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Polycationic Peptides from Diatom Biosilica That Direct Silica Nanosphere Formation
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 ɛ - N,N -dimethyl- lysine. These modifications drastically influence the silica-precipitating activity of silaffins.
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Cites
Measurement of protein using bicinchoninic acid
Smith, P. K., Krohn, R. I., Hermanson, G. T., Mallia, A. K., Gartner, F. H., Provenzano, M. D., Fujimoto, E. K., Goeke, N. M., Olson, B. J., & Klenk, D. C. (1985) · Analytical Biochemistry · doi:10.1016/0003-2697(85)90442-7 · Cited by 18,482
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Controlling Mineral Morphologies and Structures in Biological and Synthetic Systems
Meldrum, F. C., & Cölfen, H. (2008) · Chemical Reviews · doi:10.1021/cr8002856 · Cited by 1,397
Gower, L. B. (2008) · Chemical Reviews · doi:10.1021/cr800443h · Cited by 1,086
An Overview of Biomineralization Processes and the Problem of the Vital Effect
Weiner, S. (2003) · Reviews in Mineralogy and Geochemistry · doi:10.2113/0540001 · Cited by 1,022
Overview of microalgal extracellular polymeric substances (EPS) and their applications
Xiao, R., & Zheng, Y. (2016) · Biotechnology Advances · doi:10.1016/j.biotechadv.2016.08.004 · Cited by 938
Reffitt, D. M., Ogston, N., Jugdaohsingh, R., Cheung, H. F. J., Evans, B. A. J., Thompson, R. P. H., Powell, J. J., & Hampson, G. N. (2003) · Bone · doi:10.1016/s8756-3282(02)00950-x · Cited by 876
Metadata
- Authors
- Kröger, N., Deutzmann, R., & Sumper, M.
- Venue
- Science
- Published
- 1999-11-05
- Volume
- 286
- Issue
- 5442
- Pages
- 1129-1132
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2083129881
- Cited by
- 1,409
- References
- 1
- FWCI
- 25.95
- Type
- journal article
- Language
- en
- Open access
- closed
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- Kröger, N., Deutzmann, R., & Sumper, M. (1999). Polycationic Peptides from Diatom Biosilica That Direct Silica Nanosphere Formation. Science. https://doi.org/10.1126/science.286.5442.1129
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
