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3.A.2.1.5
The Na+-F1F0 ATP synthase.  Has a hybrid rotor with 9 copies of an F0-like c-subunit with 1 ion binding site/2TMSs and 1 copy of a V0-like C1-subunit (with 1 ion binding site/4TMSs). The  AtpI Mg2+ channel protein (TC# 1.A.77.10.4) is required for assembly of the hybrid rotor (Brandt et al. 2013).

Accession Number:P50000
Protein Name:ATP synthase subunit alpha, sodium ion specific
Length:502
Molecular Weight:55019.00
Species:Acetobacterium woodii (strain ATCC 29683 / DSM 1030 / JCM 2381 / KCTC 1655) [931626]
Location1 / Topology2 / Orientation3: Cell membrane1 / Peripheral membrane protein2
Substrate sodium(1+)

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Predict TMSs (Predict number of transmembrane segments)
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FASTA formatted sequence
1:	MNLRPEEISQ IIKNEIERYE DKLEVVDVGT VIQVGDGVAR VHGLENAMAG ELLAFPNEVY 
61:	GMVLNLEEDN VGCVLLGYDD DIVEGDIVRC TGRIVEVPVG EAMIGRVVNA LGFPVDGKGP 
121:	IVTDHRRPVE VKAAGVIERE SVNQPIQTGY KAIDSMIPIG RGQRELIIGD RQTGKTALAI 
181:	DTIINQKGED VICIYVAIGQ KDSTVAQIVG QLEENNAMDY TIIVSAGAAQ LAPLQYIAPY 
241:	SGVTMAEYFM NEQQKDVLII YDDLSKHAVA YRAMSLILRR PPGREAYPGD VFYLHSRLLE 
301:	RAAKLKAGGS ITALPIIETQ AGDVSAYIPT NVISITDGQI FLEAELFRSG IRPAVNPGIS 
361:	VSRVGGSAQI KSMKKVAGPL RIEYAQYREL ASFAQFGSDL DDETKAQLAK GERIVEILKQ 
421:	DQYDPMNVED QVLILYAATN GFLLDIEVKD IREFEKGLIK FAQKKYPEIM TKVKGKDGLS 
481:	DEVVAAFAEC IEAYKKVFSK SV