Ribosome The topic of peptide nitrogen delves into the fundamental chemical structure of peptides, focusing on the crucial role of the nitrogen atom within the peptide bond. This nitrogen atom, central to the formation and properties of peptides and proteins, influences their reactivity, structural integrity, and biological functions.作者：KA Pittman·1964·被引用次数：231—Most of thenitrogenpresent in these compounds was utilized. However, the organism did not utilizenitrogenfrom any of 12 dipeptides, triglycylglycine, ... Understanding peptide nitrogen is essential in fields ranging from biochemistry and molecular biology to nutrition and materials science, where peptides serve as vital components or are utilized for specific applications.
At the heart of peptide chemistry lies the peptide bond, a specific type of amide linkage formed between the carboxyl group of one amino acid and the amino group of another. The formation of this bond releases a molecule of water and results in the characteristic -CO-NH- structure.作者：EJ Milner‐White·1997·被引用次数：88—As a consequence, it is often believed that thenitrogenatom has a net positive charge. This is in apparent contradiction with the partial ... The nitrogen atom within this bond is not a simple amine nitrogen; its electronic environment is significantly altered by resonance.
The nitrogen atom in a peptide bond possesses a lone pair of electrons that can delocalize into the adjacent carbonyl group.Peptide Design: Principles & Methods | Thermo Fisher Scientific - US This delocalization leads to a partial double bond character between the carbon and nitrogen atoms, making the peptide bond planar and rigid.Effect of Non-Peptide and Non-Protein Nitrogen ... This resonance also results in a partial negative charge on the oxygen atom of the carbonyl group and a partial positive charge on the nitrogen atom, a concept that has been a subject of detailed study. Contrary to initial assumptions of a net positive charge on the nitrogen, its electron-withdrawing nature and participation in resonance contribute to its unique chemical properties, including the abolition of its nucleophilicityAmino Group | Structure, Formula & Examples - Lesson - Study.com.
Nitrogen is an indispensable element in peptides, making up a significant portion of their molecular structure. The total nitrogen content in a sample can often be used as a proxy for peptide or protein concentration, particularly in lyophilized powders where the peptidic material is the primary or sole source of nitrogen2015年11月5日—TargetPeptide. Amino Acid Analysis;.PeptideContent Analysis (Nitrogen. Element Analysis);. HPLC Analysis.PeptideImpurities. Counter-ion.. This principle is utilized in analytical methods for determining peptide content, such as nitrogen element analysis.
Beyond its structural role, proteinaceous and peptidic nitrogen represents a crucial nutrient source in various biological systems. In soil science, it is recognized as a potential direct nutrient for plants and microbes, highlighting the biological significance of nitrogen in peptide metabolism. Similarly, in nutritional contexts, dietary peptides can be utilized by organisms, with the efficiency of nitrogen assimilation depending on factors like the specific peptides and the organism's metabolic capabilities.
The unique properties conferred by the nitrogen atom in peptide bonds open avenues for diverse applications and ongoing research. For instance, nitrogen arylation techniques are being developed for the synthesis of complex macrocyclic peptides, showcasing the utility of specific nitrogen atoms in targeted chemical transformationsNet peptide content analysis without compromise. In materials science, nitrogen-containing peptides can play roles in stabilizing nanostructures or directing their formation, demonstrating their potential in advanced material design.
Furthermore, the precise chemical modification of nitrogen atoms within peptides, such as methylation, is an area of active research, with molecular mechanisms being elucidated to understand enzymatic processesTransannular Reactions of Peptides. The Peptide Nitrogen in .... The chemical environment of the peptide nitrogen, including its ligand field properties, is also studied to understand interactions with metal ions, which is relevant in various biochemical and catalytic processesThe Determination of Peptide and Basic Forms of Nitrogen.
In summary, peptide nitrogen is a pivotal element in understanding the structure, function, and applications of peptides.作者：JH Choi·1992·被引用次数：58—An eπ value of 502 cm−1for thepeptide nitrogenindicates that it is a weak net π-donor to chromium(III), presumably because donation from the filled π-orbital ... From the resonance stabilization of the peptide bond and its impact on molecular conformation to its role as a vital nutrient source and a target for chemical modification, the nitrogen atom is intrinsically linked to the multifaceted nature of peptides25.5: Peptides and Proteins. Continued exploration into the chemistry and biology of peptide nitrogen promises further advancements in biochemistry, medicine, and materials science.作者：H Yamashita·1994·被引用次数：12—The significance of the absorption at 2170 nm due topeptidebonds for the determination of protein content by near infrared (NIR) spectroscopy was evaluated by ...
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