Annotations: 4L9B

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Hemagglutinin	e4l9bA1	A: a/b three-layered sandwiches	X: Outer membrane meander beta-barrels	H: Porins	T: Porin	F: Hemagglutinin	ECOD (v294.1)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.520.10	Mainly Beta	Sandwich	Triple-stranded beta-helix	Phage fibre proteins	CATH (4.3.0)
A	2.60.120.1400	Mainly Beta	Sandwich	Jelly Rolls	Viral head domain of polysaccharide receptor-binding protein-like	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF22446	Head N-terminal domain (Lac_Phage_Head)	Head N-terminal domain	This entry represents a compact jelly-roll beta-sandwich domain (head domain) of the polysaccharide receptor-binding protein from Lactococcus phage 1358 [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Receptor Binding Protein	cation binding ion binding binding metal ion binding small molecule binding	-	-

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.