Annotations: 1LDJ

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1ldja1	All alpha proteins	DNA/RNA-binding 3-helical bundle	'Winged helix' DNA-binding domain	SCF ubiquitin ligase complex WHB domain	Anaphase promoting complex (APC)	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d1ldja2	All alpha proteins	alpha-alpha superhelix	Cullin repeat-like	Cullin repeat	Cullin homolog 1, Cul-1	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
A	d1ldja3	Multi-domain proteins (alpha and beta)	Cullin homology domain	Cullin homology domain	Cullin homology domain	Cullin homolog 1, cul-1	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1ldjb_	Small proteins	RING/U-box	RING/U-box	RING finger domain, C3HC4	RIGG-box protein 1 (RBX1) of SCF ubiquitin ligase complex	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Cullin homology region-like	8003454	4000271	SCOP2 (2022-06-29)
A	SCOP2 Family	SCF complex WHB domain-like	8003462	4000322	SCOP2 (2022-06-29)
A	SCOP2 Family	Cullin repeat	8091643	4002001	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Winged helix DNA-binding domain	8003455	3000034	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Winged helix DNA-binding domain	8003463	3000034	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Cullin repeat-like	8003460	3000059	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	RING/U-box like	8040866	3000160	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	Cullin_Nedd8	e1ldjA1	A: alpha arrays	X: HTH	H: HTH	T: winged	F: Cullin_Nedd8	ECOD (1.6)
A	Cullin_4th	e1ldjA2	A: alpha arrays	X: HTH	H: HTH	T: winged	F: Cullin_4th	ECOD (1.6)
A	Cullin_1st	e1ldjA3	A: alpha superhelices	X: Repetitive alpha hairpins	H: ARM repeat (From Topology)	T: ARM repeat	F: Cullin_1st	ECOD (1.6)
A	Cullin_2nd	e1ldjA4	A: alpha superhelices	X: Repetitive alpha hairpins	H: ARM repeat (From Topology)	T: ARM repeat	F: Cullin_2nd	ECOD (1.6)
A	Cullin_3rd	e1ldjA5	A: a+b duplicates or obligate multimers	X: a+b domain in cullin-like proteins (From Topology)	H: a+b domain in cullin-like proteins (From Topology)	T: a+b domain in cullin-like proteins	F: Cullin_3rd	ECOD (1.6)
B	zf-rbx1	e1ldjB1	A: few secondary structure elements	X: RING/U-box-like	H: RING/U-box-like	T: RING/U-box	F: zf-rbx1	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.1310.10	Mainly Alpha	Up-down Bundle	5 helical Cullin repeat like	Cullin Repeats	CATH (4.3.0)
A	4.10.1030.10	Few Secondary Structures	Irregular	Ring Box Chain A	domain 5	CATH (4.3.0)
A	1.10.10.10	Mainly Alpha	Orthogonal Bundle	Arc Repressor Mutant, subunit A	Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain	CATH (4.3.0)
B	3.30.40.10	Alpha Beta	2-Layer Sandwich	Herpes Virus-1	Zinc/RING finger domain, C3HC4 (zinc finger)	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00888	Cullin family (Cullin)	Cullin family	-	Repeat
A	PF10557	Cullin protein neddylation domain (Cullin_Nedd8)	Cullin protein neddylation domain	This is the neddylation site of cullin proteins which are a family of structurally related proteins containing an evolutionarily conserved cullin domain. With the exception of APC2, each member of the cullin family is modified by Nedd8 and several cu ...	This is the neddylation site of cullin proteins which are a family of structurally related proteins containing an evolutionarily conserved cullin domain. With the exception of APC2, each member of the cullin family is modified by Nedd8 and several cullins function in Ubiquitin-dependent proteolysis, a process in which the 26S proteasome recognises and subsequently degrades a target protein tagged with K48-linked poly-ubiquitin chains. Cullins are molecular scaffolds responsible for assembling the ROC1/Rbx1 RING-based E3 ubiquitin ligases, of which several play a direct role in tumorigenesis. Nedd8/Rub1 is a small ubiquitin-like protein, which was originally found to be conjugated to Cdc53, a cullin component of the SCF (Skp1-Cdc53/CUL1-F-box protein) E3 Ub ligase complex in Saccharomyces cerevisiae, and Nedd8 modification has now emerged as a regulatory pathway of fundamental importance for cell cycle control and for embryogenesis in metazoans. The only identified Nedd8 substrates are cullins. Neddylation results in covalent conjugation of a Nedd8 moiety onto a conserved cullin lysine residue [1].	Domain
