Provided herein are engineered decarboxylase polypeptides that are useful for catalyzing the decarboxylation of amino acids such as L-tyrosine to produce tyramine or catalyzing the decarboxylation of L-DOPA to produce dopamine. Also provided are the preparation process of engineered decarboxylase polypeptides as well as reaction process under industrial-relevant conditions. The disclosure also provides polynucleotide sequences encoding engineered decarboxylase polypeptides, recombinant host cells capable of expressing engineered decarboxylase polypeptides, and methods of producing tyramine or dopamine using the engineered decarboxylase polypeptides. Compared to the wild type decarboxylase, the engineered polypeptide provided by this disclosure has better activity and/or stability. The use of the engineered polypeptides for the preparation of tyramine or dopamine reduces the production cost and has a good industrial application prospect.

Compositions comprising modified recombinant polymerizing enzymes are provided, along with nucleic acid molecules encoding the modified polymerizing enzymes. In some aspects, methods of using such polymerizing enzymes to synthesize a nucleic acid molecule or to sequence a nucleic acid template are provided.

Compositions comprising modified recombinant polymerizing enzymes are provided, along with nucleic acid molecules encoding the modified polymerizing enzymes. In some aspects, methods of using such polymerizing enzymes to synthesize a nucleic acid molecule or to sequence a nucleic acid template are provided.

The invention relates to the uses of a new characterized TET protein showed restricted to N-terminus glycine residues exopeptidase. The invention also relates to a method comprising said use of said new characterized TET protein as a N-terminus glycine residues specific exopeptidase. The invention further relates to a support wherein it is immobilized on said new characterized TET protein as a N-terminus glycine residues specific exopeptidase.

Described herein are methods of producing biosynthetic bacterial cellulose membranes having improved characteristics that are advantageous for use in various biological applications, including medicine.

Described herein are methods of producing biosynthetic bacterial cellulose membranes having improved characteristics that are advantageous for use in various biological applications, including medicine.

The invention provides a transaminase mutant and application thereof, wherein the amino acid sequence of the transaminase mutant is formed after mutation of the amino acid sequence as shown in SEQ ID NO: 1, and mutated amino acid sites comprise T7C+S47C sites. The transaminase mutant having the mutation sites can be further prepared into an immobilized enzyme through an immobilization technology, the immobilized enzyme has relatively high activity and high stability, can be recycled for multiple times, and is applicable to continuous flow reaction in a packed bed.

The invention provides a transaminase mutant and application thereof, wherein the amino acid sequence of the transaminase mutant is formed after mutation of the amino acid sequence as shown in SEQ ID NO: 1, and mutated amino acid sites comprise T7C+S47C sites. The transaminase mutant having the mutation sites can be further prepared into an immobilized enzyme through an immobilization technology, the immobilized enzyme has relatively high activity and high stability, can be recycled for multiple times, and is applicable to continuous flow reaction in a packed bed.

Methods for immobilizing a protein or functional protein fragment on a surface in a controlled orientation, for immobilizing a protein or functional protein fragment on a surface with efficient immobilization loading of the protein or protein fragment, and for immobilizing a protein or functional protein fragment on a surface with retention of the activity of the protein or protein fragment. In the methods, a tetrazine-modified protein or a tetrazine-modified functional protein fragment is contacted with a trans-cyclooctene-modified surface to provide a surface having the protein or functional protein fragment immobilized thereon. Surfaces having a protein or functional protein fragment immobilized thereon obtainable by the method and methods for using the surfaces for measuring the binding of a ligand to a protein or functional protein fragment.

Described herein are various embodiments of methods for binding together textured substrates using mycelium-producing fungi. The method can generally include providing a textured substrate, such as a textured protein substrate, that may or may not be subjected to various pre-processing steps used to help promote mycelium growth inside, outside or inside and outside of the textured substrate, inoculating the textured substrate with mycelium-producing fungi, and growing mycelium inside, outside, or inside and outside of the textured substrate to bind the textured substrate. The bound textured substrate can be used as a high protein food, such as meat substitutes, meat analogues, or seafood analogues. In some embodiments, the mycelium-producing fungi is used to bind together multiple textured substrates to form larger composite food products.