Annotations: 3MKR

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Coatomer epsilon subunit-like	8046375	4005048	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	TPR-like	8095919	3001345	SCOP2 (2022-06-29)
B	SCOP2 Family	Coatomer alpha subunit C-terminal region-like	8048956	4006290	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	TPR-like	8095920	3001345	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	RING/U-box like	8095923	3000160	SCOP2 (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	Coatomer_E	e3mkrA1	A: alpha superhelices	X: Repetitive alpha hairpins	H: ARM repeat (From Topology)	T: ARM repeat	F: Coatomer_E	ECOD (1.6)
B	COPI_C	e3mkrB1	A: alpha superhelices	X: Repetitive alpha hairpins	H: Coatomer subunit alpha C-terminal domain (From Topology)	T: Coatomer subunit alpha C-terminal domain	F: COPI_C	ECOD (1.6)
B	COPI_C	e3mkrB2	A: few secondary structure elements	X: RING/U-box-like	H: RING/U-box-like	T: RING/U-box	F: COPI_C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.25.40.10	Mainly Alpha	Alpha Horseshoe	Serine Threonine Protein Phosphatase 5, Tetratricopeptide repeat	Tetratricopeptide repeat domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF04733	Coatomer epsilon subunit (Coatomer_E)	Coatomer epsilon subunit	-	Repeat
B	PF06957	Coatomer (COPI) alpha subunit C-terminus (COPI_C)	Coatomer (COPI) alpha subunit C-terminus	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Coatomer subunit epsilon	structural molecule activity	localization transport cellular process establishment of localization Golgi vesicle transport vesicle-mediated transport intra-Golgi vesicle-mediated transport protein localization cellular localization cellular macromolecule localization macromolecule localization protein localization to axon retrograde vesicle-mediated transport, Golgi to endoplasmic reticulum establishment of localization in cell localization transport cellular process establishment of localization Golgi vesicle transport vesicle-mediated transport intra-Golgi vesicle-mediated transport protein localization cellular localization cellular macromolecule localization macromolecule localization protein localization to axon retrograde vesicle-mediated transport, Golgi to endoplasmic reticulum establishment of localization in cell intracellular transport endoplasmic reticulum to Golgi vesicle-mediated transport establishment of protein localization nitrogen compound transport organic substance transport protein transport	membrane-bounded organelle protein-containing complex intracellular anatomical structure vesicle coat intracellular vesicle membrane protein complex endomembrane system COPI-coated vesicle membrane coat intracellular organelle bounding membrane of organelle vesicle membrane cytoplasmic vesicle coated vesicle membrane-bounded organelle protein-containing complex intracellular anatomical structure vesicle coat intracellular vesicle membrane protein complex endomembrane system COPI-coated vesicle membrane coat intracellular organelle bounding membrane of organelle vesicle membrane cytoplasmic vesicle coated vesicle Golgi-associated vesicle vesicle COPI vesicle coat Golgi apparatus membrane cellular anatomical entity coated membrane intracellular membrane-bounded organelle COPI-coated vesicle membrane coated vesicle membrane cytoplasmic vesicle membrane organelle Golgi-associated vesicle membrane cytoplasm organelle membrane Golgi membrane nucleus membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen
B	Coatomer subunit alpha	hormone activity protein binding binding molecular function activator activity signaling receptor binding molecular function regulator activity signaling receptor regulator activity receptor ligand activity signaling receptor activator activity structural molecule activity	localization transport cellular process establishment of localization Golgi vesicle transport vesicle-mediated transport intra-Golgi vesicle-mediated transport protein localization cellular localization establishment of protein localization nitrogen compound transport organic substance transport intracellular transport protein transport localization transport cellular process establishment of localization Golgi vesicle transport vesicle-mediated transport intra-Golgi vesicle-mediated transport protein localization cellular localization establishment of protein localization nitrogen compound transport organic substance transport intracellular transport protein transport establishment of localization in cell cellular macromolecule localization macromolecule localization intracellular protein transport retrograde vesicle-mediated transport, Golgi to endoplasmic reticulum endoplasmic reticulum to Golgi vesicle-mediated transport	membrane-bounded organelle protein-containing complex intracellular anatomical structure vesicle coat intracellular vesicle membrane protein complex endomembrane system COPI-coated vesicle membrane coat intracellular organelle bounding membrane of organelle vesicle membrane cytoplasmic vesicle coated vesicle membrane-bounded organelle protein-containing complex intracellular anatomical structure vesicle coat intracellular vesicle membrane protein complex endomembrane system COPI-coated vesicle membrane coat intracellular organelle bounding membrane of organelle vesicle membrane cytoplasmic vesicle coated vesicle Golgi-associated vesicle vesicle COPI vesicle coat Golgi apparatus membrane cellular anatomical entity coated membrane intracellular membrane-bounded organelle COPI-coated vesicle membrane coated vesicle membrane cytoplasmic vesicle membrane organelle Golgi-associated vesicle membrane cytoplasm organelle membrane extracellular region Golgi membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR006822	Coatomer, epsilon subunit	Family
A	IPR011990	Tetratricopeptide-like helical domain superfamily	Homologous Superfamily
B	IPR019775	WD40 repeat, conserved site	Conserved Site
B	IPR036322	WD40-repeat-containing domain superfamily	Homologous Superfamily
B	IPR016391	Coatomer subunit alpha	Family
B	IPR006692	Coatomer, WD associated region	Domain
B	IPR010714	Coatomer, alpha subunit, C-terminal	Domain
B	IPR001680	WD40 repeat	Repeat
B	IPR047312	Coatomer subunit alpha, WD Associated Region	Domain
B	IPR020472	G-protein beta WD-40 repeat	Repeat
B	IPR015943	WD40/YVTN repeat-like-containing domain superfamily	Homologous Superfamily

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.