Annotations: 4FQR

Crystal structure of broadly neutralizing antibody C05 bound to H3 influenza hemagglutinin

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Protein Modification Annotation

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Influenza hemagglutinin domain-like	8094281	3001342	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Influenza hemagglutinin domain-like	8094281	3001342	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Influenza hemagglutinin domain-like	8094281	3001342	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	Influenza hemagglutinin domain-like	8094281	3001342	SCOP2B (2022-06-29)
I	SCOP2B Superfamily	Influenza hemagglutinin domain-like	8094281	3001342	SCOP2B (2022-06-29)
K	SCOP2B Superfamily	Influenza hemagglutinin domain-like	8094281	3001342	SCOP2B (2022-06-29)
M	SCOP2B Superfamily	Influenza hemagglutinin domain-like	8094281	3001342	SCOP2B (2022-06-29)
O	SCOP2B Superfamily	Influenza hemagglutinin domain-like	8094281	3001342	SCOP2B (2022-06-29)
Q	SCOP2B Superfamily	Influenza hemagglutinin domain-like	8094281	3001342	SCOP2B (2022-06-29)
S	SCOP2B Superfamily	Influenza hemagglutinin domain-like	8094281	3001342	SCOP2B (2022-06-29)
U	SCOP2B Superfamily	Influenza hemagglutinin domain-like	8094281	3001342	SCOP2B (2022-06-29)
W	SCOP2B Superfamily	Influenza hemagglutinin domain-like	8094281	3001342	SCOP2B (2022-06-29)
X	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8088048	3001616	SCOP2B (2022-06-29)
V	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8088048	3001616	SCOP2B (2022-06-29)
T	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8088048	3001616	SCOP2B (2022-06-29)
R	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8088048	3001616	SCOP2B (2022-06-29)
P	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8088048	3001616	SCOP2B (2022-06-29)
N	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8088048	3001616	SCOP2B (2022-06-29)
L	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8088048	3001616	SCOP2B (2022-06-29)
J	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8088048	3001616	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8088048	3001616	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8088048	3001616	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8088048	3001616	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Influenza hemagglutinin (stalk)	8088048	3001616	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	RRM_1	e4fqrA1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
C	RRM_1	e4fqrC1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
E	RRM_1	e4fqrE1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
G	RRM_1	e4fqrG1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
I	RRM_1	e4fqrI1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
K	RRM_1	e4fqrK1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
M	RRM_1	e4fqrM1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
O	RRM_1	e4fqrO1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
Q	RRM_1	e4fqrQ1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
S	RRM_1	e4fqrS1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
U	RRM_1	e4fqrU1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
W	RRM_1	e4fqrW1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
Z [auth b]	Ribosomal_L31	e4fqrb1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: Ribosomal_L31	ECOD (v295)
VA [auth x]	Ribosomal_L31	e4fqrx1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: Ribosomal_L31	ECOD (v295)
VA [auth x]	V-set	e4fqrx4	A: alpha arrays	X: Subtilisin-like	H: Subtilisin-like	T: Subtilisin-like	F: V-set	ECOD (v295)
TA [auth v]	Ribosomal_L31	e4fqrv1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: Ribosomal_L31	ECOD (v295)
RA [auth t]	Ribosomal_L31	e4fqrt1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: Ribosomal_L31	ECOD (v295)
PA [auth r]	Ribosomal_L31	e4fqrr1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: Ribosomal_L31	ECOD (v295)
NA [auth p]	Ribosomal_L31	e4fqrp1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: Ribosomal_L31	ECOD (v295)
LA [auth n]	Ribosomal_L31	e4fqrn1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: Ribosomal_L31	ECOD (v295)
JA [auth l]	Ribosomal_L31	e4fqrl1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: Ribosomal_L31	ECOD (v295)
HA [auth j]	Ribosomal_L31	e4fqrj1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: Ribosomal_L31	ECOD (v295)
FA [auth h]	Ribosomal_L31	e4fqrh1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: Ribosomal_L31	ECOD (v295)
DA [auth f]	Ribosomal_L31	e4fqrf1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: Ribosomal_L31	ECOD (v295)
BA [auth d]	Ribosomal_L31	e4fqrd1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: Ribosomal_L31	ECOD (v295)
Y [auth a]	RRM_1	e4fqra1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
UA [auth w]	RRM_1	e4fqrw1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
SA [auth u]	RRM_1	e4fqru1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
QA [auth s]	RRM_1	e4fqrs1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
OA [auth q]	RRM_1	e4fqrq1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
MA [auth o]	RRM_1	e4fqro1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
KA [auth m]	RRM_1	e4fqrm1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
IA [auth k]	RRM_1	e4fqrk1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
GA [auth i]	RRM_1	e4fqri1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
EA [auth g]	RRM_1	e4fqrg1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
CA [auth e]	RRM_1	e4fqre1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
AA [auth c]	RRM_1	e4fqrc1	A: alpha arrays	X: beta-Grasp	H: HTH	T: winged helix domain	F: RRM_1	ECOD (v295)
X	Med6	e4fqrX1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Med6	ECOD (v295)
V	Med6	e4fqrV1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Med6	ECOD (v295)
T	Med6	e4fqrT1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Med6	ECOD (v295)
R	Med6	e4fqrR1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Med6	ECOD (v295)
P	Med6	e4fqrP1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Med6	ECOD (v295)
N	Med6	e4fqrN1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Med6	ECOD (v295)
L	Med6	e4fqrL1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Med6	ECOD (v295)
J	Med6	e4fqrJ1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Med6	ECOD (v295)
H	Med6	e4fqrH1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Med6	ECOD (v295)
F	Med6	e4fqrF1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Med6	ECOD (v295)
D	Med6	e4fqrD1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Med6	ECOD (v295)
B	Med6	e4fqrB1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: Med6	ECOD (v295)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
BA [auth d], DA [auth f], FA [auth h], HA [auth j], JA [auth l], BA [auth d], DA [auth f], FA [auth h], HA [auth j], JA [auth l], LA [auth n], NA [auth p], PA [auth r], RA [auth t], TA [auth v], VA [auth x], Z [auth b]	Light Chain	IGKV1	Kappa	broadly neutralizing antibody c05, heavy chain	SAbDab (2026-06-26)
AA [auth c], CA [auth e], EA [auth g], GA [auth i], IA [auth k], AA [auth c], CA [auth e], EA [auth g], GA [auth i], IA [auth k], KA [auth m], MA [auth o], OA [auth q], QA [auth s], SA [auth u], UA [auth w], Y [auth a]	Heavy Chain	IGHV3	-	broadly neutralizing antibody c05, heavy chain	SAbDab (2026-06-26)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, C, E, G, I A, C, E, G, I, K, M, O, Q, S, U, W	Hemagglutinin HA1 chain	host cell surface binding binding host cell surface receptor binding	viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane cellular process cellular component organization or biogenesis virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral life cycle adhesion of symbiont to host viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane cellular process cellular component organization or biogenesis virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction non-lytic viral release viral budding virion assembly exit from host cell viral budding from plasma membrane viral release from host cell import into cell receptor-mediated endocytosis of virus by host cell transport establishment of localization vesicle-mediated transport localization symbiont entry into host cell clathrin-dependent endocytosis symbiont entry into host clathrin-dependent endocytosis of virus by host cell receptor-mediated endocytosis endocytosis endocytosis involved in viral entry into host cell	cellular anatomical structure membrane virion component virion membrane viral membrane viral envelope host cell plasma membrane host cellular component host cell part host cell membrane other organism part
BA [auth d], DA [auth f], FA [auth h], HA [auth j], JA [auth l], BA [auth d], DA [auth f], FA [auth h], HA [auth j], JA [auth l], LA [auth n], NA [auth p], PA [auth r], RA [auth t], TA [auth v], VA [auth x], Z [auth b]	Broadly neutralizing antibody C05, light chain	-	-	-
AA [auth c], CA [auth e], EA [auth g], GA [auth i], IA [auth k], AA [auth c], CA [auth e], EA [auth g], GA [auth i], IA [auth k], KA [auth m], MA [auth o], OA [auth q], QA [auth s], SA [auth u], UA [auth w], Y [auth a]	Broadly neutralizing antibody C05, heavy chain	-	-	-
B, D, F, H, J B, D, F, H, J, L, N, P, R, T, V, X	Hemagglutinin HA2 chain	host cell surface binding binding host cell surface receptor binding	viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane cellular process cellular component organization or biogenesis virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral life cycle adhesion of symbiont to host viral process fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell membrane organization cellular component organization membrane fusion fusion of virus membrane with host plasma membrane cellular process cellular component organization or biogenesis virion attachment to host cell biological process involved in interspecies interaction between organisms adhesion of symbiont to host cell viral life cycle adhesion of symbiont to host biological process involved in interaction with host biological process involved in symbiotic interaction non-lytic viral release viral budding virion assembly exit from host cell viral budding from plasma membrane viral release from host cell import into cell receptor-mediated endocytosis of virus by host cell transport establishment of localization vesicle-mediated transport localization symbiont entry into host cell clathrin-dependent endocytosis symbiont entry into host clathrin-dependent endocytosis of virus by host cell receptor-mediated endocytosis endocytosis endocytosis involved in viral entry into host cell	cellular anatomical structure membrane virion component virion membrane viral membrane viral envelope host cell plasma membrane host cellular component host cell part host cell membrane other organism part

