Annotations: 1IS8

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1is8a_	Alpha and beta proteins (a+b)	T-fold	Tetrahydrobiopterin biosynthesis enzymes-like	GTP cyclohydrolase I	GTP cyclohydrolase I	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
B	d1is8b_	Alpha and beta proteins (a+b)	T-fold	Tetrahydrobiopterin biosynthesis enzymes-like	GTP cyclohydrolase I	GTP cyclohydrolase I	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
C	d1is8c_	Alpha and beta proteins (a+b)	T-fold	Tetrahydrobiopterin biosynthesis enzymes-like	GTP cyclohydrolase I	GTP cyclohydrolase I	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
D	d1is8d_	Alpha and beta proteins (a+b)	T-fold	Tetrahydrobiopterin biosynthesis enzymes-like	GTP cyclohydrolase I	GTP cyclohydrolase I	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
E	d1is8e_	Alpha and beta proteins (a+b)	T-fold	Tetrahydrobiopterin biosynthesis enzymes-like	GTP cyclohydrolase I	GTP cyclohydrolase I	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
F	d1is8f_	Alpha and beta proteins (a+b)	T-fold	Tetrahydrobiopterin biosynthesis enzymes-like	GTP cyclohydrolase I	GTP cyclohydrolase I	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
G	d1is8g_	Alpha and beta proteins (a+b)	T-fold	Tetrahydrobiopterin biosynthesis enzymes-like	GTP cyclohydrolase I	GTP cyclohydrolase I	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
H	d1is8h_	Alpha and beta proteins (a+b)	T-fold	Tetrahydrobiopterin biosynthesis enzymes-like	GTP cyclohydrolase I	GTP cyclohydrolase I	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
I	d1is8i_	Alpha and beta proteins (a+b)	T-fold	Tetrahydrobiopterin biosynthesis enzymes-like	GTP cyclohydrolase I	GTP cyclohydrolase I	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
J	d1is8j_	Alpha and beta proteins (a+b)	T-fold	Tetrahydrobiopterin biosynthesis enzymes-like	GTP cyclohydrolase I	GTP cyclohydrolase I	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
K	d1is8k_	Alpha and beta proteins (a+b)	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
L	d1is8l_	Alpha and beta proteins (a+b)	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
M	d1is8m_	Alpha and beta proteins (a+b)	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
N	d1is8n_	Alpha and beta proteins (a+b)	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
O	d1is8o_	Alpha and beta proteins (a+b)	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
P	d1is8p_	Alpha and beta proteins (a+b)	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
Q	d1is8q_	Alpha and beta proteins (a+b)	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
R	d1is8r_	Alpha and beta proteins (a+b)	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
S	d1is8s_	Alpha and beta proteins (a+b)	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)
T	d1is8t_	Alpha and beta proteins (a+b)	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	GTP cyclohydrolase I feedback regulatory protein, GFRP	Norway rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Tetrahydrobiopterin biosynthesis enzymes-like	8041793	3000283	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Tetrahydrobiopterin biosynthesis enzymes-like	8041793	3000283	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Tetrahydrobiopterin biosynthesis enzymes-like	8041793	3000283	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Tetrahydrobiopterin biosynthesis enzymes-like	8041793	3000283	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Tetrahydrobiopterin biosynthesis enzymes-like	8041793	3000283	SCOP2B (2022-06-29)
F	SCOP2B Superfamily	Tetrahydrobiopterin biosynthesis enzymes-like	8041793	3000283	SCOP2B (2022-06-29)
G	SCOP2B Superfamily	Tetrahydrobiopterin biosynthesis enzymes-like	8041793	3000283	SCOP2B (2022-06-29)
H	SCOP2B Superfamily	Tetrahydrobiopterin biosynthesis enzymes-like	8041793	3000283	SCOP2B (2022-06-29)
