Annotations: 3MMN

Crystal structure of the receiver domain of the histidine kinase CKI1 from Arabidopsis thaliana complexed with Mg2+

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	CheY-like	8074337	3001156	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	Globin	e3mmnA1	A: a/b three-layered sandwiches	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: Globin	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.2300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	Response regulator	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00072	Response regulator receiver domain (Response_reg)	Response regulator receiver domain	This domain receives the signal from the sensor partner in bacterial two-component systems. It is usually found N-terminal to a DNA binding effector domain.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Histidine kinase homolog	identical protein binding protein binding binding protein homodimerization activity protein dimerization activity catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity phosphotransferase activity, nitrogenous group as acceptor phosphotransferase activity, alcohol group as acceptor protein histidine kinase activity transferase activity, transferring phosphorus-containing groups identical protein binding protein binding binding protein homodimerization activity protein dimerization activity catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity phosphotransferase activity, nitrogenous group as acceptor phosphotransferase activity, alcohol group as acceptor protein histidine kinase activity transferase activity, transferring phosphorus-containing groups molecular sensor activity phosphorelay sensor kinase activity molecular function regulator activity molecular transducer activity phosphorelay response regulator activity	cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus signaling response to endogenous stimulus biological regulation cellular response to cytokinin stimulus hormone-mediated signaling pathway cell communication cellular response to endogenous stimulus cytokinin-activated signaling pathway cellular response to chemical stimulus response to hormone response to cytokinin cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus signaling response to endogenous stimulus biological regulation cellular response to cytokinin stimulus hormone-mediated signaling pathway cell communication cellular response to endogenous stimulus cytokinin-activated signaling pathway cellular response to chemical stimulus response to hormone response to cytokinin response to chemical cellular process signal transduction cellular response to hormone stimulus developmental process multicellular organism development multicellular organismal process gametophyte development anatomical structure development embryo sac development phloem or xylem histogenesis tissue development secondary growth lateral growth growth	cellular anatomical structure membrane cell periphery plasma membrane cell-cell junction symplast anchoring junction cell junction plasmodesma

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR011006	CheY-like superfamily	Homologous Superfamily
A	IPR004358	Signal transduction histidine kinase-related protein, C-terminal	Domain
A	IPR001789	Signal transduction response regulator, receiver domain	Domain
A	IPR036097	Signal transduction histidine kinase, dimerisation/phosphoacceptor domain superfamily	Homologous Superfamily
A	IPR036890	Histidine kinase/HSP90-like ATPase superfamily	Homologous Superfamily
A	IPR003661	Signal transduction histidine kinase, dimerisation/phosphoacceptor domain	Domain
A	IPR050956	Two-component system histidine kinase	Family
A	IPR003594	Histidine kinase/HSP90-like ATPase domain	Domain
A	IPR005467	Histidine kinase domain	Domain

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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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.