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SRE0024 Sigma-Aldrich

Glyceraldehyde-3-phosphate dehydrogenase human

recombinant, expressed in Escherichia coli

Synonym: D-Glyceraldehyde-3-phosphate: NAD+ oxidoreductase (phosphorylating), GAPDH, Triosephosphate dehydrogenase

  •  Enzyme Commission (EC) Number

  •  NACRES NA.54



Related Categories Cell Biology, Glycolysis, Glycolysis Enzymes, Metabolic Pathways, Metabolomics More...
Quality Level   200
recombinant   expressed in E. coli
activity   ≥80 units/mg protein
storage temp.   −20°C


General description

Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) localizes to the cytoplasm but can be translocated to the nucleus depending on cellular conditions. It is a tetramer containing identical chains. The gene encoding GAPDH is localized on human chromosome 12p13.


Human glyceraldehyde-3-phosphate dehydrogenase has been used as a positive control for hydrogen sulfide treatment to detect sulfhydration of protein targets.

Biochem/physiol Actions

Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) catalyzes the reversible oxidative phosphorylation of glyceraldehyde-phosphate, which is a critical energy-yielding step in carbohydrate metabolism. It binds to several proteins including actin, tubulin, amyloid precursor, polyglutamine peptides, DRPLA (dentatorubral-pallidoluysian atrophy) and huntingtin. Phosphorylated GAPDH associates with cytoskeletal elements and controls microtubule dynamics in the early secretory pathway. GAPDH is also a component of the functional GAIT (interferon-?-activated inhibitor of translation) mRNP (messenger ribonucleoprotein). GAPDH expression is dysregulated during melanoma progression.

Unit Definition

One unit will reduce 1.0 μmole of 3-phosphoglycerate to D-glyceraldehyde 3-phosphate per minute in a coupled system with 3-phosphoglyceric phosphokinase (3-PGK) at pH 7.6 at 25 °C

Physical form

This product is recombinant, human GAPDH expressed in E. coli with an N-terminal histidine tag and has a predicted molecular mass of 37,984 Da. The product is lyophilized from a buffered solution with stabilizers.

Other Notes

Alternative number: CAS Number 9001-50-7

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable
Protocols & Articles
Peer-Reviewed Papers


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