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Comparative aspects of glycosyltransferases
Christelle Breton1, Helena Heissigerová, Charlotte Jeanneau
1Centre de Recherches sur les Macromolécules Végétales, Centre National de la Recherche Scientifique, BP 53, 38041 Grenoble, France.
Biochemical Society Symposium
|March 27, 2003
Summary
Glycosyltransferases are key enzymes with diverse functions and biotechnological potential. Despite substrate similarities, sequence diversity is high, but only two structural folds are known, suggesting conserved functional motifs are crucial for classification.
Area of Science:
- Biochemistry
- Enzymology
- Structural Biology
Background:
- Glycosyltransferases (GTs) are crucial enzymes responsible for synthesizing oligosaccharides and glycoconjugates.
- GTs exhibit significant biological functions and hold considerable promise for biotechnological applications.
- Despite recognizing similar substrates, GTs display limited sequence identity across different enzyme classes.
Purpose of the Study:
- To explore methods for identifying remote similarities among glycosyltransferases.
- To investigate the classification and structural diversity of glycosyltransferases.
- To highlight the importance of conserved functional motifs in understanding GT evolution and function.
Main Methods:
- Sequence-based classification of known glycosyltransferases.
- Analysis of available crystal structures of glycosyltransferases.
- Identification and characterization of conserved functional motifs within GTs.
Main Results:
- Glycosyltransferases are classified into numerous families based on sequence data.
- Only two distinct structural folds have been identified among crystallized glycosyltransferases to date.
- Conserved motifs are key to understanding functional aspects and remote similarities in GTs.
Conclusions:
- Conserved functional motifs offer a promising approach for identifying distant relationships between glycosyltransferases.
- The fold-recognition approach, aided by increasing crystal structure availability, is valuable for GT classification.
- Further structural studies will enhance our understanding of glycosyltransferase diversity and function.