Annotations: 4FID

Crystal structure of a heterotrimeric G-Protein subunit from entamoeba histolytica, EHG-ALPHA-1

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Protein Modification Annotation

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	Ras-like P-loop GTPases	8056806	3002022	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Ras-like P-loop GTPases	8056806	3002022	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Galpha insert domain-like	8056807	3000669	SCOP2B (2022-06-29)
A	SCOP2 Family	Galpha subunit-like	8056805	4004049	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Ras-like P-loop GTPases	8056806	3002022	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Galpha insert domain-like	8056807	3000669	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)
B	ABC_tran	e4fidB1	A: alpha arrays	X: Thioredoxin-like	H: Thioredoxin-like	T: Thioredoxin-like	F: ABC_tran	ECOD (v295.2)
A	PK_Tyr_Ser-Thr	e4fidA1	A: alpha arrays	X: GIY-YIG endonuclease	H: GIY-YIG endonuclease	T: GIY-YIG endonuclease	F: PK_Tyr_Ser-Thr	ECOD (v295.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
B	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)
B	1.10.400.10	Mainly Alpha	Orthogonal Bundle	GI Alpha 1, domain 2-like	GI Alpha 1, domain 2-like	CATH (4.3.0)
A	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)
A	1.10.400.10	Mainly Alpha	Orthogonal Bundle	GI Alpha 1, domain 2-like	GI Alpha 1, domain 2-like	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF00503	G-protein alpha subunit (G-alpha)	G-protein alpha subunit	G proteins couple receptors of extracellular signals to intracellular signaling pathways. The G protein alpha subunit binds guanyl nucleotide and is a weak GTPase. A set of residues that are unique to G-alpha as compared to its ancestor the Arf-like ...	G proteins couple receptors of extracellular signals to intracellular signaling pathways. The G protein alpha subunit binds guanyl nucleotide and is a weak GTPase. A set of residues that are unique to G-alpha as compared to its ancestor the Arf-like family form a ring of residues centered on the nucleotide binding site [3]. A Ggamma is found fused to an inactive Galpha in the Dictyostelium protein gbqA [3].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	G protein alpha subunit	protein-containing complex binding binding G-protein beta/gamma-subunit complex binding guanyl nucleotide binding nucleoside phosphate binding purine nucleotide binding nucleotide binding heterocyclic compound binding small molecule binding protein binding signaling receptor binding G protein-coupled receptor binding pyrophosphatase activity GTPase activity protein-containing complex binding binding G-protein beta/gamma-subunit complex binding guanyl nucleotide binding nucleoside phosphate binding purine nucleotide binding nucleotide binding heterocyclic compound binding small molecule binding protein binding signaling receptor binding G protein-coupled receptor binding pyrophosphatase activity GTPase activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides catalytic activity	cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus signaling biological regulation cell communication adenylate cyclase-modulating G protein-coupled receptor signaling pathway G protein-coupled receptor signaling pathway cellular process signal transduction	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR001019	Guanine nucleotide binding protein, alpha subunit	Family
A, B	IPR011025	G protein alpha subunit, helical insertion	Homologous Superfamily
A, B	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
A, B	MLY	Parent Component: LYS : AA0075 : N6,N6-dimethyl-L-lysine MOD:00084
A, B	MSE	Parent Component: MET : AA0075