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Related Experiment Videos

OB-fold: growing bigger with functional consistency.

Vishal Agrawal1, K V Radha Kishan

  • 1Institute of Microbial Technology, Sector 39-A, Chandigarh 160 036, India.

Current Protein & Peptide Science
|May 29, 2003
PubMed
Summary
This summary is machine-generated.

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The OB-fold protein structure, despite low sequence similarity, retains its binding function for various ligands. This suggests conserved functional features across diverse OB-folded proteins.

Area of Science:

  • Structural biology
  • Protein science
  • Bioinformatics

Background:

  • Limited protein folds predicted, with ~648 identified.
  • General functional features of protein folds remain understudied.
  • The OB-fold is hypothesized to bind oligonucleotides and oligosaccharides.

Purpose of the Study:

  • To investigate the general functional features of the OB-fold.
  • To analyze how OB-fold structure accommodates diverse ligands.
  • To determine if functional features are conserved across different OB-folded proteins.

Main Methods:

  • Analysis of various OB-folded protein classes.
  • Structural examination of the OB-fold beta-barrel and its loops.
  • Comparison of loop length and sequence variations for ligand binding.

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Main Results:

  • OB-fold is a small beta-barrel with 5 strands and 2-3 clamp-like loops.
  • Loops exhibit variable length and sequence to bind DNA/RNA and oligosaccharides.
  • Functional features are conserved despite negligible sequence homology.

Conclusions:

  • The OB-fold's structure facilitates versatile ligand binding.
  • Conserved functional properties exist within the OB-fold family.
  • This fold represents a conserved structural motif with adaptable binding capabilities.