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 QNSLocalizationUniProt · 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
- Cysteine-rich flanking region, C-terminal
- Leucine-rich repeat
- Leucine-rich repeat, typical subtype
- Immunoglobulin subtype 2
- Immunoglobulin domain subtype
- Immunoglobulin-like domain
- Immunoglobulin I-set
- Immunoglobulin-like fold
- Leucine-rich repeat domain superfamily
- Immunoglobulin-like domain superfamily
- Leucine-rich repeat and transmembrane domain-containing protein
- Immunoglobulin I-set domain
- Leucine rich repeat
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.
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