トロ・エラスチン
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出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2013/08/14 18:35:22」(JST)
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Tropoelastin is a water-soluble molecule with a molecular weight of approximately 72,000 daltons. Multiple tropoelastin molecules covalently bind together with crosslinks to form the protein elastin that is very prevalent in the body. There is only one gene for this molecule and so only one protein. However, occasional splicing provides tissue specificity.
There are 36 small domains in Tropoelastin and each weighs about 2 kilodaltons. Within the exons, there is alternating hydrophobic and Lysine-rich domains, this is important in forming Elastin. Tropoelastin does not undergo cleavage and forming the microfibril is achieved by a self-association process termed coacervation.
Coacervation[edit source | edit]
Tropoelastin aggregates at physiological temperature due to interactions between hydrophobic domains. This process is reversible and thermodynamically controlled. The coacervate is stabilized by cross-linking via lysyl oxidase. The coacervate then becomes insoluble and the process is irreversible. It then condenses to form a cross-linked structure of 4 residues, either Desmosine or Isodesmosine.
Tropoelastin is unusual in that it exists in multiple forms, called polymorphs. Tropoelastin is not normally available in its native state, since it becomes crosslinked immediately after its synthesis by the cell and during its export into the extracellular matrix. Tropoelastin confers strength and elasticity to the skin and other organs in the body. A synthetic form of human tropoelastin is made by DermaPlus Products from genetically modified organisms for use in wound healing and topical skin care.
References[edit source | edit]
External links[edit source | edit]
- Tropoelastin at the US National Library of Medicine Medical Subject Headings (MeSH)
Protein: scleroproteins
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Extracellular matrix |
Collagen |
Fibril forming |
- type I
- type II (COL2A1)
- type III
- type V
- COL24A1
- COL26A1
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Other |
- FACIT: type IX
- type XII (COL12A1)
- COL14A1
- COL16A1
- COL19A1
- COL20A1
- COL21A1
- COL22A1
- basement membrane: type IV
- COL4A1
- COL4A2
- COL4A3
- COL4A4
- COL4A5
- COL4A6
- multiplexin: COL15A1
- type XVIII
- transmembrane: COL13A1
- COL17A1
- COL23A1
- COL25A1
- other: type VI
- COL6A1
- COL6A2
- COL6A3
- COL6A5
- type VII (COL7A1)
- type VIII
- type X (COL10A1)
- type XI
- COL27A1
- COL28A1
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Enzymes |
- Prolyl hydroxylase/Lysyl hydroxylase
- Cartilage associated protein/Leprecan
- ADAMTS2
- Procollagen peptidase
- Lysyl oxidase
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Laminin |
- alpha
- LAMA1
- LAMA2
- LAMA3
- LAMA4
- LAMA5
- beta
- gamma
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Other |
- ALCAM
- Elastin
- Vitronectin
- FRAS1
- FREM2
- Decorin
- FAM20C
- ECM1
- Matrix gla protein
- Tectorin
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Other |
- Keratin/Cytokeratin
- Gelatin
- Reticulin
- Cartilage oligomeric matrix protein
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- See also
- diseases B proteins: BY STRUCTURE: membrane, globular (en, ca, an), fibrous
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UpToDate Contents
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English Journal
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- D'Andrea P1, Sciancalepore M2, Veltruska K3, Lorenzon P2, Bandiera A4.
- Biochimica et biophysica acta. Molecular cell research.Biochim Biophys Acta Mol Cell Res.2019 Mar;1866(3):504-517. doi: 10.1016/j.bbamcr.2018.10.012. Epub 2018 Oct 18.
- PMID 30343052
- Cell-seeded 3D scaffolds as in vitro models for electroporation.
- Brun P1, Dettin M2, Campana LG3, Dughiero F4, Sgarbossa P5, Bernardello C6, Tosi AL7, Zamuner A8, Sieni E9.
- Bioelectrochemistry (Amsterdam, Netherlands).Bioelectrochemistry.2019 Feb;125:15-24. doi: 10.1016/j.bioelechem.2018.08.006. Epub 2018 Aug 30.
- PMID 30196014
- Microfluidic-enabled bottom-up hydrogels from annealable naturally-derived protein microbeads.
- Sheikhi A1, de Rutte J2, Haghniaz R1, Akouissi O1, Sohrabi A2, Di Carlo D3, Khademhosseini A4.
- Biomaterials.Biomaterials.2019 Feb;192:560-568. doi: 10.1016/j.biomaterials.2018.10.040. Epub 2018 Nov 8.
- PMID 30530245
Japanese Journal
- Lysyl Oxidase Enhances the Deposition of Tropoelastin through the Catalysis of Tropoelastin Molecules on the Cell Surface
- Effects of postnatal dexamethasone treatment on mRNA expression profiles of genes related to alveolar development in an emphysema model in mice
- Domain 36 of Tropoelastin in Elastic Fiber Formation
Related Links
- [show abstract] [hide abstract] ABSTRACT: We investigated the flexibility of full-length tropoelastin in solution by using far- and near-ultraviolet circular dichroism (UV CD) and fluorescence spectroscopy to probe for structural flexibility ...
- Fundstellen zu "Tropoelastin" im Internet, an Universitäten und in der Literatur... cyclopaedia.net ... Elastin (löslicher Vorläufer: Tropoelastin) ist ein Faserprotein in Wirbeltieren. Es gehört zu den Strukturproteinen, weil es in seiner ...