The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.
Biomimetic Synthesis and Characterization of Magnetic Proteins (Magnetoferritin)
Abstract
A new synthesis of the magnetic protein magnetoferritin is reported. Addition of increments of Fe(II) to anaerobic solutions of the demetalated protein, apoferritin, at pH = 8.6 and 65 °C, followed by stoichiometric amounts of the oxidant trimethylamine- N -oxide (Me 3 NO), results in the formation of a dispersed magnetic bioinorganic nanocomposite. By limiting the Fe:protein ratio to not more than ∼140 atoms/protein molecule and the Fe(II):Me 3 NO ratio to 3:2 in each increment, ferrimagnetic nanocrystals of magnetite/maghemite (Fe 3 O 4 )/(γ-Fe 2 O 3 ) are synthesized in the 8 nm diameter protein cage. Controlling the number of stepwise cycles of the Fe(II)/oxidant additions produces biomimetic proteins with different iron loadings (100, 260, 530, 1000, 2040, and 3150 Fe atoms/protein molecule) and concomitant changes in the size of the inorganic nanocores. Magnetoferritins prepared with less than 1000 Fe atoms/molecule were discrete nanocomposites with protein-encapsulated magnetic cores. Samples with higher iron loadings were aggregated on the TEM grid and showed a progressive increase in the number of cores with dimensions greater than the protein cavity. The temperature-dependent magnetic properties of magnetoferritins with different Fe loadings were studied by SQUID magnetometry. An approximately linear dependence of the superparamagnetic blocking temperature with iron loading was determined.
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Citations
Cites
Solving the structure of human H ferritin by genetically engineering intermolecular crystal contacts
Lawson, D. M., Artymiuk, P. J., Yewdall, S. J., Smith, J. M. A., Livingstone, J. C., Treffry, A., Luzzago, A., Levi, S., Arosio, P., Cesareni, G., et al. (1991) · Nature · doi:10.1038/349541a0 · Cited by 777
Identification of the ferroxidase centre in ferritin
Lawson, D. M., Treffry, A., Artymiuk, P. J., Harrison, P. M., Yewdall, S. J., Luzzago, A., Cesareni, G., Levi, S., & Arosio, P. (1989) · FEBS Letters · doi:10.1016/0014-5793(89)81040-3 · Cited by 312
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Laurent, S., Forge, D., Port, M., Roch, A., Robic, C., Vander Elst, L., & Muller, R. N. (2008) · Chemical Reviews · doi:10.1021/cr068445e · Cited by 6,852
Biological synthesis of metal nanoparticles by microbes
Narayanan, K. B., & Sakthivel, N. (2010) · Advances in Colloid and Interface Science · doi:10.1016/j.cis.2010.02.001 · Cited by 1,918
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Wahajuddin, & Arora (2012) · International Journal of Nanomedicine · doi:10.2147/ijn.s30320 · Cited by 1,117
Nanotechnology with Soft Materials
Hamley, I. W. (2003) · Angewandte Chemie International Edition · doi:10.1002/anie.200200546 · Cited by 914
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Böker, A., He, J., Emrick, T., & Russell, T. P. (2007) · Soft Matter · doi:10.1039/b706609k · Cited by 566
Metadata
- Authors
- Wong, K. K. W., Douglas, T., Gider, S., Awschalom, D. D., & Mann, S.
- Venue
- Chemistry of Materials
- Publisher
- American Chemical Society (ACS)
- Published
- 1998-01-19
- Volume
- 10
- Issue
- 1
- Pages
- 279-285
- ISSN
- 0897-4756 (ISSN-L)
- 1520-5002
- OpenAlex
- W2049203143
- Cited by
- 196
- References
- 2
- FWCI
- 2.42
- Type
- journal article
- Language
- en
- Open access
- closed
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