LIN7B
protein-codinglin-7 homolog B, crumbs cell polarity complex component, the group of Crumbs complex|PDZ domain containing
Gene summary
Enables protein domain specific binding activity. Predicted to be involved in neurotransmitter secretion; regulation of synaptic assembly at neuromuscular junction; and synaptic vesicle transport. Predicted to be located in plasma membrane. Predicted to be part of MPP7-DLG1-LIN7 complex. Predicted to be active in basolateral plasma membrane; cell-cell junction; and postsynaptic density, intracellular component. [provided by Alliance of Genome Resources, Jul 2025]
MANE transcript
Inheritance
ClinVar variants
Top phenotype
gnomAD constraint
Max pathogenic AF
Genomic locus
External References & Databases
Transcript & Mutation Effects
hg38 • Region Span ~4.1 kbGenCC Phenotypes & Disease Associations
Curated gene-disease validity assertions and inheritance patterns
No GenCC data available for this gene.
ClinVar Associated Diseases & Phenotypes
Reported disease conditions connected to LIN7B variants in ClinVar
ClinVar Variants & Pathogenicity by Type
Statistics based on transcript NM_022165.3. Only rare variants are included.
We include only reliable ClinVar variants with their consequences to MANE Select, MANE Plus Clinical transcripts, or transcripts with TSL equal to 1. Click a count to filter the variants table below.
Slight differences between displayed counts and ClinVar may occur due to a different transcript/consequence chosen by our variant effect predictor, or because we classify Benign/Likely benign as Likely benign and Pathogenic/Likely pathogenic as Likely pathogenic.
| Effect | PathogenicP | Likely pathogenicLP | VUS | Likely benignLB | BenignB | Sum |
|---|---|---|---|---|---|---|
| synonymous | 2 | 2 | ||||
| missense | 49 | 49 | ||||
| nonsense | 0 | |||||
| start loss | 0 | |||||
| frameshift | 1 | 1 | ||||
| splice donor/acceptor (+/-2bp) | 0 | |||||
| Total | 0 | 0 | 50 | 2 | 0 | 52 |
Transcript Catalog
Annotated transcript isoforms across RefSeq and Ensembl databases
| Transcript ID | Source | Protein ID | Coding Exons | MANE Status |
|---|---|---|---|---|
| RefSeq | NP_071448.1 | 6 | MANE Select | |
| Ensembl | ENSP00000221459.2 | 6 | MANE Select | |
| RefSeq | NP_001295348.1 | 5 | Standard | |
| Ensembl | ENSP00000375737.3 | 5 | Standard |
Gene Ontology (GO) Annotations & Pathways
Biological processes, molecular functions, cellular components and pathways
Pathways ConsensusPathDB
- Signal Transduction
- RHO GTPases Activate Rhotekin and Rhophilins
- Neuronal System
- RHO GTPase Effectors
- Signaling by Rho GTPases
Biological Process
- exocytosis
- neurotransmitter secretion
- protein transport
- maintenance of epithelial cell apical/basal polarity
- protein localization to basolateral plasma membrane
Molecular Function
- protein domain specific binding
- PDZ domain binding
- L27 domain binding
Cellular Component
- plasma membrane
- cell-cell junction
- bicellular tight junction
- postsynaptic density
- basolateral plasma membrane
gnomAD Constraint
Source:
- Gene type
- protein_coding
- Transcript type
- protein_coding
- Transcript
- ENST00000221459
- Coding exons
- 6
- Length
- 4137
- Individuals with no LoFs
- 125729
- Homozygous LoFs
- 0
- Heterozygous LoFs
- 10
- Defined
- 125739
- p
- 0.0000398
| Z-Score | Observed | Expected | Observed/Expected | Mutation Rate | Total Possible | |
|---|---|---|---|---|---|---|
| Missense | 1.08 | 90 | 124 | 0.728 | 0.00000835 | 1287 |
| Missense (PolyPhen) | 25 | 47.986 | 0.52099 | 464 | ||
| Synonymous | -0.0364 | 51 | 50.7 | 1.01 | 0.00000339 | 439 |
| Loss of Function | 2.74 | 1 | 10.7 | 0.0936 | 7.15e-7 | 114 |
Population LoF Frequency
| Population | CAF | p-value | Status |
|---|---|---|---|
| African | 0 | 0.0 | absent |
| Latino/Admixed American | 0 | 0.0 | absent |
| Ashkenazi Jewish | 0 | 0.0 | absent |
| East Asian | 0.000054 | 0.000054 | rare |
| Finnish | 0 | 0.0 | absent |
| European (Non-Finnish) | 0.000071 | 0.000070 | rare |
| South Asian | 0.000033 | 0.000033 | rare |
| Other | 0 | 0.0 | absent |
dbNSFP Gene Annotations
Source:
- Function
- FUNCTION: Plays a role in establishing and maintaining the asymmetric distribution of channels and receptors at the plasma membrane of polarized cells. Forms membrane-associated multiprotein complexes that may regulate delivery and recycling of proteins to the correct membrane domains. The tripartite complex composed of LIN7 (LIN7A, LIN7B or LIN7C), CASK and APBA1 may have the potential to couple synaptic vesicle exocytosis to cell adhesion in brain. Ensures the proper localization of GRIN2B (subunit 2B of the NMDA receptor) to neuronal postsynaptic density and may function in localizing synaptic vesicles at synapses where it is recruited by beta-catenin and cadherin. Required to localize Kir2 channels, GABA transporter (SLC6A12) and EGFR/ERBB1, ERBB2, ERBB3 and ERBB4 to the basolateral membrane of epithelial cells. May increase the amplitude of ASIC3 acid-evoked currents by stabilizing the channel at the cell surface (By similarity). {ECO:0000250, ECO:0000269|PubMed:11742811}.;
Recessive Scores
- pRec
- 0.142
Intolerance Scores
- LoFtool
- 0.396
- RVIS EVS
- -0.12
- RVIS percentile EVS
- 44.54
Essentials
- Essential (CRISPR)
- N
- Essential (CRISPR2)
- N
- Essential (gene trap)
- N
- Indispensability pred.
- E
- Indispensability score
- 0.945
Gene Damage Prediction
| All | Recessive | Dominant | |
|---|---|---|---|
| Mendelian | Medium | Medium | Medium |
| Primary Immunodeficiency | Medium | Medium | Medium |
| Cancer | Medium | Medium | Medium |