Recombinant Human ETHE1 Protein (His Tag)

Beta LifeScience SKU/CAT #: BLPSN-1943

Recombinant Human ETHE1 Protein (His Tag)

Beta LifeScience SKU/CAT #: BLPSN-1943
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Product Overview

Tag His
Host Species Human
Accession O95571
Synonym HSCO, YF13H12
Background ETHE1, also known as HSCO, is a sulfur dioxygenase that localizes within the mitochondrial matrix. ETHE1 probably plays an important role in metabolic homeostasis in mitochondria. It may also function as a nuclear-cytoplasmic shuttling protein that binds transcription factor RELA/NFKB3 in the nucleus and exports it to the cytoplasm. ETHE1 can suppresses p53-induced apoptosis by preventing nuclear localization of RELA. Mutations in ETHE1 gene result in ethylmalonic encephalopathy. Ethylmalonic encephalopathy is an autosomal recessive, invariably fatal disorder characterized by early-onset encephalopathy, microangiopathy, chronic diarrhea, defective cytochrome c oxidase (COX) in muscle and brain, high concentrations of C4 and C5 acylcarnitines in blood and high excretion of ethylmalonic acid in urine.
Description A DNA sequence encoding the human ETHE1 (O95571) (Leu13-Ala254) was expressed with a His tag at the N-terminus.
Source E.coli
Predicted N Terminal His
AA Sequence Leu13-Ala254
Molecular Weight The recombinant human ETHE1 consists of 257 a.a. and predicts a molecular mass of 28.3 KDa. It migrates as an approximately 28 KDa band in SDS-PAGE under reducing conditions.
Purity >90% as determined by SDS-PAGE
Endotoxin Please contact us for more information.
Bioactivity Please contact us for detailed information
Formulation Lyophilized from sterile PBS, pH 7.4..
Stability The recombinant proteins are stable for up to 1 year from date of receipt at -70°C.
Usage For Research Use Only
Storage Store the protein under sterile conditions at -20°C to -80°C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.

Target Details

Target Function Sulfur dioxygenase that plays an essential role in hydrogen sulfide catabolism in the mitochondrial matrix. Hydrogen sulfide (H(2)S) is first oxidized by SQRDL, giving rise to cysteine persulfide residues. ETHE1 consumes molecular oxygen to catalyze the oxidation of the persulfide, once it has been transferred to a thiophilic acceptor, such as glutathione (R-SSH). Plays an important role in metabolic homeostasis in mitochondria by metabolizing hydrogen sulfide and preventing the accumulation of supraphysiological H(2)S levels that have toxic effects, due to the inhibition of cytochrome c oxidase. First described as a protein that can shuttle between the nucleus and the cytoplasm and suppress p53-induced apoptosis by sequestering the transcription factor RELA/NFKB3 in the cytoplasm and preventing its accumulation in the nucleus.
Subcellular Location Cytoplasm. Nucleus. Mitochondrion matrix.
Protein Families Metallo-beta-lactamase superfamily, Glyoxalase II family
Database References
Associated Diseases Ethylmalonic encephalopathy (EE)
Tissue Specificity Ubiquitously expressed.

Gene Functions References

  1. observations indicate the severe impact of ETHE1 deficiency on cellular physiology and redox state PMID: 27074420
  2. ETHE1 is a major enzyme regulating endogenous glutathione persulfide /GS-(S)n-H and that its activity is controlled by polysulfidation of the Cys247 residue. PMID: 27742479
  3. ETHE1 R163W/R163Q mutations are associated with Ethylmalonic encephalopathy. PMID: 25198162
  4. Case Report: metabolic disturbances in 15-month-old male presenting with typical ethylmalonic encephalopathy associated with a homozygous ETHE1 mutation. PMID: 20978941
  5. T152I mutation of ETHE1 results in a 3-fold lower activity. PMID: 23144459
  6. role of the ETHE1 gene product in mitochondrial homeostasis and energy metabolism PMID: 14732903
  7. Mutations of ETHE1 were detected in all the typical ethylmalonic encephalopathy patients analysed, but no ETHE1 mutations were identified in patients presenting with early onset progressive encephalopathy with ethylmalonic aciduria. PMID: 16183799
  8. structural comparison of human ETHE1 and At1g53580 from Arabidopsis thaliana PMID: 16929096
  9. 14 patients with EE were investigated for mutations in the ETHE1 gene. Of the 14 patients, 5 were found to carry novel mutations. PMID: 18593870
  10. ETHE1 is a mitochondrial sulfur dioxygenase involved in catabolism of sulfide that accumulates to toxic levels in ethylmalonic encephalopathy. PMID: 19136963


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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.

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