characterization of a new protein family associated with the silica deposition vesicle membrane enables genetic manipulation of diatom silica
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2017
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Abstract
Abstract Diatoms are known for their intricate, silicified cell walls (frustules). Silica polymerization occurs in a compartment called the silica deposition vesicle (SDV) and it was proposed that the cytoskeleton influences silica patterning through the SDV membrane (silicalemma) via interactions with transmembrane proteins. In this work we identify a family of proteins associated with the silicalemma, named SAPs for Silicalemma Associated Proteins. The T. pseudonana SAPs (TpSAPs) are characterized by their motif organization; each contains a transmembrane domain, serine rich region and a conserved cytoplasmic domain. Fluorescent tagging demonstrated that two of the TpSAPs were localized to the silicalemma and that the intralumenal region of TpSAP3 remained embedded in the silica while the cytoplasmic region was cleaved. Knockdown lines of TpSAP1 and 3 displayed malformed valves; which confirmed their roles in frustule morphogenesis. This study provides the first demonstration of altering silica structure through manipulation of a single gene.
| Reference Key |
tesson2017scientificcharacterization
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| Authors | ;Benoit Tesson;Sarah J. L. Lerch;Mark Hildebrand |
| Journal | historia de la educación |
| Year | 2017 |
| DOI |
10.1038/s41598-017-13613-8
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