In the field of molecular biology and immunology research, the gp70 peptide—often referred to as the AH1 peptide—serves as a cornerstone for studying antigen-specific responses. As someone who has spent significant time evaluating various reagents for laboratory workflows, I have found that understanding the structural and functional nuances of this nonamer is essential for successful experimentation.
Defining the gp70 Peptide (AH1)
The AH1 sequence (SPSYVYHQF) is a well-characterized nonmutated nonamer peptide derived from envelope glycoprotein 70 (gp70). This protein originates from the envelope of an endogenous ecotropic murine leukemia virus (MuLV). Because AH1 derives from the envelope protein (gp70), it has become a standard tool for researchers investigating MHC class I-restricted immune recogn Product Info | Immudex ition.
In my experience, the precision of the peptide synthesis is paramount. Most high-quality suppliers provide this sequence at >95% purity, which is critical when using it as an epitope peptide derived from the envelope protein (gp70) in sensitive assays.
Technical Specifications and MHC Binding
The interaction between the peptide and the major histocompatibility complex is a primary focus for many laboratories. The AH1 sequence is recognized as a high-affinity binding peptide specifically for the H-2Ld molecule.
* Sequence: SPSYVYHQF
* Classification: Class I MHC restricted epitope
* Biological Context: The GP70423–431, also called the AH1 peptide, is frequently utilized in studies invo Cancer Antigenic Peptide Database lving CT26 cell gp100 (25-33) is a H-2Db restricted epitope. gp100 (25-33) activate specific CD8+ T cells capable of recognizing B16 melanoma over other melanocytes. lines, which are known to express this endogenous biomarker.
When evaluating peptides for these studies, one must consider the binding affinity. My observations align with existing data that AH1 is a high-a Jul 19, 2004 — signal peptide ; chain, Envelope glycoprotein gp70 ; chain, Surface protein ; chain, Transmembrane protein ; transmembrane region, potential ffinity binding peptide of H-2Ld, making it an excellent candidate for generating tetramers. These tetramer complexes are invaluable, as they enable researchers to detect and measure the gp70 antigen and associated T-cells at the single-cell level.
Comparative Context: gp70 vs. Other Epitopes
While the gp70-derived AH1 peptide is a standard for murine models, it is often compared to other well-known epitopes. For instance, gp100 (25-33) is a H-2Db restricted epitope used in different melanoma models. Just as gp100 (Met219) is a high quality epitope peptide used for stimulation, the AH1 reagent must be validated for its ability to reflect the nonmutated H-2Ld-restricted peptide antigen derived from gp70 amino acids 423–431.
Practical Applications in the Laboratory
Whether you are using flow cytometry, ELISA, or immunohistochemistry, Gp70 protein - Murine leukemia virus (MuLV) | UniProtKB the quality of your reagents dictates the reliability of your data.
1. Tetramer Staining: Utilizing a gp70-derived AH1 peptide tetramer allows for the tracking of specific immune cells.
2. Antibody Validation: Antibodies that detect Feline Leukemia Virus gp70 or murine variants are often used alongside these peptides to verify the presence of the envelope glycoprotein gp70 in various biological samples.
3. Data Resources: For those looking to verify sequ Jun 25, 2020 — MHC-peptide tetramer complexes detect antigen specific T-cells at the single cell level, allowing for accurate measurements of the functional immune response ences or protein functions, UniProt remains the gold standard Dendritic Cells Transduced with Tumor-Associated Antigen for accessing comprehensive protein sequence data.
Conclusion
The study of the gp70 peptide continues to provide deep insights into how the virus attaches the virus to the host cell by binding to its receptor. By maintaining rigorous standards in selecting product information and high-purity peptides, researchers can consistently achieve reproducible results in their immunological investigations. Whether you are performing basic characterization or complex functional assays, the AH1 peptide (gp70 H2-Ld-restricted epitope) remains an indispensable asset in the modern research toolkit.