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Human RRM2B / P53R2 Protein (His Tag)

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RRM2B/P53R2Protein Product Information
Synonym:DKFZp686M05248, MGC102856, MGC42116, MTDPS8A, MTDPS8B, P53R2
Protein Construction:A DNA sequence encoding the human RRM2B (Q7LG56-1) (Met 1-Phe 351) was expressed, with a polyhistide tag at the N-terminus.
Expressed Host:E. coli
Form & Shipping:In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
RRM2B/P53R2Protein QC Testing
Purity:> 92 % as determined by SDS-PAGE
Bio-Activity:Measured by its ability to bind TP53 in a functional ELISA.
Endotoxin:Please contact us for more information.
Stability:Samples are stable for up to twelve months from date of receipt at -70℃
Predicted N Terminal:Met
Molecule Mass:The recombinant human RRM2B consisting of 366 amino acids and has a calculated molecular mass of 42.6 kDa. It migrates as a 43 kDa band in SDS-PAGE under reducing conditions as predicted.
Formulation:Lyophilized from sterile PBS, 30% glycerol, pH 8.5
1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
2. Please contact us for any concerns or special requirements.
RRM2B/P53R2Protein Usage Guide
Storage:Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Reconstitution:A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.

Ribonucleoside reductase subunit M2B, also known as RRM2B or p53R2, is an enzyme belonging to the iron-dependent ribonucleotide reductase (RNR) enzyme family which is essential for DNA synthesis. Ribonucleotide reductase (RNR) is an enzyme that catalyzes the formation of deoxyribonucleotides from ribonucleotides and plays a critical role in regulating the total rate of DNA synthesis so that DNA to cell mass is maintained at a constant ratio during cell division and DNA repair. RRM2B is a phosphorylated protein. It is hypothesized that RRM2B activity can be regulated at the posttranslational level in response to DNA damage. RRM2B has previously been shown to be essential for the maintenance of mtDNA copy number and its candidacy for tumor suppression has been evaluated in several mutational analyses of different cancer types. However, the contribution of RRM2B to the DNA damage response has been questioned because its transcriptional induction upon DNA damage is not rapid enough for prompt DNA repair. Instead, ATM-mediated phosphorylation has been suggested to regulate the DNA repair activity of RRM2B posttranslationally. In addition, a defect in RRM2B can induce a mild muscle disease of adult onset through disturbance of mitochondrial homeostasis but that this defect does not appear to be oncogenic. 

  • Bourdon A, et al. (2007) Mutation of RRM2B, encoding p53-controlled ribonucleotide reductase (p53R2), causes severe mitochondrial DNA depletion. Nature Genetics. 39: 776-80.
  • Tyynismaa H, et al. (2009) A Heterozygous Truncating Mutation in RRM2B Causes Autosomal-Dominant Progressive External Ophthalmoplegia with Multiple mtDNA Deletions. AJHG. 85 (2) : 290-5.
  • Shaibani A, et al. (2009) Mitochondrial neurogastrointestinal encephalopathy due to mutations in RRM2B. Arch Neurol.66 (8): 1028-32.
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