Seroatlas · Human Serome Atlas

LARP1B

La-related protein 1B

Also known as: DKFZp434K245, DKFZp686E0316, FLJ10378, LAR1B_HUMAN, LARP2

Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene

Protein identityUniProt · HPA

UniProt accession
Q659C4
Gene
LARP1B
Ensembl
ENSG00000138709
Chromosome
4
Canonical length
914 aa
Protein class
Predicted intracellular proteins
Subcellular location
Cytosol

OverviewNCBI Gene

This gene encodes a protein containing domains found in the La related protein of Drosophila melanogaster. La motif-containing proteins are thought to be RNA-binding proteins, where the La motif and adjacent amino acids fold into an RNA recognition motif. The La motif is also found in proteins unrelated to the La protein. Alternative splicing has been observed at this locus and multiple variants, encoding distinct isoforms, are described. Additional splice variation has been identified but the full-length nature of these transcripts has not been determined. [provided by RefSeq, Jun 2013]

Canonical amino-acid sequenceUniProt

914 residues, UniProt reviewed canonical sequence.

>Q659C4|LARP1B
     1  MENWPTPSEL VNTGFQSVLS QGNKKPQNRK EKEEKVEKRS NSDSKENRET KLNGPGENVS
    61  EDEAQSSNQR KRANKHKWVP LHLDVVRSES QERPGSRNSS RCQPEANKPT HNNRRNDTRS
   121  WKRDREKRDD QDDVSSVRSE GGNIRGSFRG RGRGRGRGRG RGRGNPRLNF DYSYGYQEHG
   181  ERTDQPFQTE LNTSMMYYYD DGTGVQVYPV EEALLKEYIK RQIEYYFSVE NLERDFFLRG
   241  KMDEQGFLPI SLIAGFQRVQ ALTTNLNLIL EALKDSTEVE IVDEKMRKKI EPEKWPIPGP
   301  PPRSVPPTDF SQLIDCPEFV PGQAFCSHTE SAPNSPRIGS PLSPKKNSET SILQAMSRGL
   361  STSLPDLDSE PWIEVKKRHQ PAPVKLRESV SVPEGSLNQL CSSEEPEQEE LDFLFDEEIE
   421  QIGRKNTFTD WSDNDSDYEI DDQDLNKILI VTQTPPYVKK HPGGDRTGTH MSRAKITSEL
   481  AKVINDGLYY YEQDLWMEED ENKHTAIKQE VENFKKLNLI SKEQFENLTP ELPFEPNQEV
   541  PVAPSQSRQG GVQGVLHIPK KDLTDELAQK LFDVSEITSA AMVHSLPTAV PESPRIHPTR
   601  TPKTPRTPRL QDPNKTPRFY PVVKEPKAID VKSPRKRKTR HSTNPPLECH VGWVMDSRDR
   661  GPGTSSVSTS NASPSEGAPL AGSYGCTPHS FPKFQHPSHE LLKENGFTQQ VYHKYRRRCL
   721  SERKRLGIGQ SQEMNTLFRF WSFFLRDHFN KKMYEEFRQL AWEDAKENYR YGLECLFRFY
   781  SYGLEKKFRR EIFQDFQEET KKDYESGQLY GLEKFWAYLK YSQSKTQSID PKLQEYLCSF
   841  KRLEDFRVDP PISDEFGRKR HSSTSGEESN RHRLPPNSST KPPNAAKPTS TSELQVPINS
   901  PRRNISPESS DNSH

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against LARP1B 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)
0.56
Highest tissue expression
46 nTPM

Expression across tissuesHPA

Tissue

  • liver: 46 nTPM
  • testis: 45 nTPM
  • pancreas: 34 nTPM
  • epididymis: 22 nTPM
  • skeletal muscle: 18 nTPM
  • rectum: 15 nTPM

Single-cell type

  • late spermatids: 745 nCPM
  • early spermatids: 613 nCPM
  • late primary spermatocytes: 570 nCPM
  • gonadotrophs: 354 nCPM
  • hepatocytes: 276 nCPM
  • epididymal principal cells: 271 nCPM

Immune cell

  • plasmacytoid DC: 4.6 nTPM
  • MAIT T-cell: 3.1 nTPM
  • NK-cell: 2.6 nTPM
  • myeloid DC: 2.4 nTPM
  • memory CD8 T-cell: 2.2 nTPM
  • classical monocyte: 2.1 nTPM

Brain region

  • cerebellum: 31 nTPM
  • cerebral cortex: 30 nTPM
  • white matter: 30 nTPM
  • hypothalamus: 26 nTPM
  • basal ganglia: 25 nTPM
  • amygdala: 24 nTPM

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)
0.69
gnomAD pLI
0
gnomAD missense Z
0.52
DepMap mean gene effect
0.13
DepMap dependency class
selective

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 4% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).

OntologyGO

Biological processes

Molecular functions

Cellular components

Protein domainsUniProt · Pfam · InterPro

KeywordsUniProt

Antibody and autoantibody relevanceSeroatlas analysis

Seroatlas reads LARP1B as an antibody target. Whether an autoantibody or antibody against LARP1B could matter depends on whether native LARP1B is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

LARP1B 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 LARP1B as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/LARP1B. Study-independent annotations aggregated from UniProt, Human Protein Atlas, PubMed, IEDB, Pfam, InterPro, Gene Ontology, AlphaFold, gnomAD, DepMap, ClinVar, TCGA. Catalog release seroatlas-reviewed-human-uniprot-20260313.

Seroatlas is the reference for exploring autoantibody and antibody serology at the human-protein level: the autoreactome and human serome, multiplex serology (HuProt, HuScan, VirScan, PhIP-Seq).

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