UNC13B
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Also known as hmunc13Unc13h2Munc13-2
Summary
UNC13B (unc-13 homolog B, HGNC:12566) is a protein-coding gene on chromosome 9p13.3, encoding Protein unc-13 homolog B (O14795). Plays a role in vesicle maturation during exocytosis as a target of the diacylglycerol second messenger pathway.
This gene is expressed in the kidney cortical epithelial cells and is upregulated by hyperglycemia. The encoded protein shares a high level of similarity to the rat homolog, and contains 3 C2 domains and a diacylglycerol-binding C1 domain. Hyperglycemia increases the levels of diacylglycerol, which has been shown to induce apoptosis in cells transfected with this gene and thus contribute to the renal cell complications of hyperglycemia. Studies in other species also indicate a role for this protein in the priming step of synaptic vesicle exocytosis.
Source: NCBI Gene 10497 — RefSeq curated summary.
At a glance
- Gene–disease (curated): epilepsy (Limited, GenCC)
- GWAS associations: 1
- Clinical variants (ClinVar): 226 total
- MANE Select transcript:
NM_001371189
Identifiers
Gene identifiers
| Field | Value |
|---|---|
| HGNC ID | HGNC:12566 |
| Approved symbol | UNC13B |
| Name | unc-13 homolog B |
| Location | 9p13.3 |
| Locus type | gene with protein product |
| Status | Approved |
| Aliases | hmunc13, Unc13h2, Munc13-2 |
| Ensembl gene | ENSG00000198722 |
| Ensembl biotype | protein_coding |
| OMIM | 605836 |
| Entrez | 10497 |
Gene structure
Transcript identifiers
Ensembl transcripts: 22 — 19 protein_coding, 2 protein_coding_CDS_not_defined, 1 nonsense_mediated_decay
ENST00000378495, ENST00000396787, ENST00000481299, ENST00000485086, ENST00000617908, ENST00000619578, ENST00000634487, ENST00000635942, ENST00000636694, ENST00000637271, ENST00000893382, ENST00000893383, ENST00000893384, ENST00000893385, ENST00000893386, ENST00000893387, ENST00000893388, ENST00000893389, ENST00000926708, ENST00000926709, ENST00000960050, ENST00000960051
RefSeq mRNA: 10 — MANE Select: NM_001371189
NM_001330653, NM_001371186, NM_001371187, NM_001371188, NM_001371189, NM_001387551, NM_001387553, NM_001387554, NM_001387555, NM_006377
CCDS: CCDS6579, CCDS83361, CCDS94404, CCDS94405
Canonical transcript exons
ENST00000635942 — 40 exons
| Exon | Start | End |
|---|---|---|
| ENSE00001601970 | 35397167 | 35397310 |
| ENSE00001604130 | 35390629 | 35390714 |
| ENSE00001606211 | 35399161 | 35399284 |
| ENSE00001630741 | 35400296 | 35400443 |
| ENSE00001637880 | 35396476 | 35396602 |
| ENSE00001647802 | 35382357 | 35382507 |
| ENSE00001671723 | 35381556 | 35381719 |
| ENSE00001681649 | 35378295 | 35378436 |
| ENSE00001686073 | 35377468 | 35377695 |
| ENSE00001686544 | 35399392 | 35399448 |
| ENSE00001691463 | 35399649 | 35399729 |
| ENSE00001698775 | 35384246 | 35384314 |
| ENSE00001700709 | 35403167 | 35403259 |
| ENSE00001712544 | 35381100 | 35381215 |
| ENSE00001716271 | 35385724 | 35385813 |
| ENSE00001732787 | 35403440 | 35403599 |
| ENSE00001747930 | 35386165 | 35386293 |
| ENSE00001764783 | 35389846 | 35389973 |
| ENSE00001779184 | 35375127 | 35375201 |
| ENSE00001784178 | 35380470 | 35380639 |
| ENSE00001786745 | 35370318 | 35370396 |
| ENSE00001799823 | 35376028 | 35376247 |
| ENSE00002288367 | 35403748 | 35405335 |
| ENSE00002719065 | 35162009 | 35162305 |
| ENSE00003458834 | 35236469 | 35236586 |
| ENSE00003485032 | 35228015 | 35228044 |
| ENSE00003494008 | 35396841 | 35396937 |
| ENSE00003529139 | 35398882 | 35399034 |
| ENSE00003537615 | 35237703 | 35237826 |
| ENSE00003557749 | 35398554 | 35398642 |
| ENSE00003589037 | 35398211 | 35398288 |
| ENSE00003661933 | 35397635 | 35397712 |
| ENSE00003669762 | 35231120 | 35231219 |
| ENSE00003711555 | 35310467 | 35310781 |
| ENSE00003716525 | 35313899 | 35313989 |
| ENSE00003726831 | 35295696 | 35295930 |
| ENSE00003728345 | 35243291 | 35243364 |
| ENSE00003732064 | 35366947 | 35366993 |
| ENSE00003749875 | 35258993 | 35259050 |
| ENSE00003795905 | 35300166 | 35308412 |
Expression profiles
Bgee: expression breadth ubiquitous, 287 present calls, max score 94.75.
FANTOM5 (CAGE): breadth ubiquitous, TPM avg 15.1145 / max 309.7271, expressed in 1669 samples.
