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Research Article
Molecular and ultrastructural studies of a fibrillar collagen from octocoral (Cnidaria)
Joseph P. R. O. Orgel, Ido Sella, Rama S. Madhurapantula, Olga Antipova, Yael Mandelberg, Yoel Kashman, Dafna Benayahu, Yehuda Benayahu
Journal of Experimental Biology 2017 : jeb.163824 doi: 10.1242/jeb.163824 Published 13 July 2017
Joseph P. R. O. Orgel
Departments of Biology, Physics and Biomedical Engineering, Illinois Institute of Technology, 3440 S. Dearborn Ave, Chicago, IL 60616, USAPritzker Institute of Biomedical Science and Engineering, Illinois Institute of Technology 3440 S. Dearborn Ave, Chicago, IL 60616, USABioCAT, Advanced Photon Source, Argonne National Laboratory, IL, USA
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  • ORCID record for Joseph P. R. O. Orgel
  • For correspondence: orgel@iit.eduYehudaB@tauex.tau.ac.il
Ido Sella
School of Zoology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel
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Rama S. Madhurapantula
Pritzker Institute of Biomedical Science and Engineering, Illinois Institute of Technology 3440 S. Dearborn Ave, Chicago, IL 60616, USA
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Olga Antipova
Pritzker Institute of Biomedical Science and Engineering, Illinois Institute of Technology 3440 S. Dearborn Ave, Chicago, IL 60616, USABioCAT, Advanced Photon Source, Argonne National Laboratory, IL, USA
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Yael Mandelberg
School of Zoology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel
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Yoel Kashman
School of Chemistry, Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel
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Dafna Benayahu
Department of Cell and Developmental Biology, Sackler School of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
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Yehuda Benayahu
School of Zoology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel
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  • For correspondence: orgel@iit.eduYehudaB@tauex.tau.ac.il
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Abstract

We report here the biochemical, molecular and ultrastructural features of a unique organization of fibrillar collagen extracted from the octocoral Sarcophyton ehrenbergi. Collagen, the most abundant protein in the animal kingdom, is often defined as a structural component of extra-cellular matrices in metazoans. In the present study, collagen fibers were extracted from the mesenteries of S. ehrenbergi polyps. These fibers are organized as filaments and further compacted as coiled fibers. The fibers are uniquely long, reaching an unprecedented length of tens of centimeters. The diameter of these fibers is 9 ±0.37 µm.The amino acid content of these fibers was identified using chromatography and revealed close similarity in content to mammalian type I and II collagens. The ultrastructural organization of the fibers was characterized by means of high resolution microscopy and X-ray diffraction. The fibers are composed of fibrils and fibril bundles in the range of 15 to 35 nm. These data indicate a fibrillar collagen possessing structural aspects of both types I and II, a highly interesting and newly described form of fibrillar collagen organization.

  • Received May 29, 2017.
  • Accepted July 6, 2017.
  • © 2017. Published by The Company of Biologists Ltd
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Keywords

  • Fibrillar collagen
  • X-ray diffraction
  • Microscopy
  • Cnidaria
  • D-period
  • Red Sea

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Molecular and ultrastructural studies of a fibrillar collagen from octocoral (Cnidaria)
Joseph P. R. O. Orgel, Ido Sella, Rama S. Madhurapantula, Olga Antipova, Yael Mandelberg, Yoel Kashman, Dafna Benayahu, Yehuda Benayahu
Journal of Experimental Biology 2017 : jeb.163824 doi: 10.1242/jeb.163824 Published 13 July 2017
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Molecular and ultrastructural studies of a fibrillar collagen from octocoral (Cnidaria)
Joseph P. R. O. Orgel, Ido Sella, Rama S. Madhurapantula, Olga Antipova, Yael Mandelberg, Yoel Kashman, Dafna Benayahu, Yehuda Benayahu
Journal of Experimental Biology 2017 : jeb.163824 doi: 10.1242/jeb.163824 Published 13 July 2017

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