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  • Artikel: DFG Deutsche Nationallizenzen  (3)
  • γ-Carboxyglutamic Acid  (2)
  • 31P-NMR  (1)
Datenquelle
  • Artikel: DFG Deutsche Nationallizenzen  (3)
Materialart
Erscheinungszeitraum
  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Calcified tissue international 27 (1979), S. 187-191 
    ISSN: 1432-0827
    Schlagwort(e): Phosphopeptides ; γ-Carboxyglutamic Acid ; Calcified Cartilage ; Phosphoserine
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin , Physik
    Notizen: Summary Uncalcified cartilage from the epiphyseal portion of bovine scapulae, both distant and adjacent to the epiphyseal growth plate, and the calcified cartilage of the epiphyseal growth plate itself were analyzed for the presence of O-phosphoserine [Ser(P)], O-phosphothreonine [Thr(P)] and γ-carboxyglutamic acid (Gla). Only trace amounts of these Ca2+-binding amino acids or the peptides containing them were found in the unmineralized tissues. In contrast, whole calcified cartilage, and especially the most mineralized fraction obtained by density centrifugation, contained considerable amounts of all three amino acids. Essentially all of the Gla and the majority of the Ser(P) and Thr(P) were present in non-collagenous, non-diffusible proteins extractable in EDTA at near-neutral pH.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Calcified tissue international 33 (1981), S. 385-394 
    ISSN: 1432-0827
    Schlagwort(e): Phosphoprotein ; Bone ; 31P-NMR ; Phosphoserine ; Phosphothreonine
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin , Physik
    Notizen: Summary Fractionation of the EDTA-soluble, noncollagenous proteins of the organic matrix of chicken bone by Sephadex G-100 molecular sieving has revealed that the majority of the organic phosphorus is present in two fractions, from one of which a homogeneous phosphoprotein has been isolated. The purified phosphoprotein has an apparent molecular weight of 12,000 and contains bothO-phosphoserine andO-phosphothreonine.31P-NMR spectroscopy demonstrates that all of the organic phosphorus exists in the form of phosphomonoesters which have an average pK2 of 6.8. The phosphoprotein is highly acidic due to its high content of dicarboxylic acids in addition to the presence of organic phosphorus. The characteristic amino acid composition of the phosphoprotein establishes its noncollagenous nature and highlights the differences among bone, dentin, and enamel phosphoproteins. The absence ofγ-carboxyglutamic acid distinguishes it from osteocalcin, the noncollagenousγ-carboxyglutamic acid-containing peptide of bone matrix.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    ISSN: 1432-0827
    Schlagwort(e): Calcification ; Calciphylaxis ; Skin ; Serine Phosphate ; Threonine Phosphate ; γ-Carboxyglutamic Acid
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin , Physik
    Notizen: Summary The amount of non-collagenous proteins is increased greatly during the pathological calcification of rat skin experimentally induced by dihydrotachysterol (DHT) and Ovalbumin (topical cutaneous calciphylaxis). This is accompanied by an increase in the total amount and concentrations of protein-bound serine phosphate [Ser(P)], threonine phosphate [Thr(P)] and γ-carboxyglutamic acid (Gla), almost all of which can be extracted from the tissue and can be dissociated from collagen in 0.5M EDTA. The EDTA-soluble, non-collagenous proteins are rich in aspartic and glutamic acids, similar to the non-collagenous, EDTA-soluble proteins of bone, cementum and calcified cartilage, and quite distinct from those of dentin and enamel.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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