In the evolving field of peptide research, few molecules have garnered as much interest as the p28 fragment derived from the bacterial protein azurin. As someone who follows advancements in peptide chemistry, I ha by A Joy·2026—Thep28 peptide residues in the sequence range of 1–4, 7–11, and 22–23are involved in masking the hydrophobic pocket of HDM2 by interacting Read more ve spent significant time reviewing the structural nuances of this fascinating molecule. Whe Oct 12, 2009—We report that amino acids 50 to 77 ofazurin(p28) preferentially enter the human breast cancer cell lines MCF-7, ZR-75-1, and T47D through Read more n we discuss the p28 azurin peptide sequence, we are looking at a highly specific 28 amino acid fragment of azurin that has become a cornerstone in understanding cell-penetrating behavior.
Understanding the Structure and Identity
The p28 molecule is essentially a segment of the azurin protein, which is a 128-amino acid cupredoxin secreted by *Pseudomonas aeruginosa*. My interest in this peptide began when I discovered its unique physical characteristics. Specifically, p28 is an amphipathic, α-helical, cell-penetrating peptide (often referred to as a CPP).
When analyzing the p28 sequence (28 aa), it corresponds precisely to residues Leu50–Asp77. The p28 domain (Leu50-Asp77) is responsible for its ability to traverse cellular boundaries. From a technical standpoint, this azurin-derived cell-penetrating peptide p28 is a 2.9 kD fragment. The primary sequence is often cited in literature as: Leu-Ser-Thr-Ala-Ala-Asp-Met-Gln-Gly-Val-Val-Thr-Asp-Gly-Met-Ala (followed by the remaining residues extending to Asp77).
Why the p28 Peptide Stands Out
In my research, I often encounter the term Azurin p28 peptide TFA, which represents the trifluoroacetate salt form commonly used in laboratory settings to ensure stability and solubility. The p28 is an amphipathic 2.9 kD fragment CPP derived from the protein azurin that exhibits a remarkable ability to interact with intracellular proteins.
One of the most compelling aspects of this peptide P28 is its interaction with p53. It is widely documented that azurin/p28 stabilizing p53 is a key mechanism of interest for biochemists. Because p28 is a 28-amino acid peptide fr Azurin p28 peptide TFA agment that mimics certain binding motifs, it effectively acts as a peptide that replicates an amino acid sequence of the p53 binding protein azurin.
Technical Specifications
For those tracking the structural interactions, it is worth noting that p28 peptide residues in the sequence range of 1–4, 7–11, and 22–23 are critical for its functional binding capabilities. The p28 (aa 50–77; Leu50-Asp77) configuration allows it to maintain its α-helical structure, which is vital for its role as an Azurin p28 peptide.
Personal Observations on Peptide Research
Working with or studying azurin and its peptide p28 requires a deep appreciation for molecular weight and secondary structure. The p28 is derived from Azurin, a 128 amino acid Cupredoxin, and its stability is often a point of discussion in biochemical circles. Whether you are looking at the p28 molecule for its mechanical properties or its unique helical folding, the consistency of the p28 sequence (28 aa) remains a reliable standard in peptide synthesis.
In summary, the p28 azurin peptide sequence serves as a vital model for understanding how small, amphipathic fragments derived from larger bacterial proteins can exhibit such high specificity. As a tool for biochemical inquiry, the Azurin p28 pepti by A Yaghoubi·2020·Cited by 59—One peptide,p28 (aa 50–77; Leu50-Asp77) of azurin appears to act as both the PTD and the effective inhibitor of cancer cell proliferation (21). Shorter Read more de continues to be a subject of intense study for anyone curious a Azurin and its protein subunit P28 as an alternative bout the intersection of bacterial proteins a by NA Zaghloul·2025·Cited by 7—The anticancer potential of azurin is attributed to thep28 domain (Leu50-Asp77), a peptide responsible for cellular uptake. This domain Read more nd structural biology.