Incidental Mutation 'R0034:Atxn7'
ID 64600
Institutional Source Beutler Lab
Gene Symbol Atxn7
Ensembl Gene ENSMUSG00000021738
Gene Name ataxin 7
Synonyms Sca7, A430107N12Rik, ataxin-7
MMRRC Submission 038328-MU
Accession Numbers
Essential gene? Non essential (E-score: 0.000) question?
Stock # R0034 (G1)
Quality Score 93
Status Validated
Chromosome 14
Chromosomal Location 8362461-8508323 bp(-) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) A to T at 14100846 bp (GRCm38)
Zygosity Heterozygous
Amino Acid Change Histidine to Leucine at position 844 (H844L)
Ref Sequence ENSEMBL: ENSMUSP00000153613 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000022257] [ENSMUST00000223714] [ENSMUST00000223880]
AlphaFold Q8R4I1
Predicted Effect possibly damaging
Transcript: ENSMUST00000022257
AA Change: H844L

PolyPhen 2 Score 0.928 (Sensitivity: 0.81; Specificity: 0.94)
SMART Domains Protein: ENSMUSP00000022257
Gene: ENSMUSG00000021738
AA Change: H844L

DomainStartEndE-ValueType
low complexity region 13 47 N/A INTRINSIC
low complexity region 50 66 N/A INTRINSIC
ZnF_C2H2 135 157 2.47e1 SMART
low complexity region 174 197 N/A INTRINSIC
low complexity region 202 218 N/A INTRINSIC
Pfam:SCA7 313 381 1.4e-30 PFAM
low complexity region 393 413 N/A INTRINSIC
low complexity region 470 484 N/A INTRINSIC
low complexity region 619 647 N/A INTRINSIC
low complexity region 675 713 N/A INTRINSIC
Predicted Effect probably damaging
Transcript: ENSMUST00000223714
AA Change: H844L

PolyPhen 2 Score 0.957 (Sensitivity: 0.78; Specificity: 0.95)
Predicted Effect possibly damaging
Transcript: ENSMUST00000223880
AA Change: H844L

