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Rennekamp B, Karfusehr C, Kurth M, Ünal A, Monego D, Riedmiller K, Gryn'ova G, Hudson DM, Gräter F. Collagen breaks at weak sacrificial bonds taming its mechanoradicals. Nat Commun 2023; 14:2075. [PMID: 37045839 PMCID: PMC10097693 DOI: 10.1038/s41467-023-37726-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Accepted: 03/29/2023] [Indexed: 04/14/2023] Open
Abstract
Collagen is a force-bearing, hierarchical structural protein important to all connective tissue. In tendon collagen, high load even below macroscopic failure level creates mechanoradicals by homolytic bond scission, similar to polymers. The location and type of initial rupture sites critically decide on both the mechanical and chemical impact of these micro-ruptures on the tissue, but are yet to be explored. We here use scale-bridging simulations supported by gel electrophoresis and mass spectrometry to determine breakage points in collagen. We find collagen crosslinks, as opposed to the backbone, to harbor the weakest bonds, with one particular bond in trivalent crosslinks as the most dominant rupture site. We identify this bond as sacrificial, rupturing prior to other bonds while maintaining the material's integrity. Also, collagen's weak bonds funnel ruptures such that the potentially harmful mechanoradicals are readily stabilized. Our results suggest this unique failure mode of collagen to be tailored towards combatting an early onset of macroscopic failure and material ageing.
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Affiliation(s)
- Benedikt Rennekamp
- Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, 69118, Heidelberg, Germany
- Interdisciplinary Center for Scientific Computing, Heidelberg University, INF 205, 69120, Heidelberg, Germany
- Max Planck School Matter to Life, Jahnstrasse 29, 69120, Heidelberg, Germany
| | - Christoph Karfusehr
- Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, 69118, Heidelberg, Germany
- Max Planck School Matter to Life, Jahnstrasse 29, 69120, Heidelberg, Germany
- Physics Department and ZNN, Technical University Munich, Coulombwall 4a, 85748, Garching, Germany
| | - Markus Kurth
- Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, 69118, Heidelberg, Germany
- Interdisciplinary Center for Scientific Computing, Heidelberg University, INF 205, 69120, Heidelberg, Germany
| | - Aysecan Ünal
- Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, 69118, Heidelberg, Germany
- Interdisciplinary Center for Scientific Computing, Heidelberg University, INF 205, 69120, Heidelberg, Germany
- Max Planck School Matter to Life, Jahnstrasse 29, 69120, Heidelberg, Germany
| | - Debora Monego
- Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, 69118, Heidelberg, Germany
| | - Kai Riedmiller
- Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, 69118, Heidelberg, Germany
| | - Ganna Gryn'ova
- Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, 69118, Heidelberg, Germany
- Interdisciplinary Center for Scientific Computing, Heidelberg University, INF 205, 69120, Heidelberg, Germany
| | - David M Hudson
- Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, WA, 98195, USA
| | - Frauke Gräter
- Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, 69118, Heidelberg, Germany.
- Interdisciplinary Center for Scientific Computing, Heidelberg University, INF 205, 69120, Heidelberg, Germany.
- Max Planck School Matter to Life, Jahnstrasse 29, 69120, Heidelberg, Germany.
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Nikalaichuk V, Hileuskaya K, Kraskouski A, Kulikouskaya V, Nedved H, Kalatskaja J, Rybinskaya E, Herasimovich K, Laman N, Agabekov V. Chitosan‐hydroxycinnamic
acid conjugates: Synthesis, photostability and phytotoxicity to seed germination of barley. J Appl Polym Sci 2022. [DOI: 10.1002/app.51884] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Viktoryia Nikalaichuk
- Institute of Chemistry of New Materials National Academy of Sciences of Belarus Minsk Republic of Belarus
| | - Kseniya Hileuskaya
- Institute of Chemistry of New Materials National Academy of Sciences of Belarus Minsk Republic of Belarus
| | - Aliaksandr Kraskouski
- Institute of Chemistry of New Materials National Academy of Sciences of Belarus Minsk Republic of Belarus
| | - Viktoryia Kulikouskaya
- Institute of Chemistry of New Materials National Academy of Sciences of Belarus Minsk Republic of Belarus
| | - Helen Nedved
- V.F. Kuprevich Institute of Experimental Botany National Academy of Sciences of Belarus Minsk Republic of Belarus
| | - Joanna Kalatskaja
- V.F. Kuprevich Institute of Experimental Botany National Academy of Sciences of Belarus Minsk Republic of Belarus
| | - Ekaterina Rybinskaya
- V.F. Kuprevich Institute of Experimental Botany National Academy of Sciences of Belarus Minsk Republic of Belarus
| | - Kanstantsin Herasimovich
- V.F. Kuprevich Institute of Experimental Botany National Academy of Sciences of Belarus Minsk Republic of Belarus