I	SCOP2B Superfamily	Tetrahydrobiopterin biosynthesis enzymes-like	8041793	3000283	SCOP2B (2022-06-29)
J	SCOP2B Superfamily	Tetrahydrobiopterin biosynthesis enzymes-like	8041793	3000283	SCOP2B (2022-06-29)
K	SCOP2B Superfamily	GTP cyclohydrolase I feedback regulatory protein GFRP	8036999	3000919	SCOP2B (2022-06-29)
L	SCOP2B Superfamily	GTP cyclohydrolase I feedback regulatory protein GFRP	8036999	3000919	SCOP2B (2022-06-29)
M	SCOP2B Superfamily	GTP cyclohydrolase I feedback regulatory protein GFRP	8036999	3000919	SCOP2B (2022-06-29)
N	SCOP2B Superfamily	GTP cyclohydrolase I feedback regulatory protein GFRP	8036999	3000919	SCOP2B (2022-06-29)
O	SCOP2B Superfamily	GTP cyclohydrolase I feedback regulatory protein GFRP	8036999	3000919	SCOP2B (2022-06-29)
P	SCOP2B Superfamily	GTP cyclohydrolase I feedback regulatory protein GFRP	8036999	3000919	SCOP2B (2022-06-29)
Q	SCOP2B Superfamily	GTP cyclohydrolase I feedback regulatory protein GFRP	8036999	3000919	SCOP2B (2022-06-29)
R	SCOP2B Superfamily	GTP cyclohydrolase I feedback regulatory protein GFRP	8036999	3000919	SCOP2B (2022-06-29)
S	SCOP2B Superfamily	GTP cyclohydrolase I feedback regulatory protein GFRP	8036999	3000919	SCOP2B (2022-06-29)
T	SCOP2B Superfamily	GTP cyclohydrolase I feedback regulatory protein GFRP	8036999	3000919	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	PF01227	e1is8A1	A: a+b two layers	X: T-fold	H: Tetrahydrobiopterin biosynthesis enzymes-like (From Topology)	T: Tetrahydrobiopterin biosynthesis enzymes-like	F: PF01227	ECOD (1.6)
B	PF01227	e1is8B1	A: a+b two layers	X: T-fold	H: Tetrahydrobiopterin biosynthesis enzymes-like (From Topology)	T: Tetrahydrobiopterin biosynthesis enzymes-like	F: PF01227	ECOD (1.6)
C	PF01227	e1is8C1	A: a+b two layers	X: T-fold	H: Tetrahydrobiopterin biosynthesis enzymes-like (From Topology)	T: Tetrahydrobiopterin biosynthesis enzymes-like	F: PF01227	ECOD (1.6)
D	PF01227	e1is8D1	A: a+b two layers	X: T-fold	H: Tetrahydrobiopterin biosynthesis enzymes-like (From Topology)	T: Tetrahydrobiopterin biosynthesis enzymes-like	F: PF01227	ECOD (1.6)
E	PF01227	e1is8E1	A: a+b two layers	X: T-fold	H: Tetrahydrobiopterin biosynthesis enzymes-like (From Topology)	T: Tetrahydrobiopterin biosynthesis enzymes-like	F: PF01227	ECOD (1.6)
F	PF01227	e1is8F1	A: a+b two layers	X: T-fold	H: Tetrahydrobiopterin biosynthesis enzymes-like (From Topology)	T: Tetrahydrobiopterin biosynthesis enzymes-like	F: PF01227	ECOD (1.6)
G	PF01227	e1is8G1	A: a+b two layers	X: T-fold	H: Tetrahydrobiopterin biosynthesis enzymes-like (From Topology)	T: Tetrahydrobiopterin biosynthesis enzymes-like	F: PF01227	ECOD (1.6)
H	PF01227	e1is8H1	A: a+b two layers	X: T-fold	H: Tetrahydrobiopterin biosynthesis enzymes-like (From Topology)	T: Tetrahydrobiopterin biosynthesis enzymes-like	F: PF01227	ECOD (1.6)
I	PF01227	e1is8I1	A: a+b two layers	X: T-fold	H: Tetrahydrobiopterin biosynthesis enzymes-like (From Topology)	T: Tetrahydrobiopterin biosynthesis enzymes-like	F: PF01227	ECOD (1.6)
J	PF01227	e1is8J1	A: a+b two layers	X: T-fold	H: Tetrahydrobiopterin biosynthesis enzymes-like (From Topology)	T: Tetrahydrobiopterin biosynthesis enzymes-like	F: PF01227	ECOD (1.6)
K	PF06399	e1is8K1	A: a+b two layers	X: Glucose permease domain IIB-like	H: GTP cyclohydrolase I feedback regulatory protein, GFRP (From Topology)	T: GTP cyclohydrolase I feedback regulatory protein, GFRP	F: PF06399	ECOD (1.6)
L	PF06399	e1is8L1	A: a+b two layers	X: Glucose permease domain IIB-like	H: GTP cyclohydrolase I feedback regulatory protein, GFRP (From Topology)	T: GTP cyclohydrolase I feedback regulatory protein, GFRP	F: PF06399	ECOD (1.6)
M	PF06399	e1is8M1	A: a+b two layers	X: Glucose permease domain IIB-like	H: GTP cyclohydrolase I feedback regulatory protein, GFRP (From Topology)	T: GTP cyclohydrolase I feedback regulatory protein, GFRP	F: PF06399	ECOD (1.6)
