Recombinant Human papillomavirus type 18 Protein E7 (E7)

Shipping Cost Note
Each Recombinant Protein price includes shipping cost to Canada and import fees. Please ask for a discounted quote if ordering multiple Cusabio products.
 
Delivery Time Note
This product is usually imported from the manufacturer after order placement. Please expect longer delivery times of 7-14 days.
 
Catalog No.
CSB-EP361948HMN
 
Product Name
Recombinant Human papillomavirus type 18 Protein E7 (E7)
 
In Stock
Yes
 
Activity
Not Tested
 
Research Area
Epigenetics and Nuclear Signaling
 
Uniprot ID
P06788
 
Gene Names
E7
 
Alternative Names
E7Protein E7
 
Organism
Human papillomavirus type 18
 
Source
E.coli
 
Expressed Region
1-105aa
 
Protein Length
Full Length
 
Tag Info
N-terminal 6xHis-tagged
 
Target Protein Sequence
MHGPKATLQDIVLHLEPQNEIPVDLLCHEQLSDSEEENDEIDGVNHQHLPARRAEPQRHTMLCMCCKCEARIKLVVESSADDLRAFQQLFLNTLSFVCPWCASQQ
 
MW
16 kDa
 
Purity
Greater than 90% as determined by SDS-PAGE.
 
Endotoxin
Not Tested.
 
Form
Liquid or Lyophilized powder
 
Buffer
If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol.
If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
 
Resonstitution
We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃. Our default final concentration of glycerol is 50%. Customers could use it as reference.
 
Storage
The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself. 
Generally, the shelf life of liquid form is 6 months at -20℃/-80℃. The shelf life of lyophilized form is 12 months at -20℃/-80℃.
 
Notes
Repeated freezing and thawing is not recommended. Store working aliquots at 4℃ for up to one week.
 
Relevances
E7 protein has both transforming and trans-activating activities. Disrupts the function of host retinoblastoma protein RB1/pRb, which is a key regulator of the cell cycle. Induces the disassbly of the E2F1 transcription factors from RB1, with subsequent transcriptional activation of E2F1-regulated S-phase genes. Inactivation of the ability of RB1 to arrest the cell cycle is critical for cellular transformation, uncontrolled cellular growth and proliferation induced by viral infection. Stimulation of progression from G1 to S phase allows the virus to efficiently use the cellular DNA replicating machinery to achieve viral genome replication. Interferes with histone deacetylation mediated by HDAC1 and HDAC2, leading to activation of transcription .
 
References
Interactions of SV40 large T antigen and other viral proteins with retinoblastoma tumour suppressor.Lee C., Cho Y.Rev. Med. Virol. 12:81-92(2002)
 
Function
Plays a role in viral genome replication by driving entry of quiescent cells into the cell cycle. Stimulation of progression from G1 to S phase allows the virus to efficiently use the cellular DNA replicating machinery to achieve viral genome replication. E7 protein has both transforming and trans-activating activities. Induces the disassembly of the E2F1 transcription factor from RB1, with subsequent transcriptional activation of E2F1-regulated S-phase genes. Interferes with host histone deacetylation mediated by HDAC1 and HDAC2, leading to transcription activation. Plays also a role in the inhibition of both antiviral and antiproliferative functions of host interferon alpha. Interaction with host TMEM173/STING impairs the ability of TMEM173/STING to sense cytosolic DNA and promote the production of type I interferon (IFN-alpha and IFN-beta)