il-2 signal peptide IL-2蛋白主要由活化的CD4阳性辅助T细胞产生 - Interleukin-2 structure best signal peptides for the expression of IL-2 The Crucial Role of the IL-2 Signal Peptide in Protein Secretion and Beyond

Myrmqllscialslalvtns The IL-2 signal peptide is a critical determinant in the efficient secretion of Interleukin-2 (IL-2), a vital cytokine produced by activated CD4-positive helper T-cells and to a lesser extent by activated CD8-positive T-cells and natural killer (NK) cells. Understanding the intricacies of this signal peptide is paramount for advancements in protein production, immunology, and therapeutic development. Research consistently highlights that modification of the IL-2 signal peptide augments protein secretion, both in vitro and in vivo, underscoring its significance.

What is a Signal Peptide?

At its core, a signal peptide is a short peptide sequence, typically ranging from 16 to 30 amino acids long, located at the N-terminus of a protein. Its primary function is to direct the nascent polypeptide chain to the secretory pathway. This process involves targeting the protein to the endoplasmic reticulum (ER) for translocation and subsequent processing, folding, and packaging for secretion out of the cell. The IL-2 signal peptide plays this essential role for the IL-2 protein.

The IL-2 Signal Peptide: Structure and Function

The IL-2 gene encodes for Interleukin-2, a protein crucial for immune responses. The IL-2 gene / cDNA is a protein-coding gene located on chromosome 4q27 and is conserved across various mammalian species, including chimpanzees, Rhesus monkeys, dogs, mice, and rats. The IL-2 signal peptide is a specific sequence within the precursor protein that initiates the secretion process. Studies have investigated the IL-2 signal peptide sequence and its variations to optimize protein expression. For instance, research has explored the best signal peptides for the expression of IL-2 in E.2016年5月2日—1. the gene of interest should be placed immediately after thesignal sequencefor the production with a native end. You don't need the ATG but can have it if ... coli, a common host for recombinant protein productionSecretory expression of the fusion protein composed of ....

A significant finding in the field is that alteration in the IL-2 signal peptide affects secretion of proteinsCommonly used leader peptide sequences for mammalian .... This has led to strategies where the commonly used signal peptide of IL-2 is modified to enhance secretion. The hydrophobic and basic domains of the IL-2 signal peptide have been identified as key areas where modifications can increase protein secretion in vitro. This understanding is crucial for researchers aiming for higher yields of secretable and nonsecretable interleukin 15 or other proteins using similar strategies.

Applications and Research Directions

The ability to manipulate and optimize the IL-2 signal peptide has far-reaching implications. It is widely used in the construction of expression plasmids, such as those containing the wild-type IL-2 signal peptide, which is consistently effective at increasing protein secretion in vitro and is a popular choice in commercial applications. These plasmids, like pcDNA3-IL-2 signal, are valuable tools for researchers.

Furthermore, the IL-2 signal peptide is not only important for Interleukin-2 itself but also serves as a benchmark for evaluating other signal peptides. For example, chimeric signal peptides incorporating elements from the IL-2 signal peptide alongside other sequences like BM40, HA, Insulin, CD33, or IFNA2 are being explored for enhanced protein production. The development of signal peptide replacements has shown to enhance expression and secretion.

The IL-2 signal itself is also significant in biological contexts.Chimeric signal peptides for protein production Blocking the IL-2 signal in vivo with an IL-2 antagonist has been shown to reduce tumor growth by controlling regulatory T cells.Increased Serum Interleukin-2 Levels Are Associated with Abnormal ... This highlights the broader impact of Interleukin-2 signaling pathways in immunity and disease. The IL-2 receptor binding activity is a key component of this signaling.

Tools and Resources for Signal Peptide Research

For those delving into signal peptide research, several resources are invaluable.IL-2 Signal for research use only. Not intended for any clinical use. Features: Facilitates secretion of proteins. Length: 60 bp. Type: Signal peptide. The Signal Peptide Database provides comprehensive information on various signal peptides, including those for Interleukin-2Commonly used leader peptide sequences for mammalian .... Tools like SignalP 62016年5月2日—1. the gene of interest should be placed immediately after thesignal sequencefor the production with a native end. You don't need the ATG but can have it if ....0 are instrumental in predicting signal peptides and their cleavage sites, aiding in the design of recombinant proteins.IL-2 Signal (CVCM82) Researchers can also find specific constructs like pcDNA3-IL-2 signal mFc (Plasmid #128042), which utilizes the IL-2 signal peptide for mammalian expression.

In summary, the IL-2 signal peptide is a fundamental element in protein secretionProtein Name, Interleukin-2; Gene, IL2 ; Organism Scientific, Lama glama ; Organism Common, Llama ; Lineage, Eukaryota Metazoa Chordata Craniata Vertebrata. Its structure, function, and the potential for its modification are central to numerous research endeavors aimed at improving protein yields, understanding immune regulation, and developing novel therapeutic strategies. The ongoing exploration of IL-2 signal peptide sequence variations and its integration with other protein engineering techniques promises further advancements in biotechnology and medicine.作者：Z Chen·1998—Secretory expression of the fusion protein composed of humanIL-2and PreS antigen of hepatitis B virus in mammalian cells. Bulletin; Published: May 1998.