Alcohol dehydrogenases: gene multiplicity and differential functions of five classes of isozymes.

Alcohol dehydrogenases: gene multiplicity and differential functions of five classes of isozymes. Research Abstract Details 

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Alcohol dehydrogenases: gene multiplicity and differential functions of five classes of isozymes. Abstract Text:

R Holmes,

Mammalian alcohol dehydrogenases (ADHs) constitute an enzyme family of multiple forms (isozymes) which are differentially distributed throughout the body. Subunit types alpha, beta and gamma in dimeric combinations constitute the isozymes of human liver class I ADH, and are >94% homologous in structure. Human pi and chi subunits form homodimeric Class II and III ADH isozymes. pi-ADH is liver specific whereas chi-ADH is widely distributed throughout the body. A sixth human ADH subunit (designated mu or sigma), forming a new dimeric human stomach ADH, has been recently reported as Class IV ADH. Evidence for a seventh human ADH subunit has also been described, designated as Class V, the transcripts having been reported in the stomach and liver. All five classes of ADH represent isozymes which are homologous but exhibit at least 30% sequence differences in primary srtructure. Kinetic analyses of four of these classes of ADH indicated differential functions, serving either in the oxidative or reductive mode. Studies from various laboratories indicate the following respective functions: oxidation of aliphatic and aromatic alcohols-liver Class I and Class II, and stomach Class IV ADHs; reduction of peroxidic aldehydes-Classes I, II and IV; 'biogenic' alcohol oxidation-Classes I and II; and glutathione-dependent formaldehyde dehydrogenase-Class III.

Alcohol dehydrogenases: gene multiplicity and differential functions of five classes of isozymes. Publishing Authors By Initials

R Holmes,

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Alcohol dehydrogenases: gene multiplicity and differential functions of five classes of isozymes. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Drug and alcohol review

VOLUME: 12

Page Numbers: 99-110

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ISSN: 0959-5236

DAY: 4

MONTH: 07

YEAR: 1993

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LANGUAGE: eng

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Grant and Affiliation Information for Alcohol dehydrogenases: gene multiplicity and differential functions of five classes of isozymes.

AFFILIATION: Griffith University, Brisbane, Queensland, 4111, Australia.

Country: England

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MEDLINETA: Drug Alcohol Rev

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