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phosphoglucomutase/pomme de terre
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Phosphoglucomutase from potato tubers. Chemical and catalytic properties.
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The chemical and catalytic properties of potato phosphoglucomutase [EC 2.7.5.1] were studied using various enzyme species (Peaks Ia, Ib, Ic, and II; Takamiya, S. & Fukui, T. (1978) Plant Cell Physiol. 19, 319--328). The molecular weights of the species are all approximately 60,000. No indication of
Antisense inhibition of plastidial phosphoglucomutase provides compelling evidence that potato tuber amyloplasts import carbon from the cytosol in the form of glucose-6-phosphate.
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The aim of this work was to establish whether plastidial phosphoglucomutase is involved in the starch biosynthetic pathway of potato tubers and thereby to determine the form in which carbon is imported into the potato amyloplast. For this purpose, we cloned the plastidial isoform of potato PGM
Antisense repression of cytosolic phosphoglucomutase in potato (Solanum tuberosum) results in severe growth retardation, reduction in tuber number and altered carbon metabolism.
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The aim of this work was to investigate the role of cytosolic phosphoglucomutase (PGM; EC 5.4.2.2) in the regulation of carbohydrate metabolism. Many in vitro studies have indicated that PGM plays a central role in carbohydrate metabolism; however, until now the importance of this enzyme in plants
Carbon assimilation and metabolism in potato leaves deficient in plastidial phosphoglucomutase.
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We have previously described the generation of transgenic potato ( Solanum tuberosum L. cv. Desiree) lines expressing the S. tuberosum plastidial phosphoglucomutase ( StpPGM) gene in the antisense orientation under the control of the 35S promoter and characterised heterotrophic metabolism in these
Tuber-specific cytosolic expression of a bacterial phosphoglucomutase in potato (Solanum tuberosum L.) dramatically alters carbon partitioning.
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Constitutive antisense inhibition of the cytosolic isoform of phosphoglucomutase in the potato (Solanum tuberosum L.) results in restriction of photosynthesis, growth inhibition and modified tuber morphology, and a severe restriction of tuber starch synthesis. Here we describe the consequences of
The contribution of plastidial phosphoglucomutase to the control of starch synthesis within the potato tuber.
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The aim of this work was to evaluate the extent to which plastidial phosphoglucomutase (PGM) activity controls starch synthesis within potato (Solanum tuberosum L. cv. Desirée) tubers. The reduction in the activity of plastidial PGM led to both a correlative reduction in starch accumulation and an
Expression of an Escherichia coli phosphoglucomutase in potato (Solanum tuberosum L.) results in minor changes in tuber metabolism and a considerable delay in tuber sprouting.
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The aim of this work was to evaluate the influence of elevating the cytosolic activity of phosphoglucomutase (PGM; EC 5.4.2.2) on photosynthesis, growth and heterotrophic metabolism. Here we describe the generation of novel transgenic plants expressing an Escherichia coli phosphoglucomutase (EcPGM)
[Phosphoglucomutase in potato tubers].
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[Studies on the properties of phosphoglucomutase in potato extracts and in their enzymatic preparations].
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[Enzyme activities and substrate levels of carbohydrate metabolism in proliferating and suberin synthesizing potato tuber cells].
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Isolation of tissue fragments from the potato tuber can initiate either periderm formation including suberin synthesis or cell proliferation without cicatrization effects. TCA-cycle activity has been shown to develop only in causal correlation with suberin synthesis (Lange, 1970). Biochemical
Proteomic approach reveals that starch degradation contributes to anthocyanin accumulation in tuberous root of purple sweet potato.
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A comparative proteomic approach was carried out to investigate anthocyanin biosynthesis in the tuberous roots of yellow sweet potato (YSP) and purple sweet potato (PSP) cultivars. More than 800 proteins were reproducibly detected through two-dimensional electrophoresis (2-DE), of which 50 proteins
Effects of fructose 2,6-bisphosphate on phosphoglucomutase from plants.
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Fructose 2,6-bisphosphate affects phosphoglucomutase from plant and animal sources in a similar way. As previously found with rabbit muscle phosphoglucomutase, fructose 2,6-bisphosphate cannot substitute for glucose 1,6-bisphosphate as a cofactor in the reaction catalyzed by phosphoglucomutase from
Characterization of transgenic potato (Solanum tuberosum) tubers with increased ADPglucose pyrophosphorylase.
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The aim of the work described in this paper was to characterize the tubers of potato (Solanum tuberosum var. Prairie) plants that had been transformed with the Escherichia coli ADPglucose pyrophosphorylase (EC 2.7.7.27) gene, glgC-16, under the control of a patatin promoter. Over 30 lines of
The influence of cytosolic phosphoglucomutase on photosynthetic carbohydrate metabolism.
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The aim of this work was to examine the role of cytosolic phosphoglucomutase (cPGM; EC 5.4.2.2) in photosynthetic carbon partitioning. We have previously described the generation and characterisation of the tuber metabolism of transgenic potato ( Solanum tuberosum cv. Desiree) lines expressing the
Increased fatty acid production in potato by engineering of acetyl-CoA carboxylase.
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In contrast to oil seeds, potato (Solanum tuberosum L.) is characterized by a high amount of starch stored in the tubers. To assess the capacity for oil synthesis in potato tubers, the changes in lipid content and flux into lipid synthesis were explored in transgenic potatoes altered in carbohydrate
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