Annotations: 1IXM

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
B	d1ixmb_	Alpha and beta proteins (a+b)	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	(Bacillus subtilis ) [TaxId: 1423 ],	SCOPe (2.08)
A	d1ixma_	Alpha and beta proteins (a+b)	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	Sporulation response regulatory protein Spo0B	(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	Sporulation response regulatory protein Spo0B	8036215	3000617	SCOP2B (2022-06-29)
A	SCOP2 Family	Sporulation response regulatory protein Spo0B	8023835	4001965	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Sporulation response regulatory protein Spo0B	8036215	3000617	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	SPOB_ab	e1ixmB1	A: a+b two layers	X: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase-like	H: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase (From Topology)	T: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase	F: SPOB_ab	ECOD (1.6)
A	SPOB_ab	e1ixmA1	A: a+b two layers	X: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase-like	H: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase (From Topology)	T: ATPase domain of HSP90 chaperone/DNA topoisomerase II/histidine kinase	F: SPOB_ab	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	1.10.287.130	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Signal transduction histidine kinase, dimerisation/phosphotransfer (DHp) domain	CATH (4.3.0)
B	3.30.565.30	Alpha Beta	2-Layer Sandwich	Heat Shock Protein 90	Sporulation initiation phosphotransferase B (SpoOB), C-terminal domain	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)
A	3.30.565.30	Alpha Beta	2-Layer Sandwich	Heat Shock Protein 90	Sporulation initiation phosphotransferase B (SpoOB), C-terminal domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF14682	Sporulation initiation phospho-transferase B, C-terminal (SPOB_ab)	Sporulation initiation phospho-transferase B, C-terminal	Sporulation initiation phospho-transferase B or SpoOB is part of a phospho-relay that initiates sporulation in Bacillus subtilis. Spo0B is a two-domain protein consisting of an N-terminal alpha-helical hairpin domain and a C-terminal alpha/beta domai ...	Sporulation initiation phospho-transferase B or SpoOB is part of a phospho-relay that initiates sporulation in Bacillus subtilis. Spo0B is a two-domain protein consisting of an N-terminal alpha-helical hairpin domain and a C-terminal alpha/beta domain, represented by this family. Two subunits of Spo0B dimerise by a parallel association of helical hairpins to form a novel four-helix bundle from which the active histidine - involved in the auto-phosphorylation - protrudes. In the phospho-relay, the signal-receptor histidine kinases are dephosphorylated by a common response regulator, Spo0F. Spo0B then takes phosphorylated Spo0F as substrate hereby mediating the transfer of a phosphoryl group to Spo0A, the ultimate transcription factor.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	PROTEIN (SPORULATION RESPONSE REGULATORY PROTEIN)	molecular sensor activity catalytic activity, acting on a protein 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 molecular function regulator activity catalytic activity	sporulation resulting in formation of a cellular spore developmental process anatomical structure morphogenesis anatomical structure formation involved in morphogenesis anatomical structure development sporulation	cellular anatomical structure intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR039506	SpoOB, alpha-helical domain	Domain
A, B	IPR037100	Sporulation initiation phosphotransferase B, C-terminal domain superfamily	Homologous Superfamily
A, B	IPR016122	Sporulation initiation phosphotransferase B, C-terminal	Domain
A, B	IPR016120	Signal transduction histidine kinase, sporulation regulator SpoOB	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.