Annotations: 4U94

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	TreS_Cterm	e4u94A1	A: a+b two layers	X: Cystatin-like	H: Maltokinase N-terminal domain (From Topology)	T: Maltokinase N-terminal domain	F: TreS_Cterm	ECOD (1.6)
A	Fructosamin_kin	e4u94A2	A: a+b complex topology	X: Protein kinase/SAICAR synthase/ATP-grasp (From Homology)	H: Protein kinase/SAICAR synthase/ATP-grasp	T: Protein kinase	F: Fructosamin_kin	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.90.1200.10	Alpha Beta	Alpha-Beta Complex	Aminoglycoside 3'-phosphotransferase	Chain: A, domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF18085	Maltokinase N-terminal cap domain (Mak_N_cap)	Maltokinase N-terminal cap domain	Glycogen is a central energy storage molecule in bacteria and the metabolic pathways associated with its biosynthesis and degradation are crucial for maintaining cellular energy homeostasis. In mycobacteria, the GlgE pathway involves the combined act ...	Glycogen is a central energy storage molecule in bacteria and the metabolic pathways associated with its biosynthesis and degradation are crucial for maintaining cellular energy homeostasis. In mycobacteria, the GlgE pathway involves the combined action of trehalose synthase (TreS), maltokinase (Mak) and maltosyltransferase (GlgE). The N-terminal lobe can be divided into two subdomains: a cap N-terminal subdomain comprising the first 88 amino acid residues. This entry is for the cap N-terminal domain found in mycobacterial maltokinase (Mak), (EC:2.7.1.175). The N-terminal cap subdomain and the C-terminal lobe are predominantly acidic, the intermediate subdomain is enriched in positively charged residues. A structural search with only the first 88 amino acid residues of Mak, corresponding to the N-terminal cap subdomain of maltokinases, unveiled a resemblance with proteins displaying the cystatin fold and a remote similarity with the N-terminal domain of the serine/threonine protein kinase GCN2. Conservation of the cap subdomain in maltokinases (including the bifunctional TreS-Mak enzymes), in particular of the residues in the proximity of the P-loop, together with the potential flexibility of this region, are compatible with regulatory functions for this subdomain. Hence it is hypothesised that the N-terminal cap subdomain plays a central role in modulation of Mak enzymatic activity [2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Maltokinase	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding kinase activity transferase activity catalytic activity transferase activity, transferring phosphorus-containing groups	carbohydrate metabolic process trehalose metabolic process carbohydrate biosynthetic process oligosaccharide metabolic process primary metabolic process disaccharide metabolic process disaccharide biosynthetic process biosynthetic process oligosaccharide biosynthetic process trehalose biosynthetic process metabolic process cellular process carbohydrate phosphorylation phosphorylation carbohydrate metabolic process trehalose metabolic process carbohydrate biosynthetic process oligosaccharide metabolic process primary metabolic process disaccharide metabolic process disaccharide biosynthetic process biosynthetic process oligosaccharide biosynthetic process trehalose biosynthetic process metabolic process cellular process carbohydrate phosphorylation phosphorylation phosphate-containing compound metabolic process phosphorus metabolic process glucan biosynthetic process polysaccharide biosynthetic process energy derivation by oxidation of organic compounds glycogen metabolic process generation of precursor metabolites and energy glycogen biosynthetic process macromolecule biosynthetic process polysaccharide metabolic process glucan metabolic process energy reserve metabolic process macromolecule metabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR040999	Maltokinase N-terminal cap domain	Domain
A	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily

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.