9H8J

Chains	Accession	Name	Description	Comments	Source
A [auth B], B [auth A], C, D	PF03976	Polyphosphate kinase 2 (PPK2) (PPK2)	Polyphosphate kinase 2 (PPK2)	Inorganic polyphosphate (polyP) plays a role in metabolism and regulation and has been proposed to serve as a energy source in a pre-ATP world. In prokaryotes, the synthesis and utilisation of polyP are catalysed by PPK1, PPK2 and polyphosphatases. ...	Inorganic polyphosphate (polyP) plays a role in metabolism and regulation and has been proposed to serve as a energy source in a pre-ATP world. In prokaryotes, the synthesis and utilisation of polyP are catalysed by PPK1, PPK2 and polyphosphatases. Proteins with a single PPK2 domain catalyse polyP-dependent phosphorylation of ADP to ATP, whereas proteins containing 2 fused PPK2 domains phosphorylate AMP to ADP. The structure of PPK2 from Pseudomonas aeruginosa has revealed a a 3-layer alpha/beta/alpha sandwich fold with an alpha-helical lid similar to the structures of microbial thymidylate kinases [3].	Domain

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B], B [auth A], C, D	Polyphosphate kinase	kinase activity transferase activity polyphosphate kinase activity catalytic activity phosphotransferase activity, phosphate group as acceptor transferase activity, transferring phosphorus-containing groups	-	-

Chains	Accession	Name	Type
A [auth B], B [auth A], C, D	IPR022488	Polyphosphate kinase-2-related	Domain
A [auth B], B [auth A], C, D	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A [auth B], B [auth A], C, D	IPR016898	Polyphosphate phosphotransferase	Family