Annotations: 4N4X

Crystal Structure of the MBP fused human SPLUNC1 (native form)

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Type 2 solute binding protein-like	8058187	3000083	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	V-set	e4n4xA1	A: beta barrels	X: DP domain	H: DP domain	T: DP domain	F: V-set	ECOD (v294.2)
A	Ldh_1_C	e4n4xA2	A: beta barrels	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Ldh_1_C	ECOD (v294.2)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF01547	Bacterial extracellular solute-binding protein (SBP_bac_1)	Bacterial extracellular solute-binding protein	-	Family
A	PF01273	LBP / BPI / CETP family, N-terminal domain (LBP_BPI_CETP)	LBP / BPI / CETP family, N-terminal domain	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Maltose-binding periplasmic/Palate lung and nasal epithelium clone fusion protein	transporter activity carbohydrate transmembrane transporter activity transmembrane transporter activity oligosaccharide binding binding disaccharide binding carbohydrate binding maltose binding lipid binding	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process cell chemotaxis chemotaxis response to external stimulus cellular response to chemical stimulus taxis response to chemical cell migration cell motility cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process cell chemotaxis chemotaxis response to external stimulus cellular response to chemical stimulus taxis response to chemical cell migration cell motility locomotion localization transport carbohydrate transport oligosaccharide transport disaccharide transport establishment of localization maltose transport polysaccharide localization dextrin transport macromolecule localization maltodextrin transmembrane transport polysaccharide transport response to disaccharide response to oxygen-containing compound detection of maltose stimulus detection of stimulus response to carbohydrate detection of chemical stimulus detection of disaccharide stimulus response to maltose detection of carbohydrate stimulus regulation of localization regulation of cellular process monoatomic ion transmembrane transport sodium ion transmembrane transport regulation of monoatomic ion transmembrane transport regulation of sodium ion transport regulation of sodium ion transmembrane transport metal ion transport monoatomic cation transmembrane transport monoatomic ion transport regulation of metal ion transport monoatomic cation transport regulation of biological process regulation of transport regulation of monoatomic ion transport biological regulation transmembrane transport regulation of transmembrane transport regulation of monoatomic cation transmembrane transport sodium ion transport immune response in gut-associated lymphoid tissue immune response immune response in nasopharyngeal-associated lymphoid tissue immune system process multicellular organismal process multicellular organismal-level homeostasis chemical homeostasis homeostatic process multicellular organismal-level chemical homeostasis surfactant homeostasis humoral immune response biological process involved in interspecies interaction between organisms response to other organism defense response defense response to symbiont antimicrobial humoral response response to biotic stimulus antimicrobial humoral immune response mediated by antimicrobial peptide defense response to other organism response to external biotic stimulus cell aggregation biofilm formation biological process involved in intraspecies interaction between organisms regulation of single-species biofilm formation in or on host organism negative regulation of biological process single-species biofilm formation in or on host organism single-species biofilm formation negative regulation of single-species biofilm formation in or on host organism adhesion of symbiont to host biological process involved in interaction with host aggregation of unicellular organisms biological process involved in symbiotic interaction negative regulation of single-species biofilm formation regulation of single-species biofilm formation negative regulation of cellular process regulation of biological process involved in symbiotic interaction antibacterial humoral response defense response to bacterium response to bacterium innate immune response regulation of body fluid levels multicellular organismal-level water homeostasis regulation of biological quality defense response to virus response to virus	ATPase dependent transmembrane transport complex protein-containing complex plasma membrane protein complex membrane plasma membrane membrane protein complex transporter complex ATP-binding cassette (ABC) transporter complex cell periphery cellular anatomical structure transmembrane transporter complex ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing maltose transport complex extracellular region ATPase dependent transmembrane transport complex protein-containing complex plasma membrane protein complex membrane plasma membrane membrane protein complex transporter complex ATP-binding cassette (ABC) transporter complex cell periphery cellular anatomical structure transmembrane transporter complex ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing maltose transport complex extracellular region periplasmic space outer membrane-bounded periplasmic space cell envelope

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR006061	Solute-binding family 1, conserved site	Conserved Site
A	IPR006060	Maltose/Cyclodextrin ABC transporter, substrate-binding protein	Family
A	IPR006059	Bacterial-type extracellular solute-binding protein	Family
A	IPR017943	Bactericidal permeability-increasing protein, alpha/beta domain superfamily	Homologous Superfamily
A	IPR017942	Lipid-binding serum glycoprotein, N-terminal	Domain
A	IPR051902	BPI fold-containing superfamily member	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	: Q9NP55	alcohol-related birth defect fetal alcohol spectrum disorder fetal alcohol syndrome Alcohol Related Neurodevelopmental Disorder diabetes mellitus head and neck cancer lung carcinoma ovarian cancer large cell medulloblastoma non-small cell lung carcinoma partial fetal alcohol syndrome chronic obstructive pulmonary disease lung adenocarcinoma osteosarcoma pituitary cancer

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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.