Annotations: 4CRN

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth P]	PF03144	e4crnP2	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: PF03144	ECOD (1.6)
A [auth P]	PF22594	e4crnP3	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Aminomethyltransferase beta-barrel domain	F: PF22594	ECOD (1.6)
A [auth P]	PF00009	e4crnP1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: P-loop containing nucleoside triphosphate hydrolases	F: PF00009	ECOD (1.6)
B [auth X]	PF03465	e4crnX2	A: a+b three layers	X: Bacillus chorismate mutase-like	H: L30e-like (From Topology)	T: L30e-like	F: PF03465	ECOD (1.6)
B [auth X]	PF03463	e4crnX1	A: a+b three layers	X: N-terminal domain of eukaryotic peptide chain release factor subunit 1, ERF1 (From Topology)	H: N-terminal domain of eukaryotic peptide chain release factor subunit 1, ERF1 (From Topology)	T: N-terminal domain of eukaryotic peptide chain release factor subunit 1, ERF1	F: PF03463	ECOD (1.6)
B [auth X]	PF03464	e4crnX3	A: mixed a+b and a/b	X: Ribonuclease H-like	H: Ribonuclease H-like (From Topology)	T: Ribonuclease H-like	F: PF03464	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth P]	PF00009	Elongation factor Tu GTP binding domain (GTP_EFTU)	Elongation factor Tu GTP binding domain	This domain contains a P-loop motif, also found in several other families such as Pfam:PF00071, Pfam:PF00025 and Pfam:PF00063. Elongation factor Tu consists of three structural domains, this plus two C-terminal beta barrel domains.	Domain
A [auth P]	PF03143	Elongation factor Tu C-terminal domain (GTP_EFTU_D3)	Elongation factor Tu C-terminal domain	Elongation factor Tu consists of three structural domains, this is the third domain. This domain adopts a beta barrel structure. This the third domain is involved in binding to both charged tRNA [1] and binding to EF-Ts Pfam:PF00889 [2].	Domain
A [auth P]	PF03144	Elongation factor Tu domain 2 (GTP_EFTU_D2)	Elongation factor Tu domain 2	Elongation factor Tu consists of three structural domains, this is the second domain. This domain adopts a beta barrel structure. This the second domain is involved in binding to charged tRNA [1]. This domain is also found in other proteins such as e ...	Elongation factor Tu consists of three structural domains, this is the second domain. This domain adopts a beta barrel structure. This the second domain is involved in binding to charged tRNA [1]. This domain is also found in other proteins such as elongation factor G and translation initiation factor IF-2. This domain is structurally related to Pfam:PF03143, and in fact has weak sequence matches to this domain.	Domain
B [auth X]	PF03465	eRF1 domain 3 (eRF1_3)	eRF1 domain 3	The release factor eRF1 terminates protein biosynthesis by recognising stop codons at the A site of the ribosome and stimulating peptidyl-tRNA bond hydrolysis at the peptidyl transferase centre. The crystal structure of human eRF1 is known [1]. The o ...	The release factor eRF1 terminates protein biosynthesis by recognising stop codons at the A site of the ribosome and stimulating peptidyl-tRNA bond hydrolysis at the peptidyl transferase centre. The crystal structure of human eRF1 is known [1]. The overall shape and dimensions of eRF1 resemble a tRNA molecule with domains 1, 2, and 3 of eRF1 corresponding to the anticodon loop, aminoacyl acceptor stem, and T stem of a tRNA molecule, respectively. The position of the essential GGQ motif at an exposed tip of domain 2 suggests that the Gln residue coordinates a water molecule to mediate the hydrolytic activity at the peptidyl transferase centre. A conserved groove on domain 1, 80 A from the GGQ motif, is proposed to form the codon recognition site [1]. This family also includes other proteins for which the precise molecular function is unknown. Many of them are from Archaebacteria. These proteins may also be involved in translation termination but this awaits experimental verification.	Domain
B [auth X]	PF03463	eRF1 domain 1 (eRF1_1)	eRF1 domain 1	The release factor eRF1 terminates protein biosynthesis by recognising stop codons at the A site of the ribosome and stimulating peptidyl-tRNA bond hydrolysis at the peptidyl transferase centre. The crystal structure of human eRF1 is known [1]. The o ...	The release factor eRF1 terminates protein biosynthesis by recognising stop codons at the A site of the ribosome and stimulating peptidyl-tRNA bond hydrolysis at the peptidyl transferase centre. The crystal structure of human eRF1 is known [1]. The overall shape and dimensions of eRF1 resemble a tRNA molecule with domains 1, 2, and 3 of eRF1 corresponding to the anticodon loop, aminoacyl acceptor stem, and T stem of a tRNA molecule, respectively. The position of the essential GGQ motif at an exposed tip of domain 2 suggests that the Gln residue coordinates a water molecule to mediate the hydrolytic activity at the peptidyl transferase centre. A conserved groove on domain 1, 80 A from the GGQ motif, is proposed to form the codon recognition site [1]. This family also includes other proteins for which the precise molecular function is unknown. Many of them are from Archaebacteria. These proteins may also be involved in translation termination but this awaits experimental verification.	Domain
