2Z4I

Crystal structure of the Cpx pathway activator NlpE from Escherichia coli

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	SCOP2 Family	NlpE-like	8045495	4004496	SCOP2 (2022-06-29)
A	SCOP2 Family	NplE C-terminal domain-like	8046588	4005175	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Lipocalins	8052632	3001332	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Nucleic acid-binding proteins	8052633	3000135	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	Nucleic acid-binding proteins	8052633	3000135	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Lipocalins	8052632	3001332	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	NlpE_C	e2z4iA1	A: beta barrels	X: OB-fold	H: NlpE C-terminal domain (From Topology)	T: NlpE C-terminal domain	F: NlpE_C	ECOD (1.6)
A	NlpE	e2z4iA2	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: NlpE	ECOD (1.6)
B	NlpE_C	e2z4iB1	A: beta barrels	X: OB-fold	H: NlpE C-terminal domain (From Topology)	T: NlpE C-terminal domain	F: NlpE_C	ECOD (1.6)
B	NlpE	e2z4iB2	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: NlpE	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.40.128.300	Mainly Beta	Beta Barrel	Lipocalin	NlpE, N-terminal domain	CATH (4.3.0)
A	2.40.50.540	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	NlpE, C-terminal domain	CATH (4.3.0)
B	2.40.128.300	Mainly Beta	Beta Barrel	Lipocalin	NlpE, N-terminal domain	CATH (4.3.0)
B	2.40.50.540	Mainly Beta	Beta Barrel	OB fold (Dihydrolipoamide Acetyltransferase, E2P)	NlpE, C-terminal domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF04170	NlpE N-terminal domain (NlpE)	NlpE N-terminal domain	This family represents a bacterial outer membrane lipoprotein that is necessary for signalling by the Cpx pathway [1]. This pathway responds to cell envelope disturbances and increases the expression of periplasmic protein folding and degradation fac ...	This family represents a bacterial outer membrane lipoprotein that is necessary for signalling by the Cpx pathway [1]. This pathway responds to cell envelope disturbances and increases the expression of periplasmic protein folding and degradation factors. While the molecular function of the NlpE protein is unknown, it may be involved in detecting bacterial adhesion to abiotic surfaces. In Escherichia coli and Salmonella typhi, NlpE is also known to confer copper tolerance in copper-sensitive strains of Escherichia coli, and may be involved in copper efflux and delivery of copper to copper-dependent enzymes [2].	Domain
A, B	PF17185	NlpE C-terminal OB domain (NlpE_C)	NlpE C-terminal OB domain	This family represents a bacterial outer membrane lipoprotein that is necessary for signalling by the Cpx pathway [1]. This pathway responds to cell envelope disturbances and increases the expression of periplasmic protein folding and degradation fac ...	This family represents a bacterial outer membrane lipoprotein that is necessary for signalling by the Cpx pathway [1]. This pathway responds to cell envelope disturbances and increases the expression of periplasmic protein folding and degradation factors. While the molecular function of the NlpE protein is unknown, it may be involved in detecting bacterial adhesion to abiotic surfaces. In Escherichia coli and Salmonella typhi, NlpE is also known to confer copper tolerance in copper-sensitive strains of Escherichia coli, and may be involved in copper efflux and delivery of copper to copper-dependent enzymes [2]. This domain is found at the C-terminus of the NlpE protein [3].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Copper homeostasis protein cutF	identical protein binding protein binding binding	cellular response to stimulus cellular response to stress response to stimulus response to stress cellular process cellular response to cell envelope stress response to copper ion response to metal ion response to chemical stress response to copper ion stress response to metal ion cell adhesion regulation of biological process regulation of cellular process cellular response to stimulus cellular response to stress response to stimulus response to stress cellular process cellular response to cell envelope stress response to copper ion response to metal ion response to chemical stress response to copper ion stress response to metal ion cell adhesion regulation of biological process regulation of cellular process regulation of cell-substrate adhesion regulation of cell adhesion biological regulation cell-substrate adhesion	cell periphery cell outer membrane cellular anatomical structure external encapsulating structure membrane cell envelope outer membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR033450	NlpE, C-terminal OB domain	Domain
A, B	IPR007298	Copper resistance lipoprotein NlpE	Family
A, B	IPR038139	NlpE, C-terminal domain superfamily	Homologous Superfamily
A, B	IPR043176	NlpE, N-terminal domain superfamily	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.