Annotations: 8JKH

CryoEM structure of sNS1 complexed with Fab 4B8

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
L [auth N]	DNA_topoisoIV	e8jkhN1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
J [auth n]	DNA_topoisoIV	e8jkhn1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
F [auth L]	DNA_topoisoIV	e8jkhL1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
D [auth l]		e8jkhl01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F:	ECOD (v294.2)
K [auth M]	DNA_topoisoIV	e8jkhM1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
I [auth m]	DNA_topoisoIV	e8jkhm1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
E [auth H]	DNA_topoisoIV	e8jkhH1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
C [auth h]		e8jkhh01	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F:	ECOD (v294.2)
A	DNA_topoisoIV	e8jkhA1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
B [auth a]	DNA_topoisoIV	e8jkha1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
G [auth B]	DNA_topoisoIV	e8jkhB1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)
H [auth b]	DNA_topoisoIV	e8jkhb1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: DNA_topoisoIV	ECOD (v294.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth l], F [auth L], J [auth n], L [auth N]	Light Chain	IGKV1	Kappa	ns1	SAbDab (2026-06-12)
C [auth h], E [auth H], I [auth m], K [auth M]	Heavy Chain	IGHV3	-	ns1	SAbDab (2026-06-12)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D [auth l], F [auth L], J [auth n], L [auth N]	the light chain of antibody 4B8	-	-	-
C [auth h], E [auth H], I [auth m], K [auth M]	the heavy chain of antibody 4B8	-	-	-
A, B [auth a], G [auth B], H [auth b]	NS1	RNA methyltransferase activity O-methyltransferase activity methyltransferase cap1 activity catalytic activity, acting on RNA transferase activity, transferring one-carbon groups catalytic activity, acting on a nucleic acid transferase activity methyltransferase activity catalytic activity RNA binding double-stranded RNA binding binding nucleic acid binding RNA-directed RNA polymerase activity RNA methyltransferase activity O-methyltransferase activity methyltransferase cap1 activity catalytic activity, acting on RNA transferase activity, transferring one-carbon groups catalytic activity, acting on a nucleic acid transferase activity methyltransferase activity catalytic activity RNA binding double-stranded RNA binding binding nucleic acid binding RNA-directed RNA polymerase activity 5'-3' RNA polymerase activity RNA polymerase activity nucleotidyltransferase activity transferase activity, transferring phosphorus-containing groups peptidase activity catalytic activity, acting on a protein serine hydrolase activity serine-type peptidase activity hydrolase activity serine-type endopeptidase activity endopeptidase activity adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding pyrophosphatase activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity, acting on acid anhydrides molecular adaptor activity nucleic acid conformation isomerase activity isomerase activity helicase activity RNA helicase activity ATP-dependent activity, acting on RNA macromolecular conformation isomerase activity ATP-dependent activity protein binding protein dimerization activity cation binding metal ion binding S-adenosylmethionine-dependent methyltransferase activity mRNA 5'-cap (guanine-N7-)-methyltransferase activity N-methyltransferase activity mRNA methyltransferase activity guanyl nucleotide binding GTP binding guanyl ribonucleotide binding lipid binding structural molecule activity	RNA metabolic process viral life cycle primary metabolic process nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process nucleic acid biosynthetic process viral genome replication biosynthetic process viral RNA genome replication viral process metabolic process RNA metabolic process viral life cycle primary metabolic process nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process nucleic acid biosynthetic process viral genome replication biosynthetic process viral RNA genome replication viral process metabolic process cellular process macromolecule metabolic process biological process involved in interspecies interaction between organisms symbiont entry into host cell symbiont entry into host biological process involved in interaction with host biological process involved in symbiotic interaction symbiont-mediated perturbation of host cellular process symbiont-mediated perturbation of host process symbiont-mediated perturbation of host autophagy modulation of process of another organism symbiont-mediated activation of host autophagy symbiont-mediated perturbation of host defense response symbiont-mediated suppression of host immune response symbiont-mediated suppression of host innate immune response symbiont-mediated perturbation of host immune response symbiont-mediated perturbation of host innate immune response symbiont-mediated suppression of host signal transduction pathway symbiont-mediated suppression of host interferon-mediated signaling pathway symbiont-mediated suppression of host type I interferon-mediated signaling pathway symbiont-mediated perturbation of host signal transduction pathway fusion of virus membrane with host endosome membrane membrane fusion involved in viral entry into host cell symbiont-mediated suppression of host JAK-STAT cascade symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT2 activity symbiont-mediated suppression of host JAK-STAT cascade via inhibition of STAT activity virion attachment to host cell adhesion of symbiont to host cell adhesion of symbiont to host proteolysis protein metabolic process	host intracellular membrane-bounded organelle host cellular component host intracellular part host cell endoplasmic reticulum host cell membrane other organism part host cell cytoplasm part host intracellular organelle cellular anatomical structure host cell cytoplasm host cell part host cell endomembrane system host intracellular region host cell endoplasmic reticulum membrane host intracellular membrane-bounded organelle host cellular component host intracellular part host cell endoplasmic reticulum host cell membrane other organism part host cell cytoplasm part host intracellular organelle cellular anatomical structure host cell cytoplasm host cell part host cell endomembrane system host intracellular region host cell endoplasmic reticulum membrane viral capsid virion component host cell perinuclear region of cytoplasm virion membrane extracellular region host cell nucleus

