Annotations: 9H6E

Complex of Histidine-containing phosphotransfer 1 (AHP1) and Response regulator 1 (ARR1) from A. thaliana

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
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 [auth C]	SCOP2B Superfamily	Histidine-containing phosphotransfer domain, HPT domain	8086568	3001634	SCOP2B (2022-06-29)
B [auth A]	SCOP2B Superfamily	Histidine-containing phosphotransfer domain, HPT domain	8086568	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 [auth C]	Stathmin	e9h6eC01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Stathmin	ECOD (v294.2)
B [auth A]	Beta-Casp	e9h6eA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Beta-Casp	ECOD (v294.2)
C [auth D]	Stathmin	e9h6eD01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Stathmin	ECOD (v294.2)
D [auth B]	Beta-Casp	e9h6eB1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: Beta-Casp	ECOD (v294.2)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth C], B [auth A]	PF01627	Hpt domain (Hpt)	Hpt domain	The histidine-containing phosphotransfer (HPt) domain is a novel protein module with an active histidine residue that mediates phosphotransfer reactions in the two-component signaling systems. A multistep phosphorelay involving the HPt domain has bee ...	The histidine-containing phosphotransfer (HPt) domain is a novel protein module with an active histidine residue that mediates phosphotransfer reactions in the two-component signaling systems. A multistep phosphorelay involving the HPt domain has been suggested for these signaling pathways. The crystal structure of the HPt domain of the anaerobic sensor kinase ArcB has been determined [1]. The domain consists of six alpha helices containing a four-helix bundle-folding. The pattern of sequence similarity of the HPt domains of ArcB and components in other signaling systems can be interpreted in light of the three-dimensional structure and supports the conclusion that the HPt domains have a common structural motif both in prokaryotes and eukaryotes. In S. cerevisiae ypd1p this domain has been shown to contain a binding surface for Ssk1p (response regulator receiver domain containing protein Pfam:PF00072) [2].	Domain
C [auth D], D [auth B]	PF00249	Myb-like DNA-binding domain (Myb_DNA-binding)	Myb-like DNA-binding domain	This family contains the DNA binding domains from Myb proteins, as well as the SANT domain family [1].	Domain
C [auth D], D [auth B]	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 [auth C], B [auth A]	Histidine-containing phosphotransfer protein 1	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 phosphotransferase activity, alcohol group as acceptor 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 phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups	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 phosphorelay signal transduction system intracellular signal transduction developmental process multicellular organism development multicellular organismal process gametophyte development anatomical structure development embryo sac development growth cell growth multidimensional cell growth	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle
C [auth D], D [auth B]	Two-component response regulator ARR1	DNA binding sequence-specific DNA binding sequence-specific double-stranded DNA binding transcription cis-regulatory region binding binding double-stranded DNA binding nucleic acid binding transcription regulatory region nucleic acid binding transcription regulator activity DNA-binding transcription factor activity molecular transducer activity phosphorelay response regulator activity	developmental process multicellular organism development multicellular organismal process anatomical structure development shoot system development system development response to acid chemical response to stimulus response to stress response to chemical response to oxygen-containing compound response to abiotic stimulus response to water response to water deprivation developmental process multicellular organism development multicellular organismal process anatomical structure development shoot system development system development response to acid chemical response to stimulus response to stress response to chemical response to oxygen-containing compound response to abiotic stimulus response to water response to water deprivation cellular response to stimulus response to endogenous stimulus cellular response to cytokinin stimulus cellular response to endogenous stimulus cellular response to chemical stimulus response to hormone response to cytokinin cellular process cellular response to hormone stimulus regulation of biological process regulation of cellular process signaling biological regulation hormone-mediated signaling pathway cell communication cytokinin-activated signaling pathway signal transduction regulation of growth reproductive system development regulation of developmental growth regulation of developmental process developmental growth reproductive process growth regulation of seed growth developmental process involved in reproduction fruit development seed development seed growth reproductive structure development post-embryonic development maintenance of shoot apical meristem identity meristem development meristem maintenance maintenance of cell number tissue development maintenance of meristem identity stem cell population maintenance regulation of biosynthetic process pigment metabolic process porphyrin-containing compound biosynthetic process tetrapyrrole metabolic process chlorophyll metabolic process pigment biosynthetic process tetrapyrrole biosynthetic process regulation of chlorophyll metabolic process biosynthetic process regulation of tetrapyrrole metabolic process metabolic process porphyrin-containing compound metabolic process regulation of tetrapyrrole biosynthetic process regulation of metabolic process chlorophyll biosynthetic process regulation of chlorophyll biosynthetic process RNA metabolic process primary metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription nucleic acid biosynthetic process macromolecule metabolic process meristem initiation axillary shoot meristem initiation shoot system morphogenesis shoot axis formation anatomical structure morphogenesis morphogenesis of a branching structure secondary shoot formation anatomical structure formation involved in morphogenesis anatomical structure arrangement plant organ formation meristem structural organization plant organ development root development root system development flavonoid metabolic process regulation of primary metabolic process anthocyanin-containing compound metabolic process regulation of anthocyanin metabolic process callus formation wound healing response to wounding primary root development root meristem growth meristem growth root morphogenesis regulation of root meristem growth regulation of meristem growth plant organ morphogenesis regulation of signal transduction regulation of cytokinin-activated signaling pathway regulation of signaling regulation of response to stimulus regulation of cell communication	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle intracellular organelle plastid organelle intracellular membrane-bounded organelle chloroplast nucleus

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth C], B [auth A]	IPR045871	Histidine-containing phosphotransfer protein 1-5/Phosphorelay intermediate protein YPD1	Family
A [auth C], B [auth A]	IPR036641	HPT domain superfamily	Homologous Superfamily
A [auth C], B [auth A]	IPR008207	Signal transduction histidine kinase, phosphotransfer (Hpt) domain	Domain
C [auth D], D [auth B]	IPR009057	Homeodomain-like superfamily	Homologous Superfamily
C [auth D], D [auth B]	IPR011006	CheY-like superfamily	Homologous Superfamily
C [auth D], D [auth B]	IPR017930	Myb domain	Domain
C [auth D], D [auth B]	IPR017053	Response regulator B-type, plant	Family
C [auth D], D [auth B]	IPR006447	Myb domain, plants	Domain
C [auth D], D [auth B]	IPR001789	Signal transduction response regulator, receiver domain	Domain
C [auth D], D [auth B]	IPR045279	Two-component response regulator ARR-like	Family
C [auth D], D [auth B]	IPR001005	SANT/Myb 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.