O95970 (LGI1_HUMAN) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 1, 2013.
Version 114.
History...
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Web links·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Web links·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Leucine-rich glioma-inactivated protein 1 Alternative name(s): Epitempin-1 | ||||||
| Gene names |
| ||||||
| Organism | Homo sapiens (Human) [Reference proteome] | ||||||
| Taxonomic identifier | 9606 [NCBI] | ||||||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo![]() |
Protein attributes
| Sequence length | 557 AA. |
| Sequence status | Complete. |
| Sequence processing | The displayed sequence is further processed into a mature form. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | Regulates voltage-gated potassium channels assembled from KCNA1, KCNA4 and KCNAB1. It slows down channel inactivation by precluding channel closure mediated by the KCNAB1 subunit. Ligand for ADAM22 that positively regulates synaptic transmission mediated by AMPA-type glutamate receptors By similarity. Plays a role in suppressing the production of MMP1/3 through the phosphatidylinositol 3-kinase/ERK pathway. May play a role in the control of neuroblastoma cell survival. Ref.8 Ref.11 |
| Subunit structure | Oligomer By similarity. Interacts with KCNA1 within a complex containing KCNA1, KCNA4 and KCNAB1 By similarity. Part of a complex containing ADAM22, DLG4/PSD95 and CACNG2 (stargazin) By similarity. Can bind to ADAM11 and ADAM23 By similarity. |
| Subcellular location | Secreted. Cell junction › synapse By similarity. Note: Isoform 1 but not isoform 2 is secreted. Isoform 1 is enriched in the Golgi apparatus while isoform 2 accumulates in the endoplasmic reticulum. Ref.10 Ref.12 Ref.13 |
| Tissue specificity | Predominantly expressed in neural tissues, especially in brain. Expression is reduced in low-grade brain tumors and significantly reduced or absent in malignant gliomas. Isoform 1 is absent in the cerebellum and is detectable in the occipital cortex and hippocampus; higher amounts are observed in the parietal and frontal cortices, putamen, and, particularly, in the temporal neocortex, where it is 3.5 times more abundant than in the hippocampus (at protein level). Isoform 3 shows the highest expression in the occipital cortex and the lowest in the hippocampus (at protein level). Ref.11 Ref.12 |
| Induction | Down-regulated in neuroblastoma cells. Ref.11 |
| Post-translational modification | Glycosylated. Ref.10 |
| Involvement in disease | Epilepsy, familial temporal lobe, 1 (ETL1) [MIM:600512]: A focal form of epilepsy characterized by recurrent seizures that arise from foci within the temporal lobe. Seizures are usually accompanied by sensory symptoms, most often auditory in nature. |
| Sequence similarities | Contains 7 EAR repeats. Contains 3 LRR (leucine-rich) repeats. Contains 1 LRRCT domain. Contains 1 LRRNT domain. |
Ontologies
Alternative products
| This entry describes 3 isoforms produced by alternative splicing. [Align] [Select] | ||||||
| Isoform 1 (identifier: O95970-1) This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. | ||||||
| Isoform 2 (identifier: O95970-2) The sequence of this isoform differs from the canonical sequence as follows: 280-291: GTSTVVCKPIVI → VLREIHRFTNMS 292-557: Missing. | ||||||
| Isoform 3 (identifier: O95970-3) The sequence of this isoform differs from the canonical sequence as follows: 96-143: Missing. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Signal peptide | 1 – 34 | 34 | Potential | ||||||
