Annotations: 1KKM

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1kkmb_	Alpha and beta proteins (a/b)	PEP carboxykinase-like	PEP carboxykinase-like	HPr kinase HprK C-terminal domain	HPr kinase HprK C-terminal domain	(Lacticaseibacillus casei ) [TaxId: 1582 ],	SCOPe (2.08)
C	d1kkmc_	Alpha and beta proteins (a/b)	PEP carboxykinase-like	PEP carboxykinase-like	HPr kinase HprK C-terminal domain	HPr kinase HprK C-terminal domain	(Lacticaseibacillus casei ) [TaxId: 1582 ],	SCOPe (2.08)
A	d1kkma_	Alpha and beta proteins (a/b)	PEP carboxykinase-like	PEP carboxykinase-like	HPr kinase HprK C-terminal domain	HPr kinase HprK C-terminal domain	(Lacticaseibacillus casei ) [TaxId: 1582 ],	SCOPe (2.08)
D [auth H]	d1kkmh_	Alpha and beta proteins (a+b)	HPr-like	HPr-like	HPr-like	Histidine-containing phosphocarrier protein (HPr)	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
E [auth I]	d1kkmi_	Alpha and beta proteins (a+b)	HPr-like	HPr-like	HPr-like	Histidine-containing phosphocarrier protein (HPr)	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
F [auth J]	d1kkmj_	Alpha and beta proteins (a+b)	HPr-like	HPr-like	HPr-like	Histidine-containing phosphocarrier protein (HPr)	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	PEPCK/HprK-like	8057754	3001670	SCOP2B (2021-05-27)
C	SCOP2B Superfamily	PEPCK/HprK-like	8057754	3001670	SCOP2B (2021-05-27)
A	SCOP2 Family	HprK C-terminal domain-like	8018058	4003457	SCOP2 (2021-05-27)
A	SCOP2 Superfamily	PEPCK/HprK-like	8057754	3001670	SCOP2 (2021-05-27)
D [auth H]	SCOP2B Superfamily	HPr-like	8035725	3000259	SCOP2B (2021-05-27)
E [auth I]	SCOP2B Superfamily	HPr-like	8035725	3000259	SCOP2B (2021-05-27)
F [auth J]	SCOP2B Superfamily	HPr-like	8035725	3000259	SCOP2B (2021-05-27)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	PF07475	e1kkmB1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: PEP carboxykinase catalytic C-terminal domain	F: PF07475	ECOD (1.6)
C	PF07475	e1kkmC1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: PEP carboxykinase catalytic C-terminal domain	F: PF07475	ECOD (1.6)
A	PF07475	e1kkmA1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: PEP carboxykinase catalytic C-terminal domain	F: PF07475	ECOD (1.6)
D [auth H]	PF00381	e1kkmH1	A: a+b two layers	X: HPr-like (From Topology)	H: HPr-like (From Topology)	T: HPr-like	F: PF00381	ECOD (1.6)
E [auth I]	PF00381	e1kkmI1	A: a+b two layers	X: HPr-like (From Topology)	H: HPr-like (From Topology)	T: HPr-like	F: PF00381	ECOD (1.6)
F [auth J]	PF00381	e1kkmJ1	A: a+b two layers	X: HPr-like (From Topology)	H: HPr-like (From Topology)	T: HPr-like	F: PF00381	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.2.0)
C	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.2.0)
A	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.2.0)
D [auth H]	3.30.1340.10	Alpha Beta	2-Layer Sandwich	Histidine-containing Protein	Chain: A	CATH (4.2.0)
E [auth I]	3.30.1340.10	Alpha Beta	2-Layer Sandwich	Histidine-containing Protein	Chain: A	CATH (4.2.0)
F [auth J]	3.30.1340.10	Alpha Beta	2-Layer Sandwich	Histidine-containing Protein	Chain: A	CATH (4.2.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
D [auth H], E [auth I], F [auth J]	PF00381	PTS HPr component phosphorylation site (PTS-HPr)	PTS HPr component phosphorylation site	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C	HprK protein	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding purine nucleotide binding organic cyclic compound binding anion binding cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding catalytic activity, acting on a protein small molecule sensor activity kinase activity protein kinase activity transferase activity phosphotransferase activity, nitrogenous group as acceptor phosphotransferase activity, alcohol group as acceptor protein histidine kinase activity transferase activity, transferring phosphorus-containing groups phosphorelay sensor kinase activity catalytic activity protein serine/threonine/tyrosine kinase activity protein serine/threonine kinase activity	carbohydrate metabolic process regulation of biological process biological regulation primary metabolic process metabolic process regulation of carbohydrate metabolic process regulation of metabolic process regulation of primary metabolic process	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol
D [auth H], E [auth I], F [auth J]	PHOSPHOCARRIER PROTEIN HPR	-	import into cell phosphoenolpyruvate-dependent sugar phosphotransferase system transport import across plasma membrane carbohydrate import across plasma membrane carbohydrate transport establishment of localization transmembrane transport localization cellular process carbohydrate transmembrane transport response to nutrient levels regulation of response to nutrient levels regulation of biological process import into cell phosphoenolpyruvate-dependent sugar phosphotransferase system transport import across plasma membrane carbohydrate import across plasma membrane carbohydrate transport establishment of localization transmembrane transport localization cellular process carbohydrate transmembrane transport response to nutrient levels regulation of response to nutrient levels regulation of biological process response to stimulus regulation of response to stimulus biological regulation regulation of carbohydrate utilization carbohydrate utilization	intracellular anatomical structure cytoplasm cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR003755	HPr(Ser) kinase/phosphorylase	Family
A, B, C	IPR011104	HPr kinase/phosphorylase, C-terminal	Domain
A, B, C	IPR028979	HPr(Ser) kinase/phosphorylase-like, N-terminal domain superfamily	Homologous Superfamily
A, B, C	IPR011126	HPr(Ser) kinase/phosphorylase, N-terminal	Domain
A, B, C	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
D [auth H], E [auth I], F [auth J]	IPR000032	Phosphocarrier protein HPr-like	Domain
D [auth H], E [auth I], F [auth J]	IPR002114	Phosphotransferase system, HPr serine phosphorylation site	PTM
D [auth H], E [auth I], F [auth J]	IPR035895	HPr-like superfamily	Homologous Superfamily
D [auth H], E [auth I], F [auth J]	IPR001020	Phosphotransferase system, HPr histidine phosphorylation site	PTM

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
D [auth H], E [auth I], F [auth J]	SEP	Parent Component: SER RESID: AA0037 PSI-MOD : O-phospho-L-serine MOD:00046

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 R01GM133198.