Words similar to polyphosphate
Example sentences for: polyphosphate
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Disruption of HNT2and tetrad analysis of dinucleoside polyphosphate levels
Human Fhit [ 14 ] and the S. cerevisiae Fhit homolog [ 13 ] , which was called Aph1 but is here termed Hnt2 under nomenclature aproved by the Saccharomyces Genome Database, cleave ApppA more readily while Aph1, the S. pombe homolog, cleaves AppppA more readily [ 20 ] . Consistent with the ApppA hydrolase activity of purified Fhit protein, most cancer cell lines that are Fhit negative at the protein level have higher levels of ApppA than cell lines that are Fhit positive [ 21 ] . Nonetheless, the actual concentrations of dinucleoside polyphosphates were submicromolar in every cell culture sample [ 21 ] and thus, under the reported culture conditions, the measured dinucleoside polyphosphates would not be expected to occupy the Fhit active site substantially [ 19 ] . Dinucleoside polyphosphate levels were measured in adenine-requiring S. cerevisiae strains before or after disruption of the Fhit-homologous HNT2 gene [ 13 ] and in adenine-requiring S. pombe strains as a function of disruption and overexpression of the Fhit-homologous aph1 gene [ 22 ] . Recently, it was observed that diadenosine polyphosphates undergo a divalent cation-dependent conformational change that might mediate their biosynthesis, catabolism or signaling properties [ 23 ] .
Additionally, in Methanosarcina the CYTH-encoding genes are found in predicted operons or in the neighborhood of genes encoding exopolyphosphatase (PPX) and polyphosphate kinase (PPK).
The primary biological function of these proteins appears to be related to polyphosphate and nucleotide metabolism.
Hnt2 active site-dependence of dinucleoside polyphosphate accumulation
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