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P2621 Sigma-Aldrich

Phosphomannose Isomerase from Escherichia coli

recombinant, expressed in E. coli, ammonium sulfate suspension, ≥50 units/mg protein

Synonym: D-Mannose-6-phosphate ketol-isomerase, Mannose Phosphate Isomerase, PMI



Related Categories 5.3.x.x Intramolecular oxidoreductases, 5.x.x.x Isomerases, Biochemicals and Reagents, Enzyme Class Index, Enzymes, Inhibitors, and Substrates More...
recombinant   expressed in E. coli
form   ammonium sulfate suspension
storage temp.   2-8°C



PMI is used to study cell wall synthesis and energy production. PMI has been used to study how EDTA and metal ions, such as Zn++, Co++, Fe++, Mn++ and Cu++., can affect recovery and thermal stability. It may be used to study PMI′s effect on various alginate biosynthetic enzymes such as phosphomannomutase (PMM), GDP-mannose pyrophosphorylase (GMP), and GDP-mannose dehydrogenase (GMD).

Biochem/physiol Actions

Phosphomannose Isomerase (PMI) catalyses the interconversion of mannose 6-phosphate (Man-6-P) and fructose 6-phosphate (Fru-6-P), which provides a link between glucose metabolism and mannosylation.


Bottomless glass bottle. Contents are inside inserted fused cone.

Unit Definition

One unit will convert 1.0 μmole of D-mannose 6-phosphate to D-fructose 6-phosphate per min at pH 7.6 at 25 °C, using a coupled enzyme system with phosphoglucose isomerase and glucose-6-phosphate dehydrogenase.

Physical form

Supplied as a suspension in 3.2 M ammonium sulfate

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Protocols & Articles


Ammonium Sulfate Suspensions - Technical Note

Note that for an ammonium sulfate suspension, most of the enzyme will be in solid form. It is likely that only negligible amounts of enzyme will be in the ammonium sulfate solution.
Keywords: Enzyme activity

Related Content

Enzymes & Proteins

Application Index | Enzyme Index | Substrate Index | Inhibitor Index | Cofactor Index | Lectin Index
Keywords: Cell signaling, Diagnostic, Drug discovery, Metabolomics, Molecular biology

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