an arginine residue (arg 210) in the a subunit of the e.coli atp synthase is near the aspartate residue (asp 61) in the matrix-side proton channel. how might arg 210 assist proton flow?

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16-12-2022
Biology

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an arginine residue (arg 210) in the a subunit of the e.coli atp synthase is near the aspartate residue (asp 61) in the matrix-side proton channel. how might arg 210 assist proton flow?

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fawadmohd fawadmohd · Answer 1 · 2022-12-20T11:03:53-05:00

The synthesis of ATP is accelerated by rotation of the subunit between three alternate catalytic sites in the F 1 sector of the enzyme.

The rotation of an oligomeric ring of c subunits that extends through the membrane is coupled with H+ transport during the rotational catalytic mechanism employed by F1F0 ATP synthases to create ATP. Protons bind to and then are released from the aspartyl-61 residue of subunit c at the centre of the membrane. According to speculation, subunit an of the F0 sector provides access points for protons to and from aspartyl-61. Here, we summarise current discoveries on the structural organisation of Escherichia coli subunit a and the aqueous accessibility of the second, fourth, and fifth transmembrane helices (TMHs). There are aqueous access points on these helices.

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