CARS1
Cysteine--tRNA ligase, cytoplasmic
Also known as: CARS, SYCC_HUMAN
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- P49589
- Gene
- CARS1
- Ensembl
- ENSG00000110619
- Chromosome
- 11
- Canonical length
- 748 aa
- Protein class
- Cancer-related genes, Disease related genes, Enzymes, Human disease related genes, Metabolic proteins, Potential drug targets, Predicted intracellular proteins
- Subcellular location
- Cytosol
- Quaternary structure
- Homodimer
OverviewNCBI Gene
This gene encodes a class 1 aminoacyl-tRNA synthetase, cysteinyl-tRNA synthetase. Each of the twenty aminoacyl-tRNA synthetases catalyzes the aminoacylation of a specific tRNA or tRNA isoaccepting family with the cognate amino acid. This gene is one of several located near the imprinted gene domain on chromosome 11p15.5, an important tumor-suppressor gene region. Alterations in this region have been associated with Beckwith-Wiedemann syndrome, Wilms tumor, rhabdomyosarcoma, adrenocortical carcinoma, and lung, ovarian and breast cancers. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Aug 2010]
Canonical amino-acid sequenceUniProt
748 residues, UniProt reviewed canonical sequence.
>P49589|CARS1
1 MADSSGQQGK GRRVQPQWSP PAGTQPCRLH LYNSLTRNKE VFIPQDGKKV TWYCCGPTVY
61 DASHMGHARS YISFDILRRV LKDYFKFDVF YCMNITDIDD KIIKRARQNH LFEQYREKRP
121 EAAQLLEDVQ AALKPFSVKL NETTDPDKKQ MLERIQHAVQ LATEPLEKAV QSRLTGEEVN
181 SCVEVLLEEA KDLLSDWLDS TLGCDVTDNS IFSKLPKFWE GDFHRDMEAL NVLPPDVLTR
241 VSEYVPEIVN FVQKIVDNGY GYVSNGSVYF DTAKFASSEK HSYGKLVPEA VGDQKALQEG
301 EGDLSISADR LSEKRSPNDF ALWKASKPGE PSWPCPWGKG RPGWHIECSA MAGTLLGASM
361 DIHGGGFDLR FPHHDNELAQ SEAYFENDCW VRYFLHTGHL TIAGCKMSKS LKNFITIKDA
421 LKKHSARQLR LAFLMHSWKD TLDYSSNTME SALQYEKFLN EFFLNVKDIL RAPVDITGQF
481 EKWGEEEAEL NKNFYDKKTA IHKALCDNVD TRTVMEEMRA LVSQCNLYMA ARKAVRKRPN
541 QALLENIALY LTHMLKIFGA VEEDSSLGFP VGGPGTSLSL EATVMPYLQV LSEFREGVRK
601 IAREQKVPEI LQLSDALRDN ILPELGVRFE DHEGLPTVVK LVDRNTLLKE REEKRRVEEE
661 KRKKKEEAAR RKQEQEAAKL AKMKIPPSEM FLSETDKYSK FDENGLPTHD MEGKELSKGQ
721 AKKLKKLFEA QEKLYKEYLQ MAQNGSFQLocalizationUniProt · AlphaFold · HPA
Whether an antibody against CARS1 can act on the native protein depends on physical access: surface and secreted proteins are reachable by circulating antibodies, intracellular proteins usually are not.
- Antibody reachability
- Intracellular
- Secreted
- No
- Transmembrane segments
- 0
- Mean surface accessibility (rSASA)
- 0.28
- Highest tissue expression
- 31 nTPM
Expression across tissuesHPA
Tissue
- pancreas: 31 nTPM
- skeletal muscle: 30 nTPM
- skin: 23 nTPM
- stomach: 22 nTPM
- adipose tissue: 21 nTPM
- cerebral cortex: 21 nTPM
Single-cell type
- late primary spermatocytes: 101 nCPM
- early spermatids: 92 nCPM
- renal collecting duct intercalated cells: 53 nCPM
- respiratory ciliated cells: 49 nCPM
- late spermatids: 48 nCPM
- oligodendrocytes: 45 nCPM
Immune cell
- non-classical monocyte: 38 nTPM
- T-reg: 27 nTPM
- neutrophil: 26 nTPM
- NK-cell: 24 nTPM
- gdT-cell: 21 nTPM
- myeloid DC: 19 nTPM
Brain region
- white matter: 18 nTPM
- cerebral cortex: 18 nTPM
- pons: 17 nTPM
- thalamus: 15 nTPM
- hypothalamus: 15 nTPM
- midbrain: 15 nTPM
DiseaseUniProt · ClinVar · IEDB · PubMed
Four sources answering four different questions about CARS1.
Disease | AllUniProt
Conditions CARS1 is implicated in, by any mechanism.
- Microcephaly, developmental delay, and brittle hair syndrome (MDBH) MIM:618891
Disease | GeneticClinVar
7 pathogenic / likely-pathogenic of 215 ClinVar records.
Conditions with pathogenic or likely-pathogenic variants.
- Microcephaly, developmental delay, and brittle hair syndrome
ReferencesPubMed · IEDB
Publications for CARS1 from three distinct lines of evidence, kept separate because they answer different questions: whether antibodies are directed at the protein, whether a B-cell epitope has been mapped on it, and whether a T-cell epitope has. Each is labelled with its source.
Reference: AutoantibodyPubMed
2 publications
- Mass spectrometry-based identification of new anti-Ly and known antisynthetase autoantibodies.
2023 · Ann Rheum Dis · RCR 3.9 · 28 citations - Two novel anti-aminoacyl tRNA synthetase antibodies: Autoantibodies against cysteinyl-tRNA synthetase and valyl-tRNA synthetase.
2022 · Autoimmun Rev · RCR 1.6 · 15 citations
Sources: PubMed — antigen-level antibody evidence from a custom retrieval. Records matching a controlled set of autoantibody terms (the MeSH descriptors Autoantibodies and Autoantigens, with title and abstract term variants) were obtained through NCBI E-utilities, and their titles and abstracts parsed for constructions that direct an antibody at a named protein rather than for co-occurrence. Captured names were resolved against UniProt nomenclature and each antigen adjudicated individually against the source text. Bibliographic records from PubMed and MeSH, U.S. National Library of Medicine; citation metrics from NIH iCite (Hutchins et al., PLoS Biology 2016). Titles link to PubMed; abstracts are not reproduced here. The NLM does not endorse this analysis.
Genetic constraint and essentialitygnomAD · DepMap
Does the body need this protein intact? Low LOEUF or a strong DepMap dependency means loss or blockade of the protein is likely to be felt.
- gnomAD LOEUF (loss-of-function intolerance)
- 0.49
- gnomAD pLI
- 0
- DepMap mean gene effect
- -1.64
- DepMap dependency class
- pan
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 5% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Biological processes
Molecular functions
- ATP binding
- cysteine-tRNA ligase activity
- identical protein binding
- metal ion binding
- protein homodimerization activity
- tRNA binding
Cellular components
Protein domainsUniProt · Pfam · InterPro
KeywordsUniProt
InteractionsUniProt · HPA
Protein binding partners of CARS1 in the human serome: UniProt-annotated complex subunits plus reported interactors. Each links to its own Seroatlas record.
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads CARS1 as an antibody target. Whether an autoantibody or antibody against CARS1 could matter depends on whether native CARS1 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
CARS1 is annotated as predominantly intracellular. Intracellular proteins are common autoantibody markers, becoming visible to the immune system after cell injury or altered processing, but are usually markers of disease rather than direct drivers.
Annotation status
The present source text does not explicitly label CARS1 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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