Provided herein are methods for purifying recombinant A Disintegrin-like and Metallopeptidase with Thrombospondin Type 1 Motif 13 (ADAMTS13) protein from a sample. The method comprises enriching for ADAMTS13 protein by chromatographically contacting the sample with hydroxyapatite under conditions that allow ADAMTS13 protein to appear in the eluate or supernatant from the hydroxylapatite. The methods may further comprise tandem chromatography with a mixed mode cation exchange/hydrophobic interaction resin that binds ADAMTS13 protein. Additional optional steps involve ultrafiltration/diafiltration, anion exchange chromatography, cation exchange chromatography, and viral inactivation. Also provided herein are methods for inactivating virus contaminants in protein samples, where the protein is immobilized on a support. Also provided herein are compositions of ADAMTS13 prepared according to said methods.

Non-human animals, tissues, cells, and genetic material are provided that comprise a modification of an endogenous non-human heavy chain immunoglobulin sequence and that comprise an ADAM6 activity functional in a mouse, wherein the non-human animals express a human immunoglobulin heavy chain variable domain and a cognate human immunoglobulin λ light chain variable domain.

The invention provides methods for producing soluble di-chain BoNT/A protein.

The present disclosure relates to a gene recombinant vector of a collagenase, comprising a collagenase gene, wherein an amino acid sequence of a collagenase encoded by the collagenase gene is shown in SEQ ID NO. 1; moreover, a genetically engineered strain of the collagenase and a preparation method of the collagenase are also disclosed; and the collagenase prepared according to the invention is capable of degrading a bone collagen, and improving a yield of a low-molecular-weight bone collagen peptide.

Provided are modified isolated ADAM10 modulating peptides and methods of using the same to modulate ADAM10 biological activities, inhibit ADAM10 biological activities associated with diseases, disorders, or conditions in subjects, including but not limited to decreasing inflammation and inhibiting undesirablecell proliferation. In some embodiments, the modified isolated ADAM10 modulating peptides are based on SEQ ID NO: 3 or SEQ ID NO: 4, and in some embodiments include modifications at or near the N-terminal and/or the C-terminal ends of the disclosed peptides as well as substitutions, insertions, and deletions at one or more amino acid positions of the ADAM10 prodomain peptides disclosed herein.

This invention relates to ADAMTS13 variants and methods of administering ADAMTS13 variants to a treat a disease or condition associated with ADAMTS13 and VWF dysfunction.

Methods are provided for determining the presence of antibodies in blood or a blood product, using immobilized self-assembled polypeptides comprising an ectodomain and being recognized by the antibodies. The self-assembled polypeptide comprises at least a first chimeric polypeptide. In the methods the functionality and active conformation of the immobilized and self-assembled polypeptides is preserved. Processes for making the immobilized self-assembled polypeptides are also provided.

Methods and compositions are provided for making non-human animals with reduced tolerance of a foreign antigen of interest and making antigen-binding proteins against that foreign antigen of interest using such animals. The methods and compositions employ CRISPR/Cas9 systems using multiple guide RNAs to reduce or eliminate expression of a self-antigen homologous to or sharing an epitope of interest with the foreign antigen of interest or to reduce or eliminate expression of an epitope on the self-antigen that is shared with the foreign antigen of interest.

The invention includes a chimeric autoantibody receptor (CAAR) comprising an extracellular domain comprising an ADAMTS13 autoantigen or fragment thereof, compositions comprising the CAAR, nucleic acids encoding the CAAR, vectors comprising a nucleic acid encoding the CAAR, and recombinant cells comprising the CAAR.

The present invention provides culture mediums that are useful for the expression of ADAMTS proteins, such as ADAMTS13. Methods for the expression and purification of ADAMTS proteins are also provided. In some embodiments, the mediums and methods of the invention are useful for the expression of ADAMTS proteins having high specific activities. Also provided are ADAMTS, e.g., ADAMTS13, protein compositions with high specific activities, which are expressed and purified according to the methods provided herein.