Linked Life Data

8968070

Source:http://linkedlifedata.com/resource/pubmed/id/8968070

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
1997-1-27
pubmed:abstractText
The three-dimensional structure of the product of the reaction of a diol epoxide of the carcinogen 5-methylchrysene with methanol has been determined by an X-ray diffraction analysis. The diol epoxide used to obtain this compound contains a stereochemically hindered bay region because of the location of the 5-methyl group, and this might be expected to affect the type of chemical reaction that occurs. The crystal structure analysis of this adduct of a polycyclic aromatic hydrocarbon (PAH) showed that a methoxy group has been added at the carbon atom of the epoxy group that is nearest to the aromatic system. The bond that is formed is axial to the ring system so that the carbon and hydrogen atoms of the methoxy group are considerably displaced from the PAH ring plane. The bay-region methyl group at position 5 is displaced out of the ring plane in the opposite direction. The major steric distortion in this methanol adduct is shown, by a comparison with crystal structures of related non-methylated compounds, to be in the area of the 5-methyl group and not in the tetrol-bearing ring. The steric effects that caused the axial conformation of the newly formed bond would also be expected to pertain in the DNA adduct of a PAH with a bay-region methyl group. Since the presence of the bay-region methyl group in 5-methylchrysene has been shown to enhance the carcinogenicity of this PAH over the parent compound or compounds with methyl groups in other positions of the molecule, it might be anticipated that this axial bond is found in carcinogenic lesions in DNA, and that any factor that ensures this axial conformation may accentuate the carcinogenic potential of a PAH of the appropriate size.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0143-3334
pubmed:author
pubmed:issnType
Print
pubmed:volume
17
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2507-11
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Bay-region distortions in a methanol adduct of a bay-region diol epoxide of the carcinogen 5-methylchrysene.
pubmed:affiliation
The Institute for Cancer Research, Fox Chase Cancer Center, Philadelphia, PA 19111, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't