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3.A.2.1.12
F-type ATPase lacking a δ-subunit, but having another subunit, AtpR of 104 aas and 2 TMSs.  Has a c-subunit that shows the expected residues that comprise a Na+ binding site, so it may be a Na+ exporting ATPase.  It is in a family of similar ATPases that all lack δ-subunits and have been called N-ATPases (Na+-transporting) (Dibrova et al. 2010). They appear to be subject to horizontal transfer and represent a second type of F-type ATPase, the other transporting protons. They are found in a variety of bacteria and archaea (Dibrova et al. 2010).

Accession Number:Q467F6
Protein Name:H(+)-transporting ATP synthase, subunit alpha
Length:571
Molecular Weight:62933.00
Species:Methanosarcina barkeri (strain Fusaro / DSM 804) [269797]
Number of TMSs:2
Substrate

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	METKGLKDVF DKVFTEIHQA RESVTPTLTP KEVGRILTVS TGIANVSGLP TVGFDELIKF 
61:	PGDLFGIAFN VDEKEIGTVL LGEYSHLHAG DQVERTQRVM DVAVGEELLG RVIDPLGRPL 
121:	DNKGPIVSSK RLPIERPSPA IMDRAPVTVP LQTGVKVIDA LIPIGRGQRE LILGDRQTGK 
181:	TAIAIDTILN QRNFNVLCVY CAIGQRASAV ARAVANLRER GAMDYTIVVV TEGNDPSGLI 
241:	YIAPYAATSI AEYFMEAGRD VLIVYDDLTN HARAYRELSL LLRRPPGREA YPGDIFYIHS 
301:	RLLERSTHLL KELGGGSLTA LPIIETEAQN ISAYIPTNLI SITDGQIYLS PSLFELGVLP 
361:	AVDVGKSVSR VGGKAQLAAY RAVAGDIKLA YSQFEELEAF TRFGARLDEN TRKLIEHGRR 
421:	IRALLKQPQN SPVPVPDQIV ILVALNAKLF DNVPLDKMGE AESSLRKAVP DIPADVRDRF 
481:	KGDKELSDKD RETILDIARK SLKPYQPNPE SESKPEAKTE ERSESETQNE ERSESETQNE 
541:	EITESETQTE EKTESETQNK GKSEPEAEEK S