Incidental Mutation 'R4494:Chrna4'
Institutional Source Beutler Lab
Gene Symbol Chrna4
Ensembl Gene ENSMUSG00000027577
Gene Namecholinergic receptor, nicotinic, alpha polypeptide 4
Synonymsalpha4 nAChR, Acra-4, a4 nicotinic receptor, Acra4, alpha4-nAChR
MMRRC Submission 041582-MU
Accession Numbers
Is this an essential gene? Probably non essential (E-score: 0.158) question?
Stock #R4494 (G1)
Quality Score225
Status Not validated
Chromosomal Location181018380-181043546 bp(-) (GRCm38)
Type of Mutationmissense
DNA Base Change (assembly) T to A at 181028488 bp
Amino Acid Change Isoleucine to Phenylalanine at position 492 (I492F)
Ref Sequence ENSEMBL: ENSMUSP00000066338 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000067120] [ENSMUST00000108851]
Predicted Effect probably damaging
Transcript: ENSMUST00000067120
AA Change: I492F

PolyPhen 2 Score 0.976 (Sensitivity: 0.76; Specificity: 0.96)
SMART Domains Protein: ENSMUSP00000066338
Gene: ENSMUSG00000027577
AA Change: I492F

signal peptide 1 30 N/A INTRINSIC
Pfam:Neur_chan_LBD 39 245 1.4e-76 PFAM
Pfam:Neur_chan_memb 252 620 1.9e-107 PFAM
Predicted Effect probably benign
Transcript: ENSMUST00000108851
AA Change: I492F

PolyPhen 2 Score 0.142 (Sensitivity: 0.92; Specificity: 0.86)
SMART Domains Protein: ENSMUSP00000104479
Gene: ENSMUSG00000027577
AA Change: I492F

signal peptide 1 30 N/A INTRINSIC
Pfam:Neur_chan_LBD 39 245 8.4e-79 PFAM
Pfam:Neur_chan_memb 252 620 3.3e-112 PFAM
Predicted Effect noncoding transcript
Transcript: ENSMUST00000135766
SMART Domains Protein: ENSMUSP00000125724
Gene: ENSMUSG00000027577