FANTOM5 promoters (7 alternative TSS)
| Promoter ID | TPM avg | Samples expressed |
|---|---|---|
| 96569 | 10.9151 | 1619 |
| 96568 | 3.0940 | 1395 |
| 96578 | 0.7271 | 245 |
| 96577 | 0.1877 | 103 |
| 96579 | 0.1701 | 78 |
| 96570 | 0.0119 | 4 |
| 96571 | 0.0087 | 4 |
Top tissues by expression
295 total, by Bgee expression score (0-100, higher = more expressed):
| Tissue | Anatomy ID | Expression score | Quality |
|---|---|---|---|
| right lung | UBERON:0002167 | 94.75 | gold quality |
| pancreatic ductal cell | CL:0002079 | 94.15 | gold quality |
| lower lobe of lung | UBERON:0008949 | 93.53 | gold quality |
| pigmented layer of retina | UBERON:0001782 | 93.32 | gold quality |
| sperm | CL:0000019 | 92.93 | gold quality |
| lung | UBERON:0002048 | 92.52 | gold quality |
| upper lobe of lung | UBERON:0008948 | 92.46 | gold quality |
| upper lobe of left lung | UBERON:0008952 | 92.31 | gold quality |
| male germ cell | CL:0000015 | 92.25 | gold quality |
| palpebral conjunctiva | UBERON:0001812 | 92.03 | gold quality |
| seminal vesicle | UBERON:0000998 | 90.96 | gold quality |
| epithelium of esophagus | UBERON:0001976 | 90.95 | gold quality |
| middle temporal gyrus | UBERON:0002771 | 90.95 | gold quality |
| esophagus squamous epithelium | UBERON:0006920 | 90.81 | gold quality |
| triceps brachii | UBERON:0001509 | 90.53 | gold quality |
| vastus lateralis | UBERON:0001379 | 90.49 | gold quality |
| ileal mucosa | UBERON:0000331 | 90.48 | gold quality |
| amniotic fluid | UBERON:0000173 | 90.33 | gold quality |
| cardia of stomach | UBERON:0001162 | 90.32 | gold quality |
| rectum | UBERON:0001052 | 90.27 | gold quality |
| quadriceps femoris | UBERON:0001377 | 90.22 | gold quality |
| choroid plexus epithelium | UBERON:0003911 | 90.16 | gold quality |
| muscle of leg | UBERON:0001383 | 89.78 | gold quality |
| parotid gland | UBERON:0001831 | 89.77 | gold quality |
| nasal cavity epithelium | UBERON:0005384 | 89.62 | gold quality |
| islet of Langerhans | UBERON:0000006 | 89.61 | gold quality |
| muscle organ | UBERON:0001630 | 89.61 | gold quality |
| gastrocnemius | UBERON:0001388 | 89.57 | gold quality |
| mucosa of sigmoid colon | UBERON:0004993 | 89.56 | gold quality |
| epithelium of bronchus | UBERON:0002031 | 89.45 | gold quality |
Single-cell (SCXA)
Detected in 1 experiment(s), a significant marker in 1.
| Experiment | Marker? | Max mean expression |
|---|---|---|
| E-ANND-3 | no | 0.00 |
Regulation
Is transcription factor: no
miRNA regulators (miRDB)
53 targeting UNC13B, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):
| miRNA | Max score | Avg score | miRNA target_count |
|---|---|---|---|
| HSA-MIR-6873-3P | 100.00 | 71.42 | 2626 |
| HSA-MIR-29A-3P | 100.00 | 73.11 | 1835 |
| HSA-MIR-29B-3P | 100.00 | 73.18 | 1833 |
| HSA-MIR-29C-3P | 100.00 | 73.15 | 1833 |
| HSA-MIR-96-5P | 99.95 | 72.80 | 2140 |
| HSA-MIR-12133 | 99.92 | 71.82 | 2006 |
| HSA-MIR-1271-5P | 99.91 | 71.99 | 1972 |
| HSA-MIR-498-3P | 99.91 | 71.27 | 1114 |
| HSA-MIR-374A-5P | 99.90 | 71.34 | 2923 |
| HSA-MIR-374B-5P | 99.90 | 69.98 | 2734 |
| HSA-MIR-544A | 99.84 | 68.66 | 1965 |
| HSA-MIR-4659A-3P | 99.80 | 72.62 | 4248 |
| HSA-MIR-4659B-3P | 99.80 | 72.62 | 4248 |
| HSA-MIR-6817-3P | 99.79 | 68.35 | 2126 |
| HSA-MIR-4677-5P | 99.70 | 70.09 | 1940 |
| HSA-MIR-29B-2-5P | 99.67 | 68.98 | 1726 |
| HSA-MIR-6516-3P | 99.65 | 68.57 | 1238 |
| HSA-MIR-7156-5P | 99.64 | 68.81 | 1369 |
| HSA-MIR-5197-5P | 99.64 | 69.08 | 1494 |
| HSA-MIR-302B-5P | 99.50 | 69.49 | 1857 |
| HSA-MIR-302D-5P | 99.50 | 69.34 | 1863 |
| HSA-MIR-578 | 99.46 | 68.36 | 1787 |
| HSA-MIR-4273 | 99.45 | 67.93 | 1206 |
| HSA-MIR-183-5P | 99.31 | 72.27 | 1164 |
| HSA-MIR-548V | 99.29 | 69.47 | 1157 |
| HSA-MIR-296-3P | 99.21 | 66.56 | 474 |
| HSA-MIR-4687-5P | 99.14 | 66.26 | 488 |
| HSA-MIR-146A-3P | 99.13 | 68.99 | 1881 |
| HSA-MIR-320A-5P | 98.88 | 66.75 | 1248 |
| HSA-MIR-6840-3P | 98.68 | 65.95 | 1923 |
Literature-anchored findings (GeneRIF, showing 13)
- Munc13-1 regulates insulin exocytosis (PMID:12871971)
- Data suggest that diacylglycerol-activated hmunc13 serves as an effector of Rab34, mediating lysosome-Golgi trafficking. (PMID:16138900)
- Data identified a polymorphism in the UNC13B gene associated with nephropathy. UNC13B mediates apopotosis in glomerular cells in the presence of hyperglycemia, an event occurring early in the development of nephropathy. (PMID:18633107)
