LRRC4B

gene
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Also known as DKFZp761A179HSMNGL-3

Summary

LRRC4B (leucine rich repeat containing 4B, HGNC:25042) is a protein-coding gene on chromosome 19q13.33, encoding Leucine-rich repeat-containing protein 4B (Q9NT99). Synaptic adhesion protein.

Predicted to enable signaling receptor binding activity. Predicted to be involved in regulation of synapse assembly and synaptic membrane adhesion. Predicted to be located in cerebellar mossy fiber and presynaptic membrane. Predicted to be active in glutamatergic synapse and postsynaptic density membrane.

Source: NCBI Gene 94030 — RefSeq curated summary.

At a glance

  • GWAS associations: 1
  • Clinical variants (ClinVar): 75 total
  • MANE Select transcript: NM_001080457

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:25042
Approved symbolLRRC4B
Nameleucine rich repeat containing 4B
Location19q13.33
Locus typegene with protein product
StatusApproved
AliasesDKFZp761A179, HSM, NGL-3
Ensembl geneENSG00000131409
Ensembl biotypeprotein_coding
Entrez94030

Gene structure

Transcript identifiers

Ensembl transcripts: 9 — 9 protein_coding

ENST00000389201, ENST00000599957, ENST00000600381, ENST00000652263, ENST00000903737, ENST00000903738, ENST00000903739, ENST00000940244, ENST00000940245

RefSeq mRNA: 2 — MANE Select: NM_001080457 NM_001080457, NM_001348568

CCDS: CCDS42595

Canonical transcript exons

ENST00000652263 — 3 exons

ExonStartEnd
ENSE000038501615056794450568435
ENSE000038900315054854250548873
ENSE000038945625051689250519415

Expression profiles

Bgee: expression breadth ubiquitous, 164 present calls, max score 96.66.

FANTOM5 (CAGE): breadth broad, TPM avg 7.0232 / max 223.0532, expressed in 450 samples.

FANTOM5 promoters (4 alternative TSS)

Promoter IDTPM avgSamples expressed
1822365.7187424
1822371.1268327
1822300.171968
1822280.00591

Top tissues by expression

251 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
cortical plateUBERON:000534396.66gold quality
right frontal lobeUBERON:000281096.31gold quality
ventricular zoneUBERON:000305396.07gold quality
Brodmann (1909) area 9UBERON:001354095.79gold quality
anterior cingulate cortexUBERON:000983595.51gold quality
ganglionic eminenceUBERON:000402395.43gold quality
prefrontal cortexUBERON:000045195.19gold quality
amygdalaUBERON:000187695.06gold quality
right hemisphere of cerebellumUBERON:001489094.88gold quality
hypothalamusUBERON:000189894.78gold quality
C1 segment of cervical spinal cordUBERON:000646994.33gold quality
nucleus accumbensUBERON:000188294.28gold quality
cerebellar hemisphereUBERON:000224594.09gold quality
cerebellar cortexUBERON:000212994.03gold quality
putamenUBERON:000187493.68gold quality
caudate nucleusUBERON:000187393.04gold quality
cerebellumUBERON:000203792.72gold quality
frontal cortexUBERON:000187092.21gold quality
spinal cordUBERON:000224092.11gold quality
neocortexUBERON:000195092.06gold quality
dorsolateral prefrontal cortexUBERON:000983492.01gold quality
endocervixUBERON:000045889.96gold quality
forebrainUBERON:000189089.68gold quality
brainUBERON:000095589.46gold quality
cerebral cortexUBERON:000095689.46gold quality
Ammon’s hornUBERON:000195488.28gold quality
substantia nigraUBERON:000203887.98gold quality
adenohypophysisUBERON:000219687.92gold quality
pituitary glandUBERON:000000786.00gold quality
midbrainUBERON:000189185.75gold quality

Single-cell (SCXA)

Detected in 1 experiment(s), a significant marker in 0.

