Recombinant Human ERH Protein (His Tag)

Beta LifeScience SKU/CAT #: BLPSN-1912

Recombinant Human ERH Protein (His Tag)

Beta LifeScience SKU/CAT #: BLPSN-1912
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Product Overview

Tag His
Host Species Human
Accession P84090
Synonym DROER
Background ERH(enhancer of rudimentary homolog) belongs to the E(R) family. It is expressed in all tissues examined. The monomeric structure of ERH comprises a single domain consisting of three alpha-helices and four beta-strands, which is a novel fold. In the crystal structure, ERH assumes a dimeric structure, through interactions between the beta-sheet regions. The formation of an ERH dimer is consistent with the results of analytical ultracentrifugation. ERH may have a role in the cell cycle. The Drosophila protein ERH is a small protein of 14 amino acids. It has been found to be an enhancer of the rudimentary gene, involved in pyrimidine biosynthesis. From an evolutionary point of view, ERH is highly conserved and has been found to exist in probably all multicellular eukaryotic organisms. ERH interacts with POLDIP3.
Description A DNA sequence encoding the mature form of human ERH (P84090) (Met1-Lys104) was expressed with a His tag at the N-terminus.
Source E.coli
Predicted N Terminal His
AA Sequence Met1-Lys104
Molecular Weight The recombinant human ERH consists of 119 a.a. and predicts a molecular mass of 14.1 KDa. It migrates as an approximately 14 KDa band in SDS-PAGE under reducing conditions.
Purity >95% as determined by SDS-PAGE
Endotoxin Please contact us for more information.
Bioactivity Please contact us for detailed information
Formulation Lyophilized from sterile 20mMTris, 0.1M NaCl, 1mM DTT, 20% glycerol 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 May have a role in the cell cycle.
Subcellular Location Nucleus.
Protein Families E(R) family
Database References
Tissue Specificity Expressed in all tissues examined.

Gene Functions References

  1. Data suggest that ERH interacts directly in nucleus with C-terminal Arg-Gly-rich region of SAFB1/SAFB2 and this multimer co-localizes in insoluble nuclear fraction; binding of ERH reverses inhibition exerted by SAFB1/SAFB2 on SRPK1. (ERH = enhancer of rudimentary homolog protein; SAFB = scaffold attachment factor B; SRPK1 = splicing kinase SR protein kinase-1) PMID: 28627136
  2. ERH regulation of RNA processing is needed to ensure faithful DNA replication and repair. PMID: 26100022
  3. REVIEW: recent findings indicate that ERH plays an important role in cell cycle through its mRNA splicing activity and is critically required for genomic stability and cancer cell survival PMID: 24078386
  4. Identification of amino acid residues of ERH required for its recruitment to nuclear speckles and replication foci PMID: 24015320
  5. Evolutionarily conserved protein ERH controls CENP-E mRNA splicing and is required for the survival of KRAS mutant cancer cells. PMID: 23236152
  6. ERH contributes to chromosome alignment at the metaphase plate by localizing CENP-E at kinetochore regions. PMID: 22704934
  7. molecular structure, dimerization and protein-protein interactions PMID: 15794639
  8. ERH may be an important transcription regulator that also functions in the control of cell-cycle progression. PMID: 17444515
  9. interaction with ERH could block the binding of p21(Cip1/Waf1) by Ciz1 in the cell. When ERH and Ciz1 are coexpressed in HeLa cells, Ciz1 recruits ERH to DNA replication foci PMID: 18081865
  10. Enhancer of rudimentary homolog (ERH) overexpression may be implicated in the initiation and/or progression of certain human malignancies. PMID: 18500978


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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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