B	PF12678	RING-H2 zinc finger domain (zf-rbx1)	RING-H2 zinc finger domain	There are 8 cysteine/ histidine residues which are proposed to be the conserved residues involved in zinc binding. The protein, of which this domain is the conserved region, participates in diverse functions relevant to chromosome metabolism and cell ...	There are 8 cysteine/ histidine residues which are proposed to be the conserved residues involved in zinc binding. The protein, of which this domain is the conserved region, participates in diverse functions relevant to chromosome metabolism and cell cycle control [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Cullin homolog 1	ubiquitin ligase complex scaffold activity protein-macromolecule adaptor activity molecular adaptor activity ubiquitin protein ligase binding protein binding binding ubiquitin-like protein ligase binding enzyme binding	cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction positive regulation of canonical NF-kappaB signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus regulation of intracellular signal transduction intracellular signaling cassette cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction positive regulation of canonical NF-kappaB signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus regulation of intracellular signal transduction intracellular signaling cassette signal transduction positive regulation of cellular process regulation of biological process regulation of signaling biological regulation positive regulation of intracellular signal transduction canonical NF-kappaB signal transduction regulation of response to stimulus regulation of cell communication regulation of canonical NF-kappaB signal transduction cellular process positive regulation of signaling developmental process anatomical structure morphogenesis anatomical structure development animal organ development animal organ morphogenesis cell death apoptotic signaling pathway apoptotic process intrinsic apoptotic signaling pathway programmed cell death cell population proliferation primary metabolic process protein ubiquitination macromolecule modification metabolic process protein metabolic process macromolecule metabolic process post-translational protein modification protein modification process protein modification by small protein conjugation protein modification by small protein conjugation or removal catabolic process proteolysis involved in protein catabolic process proteasomal protein catabolic process protein catabolic process proteasome-mediated ubiquitin-dependent protein catabolic process macromolecule catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process proteolysis SCF-dependent proteasomal ubiquitin-dependent protein catabolic process ubiquitin-dependent protein catabolic process protein polyubiquitination protein K48-linked ubiquitination mitotic cell cycle process cell cycle phase transition cell cycle G1/S transition of mitotic cell cycle cell cycle G1/S phase transition mitotic cell cycle mitotic cell cycle phase transition cell cycle process protein monoubiquitination	cullin-RING ubiquitin ligase complex protein-containing complex ubiquitin ligase complex catalytic complex transferase complex intracellular protein-containing complex cellular anatomical structure intracellular anatomical structure cytoplasm cytosol cell periphery plasma membrane membrane Parkin-FBXW7-Cul1 ubiquitin ligase complex cullin-RING ubiquitin ligase complex protein-containing complex ubiquitin ligase complex catalytic complex transferase complex intracellular protein-containing complex cellular anatomical structure intracellular anatomical structure cytoplasm cytosol cell periphery plasma membrane membrane Parkin-FBXW7-Cul1 ubiquitin ligase complex membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen SCF ubiquitin ligase complex
B	ring-box protein 1	aminoacyltransferase activity ubiquitin-like protein transferase activity catalytic activity, acting on a protein acyltransferase activity ubiquitin-ubiquitin ligase activity ubiquitin-like protein ligase activity ubiquitin protein ligase activity transferase activity catalytic activity ubiquitin-protein transferase activity molecular adaptor activity ubiquitin protein ligase binding protein binding binding aminoacyltransferase activity ubiquitin-like protein transferase activity catalytic activity, acting on a protein acyltransferase activity ubiquitin-ubiquitin ligase activity ubiquitin-like protein ligase activity ubiquitin protein ligase activity transferase activity catalytic activity ubiquitin-protein transferase activity molecular adaptor activity ubiquitin protein ligase binding protein binding binding ubiquitin-like protein ligase binding enzyme binding cullin family protein binding transcription factor binding RNA polymerase II-specific DNA-binding transcription factor binding DNA-binding transcription factor binding