ExperimentMarker?Max mean expression
E-ANND-3no0.78

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

59 targeting LRRC4B, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-4283100.0066.422097
HSA-MIR-55999.9572.283609
HSA-MIR-548AB99.9571.313488
HSA-MIR-185-3P99.9567.011743
HSA-MIR-548A-5P99.9471.273482
HSA-MIR-548AD-5P99.9471.233502
HSA-MIR-548AE-5P99.9471.233502
HSA-MIR-548AK99.9471.243488
HSA-MIR-548AM-5P99.9471.243488
HSA-MIR-548AP-5P99.9471.143489
HSA-MIR-548AQ-5P99.9471.343426
HSA-MIR-548AR-5P99.9471.283515
HSA-MIR-548AS-5P99.9471.223482
HSA-MIR-548AU-5P99.9471.243488
HSA-MIR-548AY-5P99.9471.233502
HSA-MIR-548B-5P99.9471.233502
HSA-MIR-548BB-5P99.9471.273509
HSA-MIR-548C-5P99.9471.243488
HSA-MIR-548D-5P99.9471.233502
HSA-MIR-548H-5P99.9471.243488
HSA-MIR-548I99.9471.253481
HSA-MIR-548J-5P99.9471.143489
HSA-MIR-548O-5P99.9471.243488
HSA-MIR-548W99.9471.243488
HSA-MIR-548Y99.9471.283514
HSA-MIR-449299.8768.253611
HSA-MIR-3151-5P99.8663.831069
HSA-MIR-4728-5P99.8569.394718
HSA-MIR-444799.8567.812900
HSA-MIR-6785-5P99.8268.684428

Cross-species orthologs

4 orthologs

OrganismSymbolGene ID
danio_reriolrrc4baENSDARG00000004597
danio_reriolrrc4bbENSDARG00000014792
mus_musculusLrrc4bENSMUSG00000047085
rattus_norvegicusLrrc4bENSRNOG00000019418

Paralogs (22): DCN (ENSG00000011465), RTN4R (ENSG00000040608), ASPN (ENSG00000106819), FLRT3 (ENSG00000125848), FLRT1 (ENSG00000126500), LRRC4 (ENSG00000128594), PODNL1 (ENSG00000132000), LRTM1 (ENSG00000144771), LRRC4C (ENSG00000148948), LRRTM1 (ENSG00000162951), LRRC15 (ENSG00000172061), PODN (ENSG00000174348), LRRTM4 (ENSG00000176204), BGN (ENSG00000182492), LRRC19 (ENSG00000184434), FLRT2 (ENSG00000185070), GP1BA (ENSG00000185245), RTN4RL1 (ENSG00000185924), RTN4RL2 (ENSG00000186907), NYX (ENSG00000188937), LRRC66 (ENSG00000188993), LRRTM3 (ENSG00000198739)

Protein

Protein identifiers

Leucine-rich repeat-containing protein 4BQ9NT99 (reviewed: Q9NT99)

Alternative names: Netrin-G3 ligand

All UniProt accessions (2): Q9NT99, M0R2G0

UniProt curated annotations — full annotation on UniProt →

Function. Synaptic adhesion protein. Regulates the formation of excitatory synapses. The trans-synaptic adhesion between LRRC4B and PTPRF regulates the formation of excitatory synapses in a bidirectional manner.

Subunit / interactions. Interacts with PTPRF. Interacts with DLG4.

Subcellular location. Membrane. Presynaptic cell membrane.

Post-translational modifications. N-glycosylated. O-glycosylated; contains sialic acid.

Domain organisation. The last 4 C-terminal residues bind to the first 2 PDZ domains of DLG4.

