دورية أكاديمية
Protein sequences bound to mineral surfaces persist into deep time
| العنوان: | Protein sequences bound to mineral surfaces persist into deep time |
|---|---|
| المؤلفون: | Demarchi, Beatrice, Ecker, Michaela, Kolska Horwitz, Liora, Chazan, Michael, Kröger, Roland, Thomas-Oates, Jane, Harding, John H, Cappellini, Enrico, Penkman, Kirsty, Collins, Matthew J |
| المصدر: | ELife ; https://dx.doi.org/10.7554/eLife.17092Test ; 5 ; 4 ; 174 - 177 |
| بيانات النشر: | Faculty of Science Department of Archaeology |
| سنة النشر: | 2016 |
| المجموعة: | University of Cape Town: OpenUCT |
| مصطلحات موضوعية: | Struthio camelus, biochemistry, biomineralization, eggshell, evolutionary biology, genomics, molecular dynamics, paleontology, paleoproteomics |
| الوصف: | Proteins persist longer in the fossil record than DNA, but the longevity, survival mechanisms and substrates remain contested. Here, we demonstrate the role of mineral binding in preserving the protein sequence in ostrich (Struthionidae) eggshell, including from the palaeontological sites of Laetoli (3.8 Ma) and Olduvai Gorge (1.3 Ma) in Tanzania. By tracking protein diagenesis back in time we find consistent patterns of preservation, demonstrating authenticity of the surviving sequences. Molecular dynamics simulations of struthiocalcin-1 and -2, the dominant proteins within the eggshell, reveal that distinct domains bind to the mineral surface. It is the domain with the strongest calculated binding energy to the calcite surface that is selectively preserved. Thermal age calculations demonstrate that the Laetoli and Olduvai peptides are 50 times older than any previously authenticated sequence (equivalent to ~16 Ma at a constant 10°C). |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | http://hdl.handle.net/11427/34416Test; https://open.uct.ac.za/bitstream/11427/34416/1/DemarchiBeatrice_Protein_sequenc_2016.pdfTest |
| الإتاحة: | https://doi.org/10.7554/eLife.17092Test http://hdl.handle.net/11427/34416Test https://open.uct.ac.za/bitstream/11427/34416/1/DemarchiBeatrice_Protein_sequenc_2016.pdfTest |
| رقم الانضمام: | edsbas.FE360ADE |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |