Annotations: 1C02

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1c02a_	All alpha proteins	Four-helical up-and-down bundle	Histidine-containing phosphotransfer domain, HPT domain	Phosphorelay protein-like	Phosphorelay protein ypd1	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)
B	d1c02b_	All alpha proteins	Four-helical up-and-down bundle	Histidine-containing phosphotransfer domain, HPT domain	Phosphorelay protein-like	Phosphorelay protein ypd1	baker's yeast (Saccharomyces cerevisiae ) [TaxId: 4932 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Histidine-containing phosphotransfer domain HPT domain	8036546	3001634	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Histidine-containing phosphotransfer domain HPT domain	8036546	3001634	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	PF01627	e1c02A1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Histidine-containing phosphotransfer domain, HPT domain (From Topology)	T: Histidine-containing phosphotransfer domain, HPT domain	F: PF01627	ECOD (1.6)
B	PF01627	e1c02B1	A: alpha bundles	X: Four-helical up-and-down bundle	H: Histidine-containing phosphotransfer domain, HPT domain (From Topology)	T: Histidine-containing phosphotransfer domain, HPT domain	F: PF01627	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.120.160	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	HPT domain	CATH (4.3.0)
B	1.20.120.160	Mainly Alpha	Up-down Bundle	Four Helix Bundle (Hemerythrin (Met), subunit A)	HPT domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF01627	Hpt domain (Hpt)	Hpt domain	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	PHOSPHOTRANSFERASE YPD1P	transferase activity catalytic activity transferase activity, transferring phosphorus-containing groups protein histidine kinase binding protein binding binding kinase binding enzyme binding protein kinase binding molecular transducer activity catalytic activity, acting on a protein kinase activity histidine phosphotransfer kinase activity protein kinase activity transferase activity catalytic activity transferase activity, transferring phosphorus-containing groups protein histidine kinase binding protein binding binding kinase binding enzyme binding protein kinase binding molecular transducer activity catalytic activity, acting on a protein kinase activity histidine phosphotransfer kinase activity protein kinase activity phosphotransferase activity, alcohol group as acceptor	phosphorylation cellular metabolic process phosphate-containing compound metabolic process metabolic process cellular process phosphorus metabolic process cellular response to stimulus regulation of cellular process osmosensory signaling via phosphorelay pathway response to stimulus signaling cellular response to chemical stress intracellular signal transduction cellular response to environmental stimulus phosphorylation cellular metabolic process phosphate-containing compound metabolic process metabolic process cellular process phosphorus metabolic process cellular response to stimulus regulation of cellular process osmosensory signaling via phosphorelay pathway response to stimulus signaling cellular response to chemical stress intracellular signal transduction cellular response to environmental stimulus cell communication osmosensory signaling pathway cellular response to stress response to stress signal transduction response to osmotic stress regulation of biological process phosphorelay signal transduction system biological regulation cellular response to osmotic stress cellular response to chemical stimulus response to chemical response to abiotic stimulus cellular response to abiotic stimulus	intracellular anatomical structure cytoplasm cellular anatomical entity membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR045871	Histidine-containing phosphotransfer protein 1-5/Phosphorelay intermediate protein YPD1	Family
A, B	IPR036641	HPT domain superfamily	Homologous Superfamily
A, B	IPR008207	Signal transduction histidine kinase, phosphotransfer (Hpt) domain	Domain

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.