Carbohydrate Esterase family classification

Introduction

Carbohydrate esterases catalyze the de-O or de-N-acylation of substituted saccharides. Since an ester = acid + alcohol, we consider two classes of substrates for carbohydrate esterases: those in which the sugar plays the role of the "acid", such as pectin methyl esters and those in which the sugar behaves as the alcohol, such as in acetylated xylan. A number of possible reaction mechanisms may be involved: the most common is a Ser-His-Asp catalytic triad catalyzed deacetylation analogous to the action of classical lipase and serine proteases but other mechanisms such as a Zn2+ catalyzed deacetylation prevails in some families.

The CAZy database provides an updated list of the Carbohydrate Esterase families.

Tables for Direct Access

- CE Family Number

12345678910111213141516
Non-Classified Sequences

- CE Classification Statistics

Modules in present families 48628
Non-Classified modules 891

- EC Activities found in CE families

Caution : Because of the modular nature of CAZymes, these activities may not be directly associated with the family but simply borne by adjacent modules.

2.3.1.20 1
2.3.1.122 1
2.4.1.- 4
3.-.-.- 8 12
3.1.1.- 1 2 4 7 12 13 15 NC
3.1.1.3 5
3.1.1.6 1 3 4 16
3.1.1.11 8
3.1.1.41 7
3.1.1.72 1 2 3 4 5 6 7 12 15
3.1.1.73 1
3.1.1.74 5
3.2.1.- 6
3.2.1.4 2
3.2.1.8 1 3 4
3.2.1.40 15
3.5.1.- 4 9 11 14
3.5.1.25 9
3.5.1.41 4 NC
3.5.1.80 9
3.5.1.89 14
3.5.1.105 NC
4.2.2.- 8
4.2.2.2 8
Last update: 2017-10-09 © Copyright 1998-2017
AFMB - CNRS - Université d'Aix-Marseille