NEDD8 transferase activity NEDD8 ligase activity cation binding transition metal ion binding zinc ion binding ion binding metal ion binding small molecule binding	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process multicellular organismal process regulation of cellular process negative regulation of biological process negative regulation of type I interferon production cytokine production negative regulation of cellular process regulation of cytokine production regulation of multicellular organismal process cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process multicellular organismal process regulation of cellular process negative regulation of biological process negative regulation of type I interferon production cytokine production negative regulation of cellular process regulation of cytokine production regulation of multicellular organismal process negative regulation of macromolecule metabolic process regulation of biosynthetic process regulation of biological process type I interferon production negative regulation of metabolic process biological regulation negative regulation of cytokine production regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process regulation of gene expression negative regulation of gene expression biosynthetic process negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process metabolic process regulation of macromolecule biosynthetic process macromolecule metabolic process negative regulation of multicellular organismal process regulation of metabolic process regulation of type I interferon production developmental process spermatogenesis sexual reproduction reproductive process multicellular organismal reproductive process developmental process involved in reproduction male gamete generation gamete generation signaling negative regulation of signaling regulation of canonical Wnt signaling pathway canonical Wnt signaling pathway regulation of signal transduction negative regulation of cell communication cell communication negative regulation of Wnt signaling pathway signal transduction Wnt signaling pathway regulation of signaling cell surface receptor signaling pathway regulation of Wnt signaling pathway negative regulation of response to stimulus negative regulation of signal transduction negative regulation of canonical Wnt signaling pathway regulation of response to stimulus regulation of cell communication positive regulation of proteasomal protein catabolic process catabolic process positive regulation of protein metabolic process proteolysis involved in protein catabolic process positive regulation of biological process proteasome-mediated ubiquitin-dependent protein catabolic process macromolecule catabolic process regulation of ubiquitin-dependent protein catabolic process regulation of primary metabolic process positive regulation of metabolic process positive regulation of ubiquitin-dependent protein catabolic process regulation of proteolysis regulation of proteolysis involved in protein catabolic process modification-dependent macromolecule catabolic process proteolysis positive regulation of macromolecule metabolic process protein metabolic process positive regulation of cellular process regulation of protein metabolic process primary metabolic process proteasomal protein catabolic process protein catabolic process regulation of catabolic process positive regulation of protein catabolic process positive regulation of proteolysis involved in protein catabolic process positive regulation of catabolic process regulation of proteasomal ubiquitin-dependent protein catabolic process modification-dependent protein catabolic process positive regulation of proteolysis regulation of proteasomal protein catabolic process positive regulation of proteasomal ubiquitin-dependent protein catabolic process ubiquitin-dependent protein catabolic process regulation of protein catabolic process protein ubiquitination macromolecule modification post-translational protein modification protein modification process protein modification by small protein conjugation protein modification by small protein conjugation or removal response to oxidative stress regulation of response to stress regulation of response to oxidative stress negative regulation of response to oxidative stress cellular response to chemical stimulus response to chemical cellular response to oxidative stress cellular response to chemical stress intracellular signal transduction intracellular signaling cassette MAPK cascade protein polyubiquitination ubiquitin-dependent protein catabolic process via the C-end degron rule