Recombinant Enterobacteria phage T7 Single-stranded DNA-binding protein gp2.5(2.5)

Code CSB-EP366021EEB
Size US$2466Purchase it in Cusabio online store
(only available for customers from the US)
  • (Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.

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Product Details

Purity Greater than 90% as determined by SDS-PAGE.
Target Names 2.5
Uniprot No. P03696
Alternative Names 2.5Single-stranded DNA-binding protein gp2.5; SSB protein
Species Enterobacteria phage T7 (Bacteriophage T7)
Source E.coli
Expression Region 1-232aa
Note: The complete sequence including tag sequence, target protein sequence and linker sequence could be provided upon request.
Mol. Weight 41.9kDa
Protein Length Full Length
Tag Info N-terminal 6xHis-SUMO-tagged
Form Liquid or Lyophilized powder
Note: We will preferentially ship the format that we have in stock, however, if you have any special requirement for the format, please remark your requirement when placing the order, we will prepare according to your demand.
Buffer If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol.
Note: If you have any special requirement for the glycerol content, please remark when you place the order.
If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
Reconstitution 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°C/-80°C. Our default final concentration of glycerol is 50%. Customers could use it as reference.
and FAQs
Protein FAQs
Storage Condition Store at -20°C upon receipt, aliquoting is necessary for mutiple use. Avoid repeated freeze-thaw cycles.
Shelf Life 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°C/-80°C. The shelf life of lyophilized form is 12 months at -20°C/-80°C.
Lead Time Delivery time may differ from different purchasing way or location, please kindly consult your local distributors for specific delivery time.
Notes Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.
Datasheet & COA Please contact us to get it.

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1. I am wondering if any sort of DNA binding activity has been verified prior to shipping?
2. What is the purification protocol for these proteins?
3. Does the recombinant SSB expressed in E. coli still retain the His-Sumo tag? Or is it cleaved?

Thanks for your inquiry. Please kindly check the product details, code, name, tag type, especially expression sequence, and confirm which protein you actually want.
We have also provided Uniprot link for you reference, so you will be more clear about the difference between the two products and make your decision.
1. Code: CSB-EP366021EEB
Name: Recombinant Enterobacteria phage T7 Single-stranded DNA-binding protein gp2.5 (2.5)
Expression Region: 1-232aa, Full Length
Tag Info: N-terminal 6xHis-SUMO-tag
Expression Sequence:


Uniprot Link:
2. Code: CSB-EP321793EDY
Name: Recombinant Enterobacteria phage T3 Helix-destabilizing protein (2.5)
Expression Region: 1-232aa, Full Length
Tag Info: N-terminal 10xHis-tagged and C-terminal Myc-tagged
Expression Sequence:


Uniprot Link:
Note: CSB-EP321793EDY is a semi-customized protein instead of developed protein, so the price will be relatively higher and the smallest size will be 50ug.
Shipping format: The default delivery form is liquid form. If you have demand for lyophilized form, please remark this requirement when placing order.
Optional service: Do you want aseptic processing and/or endotoxin removal for this protein (recommended for cell culture or in vivo use)?
With our endotoxin removal service we guarantee the endotoxin level to be less than 0.1ng/ug (1EU ug).
Both aseptic processing and endotoxin removal services are free of charge, however they must be requested when the order is placed.
Shipping condition: These products are routinely shipped on ice packs.
Free Service: Endotoxin removal, Filter-sterilization, Lyophilization (Note: Lyophilization and filter-sterilization can’t be met at the same time)

Target Data

Function Single-stranded DNA-binding protein that eliminates secondary structure in long ssDNA formed on the lagging strand of the replication fork. Stimulates DNA polymerase activity and increases the efficiency of RNA primer synthesis by interacting with the DNA polymerase and the helicase/primase protein gp4. Disrupts loops, hairpins and other secondary structures present on ssDNA to reduce and eliminate pausing of viral DNA polymerase at specific sites during elongation.
Gene References into Functions
  1. analysis of the interaction of the single-stranded DNA-binding protein of bacteriophage T7 with the DNA polymerase-thioredoxin complex PMID: 20375019
  2. results support a model in which dimerization interactions must be broken for DNA binding, and gp2.5 monomers search dsDNA by 1D diffusion to bind ssDNA. PMID: 18772224
Database Links

KEGG: vg:1261080


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