Keith F. Tipton

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This review represents an update of the nomenclature system for the UDP glucuronosyltransferase gene superfamily, which is based on divergent evolution. Since the previous review in 1991, sequences of many related UDP glycosyltransferases from lower organisms have appeared in the database, which expand our database considerably. At latest count, in animals,(More)
Monoamine oxidase inhibitors were among the first antidepressants to be discovered and have long been used as such. It now seems that many of these agents might have therapeutic value in several common neurodegenerative conditions, independently of their inhibition of monoamine oxidase activity. However, many claims and some counter-claims have been made(More)
As currently being performed with an increasing number of superfamilies, a standardized gene nomenclature system is proposed here, based on divergent evolution, using multiple alignment analysis of all 86 eukaryotic aldehyde dehydrogenase (ALDH) amino-acid sequences known at this time. The ALDHs represent a superfamily of NAD(P)(+)-dependent enzymes having(More)
The semicarbazide-sensitive amine oxidases (SSAO) (EC were believed to be detoxifying enzymes, primarily involved in the oxidative deamination of endogenous amines, such as methylamine and aminoacetone, together with some xenobiotic amines. However, it appears that the reaction products may have important signalling functions in the regulation of(More)
889 *A list of affiliations appears at the end of the paper. e-mail:, or overlaps in scope and arbitrary decisions on wording and substructuring inhibit their use in combination. These issues present difficulties for checklist users, especially those who routinely combine information from several(More)
N-Chlorotaurine (taurine chloramine), formed by treating taurine with hypochlorous acid, was shown to decompose to sulphoacetaldehyde with a first-order rate constant of 9.9+/-0.5 x 10(-4).h-1 at 37 degrees C in 0.1 M phosphate buffer, pH 7.4. Rat liver homogenates accelerated this decay in a process that was proportional to tissue-protein concentration and(More)
A great deal has been learned about the behaviour of monoamine oxidase in the 75 years since it was first discovered, but there is still a great deal left to understand. This review concentrates on the dynamic aspects of our knowledge of the interactions of MAO with substrates and inhibitors and how it may collaborate with other enzymes, with particular(More)
Monoamine oxidase catalyzes the oxidative deamination of primary aliphatic and aromatic amines and some secondary and tertiary amines, including the hormone and neurotransmitter amines epinephrine, dopamine, norepinephrine and serotonin. The two isoenzymes, MAO-A and MAO-B, differ according to substrate and inhibitor specificities. For example, selective(More)
IntEnz is the name for the Integrated relational Enzyme database and is the official version of the Enzyme Nomenclature. The Enzyme Nomenclature comprises recommendations of the Nomenclature Committee of the International Union of Bio chemistry and Molecular Biology (NC-IUBMB) on the nomenclature and classification of enzyme-catalysed reactions. IntEnz is(More)