- In the bound state, the hydrophobic anchor residue of the calmodulin (CaM)-binding motif in Munc13 contacts two distinct methionine residues in the carboxyl-terminal domain of CaM. (PMID:19492809)
- mechanistic basis for high glucose-induced protein secretion is through interaction of munc13 and rab34, indicating a potentially critical role for this newly described pathway in the pathogenesis of DN. (PMID:19641095)
- The 1-5-8-26 CaM binding motif discovered in Munc13-1 cannot be induced in the classical CaM target skMLCK, indicating unique features of the Munc13 CaM binding motif. (PMID:24854537)
- A rare missense variation (V1525M) in UNC13B was identified by WES in the multiplex family; this variation was present in five of six affected individuals, but not in eight unaffected individuals or one individual of unknown disease status. Resequencing UNC13B coding regions identified five rare missense variations (T103M, M813T, P1349T, I1362T, and V1525M). (PMID:26990377)
- Assisted by NSF/alpha-SNAP, syntaxin-1 escapes tomosyn arrest and assembles into the Munc18-1/syntaxin-1 complex. Munc13-1 then catalyzes the transit of syntaxin-1 from the Munc18-1/syntaxin-1 complex to the SNARE complex (PMID:29485200)
- Abnormal splicing mutation in UNC13B was identified in the patient with bipolar disorder. (PMID:30117296)
- There were no significant differences in the distribution of allele or genotype frequencies in the five UNC13B SNP markers (rs13293564, rs17360668, rs10114937, rs661712, and rs2281999) between the Diabetic Kidney Disease group and control group of patients with type 2 diabetes mellitus . (PMID:31713534)
- TRPC6 exocytosis by targeting to the C1 domain of Munc13-2. (PMID:32134975)
- UNC13B variants associated with partial epilepsy with favourable outcome. (PMID:33876820)
- Munc13 structural transitions and oligomers that may choreograph successive stages in vesicle priming for neurotransmitter release. (PMID:35135883)
Cross-species orthologs
3 orthologs
| Organism | Symbol | Gene ID |
|---|---|---|
| danio_rerio | UNC13B | ENSDARG00000099113 |
| mus_musculus | Unc13b | ENSMUSG00000028456 |
| rattus_norvegicus | Unc13b | ENSRNOG00000008237 |
Paralogs (2): UNC13A (ENSG00000130477), UNC13C (ENSG00000137766)
Protein
Protein identifiers
Protein unc-13 homolog B — O14795 (reviewed: O14795)
Alternative names: Munc13-2
All UniProt accessions (7): O14795, A0A0U1RRB5, A0A0U1RRL2, A0A1B0GUS7, A0A1B0GVW8, B1AM27, I6L9J0
UniProt curated annotations — full annotation on UniProt →
Function. Plays a role in vesicle maturation during exocytosis as a target of the diacylglycerol second messenger pathway. Is involved in neurotransmitter release by acting in synaptic vesicle priming prior to vesicle fusion and participates in the activity-depending refilling of readily releasable vesicle pool (RRP). Essential for synaptic vesicle maturation in a subset of excitatory/glutamatergic but not inhibitory/GABA-mediated synapses. In collaboration with UNC13A, facilitates neuronal dense core vesicles fusion as well as controls the location and efficiency of their synaptic release.
Subunit / interactions. Interacts with RIMS1.
Subcellular location. Cytoplasm. Membrane. Cell membrane. Synapse.
Tissue specificity. Expressed in kidney cortical epithelial cells and brain.
Domain organisation. The C2 domains are not involved in calcium-dependent phospholipid binding.
Similarity. Belongs to the unc-13 family.
Isoforms (2)
| UniProt ID | Names | Canonical? |
|---|---|---|
| O14795-1 | 1 | yes |
| O14795-2 | 2 |
RefSeq proteins (10): NP_001317582, NP_001358115, NP_001358116, NP_001358117, NP_001358118, NP_001374480, NP_001374482, NP_001374483, NP_001374484, NP_006368 (=MANE)
Domains & families (InterPro)
| ID | Name | Type |
|---|---|---|
| IPR000008 | C2_dom | Domain |
| IPR002219 | PKC_DAG/PE | Domain |
| IPR010439 | MUN_dom | Domain |
| IPR014770 | Munc13_1 | Domain |
| IPR014772 | Munc13_dom-2 | Domain |
| IPR027080 | Unc-13 | Family |
| IPR035892 | C2_domain_sf | Homologous_superfamily |
| IPR037302 | Unc-13_C2B | Domain |
| IPR046349 | C1-like_sf | Homologous_superfamily |
Pfam: PF00130, PF00168, PF06292
UniProt features (34 total): binding site 8, compositionally biased region 5, domain 4, modified residue 4, sequence conflict 4, sequence variant 3, region of interest 2, chain 1, splice variant 1, zinc finger region 1, coiled-coil region 1
Structure
Experimental structures (PDB)
0 structures.