B [auth X]	PF03464	eRF1 domain 2 (eRF1_2)	eRF1 domain 2	The release factor eRF1 terminates protein biosynthesis by recognising stop codons at the A site of the ribosome and stimulating peptidyl-tRNA bond hydrolysis at the peptidyl transferase centre. The crystal structure of human eRF1 is known [1]. The o ...	The release factor eRF1 terminates protein biosynthesis by recognising stop codons at the A site of the ribosome and stimulating peptidyl-tRNA bond hydrolysis at the peptidyl transferase centre. The crystal structure of human eRF1 is known [1]. The overall shape and dimensions of eRF1 resemble a tRNA molecule with domains 1, 2, and 3 of eRF1 corresponding to the anticodon loop, aminoacyl acceptor stem, and T stem of a tRNA molecule, respectively. The position of the essential GGQ motif at an exposed tip of domain 2 suggests that the Gln residue coordinates a water molecule to mediate the hydrolytic activity at the peptidyl transferase centre. A conserved groove on domain 1, 80 A from the GGQ motif, is proposed to form the codon recognition site [1]. This family also includes other proteins for which the precise molecular function is unknown. Many of them are from Archaebacteria. These proteins may also be involved in translation termination but this awaits experimental verification.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth P]	ERF3 IN RIBOSOME BOUND ERF1-ERF3-GDPNP COMPLEX	translation regulator activity binding organic cyclic compound binding translation regulator activity, nucleic acid binding translation release factor activity nucleic acid binding translation termination factor activity translation factor activity, RNA binding RNA binding mRNA binding guanyl nucleotide binding GTP binding nucleotide binding guanyl ribonucleotide binding translation regulator activity binding organic cyclic compound binding translation regulator activity, nucleic acid binding translation release factor activity nucleic acid binding translation termination factor activity translation factor activity, RNA binding RNA binding mRNA binding guanyl nucleotide binding GTP binding nucleotide binding guanyl ribonucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule 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 identical protein binding protein binding	cellular component disassembly organonitrogen compound metabolic process protein-containing complex organization cellular biosynthetic process cellular metabolic process organonitrogen compound biosynthetic process protein-containing complex disassembly primary metabolic process translation gene expression macromolecule biosynthetic process cellular component organization organic substance metabolic process biosynthetic process organic substance biosynthetic process cellular component disassembly organonitrogen compound metabolic process protein-containing complex organization cellular biosynthetic process cellular metabolic process organonitrogen compound biosynthetic process protein-containing complex disassembly primary metabolic process translation gene expression macromolecule biosynthetic process cellular component organization organic substance metabolic process biosynthetic process organic substance biosynthetic process cellular process metabolic process translational termination cellular component organization or biogenesis protein metabolic process macromolecule metabolic process regulation of cellular process negative regulation of biological process negative regulation of cellular metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process positive regulation of metabolic process post-transcriptional regulation of gene expression regulation of RNA metabolic process positive regulation of macromolecule metabolic process regulation of nucleobase-containing compound metabolic process regulation of biological quality RNA catabolic process mRNA catabolic process regulation of biological process positive regulation of nucleobase-containing compound metabolic process negative regulation of metabolic process positive regulation of mRNA metabolic process regulation of cellular metabolic process negative regulation of cellular biosynthetic process nucleobase-containing compound catabolic process positive regulation of RNA metabolic process organic cyclic compound metabolic process regulation of gene expression negative regulation of gene expression negative regulation of macromolecule biosynthetic process nucleic acid catabolic process regulation of macromolecule biosynthetic process regulation of metabolic process nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay catabolic process positive regulation of biological process RNA metabolic process mRNA destabilization macromolecule catabolic process regulation of mRNA catabolic process negative regulation of cellular process negative regulation of macromolecule metabolic process regulation of biosynthetic process RNA destabilization nuclear-transcribed mRNA catabolic process