Annotations: 3LSQ

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	tRNA-synt_2b	e3lsqA3	A: alpha bundles	X: beta-Grasp	H: Ubiquitin-related	T: Ubiquitin-like	F: tRNA-synt_2b	ECOD (develop294)
A		e3lsqA4	A: alpha bundles	X: DEATH domain	H: Ten stranded beta/alpha barrel	T: Ten stranded beta/alpha barrel	F:	ECOD (develop294)
B	preSET_CXC	e3lsqB1	A: alpha bundles	X: Rossmann-like	H: Rossmann-related	T: Nucleotide-binding domain	F: preSET_CXC	ECOD (develop294)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.287.40	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Serine-tRNA synthetase, tRNA binding domain	CATH (4.3.0)
A	3.30.930.10	Alpha Beta	2-Layer Sandwich	BirA Bifunctional Protein	domain 2	CATH (4.3.0)
B	1.10.287.40	Mainly Alpha	Orthogonal Bundle	Helix Hairpins	Serine-tRNA synthetase, tRNA binding domain	CATH (4.3.0)
B	3.30.930.10	Alpha Beta	2-Layer Sandwich	BirA Bifunctional Protein	domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	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
A, B	PF02403	Seryl-tRNA synthetase N-terminal domain (Seryl_tRNA_N)	Seryl-tRNA synthetase N-terminal domain	This domain is found associated with the Pfam tRNA synthetase class II domain (Pfam:PF00587) and represents the N-terminal domain of seryl-tRNA synthetase.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Seryl-tRNA synthetase	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 serine-tRNA ligase activity catalytic activity, acting on a nucleic acid catalytic activity, acting on a tRNA catalytic activity ligase activity RNA binding tRNA binding nucleic acid binding	primary metabolic process translation gene expression protein biosynthetic process macromolecule biosynthetic process biosynthetic process cytoplasmic translation metabolic process cellular process protein metabolic process macromolecule metabolic process amino acid activation tRNA aminoacylation RNA metabolic process primary metabolic process translation gene expression protein biosynthetic process macromolecule biosynthetic process biosynthetic process cytoplasmic translation metabolic process cellular process protein metabolic process macromolecule metabolic process amino acid activation tRNA aminoacylation RNA metabolic process amino acid metabolic process tRNA aminoacylation for protein translation nucleic acid metabolic process tRNA metabolic process nucleobase-containing compound metabolic process seryl-tRNA aminoacylation	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure mitochondrion organelle cytoplasm intracellular membrane-bounded organelle cell projection cilium plasma membrane bounded cell projection cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR045864	Class II Aminoacyl-tRNA synthetase/Biotinyl protein ligase (BPL) and lipoyl protein ligase (LPL)	Homologous Superfamily
A, B	IPR042103	Serine-tRNA synthetase, type1, N-terminal domain superfamily	Homologous Superfamily
A, B	IPR002317	Serine-tRNA ligase, type1	Family
A, B	IPR015866	Serine-tRNA synthetase, type1, N-terminal	Domain
A, B	IPR006195	Aminoacyl-tRNA synthetase, class II	Domain
A, B	IPR002314	Aminoacyl-tRNA synthetase, class II (G/ P/ S/T)	Domain
A, B	IPR010978	Class I and II aminoacyl-tRNA synthetase, tRNA-binding arm	Homologous Superfamily
A, B	IPR033729	Serine-tRNA ligase catalytic core 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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.