a peptide reside.

Disclosed herein are non-natural amino acids and dolastatin analogs that include at least one non-natural amino acid, and methods for making such non-natural amino acids and polypeptides. The dolastatin analogs can include a wide range of possible functionalities, but typically have at least one oxime, carbonyl, dicarbonyl, and/or hydroxylamine group. Also disclosed herein are non-natural amino acid dolastatin analogs that are further modified post-translationally, methods for effecting such modifications, and methods for purifying such dolastatin analogs. Typically, the modified dolastatin analogs include at least one oxime, carbonyl, dicarbonyl, and/or hydroxylamine group. Further disclosed are methods for using such non-natural amino acid dolastatin analogs and modified non-natural amino acid dolastatin analogs, including therapeutic, diagnostic, and other biotechnology use.

Provided herein are hemiasterlin derivatives, conjugates thereof, compositions comprising the derivatives or conjugates thereof, methods of producing the derivatives and conjugates thereof, and methods of using the derivatives, conjugates, and compositions for the treatment of cell proliferation. The derivatives, conjugates, and compositions are useful in methods of treatment and prevention of cell proliferation and cancer, methods of detection of cell proliferation and cancer, and methods of diagnosis of cell proliferation and cancer. In an embodiment, the hemiasterlin derivatives are according to Formula 1000:

##STR00001##

or a pharmaceutically acceptable salt, solvate, or tautomer thereof, wherein Ar, L, W.sup.1, W.sup.4, W.sup.5, SG, and R are as described herein.

Provided herein are tripeptide epoxy ketone protease inhibitors, methods of their preparation, related pharmaceutical compositions, and methods of using the same. For example, provided herein are compounds of Formula (X): ##STR00001##
and pharmaceutically acceptable salts and compositions including the same. The compounds and compositions provided herein may be used, for example, in the treatment of diseases including inflammation and neurodegenerative disease.

Provided herein are hemiasterlin derivatives, conjugates thereof, compositions comprising the derivatives or conjugates thereof, methods of producing the derivatives and conjugates thereof, and methods of using the derivatives, conjugates, and compositions for the treatment of cell proliferation. The derivatives, conjugates, and compositions are useful in methods of treatment and prevention of cell proliferation and cancer, methods of detection of cell proliferation and cancer, and methods of diagnosis of cell proliferation and cancer. In an embodiment, the hemiasterlin derivatives are according to Formula 1000:

##STR00001##

or a pharmaceutically acceptable salt, solvate, or tautomer thereof, wherein Ar, L, W.sup.1, W.sup.4, W.sup.5, SG, and R are as described herein.

Provided are a linker represented by Formula I or I′, an antibody-drug conjugate containing the same, and use of thereof, a pharmaceutical composition comprising the antibody-drug conjugate, and use of the antibody-drug conjugate for treating and/or preventing a disease.

##STR00001##

The present invention comprises conjugates comprising a monoclonal antibody conjugated to a cyclic PYY peptide. The invention also relates to pharmaceutical compositions and methods for use thereof. The novel conjugates are useful for preventing, treating or ameliorating diseases and disorders disclosed herein.