Annotations: 7NBB

Branched Lys48- and Lys63-linked tri-ubiquitin (K48-K63-Ub3) in complex with synthetic nanobody NbSL3

External Resource: Annotation

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

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
G	SCOP2B Superfamily	Ubiquitin-like	8101457	3000157	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Ubiquitin-like	8101457	3000157	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Ubiquitin-like	8101457	3000157	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Ubiquitin-like	8101457	3000157	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Ubiquitin-like	8101457	3000157	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Ubiquitin-like	8101457	3000157	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)
H	EFG_III	e7nbbH1	A: beta barrels	X: Nuclear receptor ligand-binding domain	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: EFG_III	ECOD (v294.2)
D	EFG_III	e7nbbD1	A: beta barrels	X: Nuclear receptor ligand-binding domain	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: EFG_III	ECOD (v294.2)
G	EFG_III	e7nbbG1	A: beta barrels	X: Nuclear receptor ligand-binding domain	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: EFG_III	ECOD (v294.2)
F	EFG_III	e7nbbF1	A: beta barrels	X: Nuclear receptor ligand-binding domain	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: EFG_III	ECOD (v294.2)
C	EFG_III	e7nbbC1	A: beta barrels	X: Nuclear receptor ligand-binding domain	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: EFG_III	ECOD (v294.2)
B	EFG_III	e7nbbB1	A: beta barrels	X: Nuclear receptor ligand-binding domain	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: EFG_III	ECOD (v294.2)
E	EFG_III	e7nbbE1	A: beta barrels	X: Nuclear receptor ligand-binding domain	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: EFG_III	ECOD (v294.2)
A	EFG_III	e7nbbA1	A: beta barrels	X: Nuclear receptor ligand-binding domain	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: EFG_III	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
H	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
D	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (utative)
G	3.10.20.90	Alpha Beta	Roll	Ubiquitin-like (UB roll)	Phosphatidylinositol 3-kinase Catalytic Subunit	CATH (utative)
F	3.10.20.90	Alpha Beta	Roll	Ubiquitin-like (UB roll)	Phosphatidylinositol 3-kinase Catalytic Subunit	CATH (utative)
C	3.10.20.90	Alpha Beta	Roll	Ubiquitin-like (UB roll)	Phosphatidylinositol 3-kinase Catalytic Subunit	CATH (utative)
B	3.10.20.90	Alpha Beta	Roll	Ubiquitin-like (UB roll)	Phosphatidylinositol 3-kinase Catalytic Subunit	CATH (utative)
E	3.10.20.90	Alpha Beta	Roll	Ubiquitin-like (UB roll)	Phosphatidylinositol 3-kinase Catalytic Subunit	CATH (utative)
A	3.10.20.90	Alpha Beta	Roll	Ubiquitin-like (UB roll)	Phosphatidylinositol 3-kinase Catalytic Subunit	CATH (utative)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D, H	Heavy Chain	IGHV1	-	polyubiquitin-b \| polyubiquitin-b \| polyubiquitin-b	SAbDab (2026-05-08)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B, C, F, G	PF00240	Ubiquitin family (ubiquitin)	Ubiquitin family	This family contains a number of ubiquitin-like proteins: SUMO (smt3 homologue) (see Swiss:Q02724), Nedd8 (see Swiss:P29595), Elongin B (see Swiss:Q15370), Rub1 (see Swiss:Q9SHE7), and Parkin (see Swiss:O60260). A number of them are thought to carry ...	This family contains a number of ubiquitin-like proteins: SUMO (smt3 homologue) (see Swiss:Q02724), Nedd8 (see Swiss:P29595), Elongin B (see Swiss:Q15370), Rub1 (see Swiss:Q9SHE7), and Parkin (see Swiss:O60260). A number of them are thought to carry a distinctive five-residue motif termed the proteasome-interacting motif (PIM), which may have a biologically significant role in protein delivery to proteasomes and recruitment of proteasomes to transcription sites [5].	Domain
A, E	PF00240	Ubiquitin family (ubiquitin)	Ubiquitin family	This family contains a number of ubiquitin-like proteins: SUMO (smt3 homologue) (see Swiss:Q02724), Nedd8 (see Swiss:P29595), Elongin B (see Swiss:Q15370), Rub1 (see Swiss:Q9SHE7), and Parkin (see Swiss:O60260). A number of them are thought to carry ...	This family contains a number of ubiquitin-like proteins: SUMO (smt3 homologue) (see Swiss:Q02724), Nedd8 (see Swiss:P29595), Elongin B (see Swiss:Q15370), Rub1 (see Swiss:Q9SHE7), and Parkin (see Swiss:O60260). A number of them are thought to carry a distinctive five-residue motif termed the proteasome-interacting motif (PIM), which may have a biologically significant role in protein delivery to proteasomes and recruitment of proteasomes to transcription sites [5].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D, H	Synthetic nanobody NbSL3	-	-	-
