Table 3.
Aromatic/arginine filter of PpMIPs and MIPs of the XIP subfamily
| NPA motifs | Ar/R selectivity filtera | ||||||
| MIP protein(s)b | Loop B | Loop E | H2 | H5 | LE1 | LE2 | Alt. H5c |
| PpPIPs | NPA | NPA | F | H | T | R | |
| PpTIPs | NPA | NPG | H | I | A | R | |
| PpNIP3.1 | NPA | NPV | A | I | A | R | |
| PpNIP5s | NPA | NPA | F | A | A | R | |
| PpNIP6.1 | NPA | NPM | G | V | A | R | |
| PpSIPs | NPT | NPA | V | V | P | N | |
| PpGIP1.1 | NPA | NPA | F | V | P | R | |
| PpHIP1.1 | NPA | NPA | H | H | A | R | |
| PpXIP1.1 | NPC | NPA | Q | A | A | R | A |
| PpXIP1.2 | NPS | NPA | Q | I | A | R | Q |
| DN837617 | NPI | NPA | L | Q | A | R | S |
| DY275505 | NPL | NPA | V | V | A | R | T |
| AM455454.1 | NPV | NPA | V | V | A | R | T |
| 557139 | NPI | NPA | V | V | A | R | T |
| 829126 | NPI | NPA | V | V | A | R | T |
| 759781 | NPI | NPA | V | V | A | R | T |
| EG666650 | SPT | NPA | V | V | V | R | T |
| DR936893 DT742029 | NPT | NPS | V | V | V | R | S |
| CK746370 D T60037 | NPI | NPA | V | I | V | R | G |
| 767334 | NPL | NPA | A | V | A | R | T |
| CK295158 | NPV | NPA | I | V | A | R | T |
| BT014197 | NPV | NPA | I | V | A | R | T |
| AM455454.2 | NPI | NPA | I | V | A | R | T |
| 821124 | NPA | NPA | I | V | V | R | T |
| EG656577 | NPV | NPA | I | V | V | R | T |
| CO092422 | NPV | NPA | I | V | V | R | T |
| XM_639170 | NPS | NPA | H | S | F | R | I |
a The ar/R filter is defined by four amino acid residues: one in helix 2, one in helix 5 and two in loop E b The PpMIPs are identified with their proposed names and the other MIPs are identified by their GenBank accession numbers c Alternative residue at H5 position due to alignment of conserved glycines in helix 5, however this also introduces two extra amino acids between helix 5 and the second NPA box