Annotations: 7C1I

Crystal structure of histidine-containing phosphotransfer protein B (HptB) from Pseudomonas aeruginosa PAO1

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
F		e7c1iF1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F:	ECOD (v295.2)
E		e7c1iE1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F:	ECOD (v295.2)
D		e7c1iD1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F:	ECOD (v295.2)
C		e7c1iC1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F:	ECOD (v295.2)
B		e7c1iB1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F:	ECOD (v295.2)
A		e7c1iA1	A: alpha arrays	X: putative RnfG subunit of electron transport complex	H: putative RnfG subunit of electron transport complex	T: Aspartate/ornithine carbamoyltransferase	F:	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

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

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E A, B, C, D, E, F	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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E A, B, C, D, E, F	Histidine kinase	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	chemotaxis positive regulation of locomotion regulation of biological process response to stimulus regulation of response to external stimulus biological regulation positive regulation of biological process response to external stimulus regulation of chemotaxis positive regulation of chemotaxis positive regulation of response to stimulus positive regulation of response to external stimulus taxis regulation of response to stimulus response to chemical chemotaxis positive regulation of locomotion regulation of biological process response to stimulus regulation of response to external stimulus biological regulation positive regulation of biological process response to external stimulus regulation of chemotaxis positive regulation of chemotaxis positive regulation of response to stimulus positive regulation of response to external stimulus taxis regulation of response to stimulus response to chemical regulation of locomotion locomotion regulation of cell motility regulation of cellular process cellular process cell motility cellular response to stimulus phosphorelay signal transduction system signaling intracellular signal transduction cell communication signal transduction cell aggregation biofilm formation biological process involved in intraspecies interaction between organisms negative regulation of biological process single-species biofilm formation aggregation of unicellular organisms negative regulation of single-species biofilm formation regulation of single-species biofilm formation negative regulation of cellular process	cellular anatomical structure intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E A, B, C, D, E, F	IPR036641	HPT domain superfamily	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F	IPR008207	Signal transduction histidine kinase, phosphotransfer (Hpt) 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.