Annotations: 5MAQ

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	P-loop nucleotide/nucleoside kinase-like	8090028	3002021	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	P-loop nucleotide/nucleoside kinase-like	8090028	3002021	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	P-loop nucleotide/nucleoside kinase-like	8090028	3002021	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	P-loop nucleotide/nucleoside kinase-like	8090028	3002021	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	PPK2	e5maqA1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: PPK2	ECOD (1.6)
B	PPK2	e5maqB1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: PPK2	ECOD (1.6)
C	PPK2	e5maqC1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: PPK2	ECOD (1.6)
D	PPK2	e5maqD1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: PPK2	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)
B	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)
C	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)
D	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, 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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	Polyphosphate:AMP phosphotransferase	kinase activity transferase activity polyphosphate kinase activity catalytic activity phosphotransferase activity, phosphate group as acceptor transferase activity, transferring phosphorus-containing groups	oxoacid metabolic process metabolic process cellular process small molecule metabolic process organic acid metabolic process phosphorus metabolic process polyphosphate metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR022300	Polyphosphate:nucleotide phosphotransferase, PPK2	Family
A, B, C, D	IPR022488	Polyphosphate kinase-2-related	Domain
A, B, C, D	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A, B, C, D	IPR016898	Polyphosphate phosphotransferase	Family

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.