Bioorganic/inorganic hybrid composition of sponge spicules: Matrix of the giant spicules and of the comitalia of the deep sea hexactinellid Monorhaphis

Müller, Wernér E.G.; Wang, Xiaohong; Kropf, Klaus; Ushijima, Hiroshi; Geurtsen, Werner; Eckert, Carsten; Tahir, Muhammad Nawaz; Tremel, Wolfgang; Boreiko, Alexandra; Schloßmacher, Ute; Li, Jinhe; Schröder, Heinz C.

doi:10.1016/j.jsb.2007.10.009

Cited by 78 publications

(90 citation statements)

References 50 publications

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“…This skeleton is made up of needle-like spicules of amorphous silica, templated by axial collagen fibers [10,11,82,[156][157][158] that are encased in a collagen net [10,156]. The structure is diagramed in Fig.…”

Section: Sea Sponge Spiculesmentioning

confidence: 99%

Structure and mechanical properties of selected protective systems in marine organisms

Naleway

Taylor

Porter

et al. 2016

Materials Science and Engineering: C

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Section: Sea Sponge Spiculesmentioning

confidence: 99%

Structure and mechanical properties of selected protective systems in marine organisms

Naleway

Taylor

Porter

et al. 2016

Materials Science and Engineering: C

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“…The major protein of the axial filament of the demosponge Tethya aurantium is an enzyme termed as silicatein by Morse et al, which mediates polymerization/condensation of orthosilicate to polymeric (bio)silicate [8]. In their study on Monorhaphis chuni and Monorhaphis intermedia (hexactinellids), Müller et al, proposed that the growth of spicules starts intracellularly and proceeds by lamellar apposition of silica layers, separated by sheets of organic matrices formed by a very likely silicatein-like protein(s) and a lectin [9]. The outer surface of the spicules would be covered by a collagen net.…”

Section: Introductionmentioning

confidence: 99%

A Solid State NMR Investigation of Recent Marine Siliceous Sponge Spicules

et al. 2016

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Abstract:The composition of four recent siliceous marine sponge spicules was studied and compared. In particular, multinuclear ( 29 Si, 13 C, 31 P) solid state nuclear magnetic resonance (NMR) allowed the characterization of both the mineral and organic constituents in a non-destructive manner. The silica network condensation was similar for all samples. The organic matter showed a similar pattern but varied in abundance as a function of the sponge group (Hexactinellida or Demospongiae) and sampling conditions (living or dead organisms). This indicates that the striking morphological differences observed at the macroscale for the various samples do not lead to significant fingerprints in the spectroscopic signatures of the mineral and organic constituents.

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“…This assumption stems from the observations that, at interfaces between two phases, sudden and considerable changes of the apparent activation energies occur (Wynn-Williams, 1976;Ben-Shooshan et al, 2002). Until now, only from the spicules of the siliceous sponges has a protein-bio-silica hybrid been described (Müller et al, 2008a;Müller et al, 2008c). In sponge spicules, this hybrid composition provides them with unusually high toughness combined with extreme flexibility, a feature that pushed sponge biosilica to the forefront of material sciences (Mayer, 2005) (reviewed in Schröder et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Biosilicification of loricate choanoflagellate: organic composition of the nanotubular siliceous costal strips of Stephanoeca diplocostata

Gong

Wiens

Schröder

et al. 2010

Journal of Experimental Biology

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SUMMARYLoricate choanoflagellates (unicellular, eukaryotic flagellates; phylum Choanozoa) synthesize a basket-like siliceous lorica reinforced by costal strips (diameter of approximately 100nm and length of 3m). In the present study, the composition of these siliceous costal strips is described, using Stephanoeca diplocostata as a model. Analyses by energy-dispersive X-ray spectroscopy (EDX), coupled with transmission electron microscopy (TEM), indicate that the costal strips comprise inorganic and organic components. The organic, proteinaceous scaffold contained one major polypeptide of mass 14kDa that reacted with wheat germ agglutinin. Polyclonal antibodies were raised that allowed mapping of the proteinaceous scaffold, the (glyco)proteins, within the costal strips. Subsequent in vitro studies revealed that the organic scaffold of the costal strips stimulates polycondensation of ortho-silicic acid in a concentration-and pH-dependent way. Taken together, the data gathered indicate that the siliceous costal strips are formed around a proteinaceous scaffold that supports and maintains biosilicification. A scheme is given that outlines that the organic template guides both the axial and the lateral growth of the strips.

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Bioorganic/inorganic hybrid composition of sponge spicules: Matrix of the giant spicules and of the comitalia of the deep sea hexactinellid Monorhaphis

Cited by 78 publications

References 50 publications

Structure and mechanical properties of selected protective systems in marine organisms

Structure and mechanical properties of selected protective systems in marine organisms

A Solid State NMR Investigation of Recent Marine Siliceous Sponge Spicules

Biosilicification of loricate choanoflagellate: organic composition of the nanotubular siliceous costal strips of Stephanoeca diplocostata

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