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Radar Chart Deviation Analysis of Prion Protein Amino Acid Composition Defines Characteristic Structural Abnormalities of the N-Terminal Octapeptide Tandem Repeat

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Analysis of the amino acid composition of prion protein using a newly developed program for radar-chart deviation analysis has identified an abnormality or irregularity of the N-terminal flexible domain. Aromatic amino acids Trp and His together with Gly are abnormally abounding in this Nterminal domain, in which octapeptide GQPHGGGW is connected four times in tandem. This tetrarepeat structure has been suggested to be essential for the prion protein not only to play an intrinsic functional role in the physiological condition, but also to bring on structural abnormalities in prion disease.

Keywords: Prion protein; amino acid composition; octapeptide repeat structure; prion disease; radar-chart deviation analysis

Document Type: Research Article


Publication date: September 1, 2008

More about this publication?
  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.

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