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Recent structural studies of carbohydrate-binding modules.

H Hashimoto1

  • 1International Graduate School of Arts and Sciences, Yokohama City University, 1-7-29 Suehiro, Tsurumi, Yokohama, Kanagawa, 230-0045, Japan. hash@tsurumi.yokohama-cu.ac.jp

Cellular and Molecular Life Sciences : CMLS
|November 30, 2006
PubMed
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Carbohydrate-binding modules (CBMs) enhance enzyme efficiency by binding polysaccharides. Recent structural studies reveal new CBM families and detailed classifications, particularly for beta-sandwich structures.

Area of Science:

  • Biochemistry
  • Structural Biology
  • Enzymology

Background:

  • Carbohydrate-binding modules (CBMs) are crucial protein domains found in carbohydrate-active enzymes.
  • CBMs specifically bind polysaccharides, boosting enzyme activity on various substrates.
  • They serve as excellent models for studying protein-carbohydrate interactions due to high specificity and affinity.

Purpose of the Study:

  • To review recent structural and functional studies of CBMs.
  • To discuss the detailed classification of CBM structures.
  • To explore the sub-classification of beta-sandwich CBMs.

Main Methods:

  • Analysis of published structural and functional data on CBMs.
  • Classification of CBMs into families based on sequence and structure.

Related Experiment Videos

  • Determination and comparison of three-dimensional structures of CBMs.

    • Main Results:

    • CBMs are classified into 45 families, with 31 families having determined 3D structures.
    • The beta-sandwich fold is the most common structural motif among CBMs.
    • Approximately 10 new CBM structures from different families have been reported recently, aiding detailed classification.

    Conclusions:

    • Recent structural data facilitates a more refined classification of CBMs.
    • The beta-sandwich fold is a prevalent and conserved structural element in CBMs.
    • Continued structural and functional studies are essential for understanding CBM diversity and mechanisms.