biological regulation regulation of macromolecule metabolic process regulation of catabolic process mRNA metabolic process nucleic acid metabolic process organic cyclic compound catabolic process regulation of cellular biosynthetic process positive regulation of catabolic process regulation of mRNA stability positive regulation of mRNA catabolic process negative regulation of biosynthetic process regulation of RNA stability regulation of mRNA metabolic process organic substance catabolic process	intracellular anatomical structure cytoplasmic ribonucleoprotein granule cellular anatomical entity ribonucleoprotein granule intracellular organelle organelle intracellular non-membrane-bounded organelle cytoplasm supramolecular complex non-membrane-bounded organelle cytoplasmic stress granule protein-containing complex translation release factor complex cytosol
B [auth X]	ERF1 IN RIBOSOME-BOUND ERF1-ERF3-GDPNP COMPLEX	translation release factor activity, codon specific translation regulator activity binding organic cyclic compound binding translation regulator activity, nucleic acid binding translation release factor activity nucleic acid binding translation termination factor activity translation factor activity, RNA binding aminoacyl-tRNA hydrolase activity hydrolase activity, acting on ester bonds catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid carboxylic ester hydrolase activity translation release factor activity, codon specific translation regulator activity binding organic cyclic compound binding translation regulator activity, nucleic acid binding translation release factor activity nucleic acid binding translation termination factor activity translation factor activity, RNA binding aminoacyl-tRNA hydrolase activity hydrolase activity, acting on ester bonds catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid carboxylic ester hydrolase activity hydrolase activity catalytic activity, acting on a tRNA catalytic activity RNA binding sequence-specific mRNA binding mRNA binding	cytoplasmic translational termination cellular biosynthetic process organonitrogen compound biosynthetic process protein-containing complex disassembly cellular component organization organic substance metabolic process organic substance biosynthetic process translational termination cellular component organization or biogenesis protein metabolic process cellular component disassembly organonitrogen compound metabolic process protein-containing complex organization cellular metabolic process cytoplasmic translational termination cellular biosynthetic process organonitrogen compound biosynthetic process protein-containing complex disassembly cellular component organization organic substance metabolic process organic substance biosynthetic process translational termination cellular component organization or biogenesis protein metabolic process cellular component disassembly organonitrogen compound metabolic process protein-containing complex organization cellular metabolic process primary metabolic process translation gene expression macromolecule biosynthetic process biosynthetic process cytoplasmic translation cellular process metabolic process macromolecule metabolic process RNA metabolic process nucleobase-containing compound biosynthetic process DNA-templated transcription termination nucleic acid metabolic process RNA biosynthetic process nucleobase-containing compound metabolic process DNA-templated transcription organic cyclic compound metabolic process nucleic acid biosynthetic process organic cyclic compound biosynthetic process	intracellular anatomical structure cytoplasmic ribonucleoprotein granule cellular anatomical entity ribonucleoprotein granule intracellular organelle organelle intracellular non-membrane-bounded organelle cytoplasm supramolecular complex non-membrane-bounded organelle cytoplasmic stress granule protein-containing complex translation release factor complex cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth P]	IPR003285	Eukaryotic peptide chain release factor GTP-binding subunit	Family
A [auth P]	IPR000795	Translational (tr)-type GTP-binding domain	Domain
A [auth P]	IPR009001	Translation elongation factor EF1A/initiation factor IF2gamma, C-terminal	Homologous Superfamily
A [auth P]	IPR031157	Tr-type G domain, conserved site	Conserved Site
A [auth P]	IPR004161	Translation elongation factor EFTu-like, domain 2	Domain
A [auth P]	IPR009000	Translation protein, beta-barrel domain superfamily	Homologous Superfamily
A [auth P]	IPR004160	Translation elongation factor EFTu/EF1A, C-terminal	Domain
A [auth P]	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
B [auth X]	IPR004403	Peptide chain release factor eRF1/aRF1	Family
B [auth X]	IPR005141	eRF1 domain 2	Domain
B [auth X]	IPR005140	eRF1 domain 1/Pelota-like	Domain
B [auth X]	IPR042226	eRF1, domain 2 superfamily	Homologous Superfamily
B [auth X]	IPR024049	eRF1, domain 1	Homologous Superfamily
B [auth X]	IPR005142	eRF1 domain 3	Domain
B [auth X]	IPR029064	Ribosomal protein eL30-like superfamily	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 R01GM133198.