Table 1.
Representatives of pectin-related gene families in Arabidopsis and Physcomitrella
| Pectin-related gene family | Arabidopsis genes | Physcomitrella genes | Putative minimum # of family members in common ancestor |
|---|---|---|---|
| UDP-Rhamnose synthases |
4 |
6 |
1 |
| UDP-Glucuronic acid epimerases |
5 |
9 |
1 |
| Galacturonosyltransferases (GAUTs) |
15 |
8 |
3 |
| GAUT-like proteins (GATLs) |
10 |
3 |
1 |
| β-1,4-Galactan β-1,4-Galactosyltransferase |
3 |
4 |
1 |
| Rhamnogalacturonan II xylosyltransferases |
4 |
1 |
1 |
| Rhamnogalacturonan I arabinosyltransferases |
2 |
0 |
ND |
| Xylogalacturonan xylosyltransferases |
2 |
0 |
ND |
| Homogalacturonan methyl-transferases |
6 |
3 |
2 |
| Pectin methylesterases |
66 |
14 |
5 |
| Pectin methylesterase inhibitors (PMEIs) |
2 |
0 |
ND |
| Polygalacturonases |
67 |
10 |
5 |
| Polygalacturonase Inhibitor Proteins (PGIPs) |
2 |
0 |
ND |
| Pectate lyase-like proteins |
26 |
7 |
2 |
| Pectin acetylesterases |
11 |
1 |
1 |
| Pectin acetyltransferases |
4 |
3 |
1 |
| Totals | 229 | 69 | 24 |
Sixteen gene families were analyzed. For each gene family, the number under the species with the larger number of genes is highlighted in bold. In most cases there were more Arabidopsis members than Physcomitrella members. ND (not determined); phylogenetic ambiguity prevents an accurate estimation of ancestral gene number at this time.