Predicted structure (AlphaFold)
| Model | pLDDT | Fraction very-high |
|---|---|---|
| AF-O14795-F1 | 75.85 | 0.40 |
Functional residue map
Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.
Ligand- & substrate-binding residues (8): 616; 616; 622; 668; 668; 670; 670; 687
Post-translational modifications (4): 16, 176, 295, 367
Function
Pathways and Gene Ontology
Reactome pathways
5 pathways
| ID | Pathway |
|---|---|
| R-HSA-181429 | Serotonin Neurotransmitter Release Cycle |
| R-HSA-181430 | Norepinephrine Neurotransmitter Release Cycle |
| R-HSA-210500 | Glutamate Neurotransmitter Release Cycle |
| R-HSA-212676 | Dopamine Neurotransmitter Release Cycle |
| R-HSA-264642 | Acetylcholine Neurotransmitter Release Cycle |
MSigDB gene sets: 236 (showing top):
GOBP_SINGLE_FERTILIZATION, MODULE_416, GOBP_VESICLE_LOCALIZATION, GCANCTGNY_MYOD_Q6, MODULE_64, GOBP_CELLULAR_RESPONSE_TO_CARBOHYDRATE_STIMULUS, GOBP_POSITIVE_REGULATION_OF_PROTEIN_LOCALIZATION, GAUSSMANN_MLL_AF4_FUSION_TARGETS_C_UP, GOBP_NEUROTRANSMITTER_TRANSPORT, GOBP_VESICLE_MEDIATED_TRANSPORT, GOMF_GTPASE_BINDING, GOBP_REGULATION_OF_CELLULAR_COMPONENT_BIOGENESIS, GOBP_CELLULAR_RESPONSE_TO_OXYGEN_CONTAINING_COMPOUND, CAGCTG_AP4_Q5, GOBP_CELL_CELL_SIGNALING
GO Biological Process (13): chemical synaptic transmission (GO:0007268), positive regulation of synaptic vesicle priming (GO:0010808), obsolete synaptic vesicle docking (GO:0016081), synaptic vesicle priming (GO:0016082), synaptic transmission, glutamatergic (GO:0035249), positive regulation of apoptotic process (GO:0043065), positive regulation of protein secretion (GO:0050714), acrosomal vesicle exocytosis (GO:0060478), dense core granule priming (GO:0061789), cellular response to glucose stimulus (GO:0071333), positive regulation of inhibitory postsynaptic potential (GO:0097151), neuronal dense core vesicle exocytosis (GO:0099011), exocytosis (GO:0006887)
GO Molecular Function (10): calcium ion binding (GO:0005509), calmodulin binding (GO:0005516), phospholipid binding (GO:0005543), zinc ion binding (GO:0008270), syntaxin-1 binding (GO:0017075), diacylglycerol binding (GO:0019992), GTP-dependent protein binding (GO:0030742), small GTPase binding (GO:0031267), protein binding (GO:0005515), metal ion binding (GO:0046872)
GO Cellular Component (11): Golgi apparatus (GO:0005794), cytosol (GO:0005829), plasma membrane (GO:0005886), membrane (GO:0016020), synaptic vesicle membrane (GO:0030672), neuromuscular junction (GO:0031594), presynaptic membrane (GO:0042734), terminal bouton (GO:0043195), presynaptic active zone (GO:0048786), cytoplasm (GO:0005737), synapse (GO:0045202)
Reactome top-level categories
Rollup of top-1 pathways:
| Category | Pathways |
|---|---|
| Neurotransmitter release cycle | 5 |
GO top-level categories
Rollup of top GO terms by namespace:
| Category | Terms |
|---|---|
| cellular anatomical structure | 4 |
| presynapse | 3 |
| protein-containing complex assembly | 2 |
| exocytic process | 2 |
| dense core granule exocytosis | 2 |
| protein binding | 2 |
| lipid binding | 2 |
| cytoplasm | 2 |
| anterograde trans-synaptic signaling | 1 |
| regulation of synaptic vesicle priming | 1 |
| synaptic vesicle priming | 1 |
| positive regulation of protein-containing complex assembly | 1 |
| synaptic vesicle exocytosis | 1 |
| chemical synaptic transmission | 1 |
| apoptotic process | 1 |
| regulation of apoptotic process | 1 |
| positive regulation of programmed cell death | 1 |
| protein secretion | 1 |
| regulation of protein secretion | 1 |
| positive regulation of protein transport | 1 |
| positive regulation of secretion by cell | 1 |
| acrosome reaction | 1 |
| calcium-ion regulated exocytosis | 1 |
| intracellular glucose homeostasis | 1 |
| response to glucose | 1 |
| cellular response to hexose stimulus | 1 |
| positive regulation of nervous system process | 1 |
| inhibitory postsynaptic potential | 1 |
| modulation of inhibitory postsynaptic potential | 1 |
