83205
Pyrophosphatase, Inorganic from baker′s yeast (S. cerevisiae)
powder, off-white, ~70 U/mg
Synonym(s):
Inorganic Pyrophosphatase, Pyrophosphate phosphohydrolase
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About This Item
CAS Number:
UNSPSC Code:
12352204
EC Number:
232-784-7
MDL number:
form
powder
specific activity
~70 U/mg
mol wt
Mr ~71000
color
off-white
storage temp.
−20°C
General description
Molecular Weight: 71 kDa (homodimer consisting of two equal subunits of molecular weight 32-35 kDa)
Extinction Coefficient: E1% = 14.5 (280 nm)
pI: 4.75
This ubiquitous enzyme serves to drive metabolic reactions that produce pyrophosphate, since these reactions typically have equilibrium constants near unity. The catalytic mechanism has been described in the literature. Inorganic pyrophosphatase is a metalloprotease that requires Mg2+ for maximal activity. Although the hydrolysis of inorganic pyrophosphate is specific in the presence of Mg2+, both ADP and ATP can be hydrolyzed if zinc is present.
Extinction Coefficient: E1% = 14.5 (280 nm)
pI: 4.75
This ubiquitous enzyme serves to drive metabolic reactions that produce pyrophosphate, since these reactions typically have equilibrium constants near unity. The catalytic mechanism has been described in the literature. Inorganic pyrophosphatase is a metalloprotease that requires Mg2+ for maximal activity. Although the hydrolysis of inorganic pyrophosphate is specific in the presence of Mg2+, both ADP and ATP can be hydrolyzed if zinc is present.
Application
Inorganic pyrophosphatase (PPase) is a ubiquitous enzyme catalyzing the reaction PPi + H2O → 2Pi.
It plays an important role in protein, RNA, and DNA synthesis.
It plays an important role in protein, RNA, and DNA synthesis.
Other Notes
1 U corresponds to the amount of enzyme which will liberate 1 μmol of phosphate from inorganic pyrophosphate per minute at pH 7.2 and 25 °C
Mechanism of action
Storage Class
13 - Non Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
Regulatory Information
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The mechanism of action of yeast inorganic pyrophosphatase.
B S Cooperman
Methods in enzymology, 87, 526-548 (1982-01-01)
Genetic manipulation of a "vacuolar" H(+)-PPase: from salt tolerance to yield enhancement under phosphorus-deficient soils.
Roberto A Gaxiola et al.
Plant physiology, 159(1), 3-11 (2012-03-22)
Habib Khoudi et al.
Journal of plant physiology, 169(1), 98-103 (2011-11-08)
Cadmium (Cd) is considered an extremely significant pollutant due to its high toxicity to many organisms. Plants have evolved several mechanisms to cope with Cd, the most important of which is vacuolar sequestration. Cadmium can be directly transported into vacuoles
Zhigang Li et al.
Methods in molecular biology (Clifton, N.J.), 913, 359-369 (2012-08-17)
Plant vacuoles have multifaceted roles including turgor maintenance, cytosolic pH and ionic homeostasis, plant protection against environmental stress, detoxification, pigmentation, and cellular signaling. These roles are achieved through the coordinated activities of many proteins in the tonoplast (vacuolar membrane), of
Ali Ferjani et al.
Plant signaling & behavior, 7(1), 38-42 (2012-02-04)
The synthesis of DNA, RNA, and de novo proteins is fundamental for early development of the seedling after germination, but such processes release pyrophosphate (PPi) as a byproduct of ATP hydrolysis. The over-accumulation of the inhibitory metabolite PPi in the
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