Phenylalanylglycine combines aromatic phenylalanine with flexible glycine to demonstrate contrasting conformational tendencies. The dipeptide supports studies of hydrophobic packing and backbone mobility. Researchers employ it as a model in enzymatic specificity and peptide-assembly research. Applications extend to synthetic chemistry, folding behavior analysis, and ligand-design studies.
CAT No: R2629
CAS No:721-90-4
Synonyms/Alias:Phe-gly;H-PHE-GLY-OH;721-90-4;Phenylalanylglycine;Phe-Gly hydrate;l-Phenylalanyl-glycine;L-Phenylalanylglycine;2-[[(2S)-2-amino-3-phenylpropanoyl]amino]acetic acid;CHEMBL417979;CHEBI:73635;(S)-2-(2-amino-3-phenylpropanamido)acetic acid;2-[(2S)-2-amino-3-phenylpropanamido]acetic acid;phenylalanyl-glycine;MFCD00021728;FG dipeptide;F-G Dipeptide;L-Phe-Gly;glycine, phenylalanyl-;(S)-Phenylalanylglycine;L-Phenylalanyl-L-Glycine;N-(L-phenylalanyl)glycine;Phenylalanine Glycine dipeptide;Phenylalanine-Glycine dipeptide;SCHEMBL1329817;DTXSID901315619;FG;BDBM50139894;AT16962;HY-W141936;BS-29332;DA-64249;PD119121;CS-0201727;(2-Amino-3-phenyl-propionylamino)-acetic acid;EN300-151353;((S)-2-Amino-3-phenyl-propionylamino)-acetic acid;((S)-3-Amino-2-oxo-4-phenyl-butylamino)-acetic acid;{[(2S)-2-Amino-3-phenylpropanoyl]amino}acetic acid;Q27142685;F-G;
Phenylalanylglycine, also known as Phe-Gly, is a dipeptide composed of the amino acids phenylalanine and glycine linked via a peptide bond. This compound is notable for its structural simplicity and versatility, making it a valuable tool in biochemical research and peptide synthesis. Its unique combination of aromatic and small, non-polar residues allows it to serve as a model system for understanding peptide behavior, including folding, stability, and interaction with enzymes or receptors. The presence of the phenylalanine moiety imparts hydrophobic characteristics, while the glycine residue introduces flexibility, enabling the dipeptide to adopt various conformations. Researchers often utilize Phenylalanylglycine to investigate fundamental aspects of peptide chemistry and to develop new methodologies for peptide modification and analysis.
Peptide Synthesis Research: In the field of peptide synthesis, Phenylalanylglycine serves as a representative substrate for studying coupling efficiency, protecting group strategies, and purification techniques. Its well-defined structure allows chemists to optimize solid-phase or solution-phase synthesis protocols, assess the impact of different reagents, and refine conditions for the assembly of longer peptide chains. By examining the reactivity and solubility of Phe-Gly, researchers can draw conclusions applicable to more complex peptides, thus accelerating the development of novel synthetic approaches. The dipeptide's compatibility with various analytical methods, such as HPLC and mass spectrometry, further enhances its utility as a standard or reference compound in synthetic studies.
Enzymatic Activity Assays: Phenylalanylglycine is frequently employed in enzymology to evaluate the substrate specificity and catalytic mechanisms of peptidases and proteases. By monitoring the hydrolysis of this dipeptide, scientists can quantify enzyme activity, characterize kinetic parameters, and screen for potential inhibitors or activators. The presence of both aromatic and simple residues in Phe-Gly makes it a useful probe for distinguishing between different classes of proteolytic enzymes. Additionally, modifications to the peptide bond or side chains can be systematically explored using this model compound, providing insight into enzyme-substrate interactions and guiding the design of more selective enzyme assays.
Structure-Activity Relationship Studies: SAR investigations often utilize Phenylalanylglycine to dissect the contributions of specific amino acid residues to biological function or molecular recognition. By comparing the properties of Phe-Gly with related dipeptides or analogs, researchers can elucidate the roles of hydrophobicity, steric factors, and backbone flexibility in modulating activity. Such studies are instrumental in the rational design of bioactive peptides, peptide-based inhibitors, or molecular probes. The simplicity of the dipeptide framework enables systematic variation and facilitates the interpretation of experimental results, thereby advancing our understanding of peptide-mediated interactions.
Analytical Method Development: Analytical chemists leverage Phenylalanylglycine as a calibration standard or test compound when developing and validating chromatographic, spectroscopic, or electrophoretic techniques. Its distinct physicochemical properties make it suitable for assessing method sensitivity, selectivity, and reproducibility. In particular, Phe-Gly is valuable in the optimization of separation conditions for peptide mixtures, as well as in the evaluation of detection limits and quantification accuracy. The availability of a well-characterized dipeptide enhances confidence in analytical results and supports the establishment of robust protocols for peptide analysis.
Biophysical Characterization: The study of Phenylalanylglycine extends to the realm of biophysics, where it is used to investigate peptide folding, aggregation, and conformational dynamics. Researchers utilize techniques such as NMR spectroscopy, circular dichroism, and molecular modeling to probe the structural preferences and stability of this dipeptide under various conditions. Insights gained from these studies contribute to a broader understanding of protein folding principles and the factors that govern peptide self-assembly. Furthermore, Phe-Gly serves as a model system for exploring solvent effects, intermolecular interactions, and the influence of sequence composition on peptide behavior, thereby informing the design of functional biomaterials and peptide-based nanostructures.
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