FIGURE 5.

Peripheral stalk of the Thermus thermophilus A-ATPase. (A) Three dimensional model of the archaeal enzyme (Schep et al., 2016) PDB 5GAR, in which the peripheral stalks, the collar-like structure made by subunit a and the c-ring are colored. (B) Model of the EG heterodimer in which the coiled coil domain and the globular domain are indicated. (C) Model of the EG heterodimer that illustrates the right handed coiling of the helices and the two types of coiling that result from the hendecad motifs in both subunits, and quindecad repeat motifs in subunit G. The model used in B,C corresponds to the structural data deposited with the PDB 3V6I (Stewart et al., 2012). The black horizontal lines indicate the mitochondrial inner membrane.