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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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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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Weiner, S. (2003) · Reviews in Mineralogy and Geochemistry · doi:10.2113/0540001 · Cited by 1,022
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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
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Gill, I., & Ballesteros, A. (2000) · Trends in Biotechnology · doi:10.1016/s0167-7799(00)01457-8 · Cited by 463
Kuang, Z., Kim, S. N., Crookes-Goodson, W. J., Farmer, B. L., & Naik, R. R. (2010) · ACS Nano · doi:10.1021/nn901365g · Cited by 184
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Ingalls, A., & Pearson, A. (2005) · Oceanography · doi:10.5670/oceanog.2005.22 · Cited by 65
Marine chronology based on 14C dating on diatoms proteins
Hatté, C., Hodgins, G., Jull, A. J. T., Bishop, B., & Tesson, B. (2008) · Marine Chemistry · doi:10.1016/j.marchem.2007.12.008 · Cited by 30
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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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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