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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Wurst, H. Pohl, F. M. |
| Description | Author Affiliation: Wurst H ( Fakultät für Biologie, Universität Konstanz, Federal Republic of Germany.); |
| Abstract | A method is presented that allows simultaneous analysis of the effects of all possible point mutations within a specific mutation window of at least 50 base pairs on a DNA fragment that codes for a selectable function. It relies on the detection of mismatched base pairs with hydroxylamine and osmium tetroxide. A mutant plasmid library of randomly distributed point mutations within the lacZ' gene of Escherichia coli was selected for functional alpha-complementation by growth on lactose. The DNA fragments of the selected and unselected library were each heat denatured and again renatured, thereby generating a randomly distributed set of all possible mismatches within the mutagenesis window. Cytidine-containing mismatches were then detected with hydroxylamine, and thymidine-containing mismatches were detected with osmium tetroxide. When this procedure was performed for both DNA strands, all mismatches could be detected. A comparison of the results of the unselected and selected library leads to an estimation of the effects of each detectable mutation on alpha-complementation in vivo. This method, called 'mutant profiling,' should be applicable to all selectable genetic elements. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 22 |
| Volume Number | 88 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1991-12-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Escherichia Coli Genetics Mutagenesis, Site-Directed Mutation Amino Acid Sequence Base Composition DNA, Bacterial Isolation & Purification Drug Effects Enzymology Gene Library Genetic Complementation Test Hydroxylamine Hydroxylamines Pharmacology Molecular Sequence Data Nucleic Acid Heteroduplexes Oligodeoxyribonucleotides Osmium Tetroxide Plasmids Restriction Mapping Transformation, Bacterial Beta-Galactosidase Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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