P9752
Phosphoriboisomerase from spinach
Type I, partially purified powder, ≥40 units/mg protein (biuret)
Synonym(s):
D-Ribose-5-phosphate ketol-isomerase
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About This Item
CAS Number:
MDL number:
UNSPSC Code:
12352204
NACRES:
NA.54
Recommended Products
biological source
spinach
Quality Level
type
Type I
form
partially purified powder
specific activity
≥40 units/mg protein (biuret)
storage temp.
−20°C
Application
Phosphoriboisomerase is used to study the ribulose monophosphate pathway. Phosphoriboisomerase from spinach is used in enzyme assays to convert ribose 5-phosphate to ribulose 5-phosphate.
Biochem/physiol Actions
Phosphoriboisomerase is responsible for the converstion of ribose 5-phosphate to ribulose 5-phosphate.
Unit Definition
One unit will convert 1.0 μmole of D-ribose 5-phosphate to D-ribulose 5-phosphate per min at pH 7.7 at 30 °C.
Storage Class
11 - Combustible Solids
wgk_germany
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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Tae Gyun Kim et al.
Molecules and cells, 27(1), 99-103 (2009-02-14)
Ribose-5-phosphate isomerase A (RpiA) plays an important role in interconverting between ribose-5-phosphate (R5P) and ribulose-5-phosphate in the pentose phosphate pathway and the Calvin cycle. We have determined the crystal structures of the open form RpiA from Vibrio vulnificus YJ106 (VvRpiA)
Richard W Strange et al.
Acta crystallographica. Section F, Structural biology and crystallization communications, 65(Pt 12), 1214-1217 (2010-01-08)
Ribose-5-phosphate isomerase is a ubiquitous intracellular enzyme of bacterial, plant and animal origin that is involved in the pentose phosphate cycle, an essential component of cellular carbohydrate metabolism. Specifically, the enzyme catalyses the reversible conversion of ribose 5-phosphate to ribulose
Ana L Stern et al.
The FEBS journal, 278(5), 793-808 (2011-01-06)
Ribose-5-phosphate isomerase (Rpi; EC 5.3.1.6) is a key activity of the pentose phosphate pathway. Two unrelated types of sequence/structure possess this activity: type A Rpi (present in most organisms) and type B Rpi (RpiB) (in some bacteria and parasitic protozoa).
Soo-Jin Yeom et al.
Biotechnology letters, 32(6), 829-835 (2010-02-16)
The activity of ribose-5-phosphate isomerases (RpiB) from Clostridium difficile for D-ribose isomerization was optimal at pH 7.5 and 40 degrees C, while that from Thermotoga maritima for L-talose isomerization was optimal at pH 8.0 and 70 degrees C. C. difficile
Junho Jung et al.
Acta crystallographica. Section F, Structural biology and crystallization communications, 65(Pt 11), 1141-1144 (2009-11-20)
Rare sugars are used for many industrial and medical purposes and are produced by the interconversion between aldoses and ketoses catalyzed by sugar and sugar-phosphate isomerases. Recently, Clostridium thermocellum d-ribose-5-phosphate isomerase (CTRPI), an aldose-ketose isomerase, was cloned in order to
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