Annotations: 8H98

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth B]	SCOP2B Superfamily	Class II aaRS and biotin synthetases	8035951	3000058	SCOP2B (2022-06-29)
A [auth B]	SCOP2B Superfamily	Class II aaRS ABD-related	8044418	3000465	SCOP2B (2022-06-29)
B [auth A]	SCOP2B Superfamily	Class II aaRS ABD-related	8044418	3000465	SCOP2B (2022-06-29)
B [auth A]	SCOP2B Superfamily	Class II aaRS and biotin synthetases	8035951	3000058	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 [auth B]	PF00587	e8h98B1	A: a+b three layers	X: Class II aaRS and biotin synthetases (From Topology)	H: Class II aaRS and biotin synthetases (From Topology)	T: Class II aaRS and biotin synthetases	F: PF00587	ECOD (1.6)
A [auth B]	PF03129	e8h98B2	A: a/b three-layered sandwiches	X: Anticodon-binding domain of Class II aaRS (From Topology)	H: Anticodon-binding domain of Class II aaRS (From Topology)	T: Anticodon-binding domain of Class II aaRS	F: PF03129	ECOD (1.6)
B [auth A]	PF00587	e8h98A2	A: a+b three layers	X: Class II aaRS and biotin synthetases (From Topology)	H: Class II aaRS and biotin synthetases (From Topology)	T: Class II aaRS and biotin synthetases	F: PF00587	ECOD (1.6)
B [auth A]	PF03129	e8h98A1	A: a/b three-layered sandwiches	X: Anticodon-binding domain of Class II aaRS (From Topology)	H: Anticodon-binding domain of Class II aaRS (From Topology)	T: Anticodon-binding domain of Class II aaRS	F: PF03129	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], B [auth A]	PF03129	Anticodon binding domain (HGTP_anticodon)	Anticodon binding domain	This domain is found in histidyl, glycyl, threonyl and prolyl tRNA synthetases [1] it is probably the anticodon binding domain [2].	Domain
A [auth B], B [auth A]	PF00587	tRNA synthetase class II core domain (G, H, P, S and T) (tRNA-synt_2b)	tRNA synthetase class II core domain (G, H, P, S and T)	tRNA-synt_2b is a family of largely threonyl-tRNA members.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth B], B [auth A]	Threonine--tRNA ligase	ligase activity, forming carbon-oxygen bonds aminoacyl-tRNA ligase activity catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid catalytic activity, acting on a tRNA catalytic activity ligase activity translation regulator activity binding mRNA regulatory element binding translation repressor activity organic cyclic compound binding translation regulator activity, nucleic acid binding nucleic acid binding translation repressor activity ligase activity, forming carbon-oxygen bonds aminoacyl-tRNA ligase activity catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid catalytic activity, acting on a tRNA catalytic activity ligase activity translation regulator activity binding mRNA regulatory element binding translation repressor activity organic cyclic compound binding translation regulator activity, nucleic acid binding nucleic acid binding translation repressor activity RNA binding tRNA binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding identical protein binding protein binding protein homodimerization activity protein dimerization activity threonine-tRNA ligase activity hydrolase activity, acting on ester bonds carboxylic ester hydrolase activity aminoacyl-tRNA editing activity hydrolase activity mRNA 5'-UTR binding mRNA binding cation binding transition metal ion binding zinc ion binding metal ion binding	response to stimulus response to chemical response to antibiotic regulation of cellular process cellular biosynthetic process organonitrogen compound biosynthetic process regulation of primary metabolic process post-transcriptional regulation of gene expression organic substance metabolic process organic substance biosynthetic process protein metabolic process regulation of biosynthetic process regulation of biological process organonitrogen compound metabolic process response to stimulus response to chemical response to antibiotic regulation of cellular process cellular biosynthetic process organonitrogen compound biosynthetic process regulation of primary metabolic process post-transcriptional regulation of gene expression organic substance metabolic process organic substance biosynthetic process protein metabolic process regulation of biosynthetic process regulation of biological process organonitrogen compound metabolic process cellular metabolic process regulation of protein metabolic process biological regulation regulation of cellular metabolic process primary metabolic process regulation of macromolecule metabolic process gene expression translation macromolecule biosynthetic process regulation of cellular biosynthetic process regulation of gene expression biosynthetic process regulation of translation regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process regulation of metabolic process amino acid activation tRNA aminoacylation RNA metabolic process amino acid metabolic process nucleobase-containing compound metabolic process tRNA aminoacylation for protein translation nucleic acid metabolic process tRNA metabolic process organic cyclic compound metabolic process threonyl-tRNA aminoacylation negative regulation of biological process negative regulation of cellular metabolic process negative regulation of translation negative regulation of cellular process translational initiation negative regulation of protein metabolic process negative regulation of macromolecule metabolic process regulation of translational initiation negative regulation of metabolic process negative regulation of translational initiation negative regulation of cellular biosynthetic process negative regulation of gene expression negative regulation of biosynthetic process negative regulation of macromolecule biosynthetic process	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B], B [auth A]	IPR045864	Class II Aminoacyl-tRNA synthetase/Biotinyl protein ligase (BPL) and lipoyl protein ligase (LPL)	Homologous Superfamily
A [auth B], B [auth A]	IPR012947	Threonyl/alanyl tRNA synthetase, SAD	Domain
A [auth B], B [auth A]	IPR004154	Anticodon-binding	Domain
A [auth B], B [auth A]	IPR006195	Aminoacyl-tRNA synthetase, class II	Domain
A [auth B], B [auth A]	IPR002314	Aminoacyl-tRNA synthetase, class II (G/ P/ S/T)	Domain
A [auth B], B [auth A]	IPR036621	Anticodon-binding domain superfamily	Homologous Superfamily
A [auth B], B [auth A]	IPR012675	Beta-grasp domain superfamily	Homologous Superfamily
A [auth B], B [auth A]	IPR002320	Threonine-tRNA ligase, class IIa	Family
A [auth B], B [auth A]	IPR012676	TGS-like	Homologous Superfamily
A [auth B], B [auth A]	IPR033728	Threonine-tRNA ligase catalytic core domain	Domain
A [auth B], B [auth A]	IPR004095	TGS	Domain
A [auth B], B [auth A]	IPR047246	Threonine-tRNA ligase, class IIa, anticodon-binding domain	Domain
A [auth B], B [auth A]	IPR018163	Threonyl/alanyl tRNA synthetase, class II-like, putative editing domain 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.