Annotations: 5X6C

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	PRK06253	e5x6cB3	A: a+b two layers	X: Alpha-beta plaits	H: O-phosphoseryl-tRNA synthetase C-terminal domain (From Topology)	T: O-phosphoseryl-tRNA synthetase C-terminal domain	F: PRK06253	ECOD (1.6)
B	sepS_1	e5x6cB1	A: a+b two layers	X: SSHS domain	H: SSHS domain in O-phosphoseryl-tRNA synthetase (From Topology)	T: SSHS domain in O-phosphoseryl-tRNA synthetase	F: sepS_1	ECOD (1.6)
B	tRNA-synt_2d	e5x6cB2	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: tRNA-synt_2d	ECOD (1.6)
A	PRK06253	e5x6cA1	A: a+b two layers	X: Alpha-beta plaits	H: O-phosphoseryl-tRNA synthetase C-terminal domain (From Topology)	T: O-phosphoseryl-tRNA synthetase C-terminal domain	F: PRK06253	ECOD (1.6)
A	sepS_1	e5x6cA3	A: a+b two layers	X: SSHS domain	H: SSHS domain in O-phosphoseryl-tRNA synthetase (From Topology)	T: SSHS domain in O-phosphoseryl-tRNA synthetase	F: sepS_1	ECOD (1.6)
A	tRNA-synt_2d	e5x6cA2	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: tRNA-synt_2d	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
C [auth E], D [auth F]	PF09873	SepCysE-like (SepCysE)	SepCysE-like	-	Family
A, B	PF01409	tRNA synthetases class II core domain (F) (tRNA-synt_2d)	tRNA synthetases class II core domain (F)	Other tRNA synthetase sub-families are too dissimilar to be included. This family includes only phenylalanyl-tRNA synthetases. This is the core catalytic domain.	Domain
A, B	PF18006	O-phosphoseryl-tRNA synthetase C-terminal domain (SepRS_C)	O-phosphoseryl-tRNA synthetase C-terminal domain	The SSHS domain is mainly found in Archaea. The domain makes up part of the anticodon binding domain at the C-terminal of O-phosphoserine--tRNA(Cys) ligase [1,2].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
C [auth E], D [auth F]	Uncharacterized protein MJ1481	-	-	-
A, B	O-phosphoserine--tRNA(Cys) ligase	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 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 ligase activity, forming carbon-oxygen bonds aminoacyl-tRNA ligase activity catalytic activity, acting on RNA catalytic activity, acting on a nucleic acid phenylalanine-tRNA ligase activity catalytic activity, acting on a tRNA catalytic activity ligase activity phosphoserine-tRNA(Cys) ligase activity RNA binding tRNA binding nucleic acid binding	amino acid activation tRNA aminoacylation RNA metabolic process primary metabolic process amino acid metabolic process translation gene expression tRNA aminoacylation for protein translation protein biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process tRNA metabolic process nucleobase-containing compound metabolic process biosynthetic process amino acid activation tRNA aminoacylation RNA metabolic process primary metabolic process amino acid metabolic process translation gene expression tRNA aminoacylation for protein translation protein biosynthetic process macromolecule biosynthetic process nucleic acid metabolic process tRNA metabolic process nucleobase-containing compound metabolic process biosynthetic process metabolic process cellular process macromolecule metabolic process protein metabolic process phenylalanyl-tRNA aminoacylation	cellular anatomical structure intracellular anatomical structure cytoplasm

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
C [auth E], D [auth F]	IPR016736	MJ1481-like	Family
A, B	IPR006195	Aminoacyl-tRNA synthetase, class II	Domain
A, B	IPR005246	O-phosphoseryl-tRNA(Cys) ligase	Family
A, B	IPR045864	Class II Aminoacyl-tRNA synthetase/Biotinyl protein ligase (BPL) and lipoyl protein ligase (LPL)	Homologous Superfamily
A, B	IPR002319	Phenylalanyl-tRNA synthetase	Domain
A, B	IPR041590	O-phosphoserine--tRNA(Cys) ligase, C-terminal domain	Domain

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 R01GM157729.