| vesicle-mediated transport | 1 |
| secretion by cell | 1 |
| vesicle fusion to plasma membrane | 1 |
| metal ion binding | 1 |
| transition metal ion binding | 1 |
| syntaxin binding | 1 |
| GTPase binding | 1 |
| binding | 1 |
| cation binding | 1 |
| endomembrane system | 1 |
| intracellular membrane-bounded organelle | 1 |
Protein interactions and networks
STRING
1260 interactions, top by confidence (×1000):
| Protein A | Protein B | Partner UniProt | Score |
|---|---|---|---|
| UNC13B | ERC1 | Q8IUD2 | 993 |
| UNC13B | RIMS1 | Q86UR5 | 987 |
| UNC13B | STXBP1 | P61764 | 970 |
| UNC13B | CALM1 | P02593 | 966 |
| UNC13B | CALML3 | P27482 | 964 |
| UNC13B | CALML5 | Q9NZT1 | 964 |
| UNC13B | CALML6 | Q8TD86 | 962 |
| UNC13B | CALML4 | Q96GE6 | 962 |
| UNC13B | PPFIA3 | O75145 | 920 |
| UNC13B | SNAP25 | P13795 | 912 |
| UNC13B | SYT1 | P21579 | 887 |
| UNC13B | VAMP2 | P19065 | 886 |
| UNC13B | STX1A | Q16623 | 863 |
| UNC13B | PPFIA1 | Q13136 | 858 |
| UNC13B | RAB3A | P20336 | 857 |
IntAct
33 interactions, top by confidence:
| A | B | Type | Score |
|---|---|---|---|
| PPP2R3A | WTIP | psi-mi:“MI:0914”(association) | 0.640 |
| DIRAS2 | UNC13B | psi-mi:“MI:0914”(association) | 0.530 |
| DIRAS1 | UNC13B | psi-mi:“MI:0914”(association) | 0.500 |
| DIRAS1 | UNC13B | psi-mi:“MI:0915”(physical association) | 0.500 |
| NS1 | psi-mi:“MI:0914”(association) | 0.350 | |
| NS1 | ESYT2 | psi-mi:“MI:0914”(association) | 0.350 |
| NS1 | SAC3D1 | psi-mi:“MI:0914”(association) | 0.350 |
| ECH1 | A2ML1 | psi-mi:“MI:0914”(association) | 0.350 |
| CCDC40 | PSMD9 | psi-mi:“MI:0914”(association) | 0.350 |
| RIMS1 | KIF2A | psi-mi:“MI:0914”(association) | 0.350 |
| CALM1 | MYO1C | psi-mi:“MI:0914”(association) | 0.350 |
| CALM2 | MYO1C | psi-mi:“MI:0914”(association) | 0.350 |
| CALM3 | PLEKHG3 | psi-mi:“MI:0914”(association) | 0.350 |
| CTCFL | TARS3 | psi-mi:“MI:0914”(association) | 0.350 |
| COQ3 | TARS3 | psi-mi:“MI:0914”(association) | 0.350 |
| DOC2B | POTEF | psi-mi:“MI:0914”(association) | 0.350 |
| CALML3 | MYO1C | psi-mi:“MI:0914”(association) | 0.350 |
| CCDC71 | SUPT5H | psi-mi:“MI:0914”(association) | 0.350 |
| CCDC40 | TRAF5 | psi-mi:“MI:0914”(association) | 0.350 |
| C2CD6 | ACACB | psi-mi:“MI:0914”(association) | 0.350 |
| ZNF418 | ZNF195 | psi-mi:“MI:0914”(association) | 0.350 |
| DNAJC22 | UNC13B | psi-mi:“MI:0914”(association) | 0.350 |
| GARS1 | UNC13B | psi-mi:“MI:0914”(association) | 0.350 |
| CALM1 | PLEKHG3 | psi-mi:“MI:0914”(association) | 0.350 |
| CEP72 | UNC13B | psi-mi:“MI:0914”(association) | 0.350 |
| FBXO11 | ABLIM1 | psi-mi:“MI:0914”(association) | 0.350 |
| GLB1 | UNC13B | psi-mi:“MI:0914”(association) | 0.350 |
| EXOC1 | UNC13B | psi-mi:“MI:0915”(physical association) | 0.000 |
| UNC13B | hslO | psi-mi:“MI:0915”(physical association) | 0.000 |
BioGRID (67): UNC13B (Biochemical Activity), STX1A (Two-hybrid), UNC13B (Affinity Capture-Western), UNC13B (Affinity Capture-MS), UNC13B (Affinity Capture-MS), UNC13B (Affinity Capture-MS), UNC13B (Affinity Capture-MS), UNC13B (Affinity Capture-MS), UNC13B (Reconstituted Complex), UNC13B (Affinity Capture-RNA), STX1B (Two-hybrid), UNC13B (Two-hybrid), SPTBN2 (Two-hybrid), RIMS1 (Two-hybrid), RIMS1 (Reconstituted Complex)
ESM2 similar proteins: A0A4X1TB62, A4VCH4, G3V7Q0, O14795, O35841, O43237, O70585, P23116, P48553, Q0P5J8, Q14152, Q15542, Q1JU68, Q3TLI0, Q3UHE1, Q4R5P6, Q5R660, Q5R7S4, Q5R7U7, Q5RE09, Q5RE70, Q5VSL9, Q5XI83, Q658Y4, Q68E01, Q6IQ26, Q6PAL8, Q6PDL0, Q6TEP1, Q6WKZ8, Q7SYD9, Q7TPD0, Q8BIK4, Q8BWQ6, Q8C079, Q8C092, Q8C9H6, Q8CBY8, Q8IWV8, Q8K400
Diamond homologs: A0JJX5, A1CQG2, A1ZBD6, A2QQ28, A3KGK3, A4IFJ5, A6QQP7, A8KBH6, B1WAZ6, B8N7E5, G0S9J5, O14065, O14795, O43581, O75131, O75923, O94812, P04409, P05126, P05128, P05129, P05696, P05771, P05772, P0C869, P0C871, P10102, P10829, P13677, P17252, P20444, P21521, P27715, P29101, P41823, P41885, P46097, P46935, P49147, P63318
SIGNOR signaling
5 interactions.
