RGD Reference Report - Hexose-6-phosphate and 6-phosphogluconate dehydrogenases of rat liver microsomes. Involvement in NADPH and carbon dioxide generation in the luminal space of microsomal vesicles.

Advanced Search (OLGA)

General

Hexose-6-phosphate and 6-phosphogluconate dehydrogenases of rat liver microsomes. Involvement in NADPH and carbon dioxide generation in the luminal space of microsomal vesicles.
Authors:	Hino, Y Minakami, S
Citation:	Hino Y and Minakami S, J Biochem (Tokyo). 1982 Aug;92(2):547-57.
RGD ID:	1641956
Pubmed:	PMID:6813321 (View Abstract at PubMed)
Rat liver microsomal fraction generates 14CO2 from [1(-14)C]glucose 6-phosphate in the presence of NADP+ and a detergent. The activity is mediated through an enzyme system consisting of hexose-6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase inherent to the microsomes, with the latter enzyme reaction being a rate-determining step. Both enzymes of the system in microsomes are extremely resistant to trypsin digestion, thereby distinguishing them from the corresponding cytosol enzymes. A stoichiometric relationship was obtained between the generations of NADPH and 14CO2 (2: 1 on a molar basis), indicating that the observed generation of NADPH in microsomes could entirely be accounted for by the action of the enzyme system. A method was devised to measure NADP(H) inside or outside the microsomal vesicles, and it was found that a considerable amount of the cofactor was present within the vesicles. Subfractionation of various intracellular fractions on sucrose density gradients confirmed the close association of NADP(H) with liver microsomes. It is suggested that both enzymes of the system function to generate the reduced form of NADP+ in the luminal space of the endoplasmic reticulum, where NADP(H) and glucose 6-phosphate are available.

Annotation Click to see Annotation Detail View

Gene Ontology Annotations Click to see Annotation Detail View

Biological Process

Only show annotations with direct experimental evidence (0 objects hidden)

Object Symbol	Species	Term	Qualifier	Evidence	With	Notes	Source	Original Reference(s)
H6pd	Rat	NADP metabolic process		IDA			RGD
Pgd	Rat	NADP metabolic process		IDA			RGD

Molecular Function

Only show annotations with direct experimental evidence (0 objects hidden)

Object Symbol	Species	Term	Qualifier	Evidence	With	Notes	Source	Original Reference(s)
H6pd	Rat	carbohydrate binding		IDA			RGD
Pgd	Rat	carbohydrate binding		IDA			RGD
H6pd	Rat	glucose-6-phosphate dehydrogenase activity		IDA			RGD
H6pd	Rat	NADP binding		IDA			RGD
Pgd	Rat	NADP binding		IDA			RGD
Pgd	Rat	phosphogluconate dehydrogenase (decarboxylating) activity		IDA			RGD

Objects Annotated

Genes (Rattus norvegicus)

H6pd (hexose-6-phosphate dehydrogenase (glucose 1-dehydrogenase))

Pgd (phosphogluconate dehydrogenase)

Additional Information

Gene Annotator (Functional Annotation) unavailable	Gene Annotator (Annotation Distribution) unavailable	Variant Visualizer (Genomic Variants) unavailble Variant Visualizer (Genomic Variants) unavailable
Gene Annotator (Functional Annotation)	Gene Annotator (Annotation Distribution)	Variant Visualizer (Genomic Variants)

InterViewer (Protein-Protein Interactions) unavailable	Gviewer (Genome Viewer) unavailable	Variant Visualizer (Damaging Variants) unavailble Variant Visualizer (Damaging Variants) unavailable
InterViewer (Protein-Protein Interactions)	GViewer (Genome Viewer)	Variant Visualizer (Damaging Variants)

Gene Annotator (Annotation Comparison) unavailable	OLGA (Gene List Generator) unavailable
Gene Annotator (Annotation Comparison)	OLGA (Gene List Generator)	Excel (Download)

MOET (Multi-Ontology Enrichement) unavailable	GOLF (Gene-Ortholog Location Finder) unavailable
MOET (Multi-Ontology Enrichement)	GOLF (Gene-Ortholog Location Finder)

Create Name:

Description:

Send us a Message

Hexose-6-phosphate and 6-phosphogluconate dehydrogenases of rat liver microsomes. Involvement in NADPH and carbon dioxide generation in the luminal space of microsomal vesicles.