The phhC gene of Pseudomonas aeruginosa encodes a protein which is a member of the Family I aminotransferases. At high expression levels in the heterologous Escherichia coli system, PhhC can compensate for the absence of AspC (which functions in L-aspartate biosynthesis) and TyrB (which functions in aromatic biosynthesis). In the native organism, PhhC is essential for catabolism of either L-tyr...

Aminotransferases and glutamate dehydrogenase are two main types of enzymes involved in the initial steps of amino acid catabolism, which plays a key role in the cheese flavor development. In the present work, glutamate dehydrogenase and aminotransferase activities were screened in twenty one strains of lactic acid bacteria of dairy interest, either cheese-isolated or commercial starters, inclu...

Increased aminotransferases often indicate hepatic injury but are also increased with damage to heart and muscle (1 ). Testing for creatine kinase is helpful, especially when the ratio of aspartate aminotransferase to alanine aminotransferase is 3:1, a value uncommon with liver injury. In acute liver injury the aspartate aminotransferase/alanine aminotransferase ratio is usually 2:1. When measu...

Montelukast is a selective and competitive cysteinyl leukotriene receptor antagonist (CystLTRA) which is increasingly used for the treatment of allergic asthma. Recently, hepatotoxicity has been reported with this drug in adult patients, but only one letter to the editor has reported a case of probable montelukast-induced hepatotoxicity in a child. We present a case of a 3.5-year-old boy, recei...

The authors present a case of Kikuchi's disease associated with systemic lupus erythematosus (SLE) and autoimmune-like hepatitis. Kikuchi's disease, or histiocytic necrotizing lymphadenitis is occasionally associated with SLE and mildly elevated aminotransferases. A 17-year old woman presented with fever, arthritis and bilateral cervical adenopathy. Histopathological and immunohistochemical exa...

Organelles in spinach leaves were isolated in sucrose gradients by isopycnic centrifugation. The peroxisomal fraction was the only cellular site for two different and irreversible aminotransferases which utilized glyoxylate as the amino acceptor in the formation of glycine. These were a serine:glyoxylate aminotransferase with a specific activity of 1.54 pmoles X min-1 X mg-1 peroxisomal protein...

In the chloroplasts and in non-green plastids of plants, aspartate is the precursor for the biosynthesis of different amino acids and derived metabolites that play distinct and important roles in plant growth, reproduction, development or defence. Aspartate biosynthesis is mediated by the enzyme aspartate aminotransferase (EC 2.6.1.1), which catalyses the reversible transamination between gluta...

Hepatic injury is associated with distortion of the metabolic function. Hepatic disease can be evaluated by biochemical analysis of the serum tests, includes levels of serum Alanine and Aspartate aminotransferases, alkaline phosphatase, and others. The present study was conducted to assay Liver associated enzymes on patients with Viral Hepatitis, Alcoholic hepatitis and Chronic hepatitis and to...

T he medical community has been alerted by case reports of serious liver injury associated with sitaxentan, an endothelin receptor antagonist (ERA) used for the treatment of pulmonary arterial hypertension (PAH). The first of these case reports was published in the June issue of the European Respiratory Journal and described a patient with PAH who was initially treated with bosentan, another ER...