| A | Effect | B | Mechanism |
|---|---|---|---|
| UNC13B | “up-regulates activity” | SNARE_complex | “transcriptional regulation” |
| RIMS2 | “up-regulates activity” | UNC13B | relocalization |
| RIMS3 | “up-regulates activity” | UNC13B | relocalization |
| RIMS1 | “up-regulates activity” | UNC13B | relocalization |
| UNC13B | up-regulates | Synaptic_vesicle_exocytosis |
Disease & clinical
Clinical variants and AI predictions
ClinVar
226 variants total. Per-class counts are floors (≥ shown; pagination cap):
| Classification | Count (floor) |
|---|---|
| Pathogenic | 0 |
| Likely pathogenic | 0 |
| Uncertain significance | 185 |
| Likely benign | 12 |
| Benign | 5 |
Top pathogenic / likely-pathogenic (0)
SpliceAI
8596 predictions. Top by Δscore:
| Variant | Effect | Δscore |
|---|---|---|
| 9:35168496:T:G | acceptor_gain | 1.0000 |
| 9:35203771:G:T | donor_gain | 1.0000 |
| 9:35231116:A:AG | acceptor_gain | 1.0000 |
| 9:35231116:AAAG:A | acceptor_loss | 1.0000 |
| 9:35231117:A:G | acceptor_gain | 1.0000 |
| 9:35231118:A:AG | acceptor_gain | 1.0000 |
| 9:35231119:G:GC | acceptor_loss | 1.0000 |
| 9:35231119:G:GG | acceptor_gain | 1.0000 |
| 9:35231119:GATA:G | acceptor_gain | 1.0000 |
| 9:35231119:GATAA:G | acceptor_gain | 1.0000 |
| 9:35231217:GTT:G | donor_gain | 1.0000 |
| 9:35231220:G:GG | donor_gain | 1.0000 |
| 9:35236467:A:AG | acceptor_gain | 1.0000 |
| 9:35236468:G:GA | acceptor_gain | 1.0000 |
| 9:35236468:GT:G | acceptor_gain | 1.0000 |
| 9:35236468:GTGA:G | acceptor_gain | 1.0000 |
| 9:35237702:GGAA:G | acceptor_gain | 1.0000 |
| 9:35243284:A:AG | acceptor_gain | 1.0000 |
| 9:35243284:AT:A | acceptor_gain | 1.0000 |
| 9:35243285:T:G | acceptor_gain | 1.0000 |
| 9:35243285:T:TA | acceptor_gain | 1.0000 |
| 9:35243287:GTAGA:G | acceptor_loss | 1.0000 |
| 9:35243289:A:C | acceptor_loss | 1.0000 |
| 9:35243290:G:GT | acceptor_loss | 1.0000 |
| 9:35243290:GAT:G | acceptor_gain | 1.0000 |
| 9:35243361:TGAG:T | donor_loss | 1.0000 |
| 9:35243363:AGG:A | donor_loss | 1.0000 |
| 9:35243364:GG:G | donor_loss | 1.0000 |
| 9:35243365:G:A | donor_loss | 1.0000 |
| 9:35243366:T:G | donor_loss | 1.0000 |
AlphaMissense
28831 scored. Top likely-pathogenic:
| Variant | Protein change | am_pathogenicity |
|---|---|---|
| 9:35382422:T:C | L825P | 1.000 |
| 9:35382488:T:C | F847S | 1.000 |
| 9:35384277:T:C | L864P | 1.000 |
| 9:35384289:T:C | L868P | 1.000 |
| 9:35384301:T:C | L872P | 1.000 |
| 9:35385785:T:C | L897P | 1.000 |
| 9:35385790:A:C | S899R | 1.000 |
| 9:35385792:C:A | S899R | 1.000 |
| 9:35385792:C:G | S899R | 1.000 |
| 9:35385799:T:C | F902L | 1.000 |
| 9:35385801:C:A | F902L | 1.000 |
| 9:35385801:C:G | F902L | 1.000 |
| 9:35231144:T:C | L26P | 0.999 |
| 9:35236542:G:T | G76W | 0.999 |
| 9:35376053:T:C | L465P | 0.999 |
| 9:35376130:T:C | C491R | 0.999 |
| 9:35376131:G:A | C491Y | 0.999 |
| 9:35376132:C:G | C491W | 0.999 |
| 9:35376154:T:A | W499R | 0.999 |
| 9:35376154:T:C | W499R | 0.999 |
| 9:35376181:T:C | C508R | 0.999 |
| 9:35376183:C:G | C508W | 0.999 |
| 9:35376214:T:C | C519R | 0.999 |