RefSeq proteins (2): NP_001073926, NP_001335497 (=MANE)

Domains & families (InterPro)

IDNameType
IPR000372LRRNTDomain
IPR000483Cys-rich_flank_reg_CDomain
IPR001611Leu-rich_rptRepeat
IPR003591Leu-rich_rpt_typical-subtypRepeat
IPR003598Ig_sub2Domain
IPR003599Ig_subDomain
IPR007110Ig-like_domDomain
IPR013098Ig_I-setDomain
IPR013783Ig-like_foldHomologous_superfamily
IPR032675LRR_dom_sfHomologous_superfamily
IPR036179Ig-like_dom_sfHomologous_superfamily
IPR050541LRR_TM_domain-containingFamily

Pfam: PF00560, PF07679, PF13855

UniProt features (33 total): repeat 9, glycosylation site 9, domain 3, region of interest 2, compositionally biased region 2, topological domain 2, signal peptide 1, chain 1, modified residue 1, transmembrane region 1, disulfide bond 1, sequence conflict 1

Structure

Experimental structures (PDB)

0 structures.

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q9NT99-F173.360.54

Functional residue map

Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.

Post-translational modifications (1): 693

Disulfide bonds (1): 385–436

Glycosylation sites (9): 224, 283, 333, 374, 400, 422, 425, 444, 452

Function

Pathways and Gene Ontology

Reactome pathways

3 pathways

IDPathway
R-HSA-388844Receptor-type tyrosine-protein phosphatases
R-HSA-112316Neuronal System
R-HSA-6794362Protein-protein interactions at synapses

MSigDB gene sets: 104 (showing top): GOBP_SYNAPSE_ASSEMBLY, GOBP_POSITIVE_REGULATION_OF_SYNAPSE_ASSEMBLY, GOBP_REGULATION_OF_CELL_JUNCTION_ASSEMBLY, GOBP_REGULATION_OF_NERVOUS_SYSTEM_DEVELOPMENT, GOBP_REGULATION_OF_CELLULAR_COMPONENT_BIOGENESIS, GOBP_POSITIVE_REGULATION_OF_NERVOUS_SYSTEM_DEVELOPMENT, GOBP_CELL_CELL_ADHESION, GOBP_POSITIVE_REGULATION_OF_CELLULAR_COMPONENT_BIOGENESIS, GOBP_CELL_JUNCTION_ORGANIZATION, GOBP_REGULATION_OF_SYNAPSE_ASSEMBLY, GOBP_POSITIVE_REGULATION_OF_CELL_JUNCTION_ASSEMBLY, GOBP_ORGANELLE_ASSEMBLY, GOBP_REGULATION_OF_SYNAPSE_STRUCTURE_OR_ACTIVITY, GOBP_CELL_JUNCTION_ASSEMBLY, GOCC_NEURON_PROJECTION

GO Biological Process (4): positive regulation of synapse assembly (GO:0051965), regulation of postsynaptic density assembly (GO:0099151), synaptic membrane adhesion (GO:0099560), regulation of presynapse assembly (GO:1905606)

GO Molecular Function (3): signaling receptor binding (GO:0005102), cell-cell adhesion mediator activity (GO:0098632), protein binding (GO:0005515)

GO Cellular Component (8): plasma membrane (GO:0005886), presynaptic membrane (GO:0042734), cerebellar mossy fiber (GO:0044300), postsynaptic density membrane (GO:0098839), glutamatergic synapse (GO:0098978), membrane (GO:0016020), cell projection (GO:0042995), synapse (GO:0045202)

Reactome top-level categories

Rollup of top-2 pathways:

CategoryPathways
Protein-protein interactions at synapses1
Neuronal System1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
regulation of synapse assembly2
cell-cell adhesion2
cellular anatomical structure2
synapse assembly1
positive regulation of nervous system development1
positive regulation of cell junction assembly1
postsynaptic density assembly1
regulation of postsynaptic specialization assembly1
regulation of excitatory synapse assembly1
regulation of postsynaptic density organization1
synapse organization1
presynapse assembly1
regulation of presynapse organization1
protein binding1
cell adhesion mediator activity1
binding1
membrane1
cell periphery1
synaptic membrane1
presynapse1
axon1
postsynaptic density1
postsynaptic membrane1
postsynaptic specialization membrane1
synapse1
cell junction1