pathway cellular response to acid chemical cellular response to amino acid stimulus response to acid chemical response to amino acid DNA metabolic process nucleic acid metabolic process nucleobase-containing compound metabolic process DNA repair protein K48-linked ubiquitination cellular response to nitrogen compound response to endogenous stimulus response to peptide hormone response to oxygen-containing compound cellular response to peptide hormone stimulus response to nitrogen compound regulation of cellular response to insulin stimulus cellular response to oxygen-containing compound cellular response to endogenous stimulus response to hormone response to insulin cellular response to insulin stimulus cellular response to hormone stimulus protein monoubiquitination positive regulation of cell communication positive regulation of signal transduction positive regulation of canonical NF-kappaB signal transduction positive regulation of response to stimulus regulation of intracellular signal transduction positive regulation of intracellular signal transduction canonical NF-kappaB signal transduction regulation of canonical NF-kappaB signal transduction positive regulation of signaling protein neddylation SCF-dependent proteasomal ubiquitin-dependent protein catabolic process regulation of protein modification process regulation of protein autoubiquitination regulation of protein ubiquitination positive regulation of post-translational protein modification positive regulation of protein modification process regulation of protein modification by small protein conjugation or removal positive regulation of protein modification by small protein conjugation or removal positive regulation of protein ubiquitination regulation of post-translational protein modification protein autoubiquitination positive regulation of protein autoubiquitination positive regulation of TORC1 signaling positive regulation of TOR signaling regulation of TORC1 signaling TOR signaling regulation of TOR signaling TORC1 signaling T cell activation immune system process cell activation lymphocyte activation leukocyte activation response to light stimulus cellular response to radiation response to UV cellular response to environmental stimulus cellular response to light stimulus response to radiation response to abiotic stimulus cellular response to abiotic stimulus cellular response to UV	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol cullin-RING ubiquitin ligase complex protein-containing complex ubiquitin ligase complex catalytic complex transferase complex intracellular protein-containing complex Cul5-RING ubiquitin ligase complex Cul4-RING E3 ubiquitin ligase complex Cul4A-RING E3 ubiquitin ligase complex membrane-bounded organelle cellular anatomical structure intracellular anatomical structure cytoplasm cytosol cullin-RING ubiquitin ligase complex protein-containing complex ubiquitin ligase complex catalytic complex transferase complex intracellular protein-containing complex Cul5-RING ubiquitin ligase complex Cul4-RING E3 ubiquitin ligase complex Cul4A-RING E3 ubiquitin ligase complex membrane-bounded organelle nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen organelle nuclear lumen SCF ubiquitin ligase complex Cul7-RING ubiquitin ligase complex Cul3-RING ubiquitin ligase complex Cul4B-RING E3 ubiquitin ligase complex Cul2-RING ubiquitin ligase complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR045093	Cullin	Family
A	IPR019559	Cullin protein, neddylation domain	Domain
A	IPR016158	Cullin homology domain	Domain
A	IPR016157	Cullin, conserved site	Conserved Site
A	IPR001373	Cullin, N-terminal	Domain
A	IPR036388	Winged helix-like DNA-binding domain superfamily	Homologous Superfamily
A	IPR036390	Winged helix DNA-binding domain superfamily	Homologous Superfamily
A	IPR036317	Cullin homology domain superfamily	Homologous Superfamily
A	IPR016159	Cullin repeat-like-containing domain superfamily	Homologous Superfamily
B	IPR051031	RING-box E3 Ubiquitin Ligase	Family
B	IPR024766	Zinc finger, RING-H2-type	Domain
B	IPR013083	Zinc finger, RING/FYVE/PHD-type	Homologous Superfamily
B	IPR001841	Zinc finger, RING-type	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: Q13616	Stevens-Johnson syndrome Drug-Induced Stevens Johnson Syndrome ovarian cancer toxic epidermal necrolysis inflammatory bowel disease
B	Pharos: P62877	Stevens-Johnson syndrome acute myeloid leukemia Drug-Induced Stevens Johnson Syndrome ovarian cancer toxic epidermal necrolysis astrocytic tumor endogenous depression Crohn disease

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.