B, C, F, G	Polyubiquitin-B	vitamin binding vitamin B6 binding pyridoxal phosphate binding ion binding binding anion binding heterocyclic compound binding small molecule binding protein tag activity molecular tag activity ubiquitin protein ligase binding protein binding ubiquitin-like protein ligase binding enzyme binding	developmental process multicellular organismal process reproductive system development gonad development tube development reproductive process sex differentiation animal organ development developmental process involved in reproduction male gonad development male sex differentiation multicellular organism development development of primary male sexual characteristics development of primary sexual characteristics seminiferous tubule development developmental process multicellular organismal process reproductive system development gonad development tube development reproductive process sex differentiation animal organ development developmental process involved in reproduction male gonad development male sex differentiation multicellular organism development development of primary male sexual characteristics development of primary sexual characteristics seminiferous tubule development anatomical structure development reproductive structure development system development regulation of mitochondrial membrane potential biological regulation regulation of biological quality regulation of membrane potential protein-containing complex organization protein homotetramerization cellular component organization cellular component biogenesis cellular component assembly protein complex oligomerization protein tetramerization protein-containing complex assembly protein homooligomerization cellular process cellular component organization or biogenesis catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process metabolic process primary metabolic process protein catabolic process protein metabolic process macromolecule metabolic process macromolecule catabolic process regulation of biological process neuron apoptotic process regulation of cellular process regulation of apoptotic process regulation of programmed cell death cell death apoptotic process programmed cell death regulation of neuron apoptotic process multicellular organismal-level homeostasis homeostatic process energy homeostasis regulation of protein modification process positive regulation of protein metabolic process positive regulation of biological process regulation of protein ubiquitination positive regulation of post-translational protein modification regulation of primary metabolic process positive regulation of metabolic process positive regulation of protein modification process protein ubiquitination positive regulation of macromolecule metabolic process regulation of protein modification by small protein conjugation or removal protein modification process positive regulation of cellular process positive regulation of protein modification by small protein conjugation or removal positive regulation of protein ubiquitination regulation of post-translational protein modification regulation of protein metabolic process regulation of macromolecule metabolic process macromolecule modification post-translational protein modification regulation of metabolic process protein modification by small protein conjugation protein modification by small protein conjugation or removal cellular response to stimulus positive regulation of cell communication positive regulation of signal transduction response to stimulus signaling positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator regulation of signal transduction regulation of intrinsic apoptotic signaling pathway intracellular signal transduction cell communication positive regulation of apoptotic signaling pathway positive regulation of response to stimulus regulation of intracellular signal transduction regulation of signal transduction by p53 class mediator positive regulation of signal transduction by p53 class mediator signal transduction intrinsic apoptotic signaling pathway regulation of signaling positive regulation of programmed cell death positive regulation of intracellular signal transduction signal transduction by p53 class mediator positive regulation of apoptotic process apoptotic signaling pathway regulation of response to stimulus regulation of cell communication intrinsic apoptotic signaling pathway by p53 class mediator positive regulation of intrinsic apoptotic signaling pathway regulation of intrinsic apoptotic signaling pathway by p53 class mediator regulation of apoptotic signaling pathway positive regulation of signaling cellular developmental process cell projection organization plasma membrane bounded cell projection morphogenesis cell development neuron projection development cell morphogenesis neurogenesis cell projection morphogenesis neuron differentiation neuron projection morphogenesis cell differentiation plasma membrane bounded cell projection organization nervous system development generation of neurons anatomical structure morphogenesis neuron development hypothalamus development forebrain development central nervous system neuron development central nervous system neuron differentiation hypothalamus cell differentiation hypothalamus gonadotrophin-releasing hormone neuron development limbic system development head development forebrain generation of neurons hypothalamus gonadotrophin-releasing hormone neuron differentiation brain development diencephalon development forebrain neuron development central nervous system development forebrain neuron differentiation sexual reproduction organelle fission meiotic cell cycle multicellular organismal reproductive process female gamete generation meiotic cell cycle process gamete generation nuclear division organelle organization meiosis I meiosis I cell cycle process female meiosis I female meiotic nuclear division meiotic nuclear division cell cycle cell cycle process positive regulation of protein monoubiquitination protein monoubiquitination regulation of protein monoubiquitination proteasomal protein catabolic process regulation of catabolic process regulation of proteasomal protein catabolic process regulation of protein catabolic process male meiosis I male meiotic nuclear division male gamete generation connective