| Chain | 35 – 557 | 523 | Leucine-rich glioma-inactivated protein 1 | PRO_0000017705 | |||||
Regions | |||||||||
| Domain | 35 – 72 | 38 | LRRNT | ||||||
| Repeat | 92 – 113 | 22 | LRR 1 | ||||||
| Repeat | 116 – 137 | 22 | LRR 2 | ||||||
| Repeat | 140 – 161 | 22 | LRR 3 | ||||||
| Domain | 173 – 223 | 51 | LRRCT | ||||||
| Repeat | 224 – 267 | 44 | EAR 1 | ||||||
| Repeat | 270 – 313 | 44 | EAR 2 | ||||||
| Repeat | 316 – 364 | 49 | EAR 3 | ||||||
| Repeat | 365 – 415 | 51 | EAR 4 | ||||||
| Repeat | 418 – 462 | 45 | EAR 5 | ||||||
| Repeat | 463 – 506 | 44 | EAR 6 | ||||||
| Repeat | 509 – 552 | 44 | EAR 7 | ||||||
Amino acid modifications | |||||||||
| Glycosylation | 192 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 277 | 1 | N-linked (GlcNAc...) Potential | ||||||
| Glycosylation | 422 | 1 | N-linked (GlcNAc...) Potential | ||||||
Natural variations | |||||||||
| Alternative sequence | 96 – 143 | 48 | Missing in isoform 3. | VSP_038234 | |||||
| Alternative sequence | 280 – 291 | 12 | GTSTV…KPIVI → VLREIHRFTNMS in isoform 2. | VSP_007678 | |||||
| Alternative sequence | 292 – 557 | 266 | Missing in isoform 2. | VSP_007679 | |||||
| Natural variant | 26 | 1 | L → R in ETL1; probably affects signal sequence processing and secretion. Ref.17 | VAR_015771 | |||||
| Natural variant | 42 | 1 | C → G in ETL1. Ref.19 | VAR_023008 | |||||
| Natural variant | 42 | 1 | C → R in ETL1. | VAR_058538 | |||||
| Natural variant | 46 | 1 | C → R in ETL1; loss of protein secretion; does not affect glycosylation status of the protein. Ref.10 Ref.16 | VAR_015772 | |||||
| Natural variant | 110 | 1 | A → D in ETL1. | VAR_058539 | |||||
| Natural variant | 122 | 1 | I → K in ETL1. Ref.21 | VAR_058540 | |||||
| Natural variant | 123 | 1 | E → K in ETL1. Ref.22 | VAR_058541 | |||||
| Natural variant | 136 | 1 | R → W in ETL1. Ref.20 | VAR_058542 | |||||
| Natural variant | 145 | 1 | S → R in ETL1; loss of protein secretion; does not affect glycosylation status of the protein. Ref.10 | VAR_058543 | |||||
| Natural variant | 154 | 1 | L → P in ETL1. | VAR_058544 | |||||
| Natural variant | 200 | 1 | C → R in ETL1; loss of protein secretion; does not affect glycosylation status of the protein. Ref.10 | VAR_058545 | |||||
| Natural variant | 232 | 1 | L → P in ETL1; loss of protein secretion. Ref.13 | VAR_058546 | |||||
| Natural variant | 298 | 1 | I → T in ETL1. | VAR_058547 | |||||
| Natural variant | 318 | 1 | F → C in ETL1; loss of protein secretion; protein is retained in the endoplasmic reticulum; does not affect glycosylation status of the protein. Ref.10 Ref.18 Corresponds to variant rs28939075 [ dbSNP | Ensembl ]. | VAR_015774 | |||||
| Natural variant | 383 | 1 | E → A in ETL1; loss of protein secretion; protein is retained in the endoplasmic reticulum; does not affect glycosylation status of the protein. Ref.10 Ref.13 Ref.15 Corresponds to variant rs28937874 [ dbSNP | Ensembl ]. | VAR_015773 | |||||
| Natural variant | 432 | 1 | V → E in ETL1. | VAR_058548 | |||||
| Natural variant | 473 | 1 | S → L in ETL1. Ref.19 | VAR_023009 | |||||
Experimental info | |||||||||
| Mutagenesis | 192 | 1 | N → Q: Affects glycosylation; when associated with Q-277 and Q-422. Loss of protein secretion; when associated with Q-277 and Q-422. Ref.10 | ||||||
| Mutagenesis | 277 | 1 | N → Q: Affects glycosylation; when associated with Q-192 and Q-422. Loss of protein secretion; when associated with Q-192 and Q-422. Ref.10 | ||||||
| Mutagenesis | 422 | 1 | N → Q: Affects glycosylation; when associated with Q-192 and Q-277. Loss of protein secretion; when associated with Q-192 and Q-277. Ref.10 | ||||||
