Annotations: 4ORZ

HIV-1 Nef protein in complex with single domain antibody sdAb19 and an engineered Hck SH3 domain

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d4orza_	All beta proteins	SH3-like barrel	SH3-domain	automated matches	automated matches	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d4orzb_	Alpha and beta proteins (a+b)	Regulatory factor Nef	Regulatory factor Nef	Regulatory factor Nef	automated matches	HIV-1 (HIV-1 M:B_ARV2/SF2 ) [TaxId: 11685 ],	SCOPe (2.08)
C	d4orzc_	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	V set domains (antibody variable domain-like)	automated matches	(Lama glama ) [TaxId: 9844 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	SH3-domain	8041589	3000153	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	Arylsulfotran_N	e4orzA1	A: beta barrels	X: TIM beta/alpha-barrel	H: gamma-Crystallin-like	T: gamma-Crystallin-like	F: Arylsulfotran_N	ECOD (v294.2)
B	Arylsulfotran_N	e4orzB1	A: beta barrels	X: TIM beta/alpha-barrel	H: gamma-Crystallin-like	T: gamma-Crystallin-like	F: Arylsulfotran_N	ECOD (v294.2)
C	Arylsulfotran_N	e4orzC1	A: beta barrels	X: TIM beta/alpha-barrel	H: gamma-Crystallin-like	T: gamma-Crystallin-like	F: Arylsulfotran_N	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.30.30.40	Mainly Beta	Roll	SH3 type barrels.	SH3 Domains	CATH (4.3.0)
B	3.30.62.10	Alpha Beta	2-Layer Sandwich	Nef Regulatory Factor	Nef Regulatory Factor	CATH (4.3.0)
C	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
C	sdAb19 Llama heavy chain VH domain	VH	Lama glama (llama)	IGHV3S301, IGHJ401	V-DOMAIN VH	IG	(VH)	IMGT (202618-0)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C	Heavy Chain	IGHV1	-	protein nef	SAbDab (2026-05-15)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00018	SH3 domain (SH3_1)	SH3 domain	SH3 (Src homology 3) domains are often indicative of a protein involved in signal transduction related to cytoskeletal organisation. First described in the Src cytoplasmic tyrosine kinase Swiss:P12931. The structure is a partly opened beta barrel.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Tyrosine-protein kinase HCK	phosphoprotein binding phosphotyrosine residue binding protein binding binding protein phosphorylated amino acid binding protein tyrosine kinase activity catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups adenyl ribonucleotide binding phosphoprotein binding phosphotyrosine residue binding protein binding binding protein phosphorylated amino acid binding protein tyrosine kinase activity catalytic activity, acting on a protein kinase activity protein kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups 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 non-membrane spanning protein tyrosine kinase activity signaling receptor binding lipid binding	cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular process cellular response to cytokine stimulus cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation response to cytokine cytokine-mediated signaling pathway cell communication response to peptide response to chemical cellular process cellular response to cytokine stimulus signal transduction developmental process anatomical structure development tissue development mesoderm development regulated exocytosis cellular localization transport secretion export from cell leukocyte degranulation establishment of localization vesicle-mediated transport immune effector process localization secretion by cell exocytosis immune system process establishment of localization in cell regulation of defense response positive regulation of response to biotic stimulus regulation of response to biotic stimulus biological process involved in interspecies interaction between organisms regulation of response to external stimulus positive regulation of biological process response to biotic stimulus positive regulation of response to stimulus immune response-activating signaling pathway positive regulation of response to external stimulus immune response-regulating signaling pathway positive regulation of immune response regulation of response to stress response to stress innate immune response regulation of immune system process response to external biotic stimulus positive regulation of immune system process innate immune response-activating signaling pathway positive regulation of innate immune response defense response immune response response to other organism regulation of innate immune response defense response to symbiont response to external stimulus regulation of response to stimulus defense response to other organism positive regulation of defense response activation of innate immune response regulation of immune response activation of immune response protein phosphorylation protein autophosphorylation phosphorylation primary metabolic process macromolecule modification phosphate-containing compound metabolic process metabolic process protein metabolic process macromolecule metabolic process protein modification process phosphorus metabolic process response to type II interferon cellular response to type II interferon interferon-mediated signaling pathway type II interferon-mediated signaling pathway import into cell regulation of