Annotations: 4NFD

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Hemagglutinin	e4nfdA1	A: alpha bundles	X: Outer membrane meander beta-barrels	H: Porins	T: Porin	F: Hemagglutinin	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Paired immunoglobulin-like type 2 receptor beta	protein binding binding MHC class I protein binding signaling receptor binding MHC protein binding	cellular response to stimulus regulation of cellular process positive regulation of phosphorylation response to stimulus regulation of catalytic activity regulation of transferase activity positive regulation of phosphate metabolic process cell surface receptor protein tyrosine kinase signaling pathway regulation of primary metabolic process cell communication cellular component biogenesis positive regulation of metabolic process cellular component assembly phosphate-containing compound metabolic process cellular response to stimulus regulation of cellular process positive regulation of phosphorylation response to stimulus regulation of catalytic activity regulation of transferase activity positive regulation of phosphate metabolic process cell surface receptor protein tyrosine kinase signaling pathway regulation of primary metabolic process cell communication cellular component biogenesis positive regulation of metabolic process cellular component assembly phosphate-containing compound metabolic process positive regulation of macromolecule metabolic process signal transduction phosphorus metabolic process protein modification process positive regulation of protein phosphorylation activation of transmembrane receptor protein tyrosine kinase activity regulation of biological process protein phosphorylation positive regulation of phosphorus metabolic process phosphorylation regulation of protein metabolic process primary metabolic process regulation of molecular function positive regulation of kinase activity regulation of kinase activity activation of protein kinase activity macromolecule modification regulation of phosphorus metabolic process metabolic process macromolecule metabolic process regulation of metabolic process regulation of protein modification process regulation of protein phosphorylation signaling positive regulation of protein metabolic process positive regulation of biological process cellular component organization positive regulation of molecular function positive regulation of protein modification process protein-containing complex assembly cellular component organization or biogenesis protein metabolic process positive regulation of protein kinase activity enzyme-linked receptor protein signaling pathway positive regulation of cellular process cell surface receptor signaling pathway protein-containing complex organization biological regulation positive regulation of catalytic activity regulation of protein kinase activity regulation of macromolecule metabolic process cellular process regulation of phosphorylation	cell periphery cellular anatomical structure plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR051694	Immunoregulatory Receptor-like	Family
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A	IPR003599	Immunoglobulin domain subtype	Domain
A	IPR007110	Immunoglobulin-like domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q9UKJ0	age-related macular degeneration wet macular degeneration

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.