Protein interactions and networks

STRING

2096 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
LRRC4BPTPRSQ13332978
LRRC4BPTPRFP10586817
LRRC4BNTNG2Q96CW9765
LRRC4BNTNG1Q9Y2I2751
LRRC4BIL1RAPL1Q9NZN1697
LRRC4BDLG4P78352652
LRRC4BNLGN1Q8N2Q7587
LRRC4BIL1RAPQ9NPH3574
LRRC4BNRXN2Q9P2S2557
LRRC4BNRXN1Q9ULB1557
LRRC4BNLGN2Q8NFZ4538
LRRC4BFN1P02751481
LRRC4BNLGN4XQ8N0W4456
LRRC4BZNF562Q6V9R5453
LRRC4BPTPDC1A2A3K4452

IntAct

143 interactions, top by confidence:

ABTypeScore
KLRG2GLRX3psi-mi:“MI:0914”(association)0.640
LRRC4BSNTG1psi-mi:“MI:0407”(direct interaction)0.590
KLRG2GXYLT2psi-mi:“MI:0914”(association)0.530
LRRC4CDVL2psi-mi:“MI:0914”(association)0.530
TAFA4NRP1psi-mi:“MI:0914”(association)0.530
LGALS1PODXLpsi-mi:“MI:0914”(association)0.530
CCT8L2ACSL4psi-mi:“MI:0914”(association)0.530
CD53FAM171A2psi-mi:“MI:0914”(association)0.530
LRRC4BMAST2psi-mi:“MI:0407”(direct interaction)0.440
LRRC4BSNX27psi-mi:“MI:0407”(direct interaction)0.440
LRRC4BPDZD7psi-mi:“MI:0407”(direct interaction)0.440
LRRC4BWHRNpsi-mi:“MI:0407”(direct interaction)0.440
LRRC4BRHPN1psi-mi:“MI:0407”(direct interaction)0.440
LRRC4BSNTB1psi-mi:“MI:0407”(direct interaction)0.440
LRRC4BPDZK1psi-mi:“MI:0407”(direct interaction)0.440
SCRIBLRRC4Bpsi-mi:“MI:0407”(direct interaction)0.440
LRRC4BSCRIBpsi-mi:“MI:0407”(direct interaction)0.440
LRRC4BSNTG2psi-mi:“MI:0407”(direct interaction)0.440
LRRC4BPTPN3psi-mi:“MI:0407”(direct interaction)0.440
LRRC4BSNTA1psi-mi:“MI:0407”(direct interaction)0.440
LRRC4BDLG3psi-mi:“MI:0407”(direct interaction)0.440
LRRC4BDLG1psi-mi:“MI:0407”(direct interaction)0.440
LRRC4BSYNJ2BPpsi-mi:“MI:0407”(direct interaction)0.440
LRRC4BDLG4psi-mi:“MI:0407”(direct interaction)0.440
LRRC4BDLG2psi-mi:“MI:0407”(direct interaction)0.440
LRRC4BARHGEF12psi-mi:“MI:0407”(direct interaction)0.440
MAGI3LRRC4Bpsi-mi:“MI:0407”(direct interaction)0.440

BioGRID (20): LRRC4B (Two-hybrid), LRRC4B (Affinity Capture-MS), LRRC4B (Affinity Capture-MS), LRRC4B (Affinity Capture-MS), LRRC4B (Affinity Capture-MS), LRRC4B (Proximity Label-MS), LRRC4B (Affinity Capture-MS), LRRC4B (Affinity Capture-MS), LRRC4B (Affinity Capture-MS), LRRC4B (Affinity Capture-MS), LRRC4B (Affinity Capture-MS), LRRC4B (Affinity Capture-MS), LRRC4B (Affinity Capture-MS), LRRC4B (Affinity Capture-MS), LRRC4B (Affinity Capture-MS)