localization regulation of cellular component organization regulation of transport regulation of phagocytosis regulation of vesicle-mediated transport cellular component organization phagocytosis cellular component organization or biogenesis endocytosis regulation of endocytosis respiratory burst respiratory burst involved in defense response respiratory burst after phagocytosis cell adhesion negative regulation of inflammatory response negative regulation of biological process inflammatory response to antigenic stimulus negative regulation of inflammatory response to antigenic stimulus negative regulation of response to stimulus negative regulation of immune response regulation of inflammatory response to antigenic stimulus regulation of inflammatory response negative regulation of immune system process negative regulation of response to external stimulus negative regulation of defense response inflammatory response cellular developmental process cell differentiation negative regulation of programmed cell death regulation of apoptotic process regulation of programmed cell death cell death negative regulation of apoptotic process negative regulation of cellular process apoptotic process programmed cell death regulation of cytoskeleton organization regulation of actin filament-based process actin cytoskeleton organization regulation of organelle organization organelle organization regulation of actin cytoskeleton organization actin filament-based process cytoskeleton organization integrin-mediated signaling pathway response to lipid cellular response to lipopolysaccharide lipopolysaccharide-mediated signaling pathway cellular response to biotic stimulus response to bacterium response to oxygen-containing compound cellular response to molecule of bacterial origin response to lipopolysaccharide cellular response to oxygen-containing compound cellular response to chemical stimulus cellular response to lipid response to molecule of bacterial origin regulation of developmental process regulation of cell shape cell morphogenesis regulation of cell morphogenesis anatomical structure morphogenesis regulation of biological quality regulation of anatomical structure morphogenesis cell population proliferation positive regulation of cell population proliferation regulation of cell population proliferation positive regulation of cellular process peptidyl-tyrosine modification peptidyl-amino acid modification peptidyl-tyrosine phosphorylation positive regulation of organelle organization positive regulation of cellular component organization regulation of cellular component size cellular component biogenesis regulation of protein-containing complex assembly positive regulation of protein-containing complex assembly cellular component assembly positive regulation of protein polymerization protein-containing complex assembly regulation of actin filament polymerization protein polymerization actin polymerization or depolymerization regulation of actin filament organization actin filament polymerization protein-containing complex organization positive regulation of cellular component biogenesis positive regulation of cytoskeleton organization regulation of actin polymerization or depolymerization actin filament organization regulation of cellular component biogenesis positive regulation of supramolecular fiber organization regulation of protein polymerization regulation of actin filament length regulation of supramolecular fiber organization supramolecular fiber organization positive regulation of actin filament polymerization regulation of anatomical structure size cell surface receptor protein tyrosine kinase signaling pathway enzyme-linked receptor protein signaling pathway leukocyte migration cell migration cell motility leukocyte migration involved in immune response organelle assembly podosome assembly membraneless organelle assembly regulation of podosome assembly regulation of organelle assembly intracellular signal transduction immune response-regulating cell surface receptor signaling pathway Fc-gamma receptor signaling pathway involved in phagocytosis Fc receptor signaling pathway Fc-gamma receptor signaling pathway immune response-activating cell surface receptor signaling pathway Fc receptor mediated stimulatory signaling pathway defense response to Gram-positive bacterium defense response to bacterium	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle intracellular organelle Golgi apparatus organelle intracellular membrane-bounded organelle endomembrane system cytoskeleton membraneless organelle intracellular membraneless organelle anchoring junction cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle intracellular organelle Golgi apparatus organelle intracellular membrane-bounded organelle endomembrane system cytoskeleton membraneless organelle intracellular membraneless organelle anchoring junction cell junction focal adhesion cell-substrate junction membrane microdomain cell periphery membrane raft plasma membrane raft membrane plasma membrane plasma membrane region caveola transport vesicle intracellular vesicle cytoplasmic vesicle vesicle lytic vacuole vacuole lysosome cytoplasmic side of plasma membrane cytoplasmic side of membrane side of membrane cell projection nucleus