N	PF06399	e1is8N1	A: a+b two layers	X: Glucose permease domain IIB-like	H: GTP cyclohydrolase I feedback regulatory protein, GFRP (From Topology)	T: GTP cyclohydrolase I feedback regulatory protein, GFRP	F: PF06399	ECOD (1.6)
O	PF06399	e1is8O1	A: a+b two layers	X: Glucose permease domain IIB-like	H: GTP cyclohydrolase I feedback regulatory protein, GFRP (From Topology)	T: GTP cyclohydrolase I feedback regulatory protein, GFRP	F: PF06399	ECOD (1.6)
P	PF06399	e1is8P1	A: a+b two layers	X: Glucose permease domain IIB-like	H: GTP cyclohydrolase I feedback regulatory protein, GFRP (From Topology)	T: GTP cyclohydrolase I feedback regulatory protein, GFRP	F: PF06399	ECOD (1.6)
Q	PF06399	e1is8Q1	A: a+b two layers	X: Glucose permease domain IIB-like	H: GTP cyclohydrolase I feedback regulatory protein, GFRP (From Topology)	T: GTP cyclohydrolase I feedback regulatory protein, GFRP	F: PF06399	ECOD (1.6)
R	PF06399	e1is8R1	A: a+b two layers	X: Glucose permease domain IIB-like	H: GTP cyclohydrolase I feedback regulatory protein, GFRP (From Topology)	T: GTP cyclohydrolase I feedback regulatory protein, GFRP	F: PF06399	ECOD (1.6)
S	PF06399	e1is8S1	A: a+b two layers	X: Glucose permease domain IIB-like	H: GTP cyclohydrolase I feedback regulatory protein, GFRP (From Topology)	T: GTP cyclohydrolase I feedback regulatory protein, GFRP	F: PF06399	ECOD (1.6)
T	PF06399	e1is8T1	A: a+b two layers	X: Glucose permease domain IIB-like	H: GTP cyclohydrolase I feedback regulatory protein, GFRP (From Topology)	T: GTP cyclohydrolase I feedback regulatory protein, GFRP	F: PF06399	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.286.10	Mainly Alpha	Orthogonal Bundle	GTP Cyclohydrolase I	Chain A, domain 1	CATH (4.3.0)
A	3.30.1130.10	Alpha Beta	2-Layer Sandwich	GTP Cyclohydrolase I, domain 2	GTP cyclohydrolase I, C-terminal domain/NADPH-dependent 7-cyano-7-deazaguanine reductase, N-terminal domain	CATH (4.3.0)
B	1.10.286.10	Mainly Alpha	Orthogonal Bundle	GTP Cyclohydrolase I	Chain A, domain 1	CATH (4.3.0)
B	3.30.1130.10	Alpha Beta	2-Layer Sandwich	GTP Cyclohydrolase I, domain 2	GTP cyclohydrolase I, C-terminal domain/NADPH-dependent 7-cyano-7-deazaguanine reductase, N-terminal domain	CATH (4.3.0)
C	1.10.286.10	Mainly Alpha	Orthogonal Bundle	GTP Cyclohydrolase I	Chain A, domain 1	CATH (4.3.0)
C	3.30.1130.10	Alpha Beta	2-Layer Sandwich	GTP Cyclohydrolase I, domain 2	GTP cyclohydrolase I, C-terminal domain/NADPH-dependent 7-cyano-7-deazaguanine reductase, N-terminal domain	CATH (4.3.0)
D	1.10.286.10	Mainly Alpha	Orthogonal Bundle	GTP Cyclohydrolase I	Chain A, domain 1	CATH (4.3.0)
D	3.30.1130.10	Alpha Beta	2-Layer Sandwich	GTP Cyclohydrolase I, domain 2	GTP cyclohydrolase I, C-terminal domain/NADPH-dependent 7-cyano-7-deazaguanine reductase, N-terminal domain	CATH (4.3.0)
E	1.10.286.10	Mainly Alpha	Orthogonal Bundle	GTP Cyclohydrolase I	Chain A, domain 1	CATH (4.3.0)
E	3.30.1130.10	Alpha Beta	2-Layer Sandwich	GTP Cyclohydrolase I, domain 2	GTP cyclohydrolase I, C-terminal domain/NADPH-dependent 7-cyano-7-deazaguanine reductase, N-terminal domain	CATH (4.3.0)
F	1.10.286.10	Mainly Alpha	Orthogonal Bundle	GTP Cyclohydrolase I	Chain A, domain 1	CATH (4.3.0)
F	3.30.1130.10	Alpha Beta	2-Layer Sandwich	GTP Cyclohydrolase I, domain 2	GTP cyclohydrolase I, C-terminal domain/NADPH-dependent 7-cyano-7-deazaguanine reductase, N-terminal domain	CATH (4.3.0)
G	1.10.286.10	Mainly Alpha	Orthogonal Bundle	GTP Cyclohydrolase I	Chain A, domain 1	CATH (4.3.0)
G	3.30.1130.10	Alpha Beta	2-Layer Sandwich	GTP Cyclohydrolase I, domain 2	GTP cyclohydrolase I, C-terminal domain/NADPH-dependent 7-cyano-7-deazaguanine reductase, N-terminal domain	CATH (4.3.0)
H	1.10.286.10	Mainly Alpha	Orthogonal Bundle	GTP Cyclohydrolase I	Chain A, domain 1	CATH (4.3.0)
H	3.30.1130.10	Alpha Beta	2-Layer Sandwich	GTP Cyclohydrolase I, domain 2	GTP cyclohydrolase I, C-terminal domain/NADPH-dependent 7-cyano-7-deazaguanine reductase, N-terminal domain	CATH (4.3.0)
I	1.10.286.10	Mainly Alpha	Orthogonal Bundle	GTP Cyclohydrolase I	Chain A, domain 1	CATH (4.3.0)
