SV40 Nuclear Transport Signal Peptide Analog

The SV40 Nuclear Transport Signal Peptide Analog, CGYGPKKKRKVGG, is a synthetic peptide derived from the SV40 large T antigen's nuclear localization signal (NLS). This peptide is commonly used in scientific studies due to its ability to transport molecules across the nuclear membrane. The sequence PKKKRKV is crucial for binding to nuclear import receptors and mediating transport through nuclear pores.

Functions and Applications:

1. Nuclear Transport: This peptide functions as a cell-penetrating sequence that facilitates the delivery of large molecules, such as proteins and nucleic acids, into the cell nucleus. It is widely employed in gene therapy, particularly in delivering CRISPR-Cas9 complexes and plasmid DNA, ensuring that genome editing tools reach the nuclear DNA target efficiently?.

2. Research in Gene Editing: SV40 NLS peptides are integral to optimizing genome editing systems like CRISPR-Cas9. By fusing the peptide to Cas9 or other DNA-editing enzymes, researchers enhance their ability to localize in the nucleus, improving the efficiency of gene editing in various cells, including stem cells and embryos. This peptide’s utility extends to increasing the success rate of gene editing in biomedical research, therapeutic development, and molecular biology.

3. Drug Delivery and Research: In drug discovery and development, the SV40 NLS peptide analog is employed in studies to enhance nuclear delivery of therapeutic agents, such as proteins or nucleic acids, for targeting diseases at the genetic level. This application is particularly critical in researching treatments for genetic disorders, cancers, and viral infections where precise nuclear localization is required.?

The SV40 Nuclear Transport Signal Peptide Analog is a valuable tool in molecular biology and therapeutic research, particularly for improving the efficiency of genome editing and targeted drug delivery.

SV40 Nuclear Transport Signal Peptide Analog is a 13-residue synthetic peptide with the sequence Cys-Gly-Tyr-Gly-Pro-Lys-Lys-Lys-Arg-Lys-Val-Gly-Gly. C-terminal amidation removes the terminal carboxylate charge. The sequence contains 1 cysteine residue, providing potential thiol/disulfide chemistry when the thiol is available; contains 4 Lys and 1 Arg residues, contributing cationic character; is Gly/Pro-rich, a composition that can influence local backbone flexibility. These sequence-derived properties describe the reagent chemically; no specific receptor, enzyme, pathway, disease association, or biological activity is assigned without product-specific experimental evidence.

• thiol-selective conjugation or immobilization studies
• LC-MS/HPLC analytical method development
• sequence-specific assay controls

Sequence-derived chemical properties support reagent selection and experimental planning but do not establish biological function. Solubility, aggregation, adsorption, conjugation efficiency, and assay performance should be validated under the intended experimental conditions.