2XTZ

Crystal structure of the G alpha protein AtGPA1 from Arabidopsis thaliana

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	8056803	3002022	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Ras-like P-loop GTPases	8056803	3002022	SCOP2B (2022-06-29)
A	SCOP2 Family	Galpha subunit-like	8056802	4004049	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Ras-like P-loop GTPases	8056803	3002022	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Galpha insert domain-like	8056804	3000669	SCOP2 (2022-06-29)
C	SCOP2B Superfamily	Ras-like P-loop GTPases	8056803	3002022	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Ras-like P-loop GTPases	8056803	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)
B	PF00503	e2xtzB2	A: alpha arrays	X: Transducin (alpha subunit), insertion domain (From Topology)	H: Transducin (alpha subunit), insertion domain (From Topology)	T: Transducin (alpha subunit), insertion domain	F: PF00503	ECOD (1.6)
B	PF00503	e2xtzB1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: PF00503	ECOD (1.6)
A	PF00503	e2xtzA1	A: alpha arrays	X: Transducin (alpha subunit), insertion domain (From Topology)	H: Transducin (alpha subunit), insertion domain (From Topology)	T: Transducin (alpha subunit), insertion domain	F: PF00503	ECOD (1.6)
A	PF00503	e2xtzA2	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: PF00503	ECOD (1.6)
C	PF00503	e2xtzC2	A: alpha arrays	X: Transducin (alpha subunit), insertion domain (From Topology)	H: Transducin (alpha subunit), insertion domain (From Topology)	T: Transducin (alpha subunit), insertion domain	F: PF00503	ECOD (1.6)
C	PF00503	e2xtzC1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: PF00503	ECOD (1.6)

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)
C	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)
C	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, C	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, C	GUANINE NUCLEOTIDE-BINDING PROTEIN ALPHA-1 SUBUNIT	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 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 protein binding enzyme binding GTPase binding GTPase regulator activity enzyme regulator activity GTPase inhibitor activity molecular function inhibitor activity nucleoside-triphosphatase regulator activity molecular function regulator activity enzyme inhibitor activity channel regulator activity transporter regulator activity protein-containing complex binding G-protein beta/gamma-subunit complex binding signaling receptor binding G protein-coupled receptor binding cation binding metal ion 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	oxoacid metabolic process cellular biosynthetic process organonitrogen compound biosynthetic process amino acid metabolic process organic acid biosynthetic process organic acid metabolic process alpha-amino acid metabolic process carboxylic acid biosynthetic process organic substance metabolic process organic substance biosynthetic process small molecule metabolic process tyrosine metabolic process erythrose 4-phosphate/phosphoenolpyruvate family amino acid metabolic process organonitrogen compound metabolic process oxoacid metabolic process cellular biosynthetic process organonitrogen compound biosynthetic process amino acid metabolic process organic acid biosynthetic process organic acid metabolic process alpha-amino acid metabolic process carboxylic acid biosynthetic process organic substance metabolic process organic substance biosynthetic process small molecule metabolic process tyrosine metabolic process erythrose 4-phosphate/phosphoenolpyruvate family amino acid metabolic process organonitrogen compound metabolic process aromatic amino acid family biosynthetic process aromatic amino acid metabolic process small molecule biosynthetic process cellular metabolic process carboxylic acid metabolic process primary metabolic process L-amino acid biosynthetic process L-amino acid metabolic process aromatic amino acid family biosynthetic process, prephenate pathway organic cyclic compound metabolic process proteinogenic amino acid metabolic process amino acid biosynthetic process biosynthetic process organic cyclic compound biosynthetic process proteinogenic amino acid biosynthetic process metabolic process cellular process erythrose 4-phosphate/phosphoenolpyruvate family amino acid biosynthetic process tyrosine biosynthetic process alpha-amino acid biosynthetic process cellular response to stimulus cellular response to gibberellin stimulus response to organic substance regulation of cellular process response to lipid response to stimulus signaling hormone-mediated signaling pathway cell communication response to gibberellin cellular response to endogenous stimulus response to hormone cellular response to organic substance signal transduction cellular response to hormone stimulus gibberellin mediated signaling pathway regulation of biological process response to endogenous stimulus gibberellic acid mediated signaling pathway biological regulation response to oxygen-containing compound cellular response to oxygen-containing compound cellular response to chemical stimulus response to chemical cellular response to lipid positive regulation of cell communication positive regulation of signal transduction abscisic acid-activated signaling pathway positive regulation of biological process regulation of signal transduction positive regulation of response to stimulus regulation of cellular response to alcohol positive regulation of cellular process cellular response to abscisic acid stimulus regulation of signaling regulation of response to alcohol response to abscisic acid response to alcohol positive regulation of abscisic acid-activated signaling pathway cellular response to alcohol regulation of response to stimulus regulation of cell communication regulation of abscisic acid-activated signaling pathway positive regulation of signaling response to light stimulus intracellular receptor signaling pathway cellular response to radiation response to blue light cellular response to environmental stimulus cellular response to light stimulus response to radiation response to abiotic stimulus cellular response to abiotic stimulus blue light signaling pathway cellular response to blue light membrane organization cellular component organization plastid membrane organization organelle organization plastid organization cellular component organization or biogenesis thylakoid membrane organization regulation of stomatal movement stomatal movement reactive oxygen species metabolic process adenylate cyclase-modulating G protein-coupled receptor signaling pathway G protein-coupled receptor signaling pathway developmental process multicellular organism development multicellular organismal process anatomical structure development post-embryonic development seed germination seedling development response to hexose response to monosaccharide response to carbohydrate response to glucose response to low light intensity stimulus response to light intensity response to low fluence blue light stimulus by blue low-fluence system response to pheromone cell death L-phenylalanine biosynthetic process L-phenylalanine metabolic process stomatal closure regulation of stomatal closure cell population proliferation regulation of cell population proliferation sphingolipid mediated signaling pathway sphingosine-1-phosphate receptor signaling pathway	protein-containing complex extrinsic component of plasma membrane catalytic complex plasma membrane protein complex cytoplasmic side of membrane membrane plasma membrane membrane protein complex cellular anatomical entity heterotrimeric G-protein complex side of membrane cell periphery cytoplasmic side of plasma membrane GTPase complex protein-containing complex extrinsic component of plasma membrane catalytic complex plasma membrane protein complex cytoplasmic side of membrane membrane plasma membrane membrane protein complex cellular anatomical entity heterotrimeric G-protein complex side of membrane cell periphery cytoplasmic side of plasma membrane GTPase complex extrinsic component of membrane extrinsic component of cytoplasmic side of plasma membrane membrane-bounded organelle intracellular anatomical structure organelle subcompartment intracellular membrane-bounded organelle endomembrane system endoplasmic reticulum subcompartment intracellular organelle organelle nuclear outer membrane-endoplasmic reticulum membrane network endoplasmic reticulum cytoplasm organelle membrane endoplasmic reticulum membrane peroxisome microbody cell-cell junction symplast anchoring junction cell junction plasmodesma

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C	IPR001019	Guanine nucleotide binding protein (G-protein), alpha subunit	Family
A, B, C	IPR011025	G protein alpha subunit, helical insertion	Homologous Superfamily
A, B, C	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A, B, C	IPR002976	Plant G-protein, alpha subunit	Family

Protein Modification Annotation

Modified Residue(s)
Chain	Residue(s)	Description
A, B, C	CSS	Parent Component: CYS RESID: AA0269 PSI-MOD : L-cysteine persulfide MOD:00274

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 R01GM133198.