B	Protein Nef	SH3 domain binding protein binding binding protein domain specific binding guanyl nucleotide binding GTP binding nucleotide binding guanyl ribonucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding SH3 domain binding protein binding binding protein domain specific binding guanyl nucleotide binding GTP binding nucleotide binding guanyl ribonucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding	symbiont-mediated perturbation of host defense response biological process involved in interspecies interaction between organisms symbiont-mediated perturbation of host immune response biological process involved in interaction with host biological process involved in symbiotic interaction symbiont-mediated suppression of host immune response symbiont-mediated perturbation of host process symbiont-mediated suppression of host antigen processing and presentation of peptide antigen via MHC class I symbiont-mediated suppression of host antigen processing and presentation modulation of process of another organism symbiont-mediated suppression of host adaptive immune response symbiont entry into host cell viral process symbiont entry into host symbiont-mediated perturbation of host defense response biological process involved in interspecies interaction between organisms symbiont-mediated perturbation of host immune response biological process involved in interaction with host biological process involved in symbiotic interaction symbiont-mediated suppression of host immune response symbiont-mediated perturbation of host process symbiont-mediated suppression of host antigen processing and presentation of peptide antigen via MHC class I symbiont-mediated suppression of host antigen processing and presentation modulation of process of another organism symbiont-mediated suppression of host adaptive immune response symbiont entry into host cell viral process symbiont entry into host viral life cycle endocytosis involved in viral entry into host cell symbiont-mediated suppression of host antigen processing and presentation of peptide antigen via MHC class II 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 symbiont-mediated perturbation of host cellular process symbiont-mediated suppression of host autophagy symbiont-mediated perturbation of host autophagy	cellular anatomical structure membrane extracellular region virion component host cell plasma membrane host cellular component host cell part host cell membrane other organism part host intracellular part host cell Golgi membrane host cell Golgi apparatus host cell cytoplasm part host cell cytoplasm cellular anatomical structure membrane extracellular region virion component host cell plasma membrane host cellular component host cell part host cell membrane other organism part host intracellular part host cell Golgi membrane host cell Golgi apparatus host cell cytoplasm part host cell cytoplasm host cell endomembrane system host intracellular region
C	single domain antibody sdAb19	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR008266	Tyrosine-protein kinase, active site	Active Site
A	IPR020635	Tyrosine-protein kinase, catalytic domain	Domain
A	IPR036028	SH3-like domain superfamily	Homologous Superfamily
A	IPR000719	Protein kinase domain	Domain
A	IPR001452	SH3 domain	Domain
A	IPR017441	Protein kinase, ATP binding site	Binding Site
A	IPR036860	SH2 domain superfamily	Homologous Superfamily
A	IPR000980	SH2 domain	Domain
A	IPR001245	Serine-threonine/tyrosine-protein kinase, catalytic domain	Domain
A	IPR035851	Tyrosine-protein kinase HCK, SH2 domain	Domain
A	IPR011009	Protein kinase-like domain superfamily	Homologous Superfamily
A	IPR050198	Non-receptor tyrosine kinases involved in cell signaling	Family
B	IPR001558	HIV negative factor Nef	Family
B	IPR027480	HIV-1 Nef protein, anchor domain superfamily	Homologous Superfamily
B	IPR027481	HIV-1 Nef protein, core domain superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	: P08631	Liver Cirrhosis, Experimental osteosarcoma pancreatic intraductal papillary-mucinous carcinoma tuberculosis adrenal cortex carcinoma cancer chronic obstructive pulmonary disease glioblastoma interstitial cystitis nephrosclerosis ovarian cancer pancreatic intraductal papillary-mucinous neoplasm ulcerative colitis B-cell chronic lymphocytic leukemia childhood acute lymphoblastic leukemia Liver Cirrhosis, Experimental osteosarcoma pancreatic intraductal papillary-mucinous carcinoma tuberculosis adrenal cortex carcinoma cancer chronic obstructive pulmonary disease glioblastoma interstitial cystitis nephrosclerosis ovarian cancer pancreatic intraductal papillary-mucinous neoplasm ulcerative colitis B-cell chronic lymphocytic leukemia childhood acute lymphoblastic leukemia cutaneous lupus erythematosus head and neck cancer invasive ductal breast carcinoma lung carcinoma non-small cell lung carcinoma ovarian mucinous adenocarcinoma pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia subependymal giant cell astrocytoma gastric carcinoma inflammatory bowel disease MALT lymphoma

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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.