Biomaterial Database

Identification of thiol:protein disulfide oxidoreductase activity in cultured human fibroblasts: dependence of enzyme activity on growth conditions. 1983

J E Morin, and J E Dixon, and P P Chang, and J Moss

Thiol:protein disulfide oxidoreductase activity was assayed in extracts of cultured normal human skin fibroblasts. Enzyme activity in confluent fibroblasts was dependent on growth conditions. In serum-deprived fibroblasts grown in minimal medium enzyme activity was approximately 40% of that observed in fibroblasts maintained in medium supplemented with 10% fetal calf serum. In fibroblasts cultured in medium supplemented only with insulin, activity was 35% greater than that in fibroblasts cultured in unsupplemented defined medium. Antibodies raised against purified bovine liver thiol:protein disulfide oxidoreductase immunoprecipitated all of the activity present in fibroblast extracts. The thiol:protein disulfide oxidoreductase from human fibroblasts thus appears to share antigenic determinants with the bovine liver enzyme. The human fibroblast may serve as an in vitro model to study the regulation of the oxidoreductase.

UI	MeSH Term	Description	Entries
D007328	Insulin	A 51-amino acid pancreatic hormone that plays a major role in the regulation of glucose metabolism, directly by suppressing endogenous glucose production (GLYCOGENOLYSIS; GLUCONEOGENESIS) and indirectly by suppressing GLUCAGON secretion and LIPOLYSIS. Native insulin is a globular protein comprised of a zinc-coordinated hexamer. Each insulin monomer containing two chains, A (21 residues) and B (30 residues), linked by two disulfide bonds. Insulin is used as a drug to control insulin-dependent diabetes mellitus (DIABETES MELLITUS, TYPE 1).	Iletin,Insulin A Chain,Insulin B Chain,Insulin, Regular,Novolin,Sodium Insulin,Soluble Insulin,Chain, Insulin B,Insulin, Sodium,Insulin, Soluble,Regular Insulin
D008565	Membrane Proteins	Proteins which are found in membranes including cellular and intracellular membranes. They consist of two types, peripheral and integral proteins. They include most membrane-associated enzymes, antigenic proteins, transport proteins, and drug, hormone, and lectin receptors.	Cell Membrane Protein,Cell Membrane Proteins,Cell Surface Protein,Cell Surface Proteins,Integral Membrane Proteins,Membrane-Associated Protein,Surface Protein,Surface Proteins,Integral Membrane Protein,Membrane Protein,Membrane-Associated Proteins,Membrane Associated Protein,Membrane Associated Proteins,Membrane Protein, Cell,Membrane Protein, Integral,Membrane Proteins, Integral,Protein, Cell Membrane,Protein, Cell Surface,Protein, Integral Membrane,Protein, Membrane,Protein, Membrane-Associated,Protein, Surface,Proteins, Cell Membrane,Proteins, Cell Surface,Proteins, Integral Membrane,Proteins, Membrane,Proteins, Membrane-Associated,Proteins, Surface,Surface Protein, Cell
D010088	Oxidoreductases	The class of all enzymes catalyzing oxidoreduction reactions. The substrate that is oxidized is regarded as a hydrogen donor. The systematic name is based on donor:acceptor oxidoreductase. The recommended name will be dehydrogenase, wherever this is possible; as an alternative, reductase can be used. Oxidase is only used in cases where O2 is the acceptor. (Enzyme Nomenclature, 1992, p9)	Dehydrogenases,Oxidases,Oxidoreductase,Reductases,Dehydrogenase,Oxidase,Reductase
D011490	Protein Disulfide Reductase (Glutathione)	An enzyme that catalyzes the reduction of a protein-disulfide in the presence of glutathione, forming a protein-dithiol. Insulin is one of its substrates. EC 1.8.4.2.	Glutathione Insulin Transhydrogenase,Glutathione Protein Disulfide Oxidoreductase,Thiol-Disulfide Oxidoreductase,Thiol-Protein Disulfide Oxidoreductase,Disulfide Oxidoreductase, Thiol-Protein,Insulin Transhydrogenase, Glutathione,Oxidoreductase, Thiol-Disulfide,Oxidoreductase, Thiol-Protein Disulfide,Thiol Disulfide Oxidoreductase,Thiol Protein Disulfide Oxidoreductase,Transhydrogenase, Glutathione Insulin
D001769	Blood	The body fluid that circulates in the vascular system (BLOOD VESSELS). Whole blood includes PLASMA and BLOOD CELLS.
D002478	Cells, Cultured	Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others.	Cultured Cells,Cell, Cultured,Cultured Cell
D003470	Culture Media	Any liquid or solid preparation made specifically for the growth, storage, or transport of microorganisms or other types of cells. The variety of media that exist allow for the culturing of specific microorganisms and cell types, such as differential media, selective media, test media, and defined media. Solid media consist of liquid media that have been solidified with an agent such as AGAR or GELATIN.	Media, Culture
D005347	Fibroblasts	Connective tissue cells which secrete an extracellular matrix rich in collagen and other macromolecules.	Fibroblast
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012867	Skin	The outer covering of the body that protects it from the environment. It is composed of the DERMIS and the EPIDERMIS.