ESM2 similar proteins: A1A5X2, A2RT62, A3KMV1, A4IIK1, B3FL73, F4HX15, P0C192, P0C5J9, P0CC10, Q09299, Q17R01, Q2T9W8, Q32KX5, Q32PG9, Q38SD2, Q3TX51, Q3UHC2, Q3V1N1, Q3ZBA7, Q4G017, Q570C0, Q5BJ29, Q5MJ12, Q65XV2, Q6GLE8, Q6P7W2, Q80TM9, Q86V97, Q86X40, Q8BFZ4, Q8BID8, Q8C4V4, Q8N1E6, Q8N461, Q8TBC3, Q8W104, Q8WVZ9, Q96ME1, Q9EPX5, Q9LW29

Diamond homologs: A1KZ92, A2AJ76, A2ASS6, A4IGL7, A4IIW9, A8WGA3, B0BNK7, B4JEF2, D2HFT7, D3YXG0, D4A1J9, D4ABX8, F1NY98, G5EG78, O01761, O42414, O55005, O88280, O89026, P0C192, P0C5E3, P0C6S8, P0C7J6, P0CC10, P11799, P12960, P14781, P20241, P32004, P82987, P97685, Q03696, Q0E9H9, Q12860, Q149C3, Q15746, Q1RMS4, Q28106, Q2WF71, Q3KNY0

SIGNOR signaling

2 interactions.

AEffectBMechanism
PTPRF“up-regulates activity”LRRC4Bbinding
LRRC4B“up-regulates activity”DLG4binding

Enriched among interaction partners

Reactome pathways and GO biological processes over-represented among this gene’s 113 IntAct physical interaction partners (hypergeometric vs the genome-wide background, BH-FDR, gene-set size 15–500, ranked by fold). A functional readout of the neighbourhood — distinct from this gene’s own memberships above, and biased toward well-studied / hub proteins, so read it as themes rather than proof.

Reactome pathways:

PathwayPartnersFoldFDR
Ras activation upon Ca2+ influx through NMDA receptor539.6×8e-06
Unblocking of NMDA receptors, glutamate binding and activation537.8×8e-06
Negative regulation of NMDA receptor-mediated neuronal transmission537.8×8e-06
Long-term potentiation533.0×1e-05
Assembly and cell surface presentation of NMDA receptors931.7×9e-10
Neurexins and neuroligins1027.4×6e-10
Protein-protein interactions at synapses622.1×1e-05

GO biological processes:

GO termPartnersFoldFDR
establishment or maintenance of epithelial cell apical/basal polarity948.4×8e-11
receptor clustering846.2×1e-09
protein localization to synapse642.6×7e-07
regulation of postsynaptic membrane neurotransmitter receptor levels627.5×8e-06
cell-cell adhesion1211.3×2e-07
protein-containing complex assembly77.4×2e-03

Disease & clinical

Clinical variants and AI predictions

ClinVar

75 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance70
Likely benign3
Benign0

Top pathogenic / likely-pathogenic (0)

SpliceAI

674 predictions. Top by Δscore:

VariantEffectΔscore
19:50519412:TCAC:Tacceptor_gain1.0000
19:50519412:TCACC:Tacceptor_loss1.0000
19:50519413:CAC:Cacceptor_gain1.0000
19:50519413:CACC:Cacceptor_gain1.0000
19:50519413:CACCT:Cacceptor_loss1.0000
19:50519414:AC:Aacceptor_gain1.0000
19:50519414:ACCTG:Aacceptor_loss1.0000
19:50519415:CC:Cacceptor_gain1.0000
19:50519416:C:Aacceptor_loss1.0000
19:50519416:C:CCacceptor_gain1.0000
19:50519417:T:Gacceptor_loss1.0000
19:50519411:ATCAC:Aacceptor_gain0.9900
19:50548538:ATAC:Adonor_loss0.9900
19:50548539:TA:Tdonor_loss0.9900
19:50548869:GGGGG:Gacceptor_gain0.9900
19:50548870:GGGG:Gacceptor_gain0.9900
19:50548871:GGG:Gacceptor_gain0.9900
19:50548871:GGGC:Gacceptor_loss0.9900
19:50548872:GG:Gacceptor_gain0.9900
19:50548874:C:Aacceptor_loss0.9900
19:50548874:C:CCacceptor_gain0.9900
19:50548880:G:Cacceptor_gain0.9900
19:50548880:G:GCacceptor_gain0.9900
19:50548540:A:ACdonor_gain0.9800
19:50548541:C:CCdonor_gain0.9800
19:50548876:G:Cacceptor_gain0.9800
19:50550879:CCT:Cdonor_gain0.9700
19:50548872:GGC:Gacceptor_gain0.9600
19:50548873:GCT:Gacceptor_gain0.9600
19:50519416:C:Tacceptor_gain0.9500

