Annotations: 1XHK

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1xhka_	Alpha and beta proteins (a+b)	Ribosomal protein S5 domain 2-like	Ribosomal protein S5 domain 2-like	ATP-dependent protease Lon (La), catalytic domain	ATP-dependent protease Lon (La), catalytic domain	(Methanocaldococcus jannaschii ) [TaxId: 2190 ],	SCOPe (2.08)
B	d1xhkb1	Alpha and beta proteins (a+b)	Ribosomal protein S5 domain 2-like	Ribosomal protein S5 domain 2-like	ATP-dependent protease Lon (La), catalytic domain	ATP-dependent protease Lon (La), catalytic domain	(Methanocaldococcus jannaschii ) [TaxId: 2190 ],	SCOPe (2.08)
B	d1xhkb2	Artifacts	Tags	Tags	Tags	N-terminal Tags	(Methanocaldococcus jannaschii ) [TaxId: 2190 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	ATP-dependent protease Lon (La) catalytic domain	8031525	4001274	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Ribosomal protein S5 domain 2-like	8043903	3000100	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Ribosomal protein S5 domain 2-like	8043903	3000100	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	Lon_C_N	e1xhkA2	A: a+b two layers	X: Ribosomal protein S5 domain 2-like (From Topology)	H: Ribosomal protein S5 domain 2-like (From Topology)	T: Ribosomal protein S5 domain 2-like	F: Lon_C_N	ECOD (1.6)
A	Lon_C_C	e1xhkA3	A: a/b three-layered sandwiches	X: C-terminal subdomain in Lon-related proteases catalytic domains (From Topology)	H: C-terminal subdomain in Lon-related proteases catalytic domains (From Topology)	T: C-terminal subdomain in Lon-related proteases catalytic domains	F: Lon_C_C	ECOD (1.6)
B	Lon_C_N	e1xhkB1	A: a+b two layers	X: Ribosomal protein S5 domain 2-like (From Topology)	H: Ribosomal protein S5 domain 2-like (From Topology)	T: Ribosomal protein S5 domain 2-like	F: Lon_C_N	ECOD (1.6)
B	Lon_C_C	e1xhkB2	A: a/b three-layered sandwiches	X: C-terminal subdomain in Lon-related proteases catalytic domains (From Topology)	H: C-terminal subdomain in Lon-related proteases catalytic domains (From Topology)	T: C-terminal subdomain in Lon-related proteases catalytic domains	F: Lon_C_C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.230.10	Alpha Beta	2-Layer Sandwich	Ribosomal Protein S5	domain 2	CATH (4.3.0)
B	3.30.230.10	Alpha Beta	2-Layer Sandwich	Ribosomal Protein S5	domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF05362	Lon protease (S16) C-terminal proteolytic domain (Lon_C)	Lon protease (S16) C-terminal proteolytic domain	The Lon serine proteases must hydrolyse ATP to degrade protein substrates. In Escherichia coli, these proteases are involved in turnover of intracellular proteins, including abnormal proteins following heat-shock. The active site for protease activit ...	The Lon serine proteases must hydrolyse ATP to degrade protein substrates. In Escherichia coli, these proteases are involved in turnover of intracellular proteins, including abnormal proteins following heat-shock. The active site for protease activity resides in a C-terminal domain. The Lon proteases are classified as family S16 in Merops.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Putative protease La homolog	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding pyrophosphatase activity ATP hydrolysis activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides catalytic activity ATP-dependent activity peptidase activity catalytic activity, acting on a protein serine hydrolase activity serine-type peptidase activity serine-type endopeptidase activity endopeptidase activity ATP-dependent peptidase activity	regulation of cellular process cellular biosynthetic process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process organic substance metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of cellular process cellular biosynthetic process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process organic substance metabolic process organic substance biosynthetic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological process cellular metabolic process biological regulation primary metabolic process regulation of cellular metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of cellular biosynthetic process organic cyclic compound metabolic process regulation of gene expression biosynthetic process organic cyclic compound biosynthetic process metabolic process regulation of macromolecule biosynthetic process cellular process regulation of DNA-templated transcription macromolecule metabolic process regulation of metabolic process organonitrogen compound catabolic process organonitrogen compound metabolic process catabolic process protein catabolic process macromolecule catabolic process protein metabolic process organic substance catabolic process proteolysis	cell periphery plasma membrane membrane cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR002078	RNA polymerase sigma factor 54 interaction domain	Domain
A, B	IPR000523	Magnesium chelatase ChlI-like, catalytic domain	Domain
A, B	IPR004663	Lon protease, archaeal	Family
A, B	IPR003593	AAA+ ATPase domain	Domain
A, B	IPR008269	Peptidase S16, Lon proteolytic domain	Domain
A, B	IPR027065	Lon protease	Family
A, B	IPR020568	Ribosomal protein uS5 domain 2-type superfamily	Homologous Superfamily
A, B	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A, B	IPR014721	Small ribosomal subunit protein uS5 domain 2-type fold, subgroup	Homologous Superfamily

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.