Sequences
| ||||||||||||||||||||||||||||||
References
| « Hide 'large scale' references | |
| [1] | "A novel gene, LGI1, from 10q24 is rearranged and downregulated in malignant brain tumors." Chernova O.B., Somerville R.P., Cowell J.K. Oncogene 17:2873-2881(1998) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1). Tissue: Fetal brain. |
| [2] | "Mutations in the LGI1/Epitempin gene on 10q24 cause autosomal dominant lateral temporal epilepsy." Morante-Redolat J.M., Gorostidi-Pagola A., Piquer-Sirerol S., Saenz A., Poza J.J., Galan J., Gesk S., Sarafidou T., Mautner V.F., Binelli S., Staub E., Hinzmann B., French L., Prud'homme J.-F., Passarelli D., Scannapieco P., Tassinari C.A., Avanzini G. Lopez de Munain A.Hum. Mol. Genet. 11:1119-1128(2002) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 2), DISEASE. |
| [3] | "The secreted protein discovery initiative (SPDI), a large-scale effort to identify novel human secreted and transmembrane proteins: a bioinformatics assessment." Clark H.F., Gurney A.L., Abaya E., Baker K., Baldwin D.T., Brush J., Chen J., Chow B., Chui C., Crowley C., Currell B., Deuel B., Dowd P., Eaton D., Foster J.S., Grimaldi C., Gu Q., Hass P.E. Gray A.M.Genome Res. 13:2265-2270(2003) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 1). |
| [4] | "Complete sequencing and characterization of 21,243 full-length human cDNAs." Ota T., Suzuki Y., Nishikawa T., Otsuki T., Sugiyama T., Irie R., Wakamatsu A., Hayashi K., Sato H., Nagai K., Kimura K., Makita H., Sekine M., Obayashi M., Nishi T., Shibahara T., Tanaka T., Ishii S. Sugano S.Nat. Genet. 36:40-45(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORMS 1 AND 3). Tissue: Brain and Trachea. |
| [5] | "The DNA sequence and comparative analysis of human chromosome 10." Deloukas P., Earthrowl M.E., Grafham D.V., Rubenfield M., French L., Steward C.A., Sims S.K., Jones M.C., Searle S., Scott C., Howe K., Hunt S.E., Andrews T.D., Gilbert J.G.R., Swarbreck D., Ashurst J.L., Taylor A., Battles J. Rogers J.Nature 429:375-381(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [6] | Mural R.J., Istrail S., Sutton G.G., Florea L., Halpern A.L., Mobarry C.M., Lippert R., Walenz B., Shatkay H., Dew I., Miller J.R., Flanigan M.J., Edwards N.J., Bolanos R., Fasulo D., Halldorsson B.V., Hannenhalli S., Turner R. Venter J.C.Submitted (SEP-2005) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [7] | "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA] (ISOFORM 1). Tissue: Brain. |
| [8] | "LGI1, a putative tumor metastasis suppressor gene, controls in vitro invasiveness and expression of matrix metalloproteinases in glioma cells through the ERK1/2 pathway." Kunapuli P., Kasyapa C.S., Hawthorn L., Cowell J.K. J. Biol. Chem. 279:23151-23157(2004) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION. |
| [9] | Erratum Kunapuli P., Kasyapa C.S., Hawthorn L., Cowell J.K. J. Biol. Chem. 282:2752-2752(2007) |
| [10] | "The epilepsy gene LGI1 encodes a secreted glycoprotein that binds to the cell surface." Sirerol-Piquer M.S., Ayerdi-Izquierdo A., Morante-Redolat J.M., Herranz-Perez V., Favell K., Barker P.A., Perez-Tur J. Hum. Mol. Genet. 15:3436-3445(2006) [PubMed] [Europe PMC] [Abstract] Cited for: SUBCELLULAR LOCATION, GLYCOSYLATION, MUTAGENESIS OF ASN-192; ASN-277 AND ASN-422, CHARACTERIZATION OF VARIANTS ETL1 ARG-46; ARG-145; ARG-200; CYS-318 AND ALA-383. |
