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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Yang, S. W. Nash, H. A. |
| Description | Author Affiliation: Yang SW ( Laboratory of Molecular Biology, National Institute of Mental Health, Bethesda, MD 20892-4034.); |
| Abstract | Azide moieties have been specifically placed in the backbone of DNA by chemical coupling between azidophenacyl bromide and uniquely positioned phosphorothioate residues. The derivatized DNA forms specific complexes with a DNA-binding protein and, following irradiation with 302-nm light, makes specific crosslinks to the protein. Isolation of this covalent complex, followed by tryptic digestion and Edman degradation of the resulting crosslinked peptide, identifies the portion of the protein that is near the derivatized segment of the target DNA. We use this method to probe the interaction between a specific DNA sequence and integration host factor (IHF) protein. A single IHF heterodimer is known to contact > 25 bp of DNA and thereby introduce a sharp bend. Two segments of a typical IHF site were derivatized with aryl azide. Although the segments were separated by only 5 bp, they crosslinked to different subunits of IHF. The locations of the crosslinks support our current view for the way IHF protein binds to and bends its specific targets. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 25 |
| Volume Number | 91 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1994-01-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Bacterial Proteins Chemistry Cross-Linking Reagents DNA-Binding Proteins DNA Nucleic Acid Conformation Oligodeoxyribonucleotides Protein Structure, Secondary Amino Acid Sequence Azides Isolation & Purification Metabolism Binding Sites Integration Host Factors Models, Molecular Molecular Sequence Data Peptide Fragments Thionucleotides Trypsin Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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