| 9:35377552:G:C | R558P | 0.999 |
| 9:35377558:G:C | R560P | 0.999 |
| 9:35378313:T:C | L612P | 0.999 |
| 9:35378417:T:A | W647R | 0.999 |
| 9:35378417:T:C | W647R | 0.999 |
| 9:35380510:T:A | W667R | 0.999 |
| 9:35380510:T:C | W667R | 0.999 |
dbSNP variants (sampled 300 via entrez): RS1000006488 (9:35218253 T>C), RS1000020977 (9:35218179 G>A), RS1000021676 (9:35362746 G>A), RS1000028947 (9:35266539 T>G), RS1000050046 (9:35285887 A>G), RS1000050471 (9:35276277 G>A), RS1000059994 (9:35266926 C>A,T), RS1000078361 (9:35173607 A>G), RS1000095127 (9:35381832 A>G), RS1000097612 (9:35165395 G>A,C), RS1000107765 (9:35311770 G>T), RS1000115621 (9:35334758 C>A,T), RS1000132661 (9:35172937 C>A,T), RS1000147656 (9:35286191 A>G), RS1000164900 (9:35317906 T>A)
Disease associations
OMIM: gene MIM:605836 | disease phenotypes:
GenCC curated gene-disease
| Disease | Classification | Inheritance |
|---|---|---|
| epilepsy | Limited | Autosomal dominant |
Mondo (1): epilepsy (MONDO:0005027)
Orphanet (0):
HPO phenotypes
0 total (0 of 0 shown, HPO-id order):
GWAS associations
1 associations (top):
| Study | Trait | p-value |
|---|---|---|
| GCST001189_2 | Parkinson’s disease | 3.000000e-06 |
MeSH disease descriptors (1)
| Descriptor | Name | Tree numbers |
|---|---|---|
| D004827 | Epilepsy | C10.228.140.490 |
Drugs & pharmacology
Drug and pharmacology data
Is drug target: no
PharmGKB: 1 entry (VIP=true, CPIC=false)
CTD chemical–gene interactions
28 total (human), top 28 by PubMed support.
| Chemical | Actions (top 5) | PubMed papers |
|---|---|---|
| Air Pollutants | decreases expression, increases abundance | 2 |
| aristolochic acid I | decreases expression | 1 |
| FR900359 | increases phosphorylation | 1 |
| bisphenol F | affects cotreatment, decreases expression | 1 |
| dicrotophos | increases expression | 1 |
| sodium arsenite | increases reaction, affects binding | 1 |
| perfluorooctanoic acid | increases expression | 1 |
| aflatoxin B2 | decreases methylation | 1 |
| di-n-butylphosphoric acid | affects expression | 1 |
| CGP 52608 | increases reaction, affects binding | 1 |
| abrine | decreases expression | 1 |
| (+)-JQ1 compound | increases expression | 1 |
| Sunitinib | increases expression | 1 |
| Caffeine | decreases phosphorylation | 1 |
| Cisplatin | decreases expression | 1 |
| Dexamethasone | affects cotreatment, decreases expression | 1 |
| Doxorubicin | affects expression | 1 |
| Indomethacin | affects cotreatment, decreases expression | 1 |
| Lead | affects expression | 1 |
| Silicon Dioxide | decreases expression | 1 |
| Valproic Acid | affects expression | 1 |
| 1-Methyl-3-isobutylxanthine | affects cotreatment, decreases expression | 1 |
| Aflatoxin B1 | decreases methylation | 1 |
| Antirheumatic Agents | increases expression | 1 |
| Cadmium Chloride | increases expression | 1 |
| Okadaic Acid | increases expression | 1 |
| Copper Sulfate | decreases expression | 1 |
| Particulate Matter | decreases expression, increases abundance | 1 |
Clinical trials (associated diseases)
300 trials via MONDO — disease-level, not drug-specific.
