Secondary structure prediction for the spectrin 106-amino acid segment, and a proposed model for tertiary structure |
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Authors: | Y Xu M Prabhakaran M E Johnson L W Fung |
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Institution: | Department of Chemistry, Loyola University, Chicago, IL 60626. |
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Abstract: | A collective secondary structure prediction for the human erythrocyte spectrin 106-residue repeat segment is developed, based on the sequences of nine segments that have been reported in the literature, utilizing a consensus of several secondary structure prediction methods for locating turn regions. The analysis predicts a five-fold structure, with three alpha-helices and two beta-strand regions, and differs from previous models on the lengths of the helices and the existence of beta-strand structure. We also demonstrate that this structural motif can be folded into tertiary structures that satisfy the experimental spectrin data and several general principles of protein organization. |
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