Seroatlas · Human Serome Atlas

LRRN2

Leucine-rich repeat neuronal protein 2

Also known as: FIGLER7, GAC1, LRANK1, LRRN2_HUMAN, LRRN5

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

Protein identityUniProt · HPA

UniProt accession
O75325
Gene
LRRN2
Ensembl
ENSG00000170382
Chromosome
1
Canonical length
713 aa
Protein class
Predicted membrane proteins
Subcellular location
Endoplasmic reticulum

OverviewNCBI Gene

The protein encoded by this gene belongs to the leucine-rich repeat superfamily. This gene was found to be amplified and overexpressed in malignant gliomas. The encoded protein has homology with other proteins that function as cell-adhesion molecules or as signal transduction receptors and is a candidate for the target gene in the 1q32.1 amplicon in malignant gliomas. Two alternatively spliced transcript variants encoding the same protein have been described for this gene. [provided by RefSeq, Jul 2008]

Canonical amino-acid sequenceUniProt

713 residues, UniProt reviewed canonical sequence.

>O75325|LRRN2
     1  MRLLVAPLLL AWVAGATAAV PVVPWHVPCP PQCACQIRPW YTPRSSYREA TTVDCNDLFL
    61  TAVPPALPAG TQTLLLQSNS IVRVDQSELG YLANLTELDL SQNSFSDARD CDFHALPQLL
   121  SLHLEENQLT RLEDHSFAGL ASLQELYLNH NQLYRIAPRA FSGLSNLLRL HLNSNLLRAI
   181  DSRWFEMLPN LEILMIGGNK VDAILDMNFR PLANLRSLVL AGMNLREISD YALEGLQSLE
   241  SLSFYDNQLA RVPRRALEQV PGLKFLDLNK NPLQRVGPGD FANMLHLKEL GLNNMEELVS
   301  IDKFALVNLP ELTKLDITNN PRLSFIHPRA FHHLPQMETL MLNNNALSAL HQQTVESLPN
   361  LQEVGLHGNP IRCDCVIRWA NATGTRVRFI EPQSTLCAEP PDLQRLPVRE VPFREMTDHC
   421  LPLISPRSFP PSLQVASGES MVLHCRALAE PEPEIYWVTP AGLRLTPAHA GRRYRVYPEG
   481  TLELRRVTAE EAGLYTCVAQ NLVGADTKTV SVVVGRALLQ PGRDEGQGLE LRVQETHPYH
   541  ILLSWVTPPN TVSTNLTWSS ASSLRGQGAT ALARLPRGTH SYNITRLLQA TEYWACLQVA
   601  FADAHTQLAC VWARTKEATS CHRALGDRPG LIAILALAVL LLAAGLAAHL GTGQPRKGVG
   661  GRRPLPPAWA FWGWSAPSVR VVSAPLVLPW NPGRKLPRSS EGETLLPPLS QNS

LocalizationUniProt · AlphaFold · HPA

Whether an antibody against LRRN2 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
Cell surface
Secreted
No
Transmembrane segments
1
Mean surface accessibility (rSASA)
0.32
Highest tissue expression
20 nTPM

Expression across tissuesHPA

Tissue

  • choroid plexus: 20 nTPM
  • basal ganglia: 16 nTPM
  • hypothalamus: 15 nTPM
  • cerebral cortex: 14 nTPM
  • parathyroid gland: 14 nTPM
  • kidney: 13 nTPM

Single-cell type

  • choroid plexus epithelial cells: 177 nCPM
  • retinal horizontal cells: 174 nCPM
  • corticotrophs: 94 nCPM
  • renal connecting tubule cells: 90 nCPM
  • ependymal cells: 89 nCPM
  • gonadotrophs: 88 nCPM

Immune cell

  • basophil: 0.3 nTPM
  • classical monocyte: 0 nTPM
  • eosinophil: 0 nTPM
  • gdT-cell: 0 nTPM
  • intermediate monocyte: 0 nTPM
  • MAIT T-cell: 0 nTPM

Brain region

  • choroid plexus: 50 nTPM
  • hippocampal formation: 49 nTPM
  • hypothalamus: 48 nTPM
  • cerebral cortex: 46 nTPM
  • amygdala: 44 nTPM
  • basal ganglia: 44 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)
0.43
gnomAD pLI
0.78
gnomAD missense Z
1.89
DepMap mean gene effect
-0.04
DepMap dependency class
selective

Cancer expressionTCGA

Across TCGA tumor cohorts, this protein is over-expressed in roughly 6% 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 LRRN2 as an antibody target. Whether an autoantibody or antibody against LRRN2 could matter depends on whether native LRRN2 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.

LRRN2 is annotated at the cell surface, where native LRRN2 is exposed to circulating antibodies and is a prime autoantibody target that could block, deplete, or overstimulate it.

Annotation status

The present source text does not explicitly label LRRN2 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.

Canonical record: https://seroatlas.com/gene/LRRN2. 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).

Loading the interactive Seroatlas protein explorer...