4.8 Article

b2bTools: online predictions for protein biophysical features and their conservation

Journal

NUCLEIC ACIDS RESEARCH
Volume 49, Issue W1, Pages W52-W59

Publisher

OXFORD UNIV PRESS
DOI: 10.1093/nar/gkab425

Keywords

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Funding

  1. European Union [813239]
  2. Research Foundation Flanders (FWO) [G.0328.16N]
  3. European Regional Development Fund (ERDF)
  4. Brussels-Capital Region-Innoviris
  5. Vrije Universiteit Brussel Research Council

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The tool provides integrated protein sequence-based predictions to identify biophysical behaviour not captured by structural biology. It offers various features including early folding and disorder predictions, with results available in JSON or CSV files and accessible via API. Online visualization tools are also provided for interactive plots and explanations.
We provide integrated protein sequence-based predictions via https://bio2byte.be/b2btools/. The aim of our predictions is to identify the biophysical behaviour or features of proteins that are not readily captured by structural biology and/or molecular dynamics approaches. Upload of a FASTA file or text input of a sequence provides integrated predictions from DynaMine backbone and side-chain dynamics, conformational propensities, and derived EFoldMine early folding, DisoMine disorder, and Agmata beta-sheet aggregation. These predictions, several of which were previously not available online, capture 'emergent' properties of proteins, i.e. the inherent biophysical propensities encoded in their sequence, rather than context-dependent behaviour (e.g. final folded state). In addition, upload of a multiple sequence alignment (MSA) in a variety of formats enables exploration of the biophysical variation observed in homologous proteins. The associated plots indicate the biophysical limits of functionally relevant protein behaviour, with unusual residues flagged by a Gaussian mixture model analysis. The prediction results are available as JSON or CSV files and directly accessible via an API. Online visualisation is available as interactive plots, with brief explanations and tutorial pages included. The server and API employ an email-free token-based system that can be used to anonymously access previously generated results.

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