Pairwise sequence similarity mapping with PaSiMap : Reclassification of immunoglobulin domains from titin as case study

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2022
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Computational and Structural Biotechnology Journal. Elsevier. 2022, 20, pp. 5409-5419. eISSN 2001-0370. Available under: doi: 10.1016/j.csbj.2022.09.034
Zusammenfassung

Sequence comparison is critical for the functional assignment of newly identified protein genes. As uncharacterized protein sequences accumulate, there is an increasing need for sensitive tools for their classification. Here, we present a novel multidimensional scaling pipeline, PaSiMap, which creates a map of pairwise sequence similarities. Uniquely, PaSiMap distinguishes between unique and shared features, allowing for a distinct view of protein-sequence relationships. We demonstrate PaSiMap's efficiency in detecting sequence groups and outliers using titin's 169 immunoglobulin (Ig) domains. We show that Ig domain similarity is hierarchical, being firstly determined by chain location, then by the loop features of the Ig fold and, finally, by super-repeat position. The existence of a previously unidentified domain repeat in the distal, constitutive I-band is revealed. Prototypic Igs, plus notable outliers, are identified and thereby domain classification improved. This re-classification can now guide future molecular research. In summary, we demonstrate that PaSiMap is a sensitive tool for the classification of protein sequences, which adds a new perspective in the understanding of inter-protein relationships. PaSiMap is applicable to any biological system defined by a linear sequence, including polynucleotide chains.

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570 Biowissenschaften, Biologie
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Titin, Multidimensional scaling, Sequence analysis
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ISO 690SU, Kathy, Olga MAYANS, Kay DIEDERICHS, Jennifer R. FLEMING, 2022. Pairwise sequence similarity mapping with PaSiMap : Reclassification of immunoglobulin domains from titin as case study. In: Computational and Structural Biotechnology Journal. Elsevier. 2022, 20, pp. 5409-5419. eISSN 2001-0370. Available under: doi: 10.1016/j.csbj.2022.09.034
BibTex
@article{Su2022Pairw-59111,
  year={2022},
  doi={10.1016/j.csbj.2022.09.034},
  title={Pairwise sequence similarity mapping with PaSiMap : Reclassification of immunoglobulin domains from titin as case study},
  volume={20},
  journal={Computational and Structural Biotechnology Journal},
  pages={5409--5419},
  author={Su, Kathy and Mayans, Olga and Diederichs, Kay and Fleming, Jennifer R.}
}
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