AlphaMissense

4600 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
19:50517935:A:GL593P1.000
19:50517935:A:TL593H1.000
19:50517938:A:CM592R1.000
19:50517938:A:TM592K1.000
19:50517944:G:TA590E1.000
19:50517947:G:TA589D1.000
19:50517950:A:CM588R1.000
19:50517950:A:TM588K1.000
19:50517956:G:CT586R1.000
19:50517956:G:TT586K1.000
19:50517962:G:TA584D1.000
19:50517965:A:TV583E1.000
19:50517971:C:TC581Y1.000
19:50517972:A:GC581R1.000
19:50517974:C:TG580D1.000
19:50517975:C:GG580R1.000
19:50517977:A:TI579N1.000
19:50517980:A:TI578N1.000
19:50517983:A:CI577S1.000
19:50517983:A:GI577T1.000
19:50518361:A:GL451P1.000
19:50518361:A:TL451H1.000
19:50518367:G:TA449D1.000
19:50518368:C:GA449P1.000
19:50518374:C:GA447P1.000
19:50518385:C:AG443V1.000
19:50518385:C:TG443D1.000
19:50518386:C:AG443C1.000
19:50518386:C:GG443R1.000
19:50518393:G:CN440K1.000

dbSNP variants (sampled 300 via entrez): RS1000024028 (19:50561654 G>C), RS1000075005 (19:50536620 C>A), RS1000124730 (19:50520485 C>T), RS1000131747 (19:50556485 C>G,T), RS1000181976 (19:50551630 G>A), RS1000220391 (19:50566487 G>A), RS1000318862 (19:50525295 G>A), RS1000404449 (19:50559168 C>T), RS1000409930 (19:50547019 T>C), RS1000425406 (19:50523599 G>T), RS1000540291 (19:50541479 C>G,T), RS1000585413 (19:50556819 G>A,C), RS1000628535 (19:50517519 C>T), RS1000647807 (19:50535469 G>A), RS1000773274 (19:50530004 C>T)

Disease associations

OMIM: gene `` | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

0 total (0 of 0 shown, HPO-id order):

GWAS associations

1 associations (top):

StudyTraitp-value
GCST010796_4206Electrocardiogram morphology (amplitude at temporal datapoints)5.000000e-08

EFO canonical traits (1, from GWAS)

EFO IDTrait name
EFO:0004327electrocardiography

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

PharmGKB: 1 entry (VIP=true, CPIC=false)

CTD chemical–gene interactions

13 total (human), top 13 by PubMed support.

ChemicalActions (top 5)PubMed papers
Benzo(a)pyreneaffects methylation, increases methylation2
bisphenol Adecreases methylation1
benzo(e)pyreneincreases methylation1
aflatoxin B2increases methylation1
pentanalincreases expression1
(+)-JQ1 compounddecreases expression1
Sunitinibdecreases expression1
Allergensincreases expression1
Doxorubicindecreases expression1
Estradioldecreases expression1
Methapyrileneincreases methylation1
Rotenonedecreases expression1
Silicon Dioxidedecreases expression1

Clinical trials (associated diseases)

0 trials via MONDO — disease-level, not drug-specific.

No linked Atlas pages yet — the cross-entity mesh grows as the corpus expands.