2FMX

An open conformation of switch I revealed by Sar1-GDP crystal structure at low Mg(2+)

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2fmxa_	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	G proteins	automated matches	Chinese hamster (Cricetulus griseus ) [TaxId: 10029 ],	SCOPe (2.08)
B	d2fmxb_	Alpha and beta proteins (a/b)	P-loop containing nucleoside triphosphate hydrolases	P-loop containing nucleoside triphosphate hydrolases	G proteins	automated matches	Chinese hamster (Cricetulus griseus ) [TaxId: 10029 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Ras-like P-loop GTPases	8060269	3002022	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Ras-like P-loop GTPases	8060269	3002022	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	Ras	e2fmxA1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: Ras	ECOD (1.6)
B	Ras	e2fmxB1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: Ras	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)
B	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	GTP-binding protein SAR1b	pyrophosphatase activity GTPase activity G protein activity ribonucleoside triphosphate phosphatase activity molecular function regulator activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides catalytic activity binding guanyl nucleotide binding GTP binding nucleotide binding guanyl ribonucleotide binding pyrophosphatase activity GTPase activity G protein activity ribonucleoside triphosphate phosphatase activity molecular function regulator activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides catalytic activity binding guanyl nucleotide binding GTP binding nucleotide binding guanyl ribonucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding organic cyclic compound binding purine nucleotide binding anion binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding cation binding metal ion binding	protein localization establishment of protein localization cellular localization nitrogen compound transport transport lipoprotein transport establishment of localization localization protein transport cellular macromolecule localization macromolecule localization cellular process lipoprotein localization intracellular transport protein localization establishment of protein localization cellular localization nitrogen compound transport transport lipoprotein transport establishment of localization localization protein transport cellular macromolecule localization macromolecule localization cellular process lipoprotein localization intracellular transport establishment of localization in cell intracellular protein transport establishment of organelle localization vesicle budding from membrane regulation of cellular component organization regulation of cellular process vesicle targeting, to, from or within Golgi vesicle-mediated transport vesicle targeting cellular component organization cellular component biogenesis vesicle organization regulation of protein-containing complex assembly cellular component assembly organelle localization protein-containing complex assembly vesicle coating regulation of COPII vesicle coating cellular component organization or biogenesis vesicle targeting, rough ER to cis-Golgi membrane organization vesicle localization regulation of biological process protein-containing complex organization establishment of vesicle localization biological regulation endoplasmic reticulum to Golgi vesicle-mediated transport regulation of cellular component biogenesis regulation of organelle organization organelle organization COPII-coated vesicle budding COPII vesicle coating Golgi vesicle transport chemical homeostasis homeostatic process lipid homeostasis vesicle cargo loading COPII-coated vesicle cargo loading lipid export from cell lipid localization export from cell lipid transport regulation of protein exit from endoplasmic reticulum regulation of localization protein exit from endoplasmic reticulum regulation of protein localization positive regulation of biological process positive regulation of establishment of protein localization positive regulation of protein transport positive regulation of intracellular transport positive regulation of cellular process regulation of intracellular transport regulation of transport regulation of establishment of protein localization regulation of protein transport positive regulation of protein exit from endoplasmic reticulum positive regulation of transport regulation of cellular localization positive regulation of protein localization regulation of intracellular protein transport positive regulation of intracellular protein transport regulation of lipid transport regulation of lipid localization	membrane-bounded organelle intracellular organelle intracellular anatomical structure organelle endoplasmic reticulum exit site endoplasmic reticulum cytoplasm cellular anatomical entity intracellular membrane-bounded organelle endomembrane system vacuolar membrane membrane lytic vacuole vacuole membrane-bounded organelle intracellular organelle intracellular anatomical structure organelle endoplasmic reticulum exit site endoplasmic reticulum cytoplasm cellular anatomical entity intracellular membrane-bounded organelle endomembrane system vacuolar membrane membrane lytic vacuole vacuole lytic vacuole membrane bounding membrane of organelle lysosomal membrane organelle membrane lysosome cytosol Golgi cisterna membrane Golgi apparatus subcompartment Golgi apparatus organelle subcompartment Golgi cisterna Golgi stack protein-containing complex vesicle coat intracellular vesicle transport vesicle membrane membrane protein complex membrane coat vesicle membrane cytoplasmic vesicle ER to Golgi transport vesicle membrane coated vesicle vesicle transport vesicle coated membrane COPII vesicle coat cytoplasmic vesicle membrane coated vesicle membrane COPII-coated ER to Golgi transport vesicle endoplasmic reticulum subcompartment nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR005225	Small GTP-binding domain	Domain
A, B	IPR006687	Small GTPase superfamily, SAR1-type	Family
A, B	IPR006689	Small GTPase superfamily, ARF/SAR type	Family
A, B	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily

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.