signal peptide 1 30 N/A INTRINSIC
Pfam:Neur_chan_LBD 39 130 9.2e-37 PFAM
Predicted Effect probably benign
Transcript: ENSMUST00000198922
Coding Region Coverage
  • 1x: 99.2%
  • 3x: 98.6%
  • 10x: 97.2%
  • 20x: 95.1%
Validation Efficiency
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes a nicotinic acetylcholine receptor, which belongs to a superfamily of ligand-gated ion channels that play a role in fast signal transmission at synapses. These pentameric receptors can bind acetylcholine, which causes an extensive change in conformation that leads to the opening of an ion-conducting channel across the plasma membrane. This protein is an integral membrane receptor subunit that can interact with either nAChR beta-2 or nAChR beta-4 to form a functional receptor. Mutations in this gene cause nocturnal frontal lobe epilepsy type 1. Polymorphisms in this gene that provide protection against nicotine addiction have been described. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2012]
PHENOTYPE: Nullizygous mice may show reduced chemically-elicited analgesia, susceptibility to seizures, increased anxiety, and altered behavioral responses to nicotine or a new environment. Homozygotes for any of several knock-in alleles exhibit altered nervous system physiology and/or sensitivity to nicotine. [provided by MGI curators]
Allele List at MGI
Other mutations in this stock
Total: 52 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Atf7ip T A 6: 136,563,749 probably null Het
Cacna1b T C 2: 24,652,938 T1301A probably damaging Het
Calcr A T 6: 3,708,484 probably null Het
Camsap1 T C 2: 25,952,758 D262G probably damaging Het
Ccdc141 A G 2: 77,132,297 V101A probably damaging Het
Ccdc170 T C 10: 4,514,128 Y36H probably damaging Het
Cd177 A T 7: 24,752,003 S492T probably benign Het
Cit T C 5: 115,873,984 Y217H probably damaging Het
Cnbd1 T A 4: 19,098,150 D90V probably benign Het
Cryba2 A G 1: 74,890,630 F116S probably damaging Het
Ctbp1 T C 5: 33,250,869 T240A possibly damaging Het
D130043K22Rik C T 13: 24,871,356 S501L probably benign Het
Ddhd2 A G 8: 25,738,234 F553S probably benign Het
Ddr2 C A 1: 169,988,414 G575W probably damaging Het
Dip2c T C 13: 9,571,062 V537A possibly damaging Het
Dnah12 C T 14: 26,871,855 A752V probably damaging Het
Dnah7a T C 1: 53,449,038 D3260G probably benign Het
Efemp2 T A 19: 5,480,311 C309S probably damaging Het
Fam46a A G 9: 85,325,047 S233P probably damaging Het
Gse1 G A 8: 120,570,814 probably benign Het
Hspa4l T C 3: 40,753,204 S53P possibly damaging Het
Ighv5-4 T C 12: 113,597,584 D72G probably benign Het
Igkv15-103 A G 6: 68,437,796 N73S probably benign Het
Igsf11 T G 16: 39,011,341 N183K possibly damaging Het
Kcnh8 GAGACCAACGAGCAGCTGATGCTTCAGA GAGA 17: 52,725,906 probably benign Het
Kcnk18 T C 19: 59,234,831 V136A probably damaging Het
Krt75 A T 15: 101,571,701 Y240* probably null Het
Lyst G A 13: 13,635,383 R546H probably damaging Het
Man2a2 C T 7: 80,359,275 probably null Het
Mme A G 3: 63,347,192 N491S probably benign Het
Mrc2 G A 11: 105,348,431 probably null Het
Msi2 T C 11: 88,717,359 D39G possibly damaging Het
Naa60 T A 16: 3,900,721 C122* probably null Het
Nes A G 3: 87,976,813 E793G probably damaging Het
Nfkb2 A G 19: 46,308,439 D316G probably damaging Het
Nme6 C T 9: 109,842,054 L121F probably damaging Het
Olfr1297 T A 2: 111,621,148 K309* probably null Het
Otud1 C T 2: 19,659,335 T425I probably damaging Het
Pimreg T C 11: 72,045,138 V149A probably benign Het
Plbd1 T C 6: 136,613,858 I437V probably damaging Het
Prlhr A T 19: 60,467,081 M349K probably benign Het
Slc1a3 G A 15: 8,639,095 T462I probably damaging Het
Slc25a26 A G 6: 94,598,403 T198A probably damaging Het
Stkld1 A G 2: 26,946,626 N268S probably benign Het
Svop T C 5: 114,045,627 T195A probably damaging Het
Syt6 A G 3: 103,585,630 E66G probably damaging Het
Tas2r129 A G 6: 132,951,354 I85V probably benign Het
Tprn T C 2: 25,268,892 S643P probably damaging Het
Ush2a C T 1: 188,553,276 T2003I possibly damaging Het
Vmn2r17 T A 5: 109,428,469 V402E probably damaging Het
Vmn2r3 C G 3: 64,275,271 G336R probably damaging Het
Wdr89 A T 12: 75,632,747 D244E probably damaging Het
Other mutations in Chrna4
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00815:Chrna4 APN 2 181029391 missense probably benign 0.09
IGL00914:Chrna4 APN 2 181029031 missense probably damaging 1.00
IGL01511:Chrna4 APN 2 181028668 missense probably benign 0.13
IGL02517:Chrna4 APN 2 181029133 missense probably benign 0.01
IGL02715:Chrna4 APN 2 181029581 unclassified probably benign
R1168:Chrna4 UTSW 2 181034138 missense possibly damaging 0.61
R1475:Chrna4 UTSW 2 181029379 missense probably benign 0.44
R1572:Chrna4 UTSW 2 181029307 missense possibly damaging 0.95
R4428:Chrna4 UTSW 2 181028620 missense probably damaging 0.99
R4429:Chrna4 UTSW 2 181028620 missense probably damaging 0.99
R4431:Chrna4 UTSW 2 181028620 missense probably damaging 0.99
R4664:Chrna4 UTSW 2 181037493 missense probably damaging 1.00
R4666:Chrna4 UTSW 2 181037493 missense probably damaging 1.00
R4931:Chrna4 UTSW 2 181028872 missense probably benign 0.00
R5144:Chrna4 UTSW 2 181024830 missense probably damaging 1.00
R5556:Chrna4 UTSW 2 181033980 missense possibly damaging 0.94
R5633:Chrna4 UTSW 2 181029460 missense probably damaging 1.00
R5889:Chrna4 UTSW 2 181028658 missense probably damaging 1.00
R6056:Chrna4 UTSW 2 181029442 missense probably damaging 1.00
R6120:Chrna4 UTSW 2 181024806 missense probably damaging 1.00
R7030:Chrna4 UTSW 2 181029541 missense probably damaging 1.00
R7352:Chrna4 UTSW 2 181037474 missense probably damaging 0.97
R7694:Chrna4 UTSW 2 181018593 missense
Predicted Primers PCR Primer

Sequencing Primer
Posted On2015-07-21