Proteopedia - User contributions [en]

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2011-04-04T00:41:27Z

Sean Henderson:

{{STRUCTURE_1faj| PDB=1faj | SCENE=}}
<scene name='Sandbox_Reserved_320/Ppase/1'>Soluble inorganic pyrophosphatase</scene> is a ubiquitous enzyme that plays an important role in energy metabolism <ref name= "kankare"> PMID: 7971944</ref>. Energy metabolism is made possible by soluble inorganic pyrophosphatases (PPases) by their hydrolyzing inorganic phosphates into two molecules of orthophosphate <ref name = "samygina"> PMID: 11846572</ref>. PPases may have had an important role in evolution by aiding in accurate DNA copying during chromosome duplication <ref name = "kankare"/>. Escherichia coli (E-coli bacteria) and Saccharomyces cerevisiae (S. cerevisiae yeast) PPases, E-PPase and Y-PPase respectively, are the two best studied PPases <ref name = "kankare"/>.

== '''Inorganic Pyrophosphatase''' ==

__TOC__

==Structure==
E-PPase, a homohexameric protein <ref name = "wong"> PMID: 5498422 </ref>, contains 175 amino-acid residues in each subunit <ref name = "lahti"> PMID: 2848015 </ref>. The protein's topology is described as a five stranded β-barrel that is distorted, highly twisted, and composted of strands β1, β4, β5, β6 and β7, capped on top with α-helix B and the bottom by a loop between strand five and strand six <ref name = "kankare"/>. The active site exists in the bowl formed by the <scene name='Sandbox_Reserved_320/Excursions/1'>excursions</scene> <ref name = "kankare"/>.

==Function==
[[Image:Figure_1.png|left|thumb|'''Figure 1.''' Reaction catalyzed by Inorganic Pyrophosphatase (PPase)]]PPases act to cleave PPi as it is a byproduct in many biosynthetic reactions that include protein, RNA and DNA synthesis<ref name = "kankare"/>. By cleaving the PPi in these synthesis reactions it shifts the equilibrium constants towards biosynthesis <ref name ="kankare"/>. In order to achieve PPi cleavage PPases require a divalent metal ion, usually magnesium <ref name = "kankare"/>. Calcium, alternatively, has been shown to fully suppress PPase activity <ref name = "samygina"/>. PPi hydrolysis is a complicated process that is still not fully understood <ref name = "samygina"/>.

<br>
==References==
<references/>

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2011-04-04T00:40:37Z

Sean Henderson:

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2011-04-04T00:39:48Z

Sean Henderson:

Sandbox Reserved 320

2011-04-04T00:30:37Z

Sean Henderson:

{{STRUCTURE_1faj| PDB=1faj | SCENE=}}
Soluble inorganic pyrophosphatase is a ubiquitous enzyme that plays an important role in energy metabolism <ref name= "kankare"> PMID: 7971944</ref>. Energy metabolism is made possible by soluble inorganic pyrophosphatases (PPases) by their hydrolyzing inorganic phosphates into two molecules of orthophosphate <ref name = "samygina"> PMID: 11846572</ref>. PPases may have had an important role in evolution by aiding in accurate DNA copying during chromosome duplication <ref name = "kankare"/>. Escherichia coli (E-coli bacteria) and Saccharomyces cerevisiae (S. cerevisiae yeast) PPases, E-PPase and Y-PPase respectively, are the two best studied PPases <ref name = "kankare"/>.

== '''Inorganic Pyrophosphatase''' ==

__TOC__

==Structure==
E-PPase, a homohexameric protein <ref name = "wong"> PMID: 5498422 </ref>, contains 175 amino-acid residues in each subunit <ref name = "lahti"> PMID: 2848015 </ref>. The protein's topology is described as a five stranded β-barrel that is distorted, highly twisted, and composted of strands β1, β4, β5, β6 and β7, capped on top with α-helix B and the bottom by a loop between strand five and strand six <ref name = "kankare"/>. The active site exists in the bowl formed by the <scene name='Sandbox_Reserved_320/Excursions/1'>excursions</scene> <ref name = "kankare"/>.