I	3.30.1130.10	Alpha Beta	2-Layer Sandwich	GTP Cyclohydrolase I, domain 2	GTP cyclohydrolase I, C-terminal domain/NADPH-dependent 7-cyano-7-deazaguanine reductase, N-terminal domain	CATH (4.3.0)
J	1.10.286.10	Mainly Alpha	Orthogonal Bundle	GTP Cyclohydrolase I	Chain A, domain 1	CATH (4.3.0)
J	3.30.1130.10	Alpha Beta	2-Layer Sandwich	GTP Cyclohydrolase I, domain 2	GTP cyclohydrolase I, C-terminal domain/NADPH-dependent 7-cyano-7-deazaguanine reductase, N-terminal domain	CATH (4.3.0)
K	3.30.1410.10	Alpha Beta	2-Layer Sandwich	Gtp Cyclohydrolase I Feedback Regulatory Protein	Chain: K	CATH (4.3.0)
L	3.30.1410.10	Alpha Beta	2-Layer Sandwich	Gtp Cyclohydrolase I Feedback Regulatory Protein	Chain: K	CATH (4.3.0)
M	3.30.1410.10	Alpha Beta	2-Layer Sandwich	Gtp Cyclohydrolase I Feedback Regulatory Protein	Chain: K	CATH (4.3.0)
N	3.30.1410.10	Alpha Beta	2-Layer Sandwich	Gtp Cyclohydrolase I Feedback Regulatory Protein	Chain: K	CATH (4.3.0)
O	3.30.1410.10	Alpha Beta	2-Layer Sandwich	Gtp Cyclohydrolase I Feedback Regulatory Protein	Chain: K	CATH (4.3.0)
P	3.30.1410.10	Alpha Beta	2-Layer Sandwich	Gtp Cyclohydrolase I Feedback Regulatory Protein	Chain: K	CATH (4.3.0)
Q	3.30.1410.10	Alpha Beta	2-Layer Sandwich	Gtp Cyclohydrolase I Feedback Regulatory Protein	Chain: K	CATH (4.3.0)
R	3.30.1410.10	Alpha Beta	2-Layer Sandwich	Gtp Cyclohydrolase I Feedback Regulatory Protein	Chain: K	CATH (4.3.0)
S	3.30.1410.10	Alpha Beta	2-Layer Sandwich	Gtp Cyclohydrolase I Feedback Regulatory Protein	Chain: K	CATH (4.3.0)
T	3.30.1410.10	Alpha Beta	2-Layer Sandwich	Gtp Cyclohydrolase I Feedback Regulatory Protein	Chain: K	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	PF01227	GTP cyclohydrolase I (GTP_cyclohydroI)	GTP cyclohydrolase I	This family includes GTP cyclohydrolase enzymes and a family of related bacterial proteins including Swiss:Q46920.	Domain
K, L, M, N, O K, L, M, N, O, P, Q, R, S, T	PF06399	GTP cyclohydrolase I feedback regulatory protein (GFRP) (GFRP)	GTP cyclohydrolase I feedback regulatory protein (GFRP)	Tetrahydrobiopterin, the cofactor required for hydroxylation of aromatic amino acids regulates its own synthesis in via feedback inhibition of GTP cyclohydrolase I. This mechanism is mediated by the regulatory subunit called GTP cyclohydrolase I f ...	Tetrahydrobiopterin, the cofactor required for hydroxylation of aromatic amino acids regulates its own synthesis in via feedback inhibition of GTP cyclohydrolase I. This mechanism is mediated by the regulatory subunit called GTP cyclohydrolase I feedback regulatory protein (GFRP) [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	GTP Cyclohydrolase I	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in cyclic amidines GTP cyclohydrolase activity cyclohydrolase activity hydrolase activity GTP cyclohydrolase I activity catalytic activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds GTP-dependent protein binding cation binding ion binding binding calcium ion binding metal ion binding small molecule binding hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in cyclic amidines GTP cyclohydrolase activity cyclohydrolase activity hydrolase activity GTP cyclohydrolase I activity catalytic activity hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds GTP-dependent protein binding protein binding guanyl nucleotide binding GTP binding nucleotide binding guanyl ribonucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding organic cyclic compound binding purine nucleotide binding anion binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding identical protein binding protein homodimerization activity protein dimerization activity protein-containing complex binding kinase binding enzyme binding protein kinase binding mitogen-activated protein kinase binding transition metal ion binding zinc ion binding pyrophosphatase activity GTPase activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity, acting on acid anhydrides	heart process multicellular organismal process system process regulation of biological process regulation of heart contraction regulation of system process biological regulation positive regulation of biological process positive regulation of heart rate positive regulation of blood circulation positive regulation of heart contraction circulatory system process regulation of blood circulation positive regulation of multicellular organismal process heart process multicellular organismal process system process regulation of biological process regulation of heart contraction regulation of system process biological regulation positive regulation of biological process positive regulation of heart rate positive regulation of blood circulation positive regulation of heart contraction circulatory system process regulation of blood circulation positive regulation of multicellular organismal process regulation of multicellular organismal process regulation of biological quality heart contraction blood circulation regulation of heart rate response to stimulus response to stress multicellular organismal response to stress response to pain cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein-containing complex assembly cellular process cellular component organization or biogenesis regulation of blood pressure cellular response to stimulus regulation of cellular process cellular response to oxidative stress detoxification regulation of cellular response to stress reactive oxygen species metabolic process cellular response to chemical stress regulation of cellular response to oxidative stress response to superoxide cellular oxidant detoxification response to inorganic substance cellular response to oxygen radical cellular response to reactive oxygen species cellular response to stress regulation of response to stress regulation of response to oxidative stress cellular detoxification cellular metabolic process response to oxygen-containing compound regulation of superoxide metabolic process regulation of cellular metabolic process cellular response to oxygen-containing compound response to reactive oxygen species regulation of removal of superoxide radicals response to toxic substance superoxide metabolic process removal of superoxide radicals response to oxidative stress cellular response to chemical stimulus regulation of response to stimulus regulation of response to reactive oxygen species response to chemical cellular response to superoxide metabolic process regulation of metabolic process regulation of reactive oxygen species metabolic process cellular response to toxic substance response to oxygen radical neuron apoptotic process positive regulation of programmed cell death regulation of apoptotic process regulation of programmed cell death cell death positive regulation of apoptotic process apoptotic process positive regulation of neuron apoptotic process programmed cell death positive regulation of cellular process regulation of neuron apoptotic process polyol metabolic process organonitrogen compound metabolic process small molecule biosynthetic process organic hydroxy compound metabolic process organonitrogen compound biosynthetic process alcohol metabolic process diol biosynthetic process organic cyclic compound metabolic process organic substance metabolic process diol metabolic process biosynthetic process tetrahydrobiopterin biosynthetic process organic cyclic compound biosynthetic process tetrahydrobiopterin metabolic process organic hydroxy compound biosynthetic process pteridine-containing compound biosynthetic process organic substance biosynthetic process polyol biosynthetic process alcohol biosynthetic process small molecule metabolic process pteridine-containing compound metabolic process dihydrobiopterin metabolic process dopamine metabolic process catechol-containing