tissue development adipose tissue development fat pad development tissue development female gonad development female sex differentiation development of primary female sexual characteristics establishment of organelle localization cellular localization organelle transport along microtubule transport establishment of mitochondrion localization intracellular transport establishment of localization localization mitochondrion localization establishment of mitochondrion localization, microtubule-mediated mitochondrion transport along microtubule organelle localization establishment of localization in cell microtubule-based transport transport along microtubule cytoskeleton-dependent intracellular transport microtubule-based movement microtubule-based process	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle vesicle extracellular exosome extracellular vesicle extracellular organelle extracellular region extracellular membrane-bounded organelle membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle vesicle extracellular exosome extracellular vesicle extracellular organelle extracellular region extracellular membrane-bounded organelle cytosol cell periphery plasma membrane membrane nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen organelle subcompartment endomembrane system endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum organelle membrane endoplasmic reticulum membrane cell projection neuron projection plasma membrane bounded cell projection intracellular vesicle cytoplasmic vesicle membrane bounding membrane of organelle cytoplasmic vesicle vesicle membrane endocytic vesicle membrane endocytic vesicle endosome membrane endosome mitochondrial membrane organelle outer membrane organelle envelope mitochondrial envelope mitochondrial outer membrane outer membrane somatodendritic compartment cell body neuronal cell body
A, E	Polyubiquitin-B	vitamin binding vitamin B6 binding pyridoxal phosphate binding ion binding binding anion binding heterocyclic compound binding small molecule binding protein tag activity molecular tag activity ubiquitin protein ligase binding protein binding ubiquitin-like protein ligase binding enzyme binding	developmental process multicellular organismal process reproductive system development gonad development tube development reproductive process sex differentiation animal organ development developmental process involved in reproduction male gonad development male sex differentiation multicellular organism development development of primary male sexual characteristics development of primary sexual characteristics seminiferous tubule development developmental process multicellular organismal process reproductive system development gonad development tube development reproductive process sex differentiation animal organ development developmental process involved in reproduction male gonad development male sex differentiation multicellular organism development development of primary male sexual characteristics development of primary sexual characteristics seminiferous tubule development anatomical structure development reproductive structure development system development regulation of mitochondrial membrane potential biological regulation regulation of biological quality regulation of membrane potential protein-containing complex organization protein homotetramerization cellular component organization cellular component biogenesis cellular component assembly protein complex oligomerization protein tetramerization protein-containing complex assembly protein homooligomerization cellular process cellular component organization or biogenesis catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process metabolic process primary metabolic process protein catabolic process protein metabolic process macromolecule metabolic process macromolecule catabolic process regulation of biological process neuron apoptotic process regulation of cellular process regulation of apoptotic process regulation of programmed cell death cell death apoptotic process programmed cell death regulation of neuron apoptotic process multicellular organismal-level homeostasis homeostatic process energy homeostasis regulation of protein modification process positive regulation of protein metabolic process positive regulation of biological process regulation of protein ubiquitination positive regulation of post-translational protein modification regulation of primary metabolic process positive regulation of metabolic process positive regulation of protein modification process protein ubiquitination positive regulation of macromolecule metabolic process regulation of protein modification by small protein conjugation or removal protein modification process positive regulation of cellular process positive regulation of protein modification by small protein conjugation or removal positive regulation of protein ubiquitination regulation of post-translational protein modification regulation of protein metabolic process regulation of macromolecule metabolic process macromolecule modification post-translational protein modification regulation of metabolic process protein modification by small protein conjugation protein modification by small protein conjugation or removal cellular response to stimulus positive regulation of cell communication positive regulation of signal transduction response to stimulus signaling positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator regulation of signal transduction regulation of intrinsic apoptotic