Recombinant Viral HPV E6 Protein, CF

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Recombinant Viral HPV E6 Protein, CF Summary

Product Specifications

>98%, by SDS-PAGE under reducing conditions and visualized by Colloidal Coomassie® Blue stain.

Typical concentration to support E6AP-mediated p53 ubiquitination in vitro is 0.1-2 μM depending on experimental conditions.

E. coli-derived viral E6 protein
Met1 - Leu158 with a N-terminal Ser-His
Contains Cys to Ser substitutions at the following positions: 23, 58, 87, 104, 118, 147
Accession #
Predicted Molecular Mass
19 kDa

Product Datasheets

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Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.


Formulation Supplied as a solution in HEPES, NaCl, DTT.
Shipping The product is shipped with dry ice or equivalent. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 6 months from date of receipt, -70 °C as supplied.
  • 3 months, -70 °C under sterile conditions after opening.
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Background: E6

E6 (Early protein 6) is a viral protein produced in cells infected with the Human Papillomavirus. E6 forms a complex with the host cell ubiquitin ligase E6AP (E6-Associated-Protein) generating a ligase activity that polyubiquitinates tumor suppressors p53 and p73 and targets them to the 26S proteasome for degradation. As a result DNA damage and chromosomal instabilities increase, often leading to cell proliferation and cancer. The E6/E6AP complex also targets other substrates for ubiquitination, such as TERT, BAK1, FADD, and  pro-CASP8—none of which appear to be substrates for E6AP in the absence of E6. 

  1. Beaudenon S. & Huibregtse J.M. (2008) BMC Biochem. 9 (Supp1): S4.
  2. Zanier K., et al. (2007) Prot. Exp. & Purif. 51: 59.
  3. Zanier K., et al. (2010) J. Mol. Biol. 396: 90.
Long Name
Early Protein 6
Entrez Gene IDs
1489078 (Viral)
Alternate Names
E6; HpV16gp1

Citation for Recombinant Viral HPV E6 Protein, CF

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

1 Citation: Showing 1 - 1

  1. Identifying the ubiquitination targets of E6AP by orthogonal ubiquitin transfer
    Authors: Y Wang, X Liu, L Zhou, D Duong, K Bhuripanyo, B Zhao, H Zhou, R Liu, Y Bi, H Kiyokawa, J Yin
    Nat Commun, 2017-12-20;8(1):2232.
    Species: Yeast
    Sample Types: Recombinant Protein
    Applications: Bioassay


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