Literature summary extracted from

Bromley, J.R.; Warnes, B.J.; Newell, C.A.; Thomson, J.C.; James, C.M.; Turnbull, C.G.; Hanke, D.E.
A purine nucleoside phosphorylase in Solanum tuberosum L. (potato) with specificity for cytokinins contributes to the duration of tuber endodormancy (2014), Biochem. J., 458, 225-237.

Organism

EC Number	Organism	UniProt	Comment	Textmining
2.4.2.1	Solanum tuberosum	-	-	-

Source Tissue

EC Number	Source Tissue	Comment	Organism	Textmining
2.4.2.1	stolon	-	Solanum tuberosum	-
2.4.2.1	tuber	-	Solanum tuberosum	-

Substrates and Products (Substrate)

EC Number	Substrates	Comment Substrates	Organism	Products	Comment (Products)	Rev.	Reac.
2.4.2.1	adenosine + phosphate	-	Solanum tuberosum	adenine + alpha-D-ribose 1-phosphate	-	r
2.4.2.1	cytokinin + phosphate	the enzyme prefers cytokinin to unsubstituted aminopurines	Solanum tuberosum	? + alpha-D-ribose 1-phosphate	-	r
2.4.2.1	dihydrozeatin riboside + phosphate	-	Solanum tuberosum	dihydrozeatin + alpha-D-ribose 1-phosphate	-	r
2.4.2.1	isopentenyladenosine + phosphate	-	Solanum tuberosum	isopentenyladenine + alpha-D-ribose 1-phosphate	-	r
2.4.2.1	additional information	the enzyme has no detectable ribohydrolase activity	Solanum tuberosum	?	-	?
2.4.2.1	trans-zeatin riboside + phosphate	-	Solanum tuberosum	trans-zeatin + alpha-D-ribose 1-phosphate	-	r

Synonyms

EC Number	Synonyms	Comment	Organism
2.4.2.1	CKP1	-	Solanum tuberosum
2.4.2.1	cytokinin riboside phosphorylase	-	Solanum tuberosum
2.4.2.1	purine nucleoside phosphorylase	-	Solanum tuberosum

General Information

EC Number	General Information	Comment	Organism
2.4.2.1	physiological function	the enzyme is active in tubers as a negative regulator of cytokinins, prolonging endodormancy by a chill-reversible mechanism	Solanum tuberosum

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Release 2023.1 (January 2023)