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B [auth a], G [auth B], H [auth b]	IPR000208	RNA-directed RNA polymerase, fingers/palm subdomains, flavivirus	Domain
A, B [auth a], G [auth B], H [auth b]	IPR014756	Immunoglobulin E-set	Homologous Superfamily
A, B [auth a], G [auth B], H [auth b]	IPR001122	Capsid protein C, flavivirus	Domain
A, B [auth a], G [auth B], H [auth b]	IPR027287	Glycoprotein E, immunoglobulin-like domain, flavivirus	Domain
A, B [auth a], G [auth B], H [auth b]	IPR014412	Genome polyprotein, Flavivirus	Family
A, B [auth a], G [auth B], H [auth b]	IPR036253	Flavivirus glycoprotein, central and dimerisation domain superfamily	Homologous Superfamily
A, B [auth a], G [auth B], H [auth b]	IPR011492	Non-structural protein NS3-like, DEAD-box helicase, flavivirus	Domain
A, B [auth a], G [auth B], H [auth b]	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A, B [auth a], G [auth B], H [auth b]	IPR026490	mRNA cap 0/1 methyltransferase	Domain
A, B [auth a], G [auth B], H [auth b]	IPR009003	Peptidase S1, PA clan	Homologous Superfamily
A, B [auth a], G [auth B], H [auth b]	IPR001650	Helicase, C-terminal domain-like	Domain
A, B [auth a], G [auth B], H [auth b]	IPR014001	Helicase superfamily 1/2, ATP-binding domain	Domain
A, B [auth a], G [auth B], H [auth b]	IPR013755	Flaviviral glycoprotein E, central domain, subdomain 1	Homologous Superfamily
A, B [auth a], G [auth B], H [auth b]	IPR000752	Flavivirus non-structural protein NS2A	Domain
A, B [auth a], G [auth B], H [auth b]	IPR047530	RNA-dependent RNA polymerase, flavivirus	Domain
A, B [auth a], G [auth B], H [auth b]	IPR049486	Flavivridae NS3 helicase, C-terminal helical domain	Domain
A, B [auth a], G [auth B], H [auth b]	IPR046811	RNA-directed RNA polymerase, thumb subdomain, flavivirus	Domain
A, B [auth a], G [auth B], H [auth b]	IPR038055	Flaviviral glycoprotein E, dimerisation domain	Homologous Superfamily
A, B [auth a], G [auth B], H [auth b]	IPR002877	Ribosomal RNA methyltransferase, FtsJ domain	Domain
A, B [auth a], G [auth B], H [auth b]	IPR038302	Envelope glycoprotein M superfamily, flavivirus	Homologous Superfamily
A, B [auth a], G [auth B], H [auth b]	IPR000069	Envelope glycoprotein M, flavivirus	Domain
A, B [auth a], G [auth B], H [auth b]	IPR038345	Flavivirus envelope glycoprotein E, Stem/Anchor domain superfamily	Homologous Superfamily
A, B [auth a], G [auth B], H [auth b]	IPR038688	Flavivirus polyprotein propeptide superfamily	Homologous Superfamily
A, B [auth a], G [auth B], H [auth b]	IPR029063	S-adenosyl-L-methionine-dependent methyltransferase superfamily	Homologous Superfamily
A, B [auth a], G [auth B], H [auth b]	IPR026470	Flavivirus envelope glycoprotein E, Stem/Anchor domain	Domain
A, B [auth a], G [auth B], H [auth b]	IPR011998	Envelope glycoprotein E, central and dimerisation domain, flavivirus	Domain
A, B [auth a], G [auth B], H [auth b]	IPR043502	DNA/RNA polymerase superfamily	Homologous Superfamily
A, B [auth a], G [auth B], H [auth b]	IPR037172	Flavivirus capsid protein C superfamily	Homologous Superfamily
A, B [auth a], G [auth B], H [auth b]	IPR000404	Flavivirus non-structural protein NS4A	Domain
A, B [auth a], G [auth B], H [auth b]	IPR000487	Non-structural protein NS2B, flavivirus	Domain
A, B [auth a], G [auth B], H [auth b]	IPR001528	Flavivirus non-structural protein NS4B	Domain
A, B [auth a], G [auth B], H [auth b]	IPR001157	Non-structural protein NS1, flavivirus	Domain
A, B [auth a], G [auth B], H [auth b]	IPR013756	Flaviviral glycoprotein E, central domain, subdomain 2	Homologous Superfamily
A, B [auth a], G [auth B], H [auth b]	IPR001850	Non-structural protein NS3, peptidase S7, flavivirus	Domain
A, B [auth a], G [auth B], H [auth b]	IPR000336	Flavivirus/Alphavirus glycoprotein, immunoglobulin-like domain superfamily	Homologous Superfamily
A, B [auth a], G [auth B], H [auth b]	IPR002535	Flavivirus polyprotein propeptide	Domain
A, B [auth a], G [auth B], H [auth b]	IPR007094	RNA-directed RNA polymerase, catalytic domain	Domain

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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.

8JKH | pdb_00008jkh

CryoEM structure of sNS1 complexed with Fab 4B8

External Resource: Annotation

Domain Annotation: ECOD Classification ECOD Database Homepage

SAbDab Antibody Annotation SAbDab Database Homepage

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

InterPro: Protein Family Classification InterPro Database Homepage