Kornilova, S. V. and Kapinos Schneider, Larisa E. E and Blagoĭ, Iu. P.. (1995) Izuchenie vzaimodeĭstviia DNK s ionami kal'tsiia metodom kolebatel'noĭ spektroskopii. Molekulyarnaya Biologiya, 29 (3). pp. 574-584.
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Abstract
DNA complexes with Ca2+ ions formed in films at various relative humidities were studied by IR-spectroscopy for molar concentration ratio of calcium ions and DNA phosphate groups [Ca2+]/[P] = 0.4-20. It is shown that the transition of DNA complexed with Ca2+ ions into B-form occurs at higher average numbers (n) of water molecules absorbed per nucleotide: n > 18 at the ratio [Ca2+]/[P] = 10, n > 24 at [Ca2+]/[P] = 20 and n > 12 in the absence of Ca2+ ions. This shows stronger binding of water molecules in the hydrate shell of DNA-Ca2+ if compared with free DNA. The results confirm a model proposed earlier. Ca2+ ions interact with phosphate oxygens of DNA and with N(7) nitrogens of guanine forming chelated complexes.
| Faculties and Departments: | 05 Faculty of Science > Departement Biozentrum > Structural Biology & Biophysics > Nanobiology Argovia (Lim) |
|---|---|
| UniBasel Contributors: | Kapinos Schneider, Larisa E. E |
| Item Type: | Article, refereed |
| Article Subtype: | Research Article |
| Publisher: | Izdatel'stvo Nauka |
| ISSN: | 0026-8984 |
| Note: | Publication type according to Uni Basel Research Database: Journal article |
| Identification Number: |
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| Last Modified: | 10 Nov 2017 10:37 |
| Deposited On: | 10 Nov 2017 10:37 |
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