compound metabolic process amine metabolic process biogenic amine biosynthetic process catecholamine metabolic process amine biosynthetic process dopamine biosynthetic process phenol-containing compound metabolic process catecholamine biosynthetic process phenol-containing compound biosynthetic process catechol-containing compound biosynthetic process biogenic amine metabolic process regulation of tube diameter regulation of tube size vascular process in circulatory system blood vessel diameter maintenance vasodilation regulation of anatomical structure size response to organic substance biological process involved in interspecies interaction between organisms immune response response to other organism defense response response to type II interferon response to cytokine defense response to symbiont response to external stimulus response to biotic stimulus immune system process defense response to other organism innate immune response response to external biotic stimulus positive regulation of organelle organization telomere organization regulation of DNA biosynthetic process positive regulation of macromolecule biosynthetic process RNA-templated DNA biosynthetic process regulation of primary metabolic process nucleobase-containing compound metabolic process telomere maintenance via telomere lengthening positive regulation of metabolic process positive regulation of telomere maintenance via telomere lengthening positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process positive regulation of telomere maintenance positive regulation of nucleobase-containing compound metabolic process primary metabolic process DNA metabolic process regulation of chromosome organization regulation of telomere maintenance via telomere lengthening regulation of organelle organization positive regulation of chromosome organization telomere maintenance positive regulation of DNA metabolic process positive regulation of telomere maintenance via telomerase regulation of macromolecule biosynthetic process macromolecule metabolic process DNA biosynthetic process regulation of DNA metabolic process regulation of telomere maintenance regulation of cellular component organization positive regulation of cellular component organization cellular biosynthetic process positive regulation of cellular metabolic process nucleic acid biosynthetic process positive regulation of biosynthetic process regulation of biosynthetic process telomere maintenance via telomerase chromosome organization positive regulation of DNA biosynthetic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process regulation of telomere maintenance via telomerase regulation of cellular biosynthetic process organelle organization positive regulation of cellular biosynthetic process regulation of cellular senescence negative regulation of metabolic process negative regulation of biological process cellular senescence negative regulation of cellular metabolic process negative regulation of cellular senescence negative regulation of cellular process negative regulation of cardiac muscle cell apoptotic process muscle cell apoptotic process negative regulation of programmed cell death regulation of cardiac muscle cell apoptotic process regulation of muscle cell apoptotic process cardiac muscle cell apoptotic process negative regulation of apoptotic process regulation of striated muscle cell apoptotic process striated muscle cell apoptotic process negative regulation of muscle cell apoptotic process negative regulation of striated muscle cell apoptotic process nervous system process neuromuscular process neuromuscular process controlling posture regulation of lung blood pressure folic acid-containing compound biosynthetic process cellular modified amino acid metabolic process cellular modified amino acid biosynthetic process folic acid-containing compound metabolic process tetrahydrofolate biosynthetic