3TK1

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	ArgK	e3tk1B1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: ArgK	ECOD (1.6)
A	ArgK	e3tk1A1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: ArgK	ECOD (1.6)

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	1.20.5.170	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		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)
B	1.10.287.130	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Signal transduction histidine kinase, dimerisation/phosphotransfer (DHp) domain	CATH (4.3.0)
A	1.20.5.170	Mainly Alpha	Up-down Bundle	Single alpha-helices involved in coiled-coils or other helix-helix interfaces		CATH (4.3.0)
A	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)
A	1.10.287.130	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Signal transduction histidine kinase, dimerisation/phosphotransfer (DHp) domain	CATH (4.3.0)

Chains	Accession	Name	Description	Comments	Source
A, B	PF03308	Methylmalonyl Co-A mutase-associated GTPase MeaB (MeaB)	Methylmalonyl Co-A mutase-associated GTPase MeaB	Family members were previously thought to be ArgK proteins acting as ATPase enzymes and kinases. They are now believed to be methylmalonyl Co-A mutase-associated GTPase MeaB. Structural studies of MeaB and the human ortholog (methylmalonyl associated ...	Family members were previously thought to be ArgK proteins acting as ATPase enzymes and kinases. They are now believed to be methylmalonyl Co-A mutase-associated GTPase MeaB. Structural studies of MeaB and the human ortholog (methylmalonyl associated protein A) MMAA, reveal alpha-helical domains at the N- and C-termini as well as a Ras-like GTPase domain. Mutational analysis of MeaB, show prohibited growth in Methylobacterium due to the inability to convert methylmalonyl-CoA to succinyl-CoA caused by an inactive form of methylmalonyl-CoA mutatase (mcm). In humans, mutations in (MMAA) are associated with the fatal disease methylmalonyl aciduria [1].	Domain

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Membrane ATPase/protein kinase	kinase activity transferase activity catalytic activity transferase activity, transferring phosphorus-containing groups binding guanyl nucleotide binding GTP binding nucleotide binding guanyl ribonucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding organic cyclic compound binding kinase activity transferase activity catalytic activity transferase activity, transferring phosphorus-containing groups binding guanyl nucleotide binding GTP binding nucleotide binding guanyl ribonucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding organic cyclic compound binding purine nucleotide binding anion binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding pyrophosphatase activity GTPase activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides	-	-