Kroeger, Nils and Deutzmann, Rainer and Sumper, Manfred (1999) Polycationic peptides from diatom biosilica that direct silica nanosphere formation. SCIENCE, 286 (5442). pp. 1129-1132. ISSN 0036-8075,
Full text not available from this repository. (Request a copy)Abstract
Diatom cell walls are regarded as a paradigm for controlled production of nanostructured silica, but the mechanisms allowing biosilicification to proceed at ambient temperature at high rates have remained enigmatic. A set of polycationic peptides (called silaffins) isolated from diatom cell walls were shown to generate networks of silica nanospheres within seconds when added to a solution of silicic acid. Silaffins contain covalently modified Lysine-Lysine elements. The first Lysine bears a polyamine consisting of 6 to 11 repeats of the N-methyl-propylamine unit. The second Lysine was identified as epsilon-N,N-dimethyl-lysine. These modifications drastically influence the silica-precipitating activity of silaffins.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CELL-WALLS; PROTEIN; MORPHOGENESIS; ACID; |
| Subjects: | 500 Science > 570 Life sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Biochemie, Genetik und Mikrobiologie > Alumni or Retired > Prof. Dr. Manfred Sumper |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 13 Dec 2022 06:50 |
| Last Modified: | 13 Dec 2022 06:50 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48847 |
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