3.A.2.1.12 F-type ATPase lacking a δ-subunit, but having another subunit, AtpR of 104 aas and 3 TMSs that may replace the δ-subunit. 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). The AtpQ protein may be a Mg2+ channel.
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Accession Number: | Q467F5 |
Protein Name: | ATP synthase F0 subcomplex B subunit |
Length: | 413 |
Molecular Weight: | 47564.00 |
Species: | Methanosarcina barkeri (strain Fusaro / DSM 804) [269797] |
Number of TMSs: | 1 |
Substrate |
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1: MLIDWFTVIA QVINFLILVW LLKRFLYKPI LNAVDAREKR VADELKNADE KEAEAQKEKE
61: KFKRKNEEFD QQRNDFLNKA KEEVQAERQR LFEDVREEAS YLRAKQQEAL RNEGQNLSQE
121: IGRRTQQEVF FIARKVLTDL TETSLEERAV DVFVQRLRNL KDNEKKQLAS ALSTSPGQVL
181: IRTAFDLPQA QRDSIKKTIK ETLGIEIQPR FETAPDLVSG IELTTDGQKV AWSIADYLTS
241: MQKSIDELLN EQPENKAKTE PQTKNNKAKT EPQTKNNKAK TGPQTKNNKP KLEKEPEAEQ
301: ELEAETNKPR SKTESEVETR PETDYNKLRS KTESEAEQES EARQESEARR EPDAKQESEA
361: KQDSDAKQES EAEQKTDAKQ GSEAKQESEF KHQSGTKSES VVKQEINPKP EPT