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I know that Na+/k+ pump possess atp-ase function; so the pump will hydrolyze ATP into ADP + Pi. And I see in a figure that the pump is phosphorylated but couldn't really find which protein catalyzes this.

Does the pump act as a phosphorylase??

Or is there a separate enzyme present nearby that does this?

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  • $\begingroup$ What figure? Go figure why a pump needs ATP, or read the associated text. Come back and post when you’ve researched your question better. $\endgroup$ – David Apr 17 at 18:04
  • $\begingroup$ Also: Please add a link where you read this. $\endgroup$ – Chris Apr 17 at 18:19
  • $\begingroup$ IMO it will turn out to be a protein kinase of some description, and this catalytic event is totally unrelated to the ATPase activity or other catalytic activity of the pump. AFAIK, the pump is not auto-phosphorylated, but is regulated by phosphorylation/dephosphorylation of the catalytic subunit (by a separate protein kinase, ie by a separate enzyme) $\endgroup$ – user1136 Apr 17 at 21:33

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