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3.A.2.1.11
F-type ATP synthase of 8 subunits common to other ATPases, and 9 subunits unique to the Chlorophyta.  Near neighbor interactions of the membrane subunits have been measured (Sánchez-Vásquez et al. 2017).  The spinich enzyme has been solved at 3.4 Å resolution by cryoEM (Hahn et al. 2018).  The protein has 26 protein subunits, 17 of them membrane embedded.  Its c-ring has 14 c subunits. Hahn et al. 2018 observed 3 chloroplast F1F0 conformations with the central rotor stalled in different positions, and ring rotation seemed to be divided into 3 unequal stteps. The stoichiometrically mismatched c-ring of F0s (composed of 8 to 17 c-subunits) and the 3-fold symmetric F1 head are flexibly coupled (Murphy et al. 2019).  Based on cryo EM 2.7 Å resolution structures, 13 rotary states suggest a mechanism of the rotational movement, and the functions of novel subunits are proposed (Murphy et al. 2019). 

Accession Number:D8V7I2
Protein Name:Mitochondrial ATP synthase associated protein ASA7
Length:190
Molecular Weight:20529.00
Species:Polytomella sp. Pringsheim 198.80 [37502]
Substrate

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FASTA formatted sequence
1:	MSSVRAGVEA GRRDLTTFTF SGLQDAPVAA LSGSIKLNVA AKAGKAEVTV AAGAAKAATQ 
61:	VSAAALRKLS GSKISLAEVA RISVLHSSIQ NYLLSLSNER YQLLSQWPDF TTMYGKDFYY 
121:	RAHPEDLKKF YDAADEYYKL YETVTEFDSL SALASQVVPN YAARRRSTVH PAIGSTVADG 
181:	AFTNFLLSKQ