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Proposal of the annotation of phosphorylated amino acids and peptides using biological and chemical codes

Molecules, ISSN: 1420-3049, Vol: 26, Issue: 3
2021
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Article Description

Phosphorylation represents one of the most important modifications of amino acids, peptides, and proteins. By modifying the latter, it is useful in improving the functional properties of foods. Although all these substances are broadly annotated in internet databases, there is no unified code for their annotation. The present publication aims to describe a simple code for the annotation of phosphopeptide sequences. The proposed code describes the location of phosphate residues in amino acid side chains (including new rules of atom numbering in amino acids) and the diversity of phosphate residues (e.g., di-and triphosphate residues and phosphate amidation). This article also includes translating the proposed biological code into SMILES, being the most commonly used chemical code. Finally, it discusses possible errors associated with applying the proposed code and in the resulting SMILES representations of phosphopeptides. The proposed code can be extended to describe other modifications in the future.

Bibliographic Details

Minkiewicz, Piotr; Darewicz, Małgorzata; Iwaniak, Anna; Turło, Marta

MDPI AG

Chemistry; Biochemistry, Genetics and Molecular Biology; Pharmacology, Toxicology and Pharmaceutics

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