signaling pathway intracellular signal transduction cell communication positive regulation of apoptotic signaling pathway positive regulation of response to stimulus regulation of intracellular signal transduction regulation of signal transduction by p53 class mediator positive regulation of signal transduction by p53 class mediator signal transduction intrinsic apoptotic signaling pathway regulation of signaling positive regulation of programmed cell death positive regulation of intracellular signal transduction signal transduction by p53 class mediator positive regulation of apoptotic process apoptotic signaling pathway regulation of response to stimulus regulation of cell communication intrinsic apoptotic signaling pathway by p53 class mediator positive regulation of intrinsic apoptotic signaling pathway regulation of intrinsic apoptotic signaling pathway by p53 class mediator regulation of apoptotic signaling pathway positive regulation of signaling cellular developmental process cell projection organization plasma membrane bounded cell projection morphogenesis cell development neuron projection development cell morphogenesis neurogenesis cell projection morphogenesis neuron differentiation neuron projection morphogenesis cell differentiation plasma membrane bounded cell projection organization nervous system development generation of neurons anatomical structure morphogenesis neuron development hypothalamus development forebrain development central nervous system neuron development central nervous system neuron differentiation hypothalamus cell differentiation hypothalamus gonadotrophin-releasing hormone neuron development limbic system development head development forebrain generation of neurons hypothalamus gonadotrophin-releasing hormone neuron differentiation brain development diencephalon development forebrain neuron development central nervous system development forebrain neuron differentiation sexual reproduction organelle fission meiotic cell cycle multicellular organismal reproductive process female gamete generation meiotic cell cycle process gamete generation nuclear division organelle organization meiosis I meiosis I cell cycle process female meiosis I female meiotic nuclear division meiotic nuclear division cell cycle cell cycle process positive regulation of protein monoubiquitination protein monoubiquitination regulation of protein monoubiquitination proteasomal protein catabolic process regulation of catabolic process regulation of proteasomal protein catabolic process regulation of protein catabolic process male meiosis I male meiotic nuclear division male gamete generation connective tissue development adipose tissue development fat pad development tissue development female gonad development female sex differentiation development of primary female sexual characteristics establishment of organelle localization cellular localization organelle transport along microtubule transport establishment of mitochondrion localization intracellular transport establishment of localization localization mitochondrion localization establishment of mitochondrion localization, microtubule-mediated mitochondrion transport along microtubule organelle localization establishment of localization in cell microtubule-based transport transport along microtubule cytoskeleton-dependent intracellular transport microtubule-based movement microtubule-based process	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle vesicle extracellular exosome extracellular vesicle extracellular organelle extracellular region extracellular membrane-bounded organelle membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle vesicle extracellular exosome extracellular vesicle extracellular organelle extracellular region extracellular membrane-bounded organelle cytosol cell periphery plasma membrane membrane nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen organelle subcompartment endomembrane system endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum organelle membrane endoplasmic reticulum membrane cell projection neuron projection plasma membrane bounded cell projection intracellular vesicle cytoplasmic vesicle membrane bounding membrane of organelle cytoplasmic vesicle vesicle membrane endocytic vesicle membrane endocytic vesicle endosome membrane endosome mitochondrial membrane organelle outer membrane organelle envelope mitochondrial envelope mitochondrial outer membrane outer membrane somatodendritic compartment cell body neuronal cell body

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B, C, F, G	IPR019954	Ubiquitin conserved site	Conserved Site
B, C, F, G	IPR050158	Ubiquitin and ubiquitin-like	Family
B, C, F, G	IPR000626	Ubiquitin-like domain	Domain
B, C, F, G	IPR019956	Ubiquitin domain	Domain
B, C, F, G	IPR029071	Ubiquitin-like domain superfamily	Homologous Superfamily
A, E	IPR019954	Ubiquitin conserved site	Conserved Site
A, E	IPR050158	Ubiquitin and ubiquitin-like	Family
A, E	IPR000626	Ubiquitin-like domain	Domain
A, E	IPR019956	Ubiquitin domain	Domain
A, E	IPR029071	Ubiquitin-like domain superfamily	Homologous Superfamily

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
B, C, F, G	: P0CG47	astrocytic tumor cleft soft palate lung cancer Cleft of hard palate ovarian cancer isolated cleft palate
A, E	: P0CG47	astrocytic tumor cleft soft palate lung cancer Cleft of hard palate ovarian cancer isolated cleft palate

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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.