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The chemical conversion of arginine to citrulline, known as citrullination or deimination. Citrullination or deimination is the conversion of the amino acid arginine in a protein into the amino acid citrulline.Citrulline is not one of the 20 standard amino acids encoded by DNA in the genetic code.Instead, it is the result of a post-translational modification.
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BetaThe peptide arrays each contained 75,460 17-amino-acid peptides from the following groups: citrullinated sites and their unmodified counterparts, peptides with multiple citrullination sites on the ...
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BetaEnzymatic conversion of positively charged arginine into neutral citrulline. The loss of a positive charge caused by citrullination results in electrostatic and conformational changes of the modified protein, affecting its function by altering binding sites, protein–protein interaction and susceptibility to degradation [15, 16].Citrullination substantially lowers the amino acid isoelectric ...
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BetaCitrullination is the conversion of the amino acid arginine in a protein into the amino acid citrulline. Citrulline is not one of the 20 standard amino acids encoded by DNA in the genetic code. Instead, it is the result of a post-translational modification. This process is catalysed by peptidyl arginine deiminase (PAD) enzymes.
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BetaThe conversion of arginine (Arg) to citrulline (Cit) changes the charge of the amino acid (Fig. 1).Arginine is strongly basic (pI . ∼ 10.76) due to the presence of a guanidino group that could easily be protonated at physiological pH.. The removal of the imino moiety (a transformation referred to as deimination) is an enzymatic reaction catalyzed by peptidylarginine deiminases (PAD).
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BetaIn addition, we observe an enrichment of glycine within the amino acids neighboring the citrullinated R, conceivably for affording structural stabilization of the substrate for citrullination. Finally, given that noncitrullinated arginines are found in the vicinity of the citrullinated arginine is a further indication for the topological specificity of citrullination events.
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BetaThe products of this process are citrullinated proteins, which contain a nonessential amino acid, citrulline. The immune system can recognize the deiminated or citrullinated proteins as nonself-antigens and so mount an autoimmune response.
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BetaCitrullination is a post-translational modification (PTM) that involves the hydrolysis of the positively charged guanidium group on arginine to generate a neutral urea (Fig. 1a) 1.Citrullination ...
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BetaBased on the list of validated endogenous citrullinated peptides, the amino acid frequencies ranging from -6 to +6 residues around the citrullination site were analyzed and compared with the respective frequencies of all sequences in Uniprot as background. Motifs were filtered for statistical significance (p = 0.05; Bonferroni corrected).
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BetaBennike, Tue; Lauridsen, Kasper B. ; Olesen, Michael Kruse et al. / Optimizing the identification of citrullinated peptides by mass spectrometry : utilizing the inability of trypsin to cleave after citrullinated amino acids.
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The chemical conversion of arginine to citrulline, known as citrullination or deimination. Citrullination or deimination is the conversion of the amino acid arginine in a protein into the amino acid citrulline.Citrulline is not one of the 20 standard amino acids encoded by DNA in the genetic code.Instead, it is the result of a post-translational modification.
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