Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species
A	d4juga1	All beta proteins	Viral protein domain	Viral protein domain	Influenza hemagglutinin headpiece	Hemagglutinin	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
A	d4juga2	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
C	d4jugc1	All beta proteins	Viral protein domain	Viral protein domain	Influenza hemagglutinin headpiece	Hemagglutinin	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
C	d4jugc2	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
E	d4juge1	All beta proteins	Viral protein domain	Viral protein domain	Influenza hemagglutinin headpiece	Hemagglutinin	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
E	d4juge2	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
G	d4jugg1	All beta proteins	Viral protein domain	Viral protein domain	Influenza hemagglutinin headpiece	Hemagglutinin	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
G	d4jugg2	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
I	d4jugi1	All beta proteins	Viral protein domain	Viral protein domain	Influenza hemagglutinin headpiece	Hemagglutinin	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
I	d4jugi2	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
K	d4jugk1	All beta proteins	Viral protein domain	Viral protein domain	Influenza hemagglutinin headpiece	Hemagglutinin	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
K	d4jugk2	Artifacts	Tags	Tags	Tags	C-terminal Tags	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
B	d4jugb_	Coiled coil proteins	Stalk segment of viral fusion proteins	Influenza hemagglutinin (stalk)	Influenza hemagglutinin (stalk)	Influenza hemagglutinin (stalk)	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
D	d4jugd_	Coiled coil proteins	Stalk segment of viral fusion proteins	Influenza hemagglutinin (stalk)	Influenza hemagglutinin (stalk)	Influenza hemagglutinin (stalk)	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
F	d4jugf_	Coiled coil proteins	Stalk segment of viral fusion proteins	Influenza hemagglutinin (stalk)	Influenza hemagglutinin (stalk)	Influenza hemagglutinin (stalk)	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
H	d4jugh_	Coiled coil proteins	Stalk segment of viral fusion proteins	Influenza hemagglutinin (stalk)	Influenza hemagglutinin (stalk)	Influenza hemagglutinin (stalk)	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
J	d4jugj_	Coiled coil proteins	Stalk segment of viral fusion proteins	Influenza hemagglutinin (stalk)	Influenza hemagglutinin (stalk)	Influenza hemagglutinin (stalk)	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]
L	d4jugl_	Coiled coil proteins	Stalk segment of viral fusion proteins	Influenza hemagglutinin (stalk)	Influenza hemagglutinin (stalk)	Influenza hemagglutinin (stalk)	(Influenza A virus (A/South Carolina/1/1918(H1N1)) ) [TaxId: 59375 ]

Chain	Domain	Class	Architecture	Topology	Homology
A	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2
A	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2
A	3.90.209.20	Alpha Beta	Alpha-Beta Complex	Hemagglutinin (Ha1 Chain)	Chain: A
C	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2
C	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2
C	3.90.209.20	Alpha Beta	Alpha-Beta Complex	Hemagglutinin (Ha1 Chain)	Chain: A
E	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2
E	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2
E	3.90.209.20	Alpha Beta	Alpha-Beta Complex	Hemagglutinin (Ha1 Chain)	Chain: A
G	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2
G	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2
G	3.90.209.20	Alpha Beta	Alpha-Beta Complex	Hemagglutinin (Ha1 Chain)	Chain: A
I	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2
I	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2
I	3.90.209.20	Alpha Beta	Alpha-Beta Complex	Hemagglutinin (Ha1 Chain)	Chain: A
K	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2
K	2.10.77.10	Mainly Beta	Ribbon	Hemagglutinin	Chain A, domain 2
K	3.90.209.20	Alpha Beta	Alpha-Beta Complex	Hemagglutinin (Ha1 Chain)	Chain: A
B	3.90.20.10	Alpha Beta	Alpha-Beta Complex	Hemagglutinin Ectodomain	Chain B
D	3.90.20.10	Alpha Beta	Alpha-Beta Complex	Hemagglutinin Ectodomain	Chain B
F	3.90.20.10	Alpha Beta	Alpha-Beta Complex	Hemagglutinin Ectodomain	Chain B
H	3.90.20.10	Alpha Beta	Alpha-Beta Complex	Hemagglutinin Ectodomain	Chain B
J	3.90.20.10	Alpha Beta	Alpha-Beta Complex	Hemagglutinin Ectodomain	Chain B
L	3.90.20.10	Alpha Beta	Alpha-Beta Complex	Hemagglutinin Ectodomain	Chain B

Chains	Accession	Identifier	Description	Comments	Source
A, C, E, G, I, K	PF00509	Haemagglutinin (Hemagglutinin)	Haemagglutinin	-	Family
B, D, F, H, J, L	PF00509	Haemagglutinin (Hemagglutinin)	Haemagglutinin	-	Family

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C, E, G, I, K	Hemagglutinin	binding host cell surface receptor binding host cell surface binding	cellular process viral process cellular component organization viral life cycle fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell biological process involved in symbiotic interaction entry into host biological process involved in interspecies interaction between organisms multi-organism cellular process multi-organism membrane fusion multi-organism membrane organization viral entry into host cell biological process involved in interaction with host multi-organism process movement in host environment membrane organization membrane fusion cellular component organization or biogenesis fusion of virus membrane with host plasma membrane virion assembly viral release from host cell exit from host exit from host cell non-lytic viral release viral budding viral budding from plasma membrane virion attachment to host cell biological adhesion adhesion of symbiont to host adhesion of symbiont to host cell	host cellular component host cell plasma membrane host cell part host cell membrane host cell cellular anatomical entity membrane integral component of membrane intrinsic component of membrane virion viral envelope viral membrane virion part virion membrane
B, D, F, H, J, L	Hemagglutinin	binding host cell surface receptor binding host cell surface binding	cellular process viral process cellular component organization viral life cycle fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell biological process involved in symbiotic interaction entry into host biological process involved in interspecies interaction between organisms multi-organism cellular process multi-organism membrane fusion multi-organism membrane organization viral entry into host cell biological process involved in interaction with host multi-organism process movement in host environment membrane organization membrane fusion cellular component organization or biogenesis fusion of virus membrane with host plasma membrane virion assembly viral release from host cell exit from host exit from host cell non-lytic viral release viral budding viral budding from plasma membrane virion attachment to host cell biological adhesion adhesion of symbiont to host adhesion of symbiont to host cell	host cellular component host cell plasma membrane host cell part host cell membrane host cell cellular anatomical entity membrane integral component of membrane intrinsic component of membrane virion viral envelope viral membrane virion part virion membrane

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4JUG

Crystal structure of 1918 pandemic influenza virus hemagglutinin mutant D225G

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