process tetrahydrofolate metabolic process response to lipid response to lipopolysaccharide response to bacterium response to molecule of bacterial origin negative regulation of blood pressure response to tumor necrosis factor	membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle nuclear membrane membrane nucleus endomembrane system organelle envelope nuclear envelope membrane-bounded organelle intracellular organelle intracellular anatomical structure mitochondrion organelle cytoplasm cellular anatomical entity intracellular membrane-bounded organelle nuclear membrane membrane nucleus endomembrane system organelle envelope nuclear envelope organelle membrane cytosol membrane-enclosed lumen intracellular organelle lumen nucleoplasm organelle lumen nuclear lumen protein-containing complex cytoplasmic vesicle intracellular vesicle vesicle
K, L, M, N, O K, L, M, N, O, P, Q, R, S, T	GTP Cyclohydrolase I Feedback Regulatory Protein	GTP-dependent protein binding protein binding binding protein-containing complex binding enzyme regulator activity molecular function inhibitor activity molecular function regulator activity enzyme inhibitor activity GTP cyclohydrolase binding enzyme binding amino acid binding identical protein binding	cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein-containing complex assembly cellular process cellular component organization or biogenesis regulation of biosynthetic process regulation of biological process biosynthetic process negative regulation of biosynthetic process negative regulation of metabolic process biological regulation negative regulation of biological process cellular component organization cellular component biogenesis cellular component assembly protein-containing complex organization protein-containing complex assembly cellular process cellular component organization or biogenesis regulation of biosynthetic process regulation of biological process biosynthetic process negative regulation of biosynthetic process negative regulation of metabolic process biological regulation negative regulation of biological process metabolic process regulation of metabolic process regulation of nitric oxide biosynthetic process reactive nitrogen species metabolic process nitric oxide metabolic process nitric oxide biosynthetic process regulation of nitric oxide metabolic process	membrane-bounded organelle intracellular anatomical structure pigment granule intracellular vesicle cellular anatomical entity intracellular membrane-bounded organelle intracellular organelle melanosome cytoplasmic vesicle organelle cytoplasm vesicle nuclear membrane membrane membrane-bounded organelle intracellular anatomical structure pigment granule intracellular vesicle cellular anatomical entity intracellular membrane-bounded organelle intracellular organelle melanosome cytoplasmic vesicle organelle cytoplasm vesicle nuclear membrane membrane nucleus endomembrane system organelle envelope nuclear envelope organelle membrane cytosol somatodendritic compartment cell projection dendrite dendritic tree neuron projection plasma membrane bounded cell projection protein-containing complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR018234	GTP cyclohydrolase I, conserved site	Conserved Site
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR020602	GTP cyclohydrolase I domain	Domain
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR043133	GTP cyclohydrolase I, C-terminal/NADPH-dependent 7-cyano-7-deazaguanine reductase	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR043134	GTP cyclohydrolase I, N-terminal domain	Homologous Superfamily
A, B, C, D, E A, B, C, D, E, F, G, H, I, J	IPR001474	GTP cyclohydrolase I	Family
K, L, M, N, O K, L, M, N, O, P, Q, R, S, T	IPR036717	GFRP superfamily	Homologous Superfamily
K, L, M, N, O K, L, M, N, O, P, Q, R, S, T	IPR009112	GTP cyclohydrolase I, feedback regulatory protein	Family