Table 4.
Inner envelope proteins with known function.
| AGI | Abbr. | Name and function | TM fold | Other Loc. | Studies | Cat | |
|---|---|---|---|---|---|---|---|
| Preprotein import | At1g06950 | Tic110 | Inner envelope translocon component | 1 α-Helical TM | – | 6 | I |
| At1g08640 | CJD1 | DnaJ-like membrane protein | 3 α-Helical TM | – | 5 | I | |
| At2g24820 | Tic55-II | Inner envelope Rieske iron-sulfur protein | 3 α-Helical TM | – | 5 | I | |
| At4g23420 | Tic32-IVb | NAD- or NADP-dependent oxidoreductase | 1 α-Helical TM | n.d. | 2 | I | |
| At4g25650 | Tic55-IV | Inner envelope Rieske iron-sulfur protein | 2 α-Helical TM | – | 4 | I | |
| At4g33350 | Tic22-IV | Inner envelope translocon component | None | – | 6 | I | |
| At5g16620 | Tic40 | Inner envelope translocon component | 1 α-Helical TM | – | 6 | I | |
| Lipid biosyn. | At4g15440 | HPL1 | Membrane-associated hydroperoxide lyase | 2 α-Helical TM | – | 4 | I |
| At4g31500 | SUR2 | Cytochrome P450 monooxygenase | 2 α-Helical TM | X | 1 | III | |
| At5g01220 | SQD2 | UDP-sulfoquinovose:DAG sulfoquinovosyltransferase | 1 α-Helical TM | – | 4 | I | |
| At5g05580 | FAD8 | chloroplast omega-3 fatty acid desaturase | 3 α-Helical TM | – | 3 | I | |
| Transport | At1g80300 | NTT1 | Plastidic ATP/ADP antiporter | 11 α-Helical TM | – | 5 | I |
| At3g20320 | TGD2 | Putative subfamily I ABC protein | 1 α-Helical TM | – | 6 | I | |
| At3g63410 | IEP37 | 37 kDa chloroplast inner envelope protein | 2 α-Helical TM | – | 6 | I | |
| At4g00630 | KEA2 | Putative potassium cation efflux antiporter | 14 α-Helical TM | – | 4 | I | |
| At4g25450 | NAP8 | Putative subfamily B ABC-type transporter | 5 α-Helical TM | – | 6 | I | |
| At5g12860 | DiT1 | Plastidic 2-oxoglutarate/malate-translocator | 13 α-Helical TM | – | 6 | I | |
| At5g14100 | NAP14 | Putative subfamily I ABC protein | None | – | 3 | I | |
| At5g17520 | MEX1 | Putative maltose translocator | 9 α-Helical TM | – | 3 | I | |
| At5g24650 | PRAT2.2 | Putative dual-targeted mitochondrial and plastidial membrane translocase | 4 α-Helical TM | – | 6 | I | |
| At5g64290 | DiT2.1 | Plastidic glutamate/malate-translocator | 11 α-Helical TM | – | 6 | I | |
| SR | At1g32080 | LRGB | LrgB-like membrane protein | 12 α-Helical TM | – | 5 | I |
| At3g47520 | MDH | NAD-malate dehydrogenase | 1 α-Helical TM | – | 4 | I | |
| At5g23040 | CDF1 | Cell growth defect factor | 3 α-Helical TM | – | 5 | I | |
| Proteases | At1g79560 | FtsH12 | ATP-dependent metalloprotease | 2 α-Helical TM | – | 4 | I |
| At5g53170 | FtsH11 | ATP-dependent metalloprotease | 1 α-Helical TM | X | 4 | I | |
| At5g64580 | FtsHi4 | Putative ATP-dependent metalloprotease | 1 α-Helical TM | – | 4 | I | |
| Embryon. develop. | At1g10510 | Emb2004 | Putative membrane protein | 1 α-Helical TM | – | 6 | I |
| At3g04340 | Emb2458 | Putative membrane protein | 3 α-Helical TM | – | 4 | I | |
| At3g52590 | UBQ1 | Ubiquitin extension protein | None | X | 1 | III | |
| At5g22640 | Emb1211 | Putative membrane protein | None | – | 4 | I | |
| At5g53860 | Emb2737 | Putative membrane protein | None | – | 3 | I | |
| Others | At1g65260 | VIPP1 | Membrane-associated vesicle-inducing prot. | None | – | 6 | I |
| At2g37860 | LCD1 | Mutant lcd1-1 exhibits pale phenotype | 2 α-Helical TM | – | 4 | I | |
Given is the functional pathway or the organellar compartment, the AGI number, the short name (Abbr.), the (putative) function, the transmembrane anchor architecture, other localization by the PPDB (Sun et al., 2009) and SUBAII (Heazlewood et al., 2007; n.d., not defined, –, no other localization, X, other localization), the number of studies where the protein was identified (our study; Ferro et al., 2003; Froehlich et al., 2003; Bräutigam et al., 2008; Bräutigam and Weber, 2009; Ferro et al., 2010), and the category from our study. Lipid biosynthesis (Lipid biosyn.); signaling and response (SR); embryonic development (Embryon. develop.).