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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:Q467F3
Protein Name:ATP synthase F0 subcomplex A subunit
Length:229
Molecular Weight:25207.00
Species:Methanosarcina barkeri (strain Fusaro / DSM 804) [269797]
Number of TMSs:5
Substrate

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MRLSPDELIF WQYDFIKLNA TIVYTWGLML VMVIGSKTIT SKLSTGLERS RWQNILEIIV 
61:	TGILEQIEDV GLDQPRKYLG FLGTLFLLIA VANLCIIIPG YEPPTGSLST TAALALCVFV 
121:	AVPLFGIEEQ GVSNYLKTYT EPTIIMLPFN IISEISRTLA LAIRLFGNIM SGSMIVAILL 
181:	TITPFIFPDL MIVLGLLVGM VQAYIFSVLA TVYIAAATRT SKSRSETGQ