| Trial | Phase | Status | Title |
|---|---|---|---|
| NCT00004637 | PHASE4 | COMPLETED | Double-Blind, Placebo-Controlled Trial of Vitamin E as Add-on Therapy for Children With Epilepsy |
| NCT00043914 | PHASE4 | COMPLETED | Measurement Of Serum Levels Of Two Antiepileptic Drugs During Conversion In Patients With Epilepsy |
| NCT00132223 | PHASE4 | UNKNOWN | Effects on the Diagnostic Accuracy of Magnetic Imaging Angiographies of the Supra-Aortic Vessels by Three Different Magnetic Resonance Contrast Agents in Patients |
| NCT00133081 | PHASE4 | UNKNOWN | Study to Improve the Treatment of Epilepsy (SITE) |
| NCT00137709 | PHASE4 | UNKNOWN | Hormone Profiles in Adults With Newly Diagnosed Epilepsy |
| NCT00154076 | PHASE4 | COMPLETED | A Multicenter Comparative Trial of Zonisamide and Topiramate as Initial Monotherapy in Untreated Epilepsies |
| NCT00165828 | PHASE4 | TERMINATED | Efficacy and Safety of an add-on Treatment With Zonisamide in Adults With Focal Epileptic Seizures With or Without Secondary Generalization |
| NCT00181116 | PHASE4 | COMPLETED | Levetiracetam for Benign Rolandic Epilepsy |
| NCT00207935 | PHASE4 | COMPLETED | Use of Sustained Release Antiepileptic Medication (Depakote® ER) for Pediatric Epilepsy in a Mental Retardation/Developmental Disorder Population |
| NCT00215592 | PHASE4 | COMPLETED | Open Label, Zonegran (Zonisamide) In Partial Onset Seizures |
| NCT00266604 | PHASE4 | COMPLETED | A Study to Evaluate the Dosing, Effectiveness and Safety of Topiramate for the Treatment of Epilepsy |
| NCT00288639 | PHASE4 | COMPLETED | Lyrica (Pregabalin) Administered as an Add-on Therapy for Partial Seizures (LEADER). |
| NCT00312676 | PHASE4 | UNKNOWN | Compare Tolerability of an Overnight Switch to Gradual Switch Between Two Different Forms of Depakote |
| NCT00323947 | PHASE4 | COMPLETED | Methylphenidate for Treating Attention Deficit Hyperactivity Disorder in Children With Both ADHD and Epilepsy |
| NCT00385411 | PHASE4 | COMPLETED | Study of Valproate in Young Patients Suffering From Epilepsy |
| NCT00522418 | PHASE4 | TERMINATED | Study Comparing Best Medical Practice With or Without VNS Therapy in Pharmacoresistant Partial Epilepsy Patients |
| NCT00537940 | PHASE4 | COMPLETED | Comparative Study Of Pregabalin And Gabapentin As Adjunctive Therapy In Subjects With Partial Seizures |
| NCT00552526 | PHASE4 | UNKNOWN | Ketogenic Diet vs.Antiepileptic Drug Treatment in Drug Resistant Epilepsy |
| NCT00564915 | PHASE4 | COMPLETED | RCT of the Efficacy of the Ketogenic Diet in the Treatment of Epilepsy |
| NCT00571155 | PHASE4 | COMPLETED | Trial of Levetiracetam in Patients With Primary Brain Tumors and Symptomatic Seizures Who Undergo Surgery |
| NCT00572195 | PHASE4 | COMPLETED | RNS® System LTT Study |
| NCT00610532 | PHASE4 | TERMINATED | Evaluating the Transporter Protein Inhibitor Probenecid In Patients With Epilepsy |
| NCT00630357 | PHASE4 | COMPLETED | Trial to Evaluate the Safety and Efficacy of Keppra After Conversion to Mono-therapy in Subjects With Partial Epilepsy |
| NCT00630630 | PHASE4 | COMPLETED | Study on Safety and Efficacy of Levetiracetam in the Adjunctive Treatment of Female Subjects With C1 Catamenial Epilepsy |
| NCT00630968 | PHASE4 | COMPLETED | S.K.A.T.E.: Safety of Keppra as Adjunctive Therapy in Epilepsy |
| NCT00631150 | PHASE4 | COMPLETED | A Phase IV-Pharmacovigilance Study of Keppra Greece - S.K.A.T.E.: Safety of Keppra as Adjunctive Therapy in Epilepsy |
| NCT00659958 | PHASE4 | COMPLETED | ZAGAL Study: Evaluating Effectiveness and Tolerability of Zonisamide as Adjunctive Therapy in Patients With Partial Onset Seizures Treated With Two Antiepileptic Drugs |
| NCT00713622 | PHASE4 | COMPLETED | Comparing The Effect On Cognition Of Adjunctive Therapy With Zonisamide Versus Sodium Valproate |
| NCT00807989 | PHASE4 | COMPLETED | The Efficacy and Safety of Low Dose Combination of LTG and VPA Compared to CBZ Monotherapy |
| NCT00832884 | PHASE4 | COMPLETED | The Safety of Intravenous Lacosamide |
| NCT00869622 | PHASE4 | COMPLETED | Antiepileptic Drugs and Osteoporotic Prevention Trial |
| NCT00896987 | PHASE4 | COMPLETED | Lamotrigine Cognitive Function Study in Adult Untreated Epilepsies |
| NCT00952081 | PHASE4 | COMPLETED | A Pilot Study to Evaluate Efficacy and Safety of Clevidipine in Neurosurgical Patients |
| NCT01118455 | PHASE4 | TERMINATED | Trial to Assess Vagus Nerve Stimulation Therapy vs. Anti-Epileptic Drug (AED) Treatment in Children With Refractory Seizures |
| NCT01127165 | PHASE4 | COMPLETED | Low and High Dose Zonisamide in Children as Monotherapy |
| NCT01127256 | PHASE4 | COMPLETED | Comparative Study of Zonisamide and Carbamazepine as an Initial Monotherapy: Efficacy and Safety Evaluation |
| NCT01140867 | PHASE4 | COMPLETED | Open-label, Multi-center Trial of Zonisamide as Adjunctive Therapy in Patients With Uncontrolled Partial Epilepsy |
| NCT01175954 | PHASE4 | COMPLETED | Cognitive and Behavioral Effects of Lacosamide |
| NCT01229735 | PHASE4 | COMPLETED | Levetiracetam Versus Topiramate as Adjunctive Therapy to Evaluate Efficacy and Safety in Subjects With Refractory Partial Onset Seizures |
| NCT01244724 | PHASE4 | TERMINATED | Lexapro for Major Depression in Patients With Epilepsy |
Related Atlas pages
- Associated diseases: epilepsy
- Disease cohort memberships (association, not causation — diseases whose associated-gene cohort lists this gene; a subset are also under Associated diseases): epilepsy, Parkinson disease