Summary
The fate of 14C in snails given 14C-proline and 14C-hydroxyproline has been examined by radiometric analyses of hepatopancreas homogenates. Free 14C-proline and 14C-hydroxyproline, supplied orally to the animals, were incorporated into bound 14C-proline and 14C-hydroxyproline in the structural protein of three different hepatopancreas homogenate fractions: (a) granules, (b) small calcium spherites, and (c) large calcium spherites. The presence of hydroxyproline in granules and calcium spherites gives reason to believe that a fibrillar protein related to the collagen-type might occur within these structures. The 14C-proline and 14C-hydroxyproline incorporation test measured total radioactivity of each homogenate fraction, expressed as net counts per minute (cpm) per mg of dry weight of each fraction. The radioactivity of the granule and small calcium spherite fractions was about 6–8 times greater than that of the large calcium spherite fraction.
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Abolinš-Krogis, A.: The histochemistry of the hepatopancreas of Helix pomatia (L.) in relation to the regeneration of the shell. Ark. Zool. 13, 159–201 (1961)
Abolinš-Krogis, A.: Some features of the chemical composition of isolated cytoplasmic inclusions from the cells of the hepatopancreas of Helix pomatia (L.). Ark. Zool. 15, 393–429 (1963)
Abolinš-Krogis, A.: Electron microscope observations on calcium cells in the hepatopancreas of the snail, Helix pomatia L. Ark. Zool. 18, 85–92 (1965)
Abolinš-Krogis, A.: Electron microscope studies of the intracellular origin and formation of calcifying granules and calcium spherites in the hepatopancreas of the snail, Helix pomatia L. Z. Zellforsch. 108, 501–515 (1970)
Abolinš-Krogis, A.: Fluorescence and histochemical studies of the calcification-initiating lipofuscin type pigment granules in the shell-repair membrane of the snail, Helix pomatia L. Z. Zellforsch. 142, 205–221 (1973)
Bhatnagar, R. S., Prockop, D. J., Rosenbloom, J.: Intracellular pool of unhydroxylated polypeptide precursors of collagen. Science 158, 492–494 (1967)
Degens, E. T., Spencer, D. W., Parker, R. H.: Paleobiochemistry of molluscan shell proteins. Comp. Biochem. Physiol. 20, 553–579 (1967)
Farris, V. K.: Molluscan cells: Dissociation and reaggregation. Science 160, 1245–1246 (1968)
Jibril, A. O.: Phosphates and phospatases in preosseous cartilage. Biochim. biophys. Acta (Amst.) 141, 605–613 (1967)
Juva, K., Prockop, D. J.: Hydroxylation of proline and the intracellular accumulation of a polypeptide precursor of collagen. Science 152, 92–94 (1966)
Mitoma, C., Smith, T. E., Friedberg, F., Rayford, C. R.: Incorporation of hydroxyproline into tissue proteins by chick embryos. J. biol. Chem. 234, 78–80 (1959)
Saleuddin, A. S. M., Hare, P. E.: Amino acid compositions of normal and regenerated shell of Helix. Canad. J. Zool. 48, 886–888 (1970)
Smith, R. H., Jackson, S. F.: Studies on the biosynthesis of collagen. II. The conversion of 14C-L-proline to 14C-hydroxyproline by fowl osteoblasts in tissue culture. J. biophys. biochem. Cytol. 3, 913–922 (1957)
Vittur, F., Pugliarello, M. C., Bernard, B. de: Chemical modifications of cartilage matrix during endochondral calcification. Experientia (Basel) 27, 126–127 (1971)
Wilbur, K. M., Watabe, N.: Experimental studies on calcification in molluscs and the alga Coccolithus Huxleyi. Ann. N. Y. Acad. Sci. 109, 82–122 (1963)
Wolf, G., Berger, C. R. A.: The metabolism of hydroxyproline in the intact rat. Incorporation of hydroxyproline into protein and urinary metabolites. J. biol. Chem. 230, 231–240 (1958)
Wuthier, R. E.: A zonal analysis of inorganic and organic constituents of the epiphysis during endochondral calcification. Calcif. Tiss. Res. 4, 20–38 (1969)
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This investigation was supported by a grant from the Swedish Natural Science Research Council, which is gratefully acknowledged.
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Abolinš-Krogis, A. A study of 14C-proline and 14C-hydroxyproline incorporation in different homogenate fractions of the hepatopancreas of the snail, Helix pomatia L.. Cell Tissue Res. 156, 217–221 (1975). https://doi.org/10.1007/BF00221804
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DOI: https://doi.org/10.1007/BF00221804