| [11] | "Increased expression of LGI1 gene triggers growth inhibition and apoptosis of neuroblastoma cells." Gabellini N., Masola V., Quartesan S., Oselladore B., Nobile C., Michelucci R., Curtarello M., Parolin C., Palu G. J. Cell. Physiol. 207:711-721(2006) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION, INDUCTION, TISSUE SPECIFICITY. |
| [12] | "The LGI1/epitempin gene encodes two protein isoforms differentially expressed in human brain." Furlan S., Roncaroli F., Forner F., Vitiello L., Calabria E., Piquer-Sirerol S., Valle G., Perez-Tur J., Michelucci R., Nobile C. J. Neurochem. 98:985-991(2006) [PubMed] [Europe PMC] [Abstract] Cited for: SUBCELLULAR LOCATION, ALTERNATIVE SPLICING, TISSUE SPECIFICITY. |
| [13] | "Two novel epilepsy-linked mutations leading to a loss of function of LGI1." Chabrol E., Popescu C., Gourfinkel-An I., Trouillard O., Depienne C., Senechal K., Baulac M., LeGuern E., Baulac S. Arch. Neurol. 64:217-222(2007) [PubMed] [Europe PMC] [Abstract] Cited for: SUBCELLULAR LOCATION, VARIANT ETL1 PRO-232, CHARACTERIZATION OF VARIANTS ETL1 PRO-232 AND ALA-383. |
| [14] | "LGI1 mutations in autosomal dominant and sporadic lateral temporal epilepsy." Nobile C., Michelucci R., Andreazza S., Pasini E., Tosatto S.C., Striano P. Hum. Mutat. 30:530-536(2009) [PubMed] [Europe PMC] [Abstract] Cited for: REVIEW ON VARIANTS. |
| [15] | "Mutations in LGI1 cause autosomal-dominant partial epilepsy with auditory features." Kalachikov S., Evgrafov O., Ross B., Winawer M., Barker-Cummings C., Boneschi F.M., Choi C., Morozov P., Das K., Teplitskaya E., Yu A., Cayanis E., Penchaszadeh G., Kottmann A.H., Pedley T.A., Hauser W.A., Ottman R., Gilliam T.C. Nat. Genet. 30:335-341(2002) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT ETL1 ALA-383. |
| [16] | "LGI1 is mutated in familial temporal lobe epilepsy characterized by aphasic seizures." Gu W., Brodtkorb E., Steinlein O.K. Ann. Neurol. 52:364-367(2002) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT ETL1 ARG-46. |
| [17] | "Epilepsy with auditory features: a LGI1 gene mutation suggests a loss-of-function mechanism." Pizzuti A., Flex E., Di Bonaventura C., Dottorini T., Egeo G., Manfredi M., Dallapiccola B., Giallonardo A.T. Ann. Neurol. 53:396-399(2003) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT ETL1 ARG-26. |
| [18] | "Novel LGI1 mutation in a family with autosomal dominant partial epilepsy with auditory features." Fertig E., Lincoln A., Martinuzzi A., Mattson R.H., Hisama F.M. Neurology 60:1687-1690(2003) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT ETL1 CYS-318. |
| [19] | "LGI1 mutations in temporal lobe epilepsies." Berkovic S.F., Izzillo P., McMahon J.M., Harkin L.A., McIntosh A.M., Phillips H.A., Briellmann R.S., Wallace R.H., Mazarib A., Neufeld M.Y., Korczyn A.D., Scheffer I.E., Mulley J.C. Neurology 62:1115-1119(2004) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANTS ETL1 GLY-42 AND LEU-473. |
| [20] | "A de novo LGI1 mutation causing idiopathic partial epilepsy with telephone-induced seizures." Michelucci R., Mecarelli O., Bovo G., Bisulli F., Testoni S., Striano P., Striano S., Tinuper P., Nobile C. Neurology 68:2150-2151(2007) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT ETL1 TRP-136. |
| [21] | "A novel loss-of-function LGI1 mutation linked to autosomal dominant lateral temporal epilepsy." Striano P., de Falco A., Diani E., Bovo G., Furlan S., Vitiello L., Pinardi F., Striano S., Michelucci R., de Falco F.A., Nobile C. Arch. Neurol. 65:939-942(2008) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT ETL1 LYS-122. |