==Function==
[[Image:Figure_1.png|left|thumb|'''Figure 1.''' Reaction catalyzed by Inorganic Pyrophosphatase (PPase)]]PPases act to cleave PPi as it is a byproduct in many biosynthetic reactions that include protein, RNA and DNA synthesis<ref name = "kankare"/>. By cleaving the PPi in these synthesis reactions it shifts the equilibrium constants towards biosynthesis <ref name ="kankare"/>. In order to achieve PPi cleavage PPases require a divalent metal ion, usually magnesium <ref name = "kankare"/>. Calcium, alternatively, has been shown to fully suppress PPase activity <ref name = "samygina"/>. PPi hydrolysis is a complicated process that is still not fully understood <ref name = "samygina"/>.

=References=
<references/>

File:Figure 1.png

2011-04-04T00:27:02Z

Sean Henderson: PPase reaction

== Summary ==
PPase reaction
== Licensing ==
{{PD-self}}

Sandbox Reserved 320

2011-04-04T00:06:43Z

Sean Henderson:

{{STRUCTURE_1faj| PDB=1faj | SCENE=}}
Soluble inorganic pyrophosphatase is a ubiquitous enzyme that plays an important role in energy metabolism <ref name= "kankare"> PMID: 7971944</ref>. Energy metabolism is made possible by soluble inorganic pyrophosphatases (PPases) by their hydrolyzing inorganic phosphates into two molecules of orthophosphate <ref name = "samygina"> PMID: 11846572</ref>. PPases may have had an important role in evolution by aiding in accurate DNA copying during chromosome duplication <ref name = "kankare"/>. Escherichia coli (E-coli bacteria) and Saccharomyces cerevisiae (S. cerevisiae yeast) PPases, E-PPase and Y-PPase respectively, are the two best studied PPases <ref name = "kankare"/>.

== '''Inorganic Pyrophosphatase''' ==

__TOC__

==Structure==
E-PPase, a homohexameric protein <ref name = "wong"> PMID: 5498422 </ref>, contains 175 amino-acid residues in each subunit <ref name = "lahti"> PMID: 2848015 </ref>. The protein's topology is described as a five stranded β-barrel that is distorted, highly twisted, and composted of strands β1, β4, β5, β6 and β7, capped on top with α-helix B and the bottom by a loop between strand five and strand six <ref name = "kankare"/>. The active site exists in the bowl formed by the <scene name='Sandbox_Reserved_320/Excursions/1'>excursions</scene> <ref name = "kankare"/>.

==Function==
PPases act to cleave PPi as it is a byproduct in many biosynthetic reactions that include protein, RNA and DNA synthesis<ref name = "kankare"/>. By cleaving the PPi in these synthesis reactions it shifts the equilibrium constants towards biosynthesis <ref name ="kankare"/>. In order to achieve PPi cleavage PPases require a divalent metal ion, usually magnesium <ref name = "kankare"/>. Calcium, alternatively, has been shown to fully suppress PPase activity <ref name = "samygina"/>. PPi hydrolysis is a complicated process that is still not fully understood <ref name = "samygina"/>.

=References=
<references/>

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2011-03-31T23:06:40Z

Sean Henderson:

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2011-03-31T22:49:12Z

Sean Henderson:

Sandbox Reserved 320

2011-03-31T22:37:27Z

Sean Henderson:

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2011-03-31T22:36:44Z

Sean Henderson:

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2011-03-17T23:24:42Z

Sean Henderson:

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2011-03-17T23:24:05Z

Sean Henderson:

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2011-03-17T16:45:54Z

Sean Henderson:

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2011-03-17T16:45:34Z

Sean Henderson:

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2011-03-17T16:45:07Z

Sean Henderson:

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2011-03-17T16:44:35Z

Sean Henderson:

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2011-03-15T00:01:11Z

Sean Henderson:

{{STRUCTURE_1faj| PDB=1faj | SCENE=}}
== '''Inorganic Pyrophosphatase''' ==

Sandbox Reserved 320

2011-03-15T00:00:34Z

Sean Henderson:

{{STRUCTURE_1FAJ| PDB=1FAJ | SCENE=}}
== '''Inorganic Pyrophosphatase''' ==

Sandbox Reserved 320

2011-03-14T23:58:55Z

Sean Henderson:

{{Template:Sandbox_Reserved_BCMB307}}

{{STRUCTURE_1FAJ| PDB=1FAJ | SCENE=}}
== '''Inorganic Pyrophosphatase''' ==