| | - Nikolai Laman
- V.F. Kuprevich Institute of Experimental Botany National Academy of Sciences of Belarus Minsk Republic of Belarus
| | - Vladimir Agabekov
- Institute of Chemistry of New Materials National Academy of Sciences of Belarus Minsk Republic of Belarus
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Jariashvili K, Madhan B, Brodsky B, Kuchava A, Namicheishvili L, Metreveli N. UV damage of collagen: insights from model collagen peptides. Biopolymers 2012; 97:189-98. [PMID: 22002434 PMCID: PMC3299808 DOI: 10.1002/bip.21725] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Revised: 09/13/2011] [Accepted: 09/14/2011] [Indexed: 11/11/2022]
Abstract
Fibrils of Type I collagen in the skin are exposed to ultraviolet (UV) light and there have been claims that collagen photo-degradation leads to wrinkles and may contribute to skin cancers. To understand the effects of UV radiation on collagen, Type I collagen solutions were exposed to the UV-C wavelength of 254 nm for defined lengths of time at 4°C. Circular dichroism (CD) experiments show that irradiation of collagen leads to high loss of triple helical content with a new lower thermal stability peak and SDS-gel electrophoresis indicates breakdown of collagen chains. To better define the effects of UV radiation on the collagen triple-helix, the studies were extended to peptides which model the collagen sequence and conformation. CD studies showed irradiation for days led to lower magnitudes of the triple-helix maximum at 225 nm and lower thermal stabilities for two peptides containing multiple Gly-Pro-Hyp triplets. In contrast, the highest radiation exposure led to little change in the T(m) values of (Gly-Pro-Pro)(10) and (Ala-Hyp-Gly)(10) , although (Gly-Pro-Pro)(10) did show a significant decrease in triple helix intensity. Mass spectroscopy indicated preferential cleavage sites within the peptides, and identification of some of the most susceptible sites of cleavage. The effect of radiation on these well defined peptides gives insight into the sequence and conformational specificity of photo-degradation of collagen.
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Affiliation(s)
- Ketevan Jariashvili
- Institute of Applied Physics, Ilia State University, 3/5 Kakutsa Cholokashvili Ave., Tbilisi 0162, Georgia
| | - Balaraman Madhan
- Central Leather Research Institute, Council of Scientific & Industrial Research, Adyar, Chennai-20, India
| | - Barbara Brodsky
- Department of Biomedical Engineering, Tufts University, Medford, MA 02155
| | - Ana Kuchava
- Institute of Applied Physics, Ilia State University, 3/5 Kakutsa Cholokashvili Ave., Tbilisi 0162, Georgia
| | - Louisa Namicheishvili
- Institute of Applied Physics, Ilia State University, 3/5 Kakutsa Cholokashvili Ave., Tbilisi 0162, Georgia
| | - Nunu Metreveli
- Institute of Applied Physics, Ilia State University, 3/5 Kakutsa Cholokashvili Ave., Tbilisi 0162, Georgia
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Metreveli NO, Jariashvili KK, Namicheishvili LO, Svintradze DV, Chikvaidze EN, Sionkowska A, Skopinska J. UV-vis and FT-IR spectra of ultraviolet irradiated collagen in the presence of antioxidant ascorbic acid. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2010; 73:448-55. [PMID: 20036425 DOI: 10.1016/j.ecoenv.2009.12.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2008] [Revised: 12/02/2009] [Accepted: 12/03/2009] [Indexed: 05/03/2023]
Abstract
The influence of deleterious UV radiation on collagen molecules in the absence and presence of ascorbic acid using UV-vis and FT-IR spectroscopy has been studied. Intensity of UV-vis absorption spectrum of collagen with a maximum at 275 m due to the aromatic residues (tyrosine and phenylalanine) increases with the increasing dose of UV radiation. This effect is significantly hindered in the presence of antioxidant ascorbic acid. Intensities of FT-IR bands (amide A, B, I and II) of collagen decrease with the increase of the UV radiation dosage. Intensities of bands are also decreased in the presence of ascorbic acid. Results suggest that increasing the concentration of ascorbic acid increases the photo-stability of collagen, and the collagen becomes less sensitive to UV radiation. It is possible that hydrogen bonds form between the groups N-H of collagen and C=O of ascorbic acid. It is believed that under UV radiation free radicals appear in acid soluble collagen and resulting in photodegradation of the macromolecule restore due to the ability of ascorbic acid donating one or two electrons. Increasing the dose of radiation causes more molecules of ascorbic acid to slow down, and their antioxidant effect is diminished accordingly.
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Affiliation(s)
- Nunu O Metreveli
- Faculty of Physics and Mathematics, Ilia Chavchavadze State University, Chavchavadze Ave. 32, 0179 Tbilisi, Georgia
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