Pilatus U, Mayer A, Hildebrandt A
Fachbereich 1 (Physik), Universität Bremen, Federal Republic of Germany.
Arch Biochem Biophys. 1989 Nov 15;275(1):215-23. doi: 10.1016/0003-9861(89)90366-4.
31P NMR spectroscopic analysis of the polyphosphate pool in cellular and nuclear extracts of Physarum polycephalum demonstrates that plasmodia and cysts contain inorganic polyphosphates with an average chain length of about 100 phosphates. However, only during sporulation are these high-molecular-weight polyphosphates degraded to a lower molecular weight corresponding to an average chain length of about 10 phosphates. Since polyphosphates are degraded even in the presence of a sufficiently large pool of inorganic phosphate, produced by intracellular injection, we conclude that the degradation of polyphosphates serves in supplying energy for biosynthesis during sporulation rather than in increasing the availability of phosphate.
多头绒泡菌细胞和细胞核提取物中多聚磷酸盐库的³¹P核磁共振光谱分析表明，原质团和囊肿含有平均链长约为100个磷酸基团的无机多聚磷酸盐。然而，只有在孢子形成过程中，这些高分子量的多聚磷酸盐才会降解为较低分子量的物质，其平均链长约为10个磷酸基团。由于即使在通过细胞内注射产生足够大量无机磷酸盐库的情况下，多聚磷酸盐仍会降解，我们得出结论，多聚磷酸盐的降解是为孢子形成过程中的生物合成提供能量，而不是为了增加磷酸盐的可用性。
