Table 1 Subunits of the Arabidopsis I + III2 supercomplex as shown in Fig. 2 and Supplementary Table 4

From: Cryo-EM structure of the respiratory I + III2 supercomplex from Arabidopsis thaliana at 2 Å resolution

Complex I, peripheral arm (including bridge domain), 17 subunits

Core subunits (7)

Conserved accessory subunits (9)

Other accessory subunit (1)

24 kDa

13 kDa

B17.2

C1-FDX

51 kDa

18 kDa

SDAP-2

 

75 kDa

39 kDa

  

TYKY-1

B8

  

PSST

B13

  

ND7

B14

  

ND9

B14.5a

 

Complex I, membrane arm (including carbonic anhydrase domain), 31 subunits

Core subunits (7)

Conserved accessory subunits (18)

Other accessory subunits (6)

ND1

15 kDa

B18

CA1/CA3

ND2

AGGG

B22

CA2

ND3

ASHI

ESSS-1

CAL2/CAL1

ND4

B9

KFYI

P1 (SGDH)

ND4L

B12-2

NUXM

P2

ND5

B14.5b

MWFE

P9

ND6

B14.7

PDSW-1

 
 

B15

PGIV-2

 
 

B16.6-2

SDAP-1

 

Complex III, 10 subunits (two copies each in the dimeric complex III)

Core subunits (3)

Conserved accessory subunits (5)

Other accessory subunits (2)

Cyt b

QCR6-1

QCR9

MPP-α-1

Cyt c1-1

QCR7-2

QCR10

MPP-β

Rieske-1

QCR8-1

  
  1. Core subunits are the minimal set necessary for complex I and complex III2 function and are conserved in prokaryotes and mitochondria. Accessory subunits are additional proteins forming part of the two complexes in mitochondria. They can be divided into conserved and non-conserved accessory subunits. Extensions −1/−2 indicate isoforms of Arabidopsis complex I and complex III2 subunits. The dominant isoform was fitted to the map and is shown in the structures. Subunit B14.5a was found in purified Arabidopsis I + III2 supercomplex by MS (Supplementary Table 4) but not identified in the map. For protein nomenclature and accession numbers, see Supplementary Tables 5 and 6
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