| [22] | "Drug resistant ADLTE and recurrent partial status epilepticus with dysphasic features in a family with a novel LGI1mutation: electroclinical, genetic, and EEG/fMRI findings." Bonaventura C.D., Carni M., Diani E., Fattouch J., Vaudano E.A., Egeo G., Pantano P., Maraviglia B., Bozzao L., Manfredi M., Prencipe M., Giallonardo T.A., Nobile C. Epilepsia 50:2481-2486(2009) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT ETL1 LYS-123. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | AF055636 mRNA. Translation: AAC99316.1. AF473548 mRNA. Translation: AAM22074.1. AY358885 mRNA. Translation: AAQ89244.1. AK289706 mRNA. Translation: BAF82395.1. AK303956 mRNA. Translation: BAG64882.1. AL157396, AL358154 Genomic DNA. Translation: CAH73837.1. AL157396, AL358154 Genomic DNA. Translation: CAH73838.1. AL358154, AL157396 Genomic DNA. Translation: CAI14981.1. AL358154, AL157396 Genomic DNA. Translation: CAI14982.1. CH471066 Genomic DNA. Translation: EAW50052.1. BC022500 mRNA. Translation: AAH22500.1. |
| IPI | IPI00021091. IPI00334395. IPI00945485. |
| RefSeq | NP_005088.1. NM_005097.2. |
| UniGene | Hs.533670. |
3D structure databases | |
| ProteinModelPortal | O95970. |
| ModBase | Search... |
Protein-protein interaction databases | |
| STRING | 9606.ENSP00000360472. |
PTM databases | |
| PhosphoSite | O95970. |
Proteomic databases | |
| PaxDb | O95970. |
| PRIDE | O95970. |
Protocols and materials databases | |
| DNASU | 9211. |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| Ensembl | ENST00000371413; ENSP00000360467; ENSG00000108231. ENST00000371418; ENSP00000360472; ENSG00000108231. ENST00000542308; ENSP00000440763; ENSG00000108231. |
| GeneID | 9211. |
| KEGG | hsa:9211. |
| UCSC | uc001kjc.4. human. uc010qnv.2. human. uc021pwk.1. human. |
Organism-specific databases | |
| CTD | 9211. |
| GeneCards | GC10P095507. |
| HGNC | HGNC:6572. LGI1. |
| HPA | HPA054482. |
| MIM | 600512. phenotype. 604619. gene. |
| neXtProt | NX_O95970. |
| Orphanet | 101046. Autosomal dominant lateral temporal lobe epilepsy. |
| PharmGKB | PA30349. |
| GenAtlas | Search... |
Phylogenomic databases | |
| eggNOG | NOG304734. |
| HOVERGEN | HBG036744. |
| InParanoid | O95970. |
| OMA | GFANKFI. |
| OrthoDB | EOG4PZJ6C. |
| PhylomeDB | O95970. |
Gene expression databases | |
| Bgee | O95970. |
| CleanEx | HS_LGI1. |
| Genevestigator | O95970. |
| GermOnline | ENSG00000108231. Homo sapiens. |
Family and domain databases | |
| InterPro | IPR000483. Cys-rich_flank_reg_C. IPR009039. EAR. IPR005492. EPTP. IPR003591. Leu-rich_rpt_typical-subtyp. IPR000372. LRR-contain_N. [Graphical view] |
| Pfam | PF03736. EPTP. 7 hits. [Graphical view] |
| SMART | SM00369. LRR_TYP. 2 hits. SM00082. LRRCT. 1 hit. SM00013. LRRNT. 1 hit. [Graphical view] |
| PROSITE | PS50912. EAR. 7 hits. [Graphical view] |
| ProtoNet | Search... |
Other | |
| GenomeRNAi | 9211. |
| NextBio | 34531. |
| SOURCE | Search... |
Entry information
| Entry name | LGI1_HUMAN | ||||||||
| Accession | Primary (citable) accession number: O95970 Secondary accession number(s): A8K0Z1 Q96LF5 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
| Disclaimer | Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. | ||||||||
Relevant documents
| Human chromosome 10 Human chromosome 10: entries, gene names and cross-references to MIM |
| Human entries with polymorphisms or disease mutations List of human entries with polymorphisms or disease mutations |
| Human polymorphisms and disease mutations Index of human polymorphisms and disease mutations |
| MIM cross-references Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot |
| SIMILARITY comments Index of protein domains and families |

Clusters with
