Entry: P57990 Genes: cysS cysS1 ML0323 Length: 473 aa

Cysteine--tRNA ligase

SYC_MYCLE Mycobacterium leprae (strain TN)
Navigate Overview Model Scores RCSB 1D Mol* Pockets B-Cell Epitopes Function and interactions Ontology and localisation Sequence features and PTMs Evidence and cross-references

Summary

Download FASTA UniProt: P57990 ML Locus: ML0323
Entry P57990
Reviewed reviewed
Entry Name SYC_MYCLE
Gene Names cysS cysS1 ML0323
ML locus tag ML0323
Organism Mycobacterium leprae (strain TN)
Length 473 aa
Mass 52125 Da
Annotation 3.0
Annotation Summary

Evidence and cross-references

PubMed ID 11234002
DOI ID 10.1038/35059006
STRING 272631.gene:17574142;
KEGG mle:ML0323;
eggNOG COG0215;
OrthoDB 9815130at2;
InterPro IPR015803;IPR015273;IPR024909;IPR014729;IPR032678;IPR009080;

Oligomer Models

Best Boltz2 oligomer and local AlphaFold‑3 homooligomer structure models matched to ML0323, with the same model switching, Mol*, Nightingale, pLDDT, PAE, and download functionality as monomers.
Count: 0
No oligomer model entries were found for this record.

Monomer Models

Monomer structure models for ML0323, retaining all existing model selection, Mol*, Nightingale, pLDDT, PAE, and download functionality.
Count: 4
Assembly Method Model Overall Rank Download
Monomer Boltz2 0 0.884198 Download Model
Monomer AlphaFold‑3 1 0.879818 Download Model
Monomer Boltz 0 0.894221 Download Model
Monomer CHAI 2 0.178991 Download Model

Sequence & Feature Viewer

Residue-level feature tracks for the loaded model — pLDDT confidence colouring, mapped annotations, and interactive PAE selection ranges. Drag a region on the heatmap to highlight it here and in Mol*.
RCSB 1D
Sequence viewer will initialise once a structure model is loaded.
Mol* — ML0323

Mol* Structure Viewer

Local mmCIF model display for ML0323 with Mol* controls hidden.
Default: Boltz2
Preparing Boltz2 model 0 for ML0323…
Residue focus: none
Heterooligomer ML IDs / chain selection

PAE Map Panel

Predicted aligned error heatmap for the currently loaded model, when pairwise confidence data are available in the local mmCIF.
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PAE Heatmap
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Scored residue
Aligned residue
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B-cell Epitope Propensity

Per-residue conformational B-cell epitope predictions from DiscoTope-3.0.
Epitope · Loading
Low
Epitope
Residue number Residue type DiscoTope-3.0 score Focus
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Annotation Summary

Function and interactions

EC number 6.1.1.16
Catalytic activity CATALYTIC ACTIVITY: Reaction=tRNA(Cys) + L-cysteine + ATP = L-cysteinyl-tRNA(Cys) + AMP + diphosphate; Xref=Rhea:RHEA:17773, Rhea:RHEA-COMP:9661, Rhea:RHEA-COMP:9679, ChEBI:CHEBI:30616, ChEBI:CHEBI:33019, ChEBI:CHEBI:35235, ChEBI:CHEBI:78442, ChEBI:CHEBI:78517, ChEBI:CHEBI:456215; EC=6.1.1.16;
Binding site BINDING 33; /ligand="Zn(2+)"; /ligand_id="ChEBI:CHEBI:29105"; /evidence="ECO:0000250"; BINDING 211; /ligand="Zn(2+)"; /ligand_id="ChEBI:CHEBI:29105"; /evidence="ECO:0000250"; BINDING 236; /ligand="Zn(2+)"; /ligand_id="ChEBI:CHEBI:29105"; /evidence="ECO:0000250"; BINDING 240; /ligand="Zn(2+)"; /ligand_id="ChEBI:CHEBI:29105"; /evidence="ECO:0000250"; BINDING 270; /ligand="ATP"; /ligand_id="ChEBI:CHEBI:30616"; /evidence="ECO:0000250"
Cofactor COFACTOR: Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000250}; Note=Binds 1 zinc ion per subunit. {ECO:0000250};
Subunit structure SUBUNIT: Monomer. {ECO:0000250}.
Annotation Summary

Ontology and localisation

Gene Ontology (biological process) cysteinyl-tRNA aminoacylation [GO:0006423]
Gene Ontology (cellular component) cytosol [GO:0005829]
Gene Ontology (GO) cytosol [GO:0005829]; ATP binding [GO:0005524]; cysteine-tRNA ligase activity [GO:0004817]; zinc ion binding [GO:0008270]; cysteinyl-tRNA aminoacylation [GO:0006423]
Gene Ontology (molecular function) ATP binding [GO:0005524]; cysteine-tRNA ligase activity [GO:0004817]; zinc ion binding [GO:0008270]
Gene Ontology IDs GO:0004817; GO:0005524; GO:0005829; GO:0006423; GO:0008270
Subcellular location [CC] SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250}.
Protein families Class-I aminoacyl-tRNA synthetase family
Sequence similarities SIMILARITY: Belongs to the class-I aminoacyl-tRNA synthetase family. {ECO:0000305}.
Annotation Summary

Sequence features and PTMs

Chain CHAIN 1..473; /note="Cysteine--tRNA ligase"; /id="PRO_0000159437"
Motif MOTIF 35..45; /note="'HIGH' region"; MOTIF 267..271; /note="'KMSKS' region"