Linked Life Data

11042094

Source:http://linkedlifedata.com/resource/pubmed/id/11042094

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2000-12-4
pubmed:abstractText
The flavin-containing monooxygenases (FMOs) are a family of xenobiotic-metabolizing enzymes that are expressed in a species- and tissue-specific manner. FMO2 expression has been observed in pulmonary tissue from several species, but not human. Two human FMO2 point mutations have been reported: a cytosine to thymidine transition at position 1414 resulting in a premature stop codon and a thymidine insertion at position 1589 resulting in a frameshift. To define the frequency of these sequence variations and explore their significance, unrelated African-American, Caucasian, and Korean individuals were genotyped. In the African-American population tested (n = 180), the 1414C allele occurred at a 13% frequency; however, all of the tested Caucasians (n = 52) and Koreans (n = 100) were homozygous for the 1414T allele. The T1589 allele occurred at frequencies of 6.9 and 13.0% in African-Americans (n = 175) and Caucasians (n = 23), respectively, and appears to segregate with the 1414T allele. Thus, it would have no further impact on FMO2 activity. Western blot analysis of pulmonary microsomes failed to detect immunoreactive protein in 1414T homozygotes. A heterozygotic individual did exhibit a single band of the expected size, but no detectable FMO activity in the corresponding lung microsomes. Sequence analysis, however, was consistent with the 1414C allele encoding an active FMO2 enzyme. FMO2 mRNA expression was observed in most individuals, but failed to correlate with genotype or protein expression. In summary, functional FMO2 is expressed in only a small percentage of the overall population. However, in certain ethnic groups, active pulmonary FMO2 enzyme will be present in a significant number of individuals.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0041-008X
pubmed:author
pubmed:copyrightInfo
Copyright 2000 Academic Press.
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
168
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
216-24
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
Ethnic differences in human flavin-containing monooxygenase 2 (FMO2) polymorphisms: detection of expressed protein in African-Americans.
pubmed:affiliation
Departments of Pharmacology and Clinical Pharmacology, Wayne State University, Detroit, Michigan, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't