Table II. The protein complex proteome of Arabidopsis mitochondria.
| Protein Complex | Apparent Molecular Massa | Composition | No. of Different Subunits Included in the Mapb (+No. of Additional Subunits Not Found in This Study) | Additional Isoformsc | |
| kD | |||||
| I+III2 supercomplex | 1,500 | Heterooligomer | All subunits of complex I and III | – | |
| Complex I | 1,000 | Heterooligomer | 44 + 3d | (+4) | 8 |
| Prohibitin | 1,000 | Homooligomer | 1 | 6 | |
| HSP60 complex | 783 | Homo-14-mer | 1 | 5 | |
| Membrane arm, complex I | 660 | Heterooligomer | Approximately 35 subunits of complex I | – | |
| Complex V | 660 | heterooligomer | 14 | (+1) | 2 |
| Complex III | 500 | Heterooligomer | 10 | 6 | |
| PPR2 complex | 369 | Homooligomer (?) | 1 + X | 1 | |
| NAD malic enzyme | 369 | Heterohexamer | 2 | 0 | |
| F1 part of complex V | 300 | Heterooligomer | Five subunits of complex V | – | |
| TOM complex | 260 | Heterooligomer | 4 | (+2) | 6 |
| F0 part of complex V | 260 | Heterooligomer | Seven subunits of complex V | – | |
| Clp protease complex | 260 | Homo-14-mer | 1 | 0 | |
| Oxoglutarate DH-E1 | 210 | Homodimer | 1 | 1 | |
| PPR3 complex | 209 | Homooligomer (?) | 1 + X | 0 | |
| Lon protease | 209 | Homodimer | 1 | 3 | |
| Glu dehydrogenase | 209 | Homohexamer | 1 | 2 | |
| Complex IV | 207 | Heterooligomer | 6 | (+8) | 8 |
| Fumarase | 200 | Homotetramer | 1 | 1 | |
| Complex II | 160 | Heterooligomer | 7 | (+1) | 5 |
| PPR1 complex | 160 | Homooligomer (?) | 1 + X | 0 | |
| Isocitrate DH | 160 | Homotetramer | 1 | 3 | |
| Malate DH | 160 | Homotetramer | 1 | 2 | |
| Alternative ND (NDA + NDB) | 160 | Heterotrimer | 2 | 4 | |
| PPR5 complex | 156 | Homooligomer (?) | 1 + X | 1 | |
| Metaxin/SAM complex (?) | 150 | Heterooligomer | 1 | 0 | |
| Arginase | 150 | Homotrimer | 1 | 1 | |
| Pyruvate DH-E1 | 138 | Heterotetramer | 2 | 1 | |
| Isovaleryl-CoA dehydrogenase | 132 | Homotetramer (?) | 1 | 0 | |
| TIM23 complex | 115 | Heterooligomer | 2 | (+4) | 2 |
| Citrate synthase | 110 | Homodimer | 1 | 1 | |
| HSP10 complex | 108 | Homoheptamer | 1 | 1 | |
| Voltage-dependent anion channel complexes | 90/180 | Homotri/hexamers | 1 | 4 | |
| ADP/ATP translocase | 60/120 | Homodi/tetramers | 1 | 2 | |
| TIM9-10 complex | 86 | Heterohexamer | 2 | 0 | |
| Σe (35 complexes) | 86–1,500 | 118 | (+20) | 76 | |
a
Apparent molecular mass as determined in this study.
b
Without isoforms.
c
Based on the genome sequence. Note that not all isoforms were detected in the frame of this project.
d
Three new complex I subunits were discovered in the frame of this project.
e
Subunits detected in a holocomplex and in subcomplexes only were counted once.