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Sequence and structural determinants of mannose recognition.

G Ramachandraiah1, N R Chandra

  • 1Molecular Biophysics Unit, Bangalore, India.

Proteins
|May 17, 2000
PubMed
Summary
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Researchers identified a key sequence motif (QXDXNXVXY) essential for mannose binding in bulb lectins. This motif and surrounding residues are crucial for mannose recognition across diverse proteins.

Area of Science:

  • Carbohydrate-binding proteins
  • Structural biology
  • Molecular recognition

Background:

  • Mannose is a key monosaccharide on cell surfaces involved in numerous cellular processes.
  • Understanding mannose-protein interactions is vital for deciphering cellular functions.

Purpose of the Study:

  • To identify common principles of mannose recognition in proteins.
  • To analyze the structural basis of mannose binding in bulb lectins and related proteins.

Main Methods:

  • Structural analysis of mannose-binding proteins from the Protein Data Bank.
  • Identification and analysis of consensus sequence motifs.
  • Database analysis of protein structures and sequences.

Main Results:

Related Experiment Videos

  • A conserved QXDXNXVXY motif was identified as essential for mannose binding in bulb lectins.
  • Individual residues within the motif contribute significantly to mannose recognition.
  • Common hydrogen bonding patterns exist in diverse mannose-binding proteins despite sequence and structural variations.

Conclusions:

  • The QXDXNXVXY motif is a critical determinant of mannose specificity.
  • While backbone topology can confer binding capability, specific sequence and residue arrangement are crucial for retaining mannose-binding properties.