Identification and genetic mapping of the structural gene for an essential Escherichia coli membrane protein.
AUTOR(ES)
Williams, M G
RESUMO
Attempts to isolate conditionally lethal recB and recC mutations of Escherichia coli K-12 by P1 localized mutagenesis led to the identification of the structural gene for an essential membrane protein. Located on a 1.5-kilobase-pair DNA fragment which physically mapped immediately 5' to the thyA gene, the product of the umpA (unidentified membrane protein) gene is a 25,000 Mr membrane-associated polypeptide. These results provide an explanation for why several research groups have been unable to obtain chromosomal deletions of the entire thyA gene. A possible interaction between the umpA and thyA genes is also discussed.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=209623Documentos Relacionados
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