An enzyme for reducing cystine to cysteine is a fusion protein that includes the protein activities of thioredoxin (protein i) having KEGG database number EC 1.8.4.8 or EC 1.8.4.10 and thioredoxin reductase (protein ii) having KEGG database number EC 1.8.1.9. The thioredoxin (protein i) is the protein activity of thioredoxin 1 from E. coli and the thioredoxin reductase (protein ii) is the protein activity of the thioredoxin reductase from E. coli. The activity of the fusion protein is at least 100% of the activity of a mixture of the same but unfused individual proteins i and ii. The fusion protein has the enzyme activity to reduce cystine to cysteine. The coding sequences (cds) responsible for the activity of protein i and ii has been fused.

Disclosed are compositions and methods for decreasing the viscosity and/or cohesiveness of and/or increasing the liquefaction of excessively or abnormally viscous or cohesive mucus or sputum. The composition contains a protein or peptide containing a thioredoxin monocysteinic active site in a reduced state and optionally further contains a reducing system.

Nucleic acids for the treatment of diseases are described, as are cells including such nucleic acids and methods of using both nucleic acids and cells. The nucleic acids include a thioredoxin-interacting protein (TXNIP) promoter and a gene that encodes a therapeutic protein or an interfering nucleic acid sequence (e.g., interfering RNA (iRNA sequence)).

Compositions and methods are provided for modulating the physiological activation of tissue transglutaminase (TG2); which methods can include inhibiting the activity of TG2 associated with inflammatory disorders, which disorders may include, without limitation, sepsis, ischemic reperfusion injury, renal fibrosis, and the like.

Nucleic acids for the treatment of diseases are described. The nucleic acids include a thioredoxin-interacting protein (TXNIP) promoter and a gene that encodes a therapeutic protein or an interfering nucleic acid sequence (e.g., interfering RNA (iRNA sequence)).

Provided is a composition for an external use skin preparation, containing thioredoxin, and more specifically, to a composition which contains thioredoxin thereby providing an overall improvement in skin condition such as a remarkable improvement in skin moisturization, reduction in a transepidermal water loss, sebum control, pore contraction, an improvement in skin color through blood circulation improvement, and the like.

Disclosed are compositions and methods for decreasing the viscosity and/or cohesiveness of and/or increasing the liquefaction of excessively or abnormally viscous or cohesive mucus or sputum. The composition contains a protein or peptide containing a thioredoxin monocysteinic active site in a reduced state and optionally further contains a reducing system.

Disclosed are compositions and methods for decreasing the viscosity and/or cohesiveness of and/or increasing the liquefaction of excessively or abnormally viscous or cohesive mucus or sputum. The composition contains a protein or peptide containing a thioredoxin monocysteinic active site in a reduced state and optionally further contains a reducing system.