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Comparative analysis of membrane protein structure databases.

Kentaro Shimizu1, Wei Cao2, Gull Saad1

  • 1Department of Biotechnology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan.

Biochimica Et Biophysica Acta. Biomembranes
|January 15, 2018
PubMed
Summary

This study compares membrane protein databases, revealing differences in coverage and annotation criteria. Understanding these distinctions is crucial for effectively utilizing structural and functional data of membrane proteins.

Keywords:
AnnotationClassificationDatabaseMembrane proteinProtein domainProtein structureTransmembrane segment

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Area of Science:

  • Structural Biology
  • Bioinformatics
  • Biochemistry

Background:

  • Membrane proteins are vital for cell functions like transport and signaling.
  • They are crucial drug targets for various diseases.
  • Recent advancements have increased the number of known membrane protein structures.

Purpose of the Study:

  • To compare widely used membrane protein databases (mpstruc, OPM, PDBTM).
  • To analyze extended datasets including sequence similarity and SCOP classifications.
  • To evaluate database overlaps and consistency in structural, topological, and functional annotations.

Main Methods:

  • Comparative analysis of mpstruc, OPM, and PDBTM databases.
  • Inclusion of extended datasets based on sequence similarity and PDB/SCOP classifications.
  • Evaluation of content overlap and consistency in annotations.

Main Results:

  • Significant differences exist in database coverage, annotation, and classification criteria.
  • Inconsistencies were found in structural, topological, and functional assignments.
  • Transmembrane domain assignments also showed variability across databases.

Conclusions:

  • Understanding database differences is essential for efficient use of membrane protein structural data.
  • There is a need for more detailed and consistent annotations for membrane proteins.
  • This analysis provides a framework for future research and classification of membrane proteins.