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C, E, G, I A, C, E, G, I, K, M, O, Q, S, U, W	IPR001364	Haemagglutinin, influenzavirus A/B	Family
A, C, E, G, I A, C, E, G, I, K, M, O, Q, S, U, W	IPR008980	Viral capsid/haemagglutinin protein	Homologous Superfamily
A, C, E, G, I A, C, E, G, I, K, M, O, Q, S, U, W	IPR000149	Haemagglutinin, influenzavirus A	Family
A, C, E, G, I A, C, E, G, I, K, M, O, Q, S, U, W	IPR013828	Haemagglutinin, HA1 chain, alpha/beta domain superfamily	Homologous Superfamily
B, D, F, H, J B, D, F, H, J, L, N, P, R, T, V, X	IPR001364	Haemagglutinin, influenzavirus A/B	Family
B, D, F, H, J B, D, F, H, J, L, N, P, R, T, V, X	IPR008980	Viral capsid/haemagglutinin protein	Homologous Superfamily
B, D, F, H, J B, D, F, H, J, L, N, P, R, T, V, X	IPR000149	Haemagglutinin, influenzavirus A	Family
B, D, F, H, J B, D, F, H, J, L, N, P, R, T, V, X	IPR013828	Haemagglutinin, HA1 chain, alpha/beta domain superfamily	Homologous Superfamily

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
AA [auth c], CA [auth e], EA [auth g], GA [auth i], IA [auth k], AA [auth c], CA [auth e], EA [auth g], GA [auth i], IA [auth k], KA [auth m], MA [auth o], OA [auth q], QA [auth s], SA [auth u], UA [auth w], Y [auth a]	PCA	Parent Component: GLN : AA0031 : 2-pyrrolidone-5-carboxylic acid (Gln) MOD:00040 , 2-pyrrolidone-5-carboxylic acid (Glu) MOD:00420