Table 5.
Ar/R selectivity filters of Populus PIP, TIP, NIP and SIP members
| MIP Membersa | H2 | H5 | LE1 | LE2 |
|---|---|---|---|---|
| PIP family | ||||
| PtPIP1;1 to PtPIP1;5 PtPIP2;1 to PtPIP2;9 |
F | H | T | R |
| PtPIP2;10 | N | H | T | R |
| TIP family | ||||
| PtTIP1;1 to PtTIP1;8 | H | I | A | V |
| PtTIP2;1 to PtTIP2;4 | H | I | G | R |
| PtTIP3;1, PtTIP3;2, PtTIP4;1 | H | I | A | R |
| PtTIP5;1, PtTIP5;2 | N | V | G | C |
| NIP family | ||||
| PtNIP1;1 to PtNIP1;4 | W | V | A | R |
| PtNIP1;5 | W | A | A | R |
| PtNIP2;1 | G | S | G | R |
| PtNIP3;1 to PtNIP3;5 | S/T/A | I/V | G/A | R |
| SIP family | ||||
| PtSIP1;1 | I | V | P | F |
| PtSIP1;2, PtSIP1;3, PtSIP1;4 | V/A | V | P | N |
| PtSIP2;1, PtSIP2;2 | T/S | H | G | S |
aPtMIP members and the corresponding selectivity filter residues are shown in italics if the ar/R selectivity filter is not found in Arabidopsis, rice or maize.