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Bottom-up and Shotgun Proteomics to Identify a Comprehensive Cochlear Proteome
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The human transmembrane proteome.

László Dobson1, István Reményi2, Gábor E Tusnády3

  • 1"Momentum" Membrane Protein Bioinformatics Research Group, Institute of Enzymology, RCNS, HAS, Budapest, PO Box 7, H-1518, Hungary. dobson.laszlo@ttk.mta.hu.

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Summary

We present the most accurate human transmembrane proteome prediction database, detailing protein topology and reliability. This resource aids pharmaceutical development and structural biology research.

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Bioinformatics

Background:

  • Transmembrane proteins are vital for cellular functions including energy production and signaling.
  • Understanding their structure and topology is crucial for pharmaceutical development.
  • Topology data offers low-resolution structural insights for experimental and modeling studies.

Purpose of the Study:

  • To create a comprehensive database of the human alpha-helical transmembrane proteome.
  • To predict and validate the topology of these proteins with high accuracy.
  • To provide a reliable resource for researchers studying transmembrane proteins.

Main Methods:

  • Developed and utilized a novel consensus method (CCTOP) for transmembrane protein identification and topology prediction.
  • CCTOP integrates state-of-the-art methods and utilizes a hidden Markov model framework.
  • Validated CCTOP accuracy on a new human benchmark protein set.

Main Results:

  • Identified 4998 transmembrane proteins (26%) in the human proteome.
  • Achieved 98.5% accuracy in distinguishing transmembrane from non-transmembrane proteins.
  • Demonstrated high per-protein topology prediction accuracy (>98% for over 60% of predictions).

Conclusions:

  • Presented the most accurate prediction of the human transmembrane proteome with experimental topology data.
  • The database and associated statistics are publicly accessible online.
  • This resource facilitates further research into human transmembrane proteins and their functions.