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  Lattice distortions in coccolith calcite crystals originate from occlusion of biomacromolecules

Hood, M. A., Leemreize, H., Scheffel, A., & Faivre, D. (2016). Lattice distortions in coccolith calcite crystals originate from occlusion of biomacromolecules. Journal of Structural Biology, 196(2), 147-154. doi:10.1016/j.jsb.2016.09.010.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002B-7830-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-05F7-7
Genre: Journal Article

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 Creators:
Hood, Matthew A.1, Author              
Leemreize, Hanna2, Author              
Scheffel, André, Author
Faivre, Damien1, Author              
Affiliations:
1Damien Faivre, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863290              
2Yael Politi, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863297              

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Free keywords: Biomineralization; Coccoliths; Calcium carbonate; High-resolution X-ray diffraction; Biogenic crystal growth
 Abstract: During biomineralization, organisms control the formation and morphology of a mineral using biomacromolecules. The biomacromolecules that most strongly interact with the growing crystals frequently get occluded within. Such an observation has been recently obtained for the calcium carbonate producing coccolithophore species Pleurochrysis carterae. Coccolithophores are unicellular algae that produce calcified scales built from complex-shaped calcite crystals, termed coccoliths. It is unclear how widespread the phenomenon of biomacromolecular occlusion within calcite crystals is in calcifying haptophytes such as coccolithophores. Here, the coccoliths of biological replicates of the bloom forming Emiliania huxleyi are compared with that of Pleurochrysis carterae, two species with different coccolith morphologies and crystal growth mechanisms. From high-resolution synchrotron X-ray diffraction, changes in the lattice parameters of coccolith calcite, after heating to 450 °C, are observed and associated with macrostrain originating from occluded biomacromolecules. We propose a mechanism governing the biomacromolecules’ interaction with the growing coccolith crystals and their likely origin.

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 Dates: 2016-09-162016
 Publication Status: Published in print
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 Identifiers: DOI: 10.1016/j.jsb.2016.09.010
BibTex Citekey: Hood2016
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Title: Journal of Structural Biology
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier
Pages: - Volume / Issue: 196 (2) Sequence Number: - Start / End Page: 147 - 154 Identifier: ISSN: 1047-8477