PolyPhen 2 Score 0.928 (Sensitivity: 0.81; Specificity: 0.94)
Predicted Effect noncoding transcript
Transcript: ENSMUST00000223932
Predicted Effect probably benign
Transcript: ENSMUST00000224315
Meta Mutation Damage Score 0.3376 question?
Coding Region Coverage
  • 1x: 99.4%
  • 3x: 98.9%
  • 10x: 97.8%
  • 20x: 96.4%
Validation Efficiency 98% (64/65)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] The autosomal dominant cerebellar ataxias (ADCA) are a heterogeneous group of neurodegenerative disorders characterized by progressive degeneration of the cerebellum, brain stem and spinal cord. Clinically, ADCA has been divided into three groups: ADCA types I-III. ADCAI is genetically heterogeneous, with five genetic loci, designated spinocerebellar ataxia (SCA) 1, 2, 3, 4 and 6, being assigned to five different chromosomes. ADCAII, which always presents with retinal degeneration (SCA7), and ADCAIII often referred to as the 'pure' cerebellar syndrome (SCA5), are most likely homogeneous disorders. Several SCA genes have been cloned and shown to contain CAG repeats in their coding regions. ADCA is caused by the expansion of the CAG repeats, producing an elongated polyglutamine tract in the corresponding protein. The expanded repeats are variable in size and unstable, usually increasing in size when transmitted to successive generations. This locus has been mapped to chromosome 3, and it has been determined that the diseased allele associated with spinocerebellar ataxia-7 contains 37-306 CAG repeats (near the N-terminus), compared to 4-35 in the normal allele. The encoded protein is a component of the SPT3/TAF9/GCN5 acetyltransferase (STAGA) and TBP-free TAF-containing (TFTC) chromatin remodeling complexes, and it thus plays a role in transcriptional regulation. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2016]
PHENOTYPE: Heterozygotes for a targeted mutation with an expanded polyglutamine tract exhibit impaired coordination, ataxia, reduced growth, kyphosis, eye defects, poor reproduction, and high mortality at around 4 months. Homozygotes die at 7-8 weeks of age. [provided by MGI curators]
Allele List at MGI
Other mutations in this stock
Total: 58 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
9430038I01Rik C T 7: 136,989,321 (GRCm39) R60Q probably benign Het
Angpt4 C T 2: 151,771,311 (GRCm39) T209I probably benign Het
Ap3b1 T C 13: 94,616,393 (GRCm39) probably benign Het
Aplp1 A C 7: 30,143,867 (GRCm39) V56G probably damaging Het
Asns G A 6: 7,676,299 (GRCm39) P419L probably damaging Het
Cd14 A G 18: 36,859,288 (GRCm39) Y56H probably benign Het
Cd300lb C T 11: 114,819,225 (GRCm39) V135I probably damaging Het
Cep152 C T 2: 125,425,813 (GRCm39) A851T probably benign Het
Cfap74 C T 4: 155,545,344 (GRCm39) probably benign Het
Col28a1 T A 6: 8,175,708 (GRCm39) I47L probably benign Het
Dnaaf9 T C 2: 130,578,492 (GRCm39) H664R probably damaging Het
Eef1d T C 15: 75,774,808 (GRCm39) T200A probably benign Het
Exoc1l A G 5: 76,664,377 (GRCm39) I155M probably damaging Het
Faap100 A T 11: 120,262,973 (GRCm39) M795K probably benign Het
Gabpb1 C T 2: 126,500,454 (GRCm39) R15Q possibly damaging Het
Gata4 C A 14: 63,438,933 (GRCm39) M381I probably benign Het
Gm5114 A G 7: 39,058,282 (GRCm39) S446P possibly damaging Het
Gnb1 T A 4: 155,636,146 (GRCm39) N155K probably benign Het
Haspin G A 11: 73,029,044 (GRCm39) T15M probably damaging Het
Heatr5a A G 12: 51,971,955 (GRCm39) L745P probably damaging Het
Kcng3 T A 17: 83,895,812 (GRCm39) probably benign Het
Kif15 A T 9: 122,828,350 (GRCm39) N887I possibly damaging Het
Kif26a T C 12: 112,135,397 (GRCm39) probably benign Het
Kif9 G A 9: 110,348,679 (GRCm39) C738Y probably benign Het
Kifc2 G T 15: 76,551,300 (GRCm39) C613F probably benign Het
Klf12 A G 14: 100,224,865 (GRCm39) probably null Het
Lrp1 A T 10: 127,381,520 (GRCm39) I3826N probably benign Het
Map2k4 A G 11: 65,610,437 (GRCm39) probably benign Het
Myo7b A G 18: 32,093,913 (GRCm39) S2006P probably damaging Het
Or51m1 T C 7: 103,578,708 (GRCm39) V226A probably benign Het
Pax4 T C 6: 28,442,448 (GRCm39) T285A probably benign Het
Pcdhb5 A G 18: 37,455,137 (GRCm39) N506D probably damaging Het
Pkhd1l1 G A 15: 44,367,405 (GRCm39) G768S probably benign Het
Plb1 G T 5: 32,430,457 (GRCm39) G138V probably benign Het
Poln A C 5: 34,272,762 (GRCm39) V398G possibly damaging Het
Poteg A G 8: 27,952,105 (GRCm39) probably benign Het
Rapgef1 C A 2: 29,614,780 (GRCm39) probably benign Het
Rbm43 A T 2: 51,815,722 (GRCm39) D166E probably benign Het
Rhobtb2 T C 14: 70,026,137 (GRCm39) T602A probably benign Het
Samd3 G A 10: 26,147,398 (GRCm39) probably benign Het
Sbno2 A C 10: 79,894,174 (GRCm39) probably benign Het
Sec1 A G 7: 45,328,759 (GRCm39) V96A probably benign Het
Senp7 A C 16: 55,973,933 (GRCm39) S385R possibly damaging Het
Sgk3 T C 1: 9,955,902 (GRCm39) V301A probably damaging Het
Sgpl1 A T 10: 60,938,392 (GRCm39) M467K probably damaging Het
Slc22a26 A G 19: 7,779,618 (GRCm39) I66T probably benign Het
Stra6 G A 9: 58,058,752 (GRCm39) probably null Het
Tfrc T A 16: 32,434,214 (GRCm39) probably null Het
Tmem30b T C 12: 73,592,779 (GRCm39) Y112C probably damaging Het
Trap1 A T 16: 3,886,894 (GRCm39) probably benign Het
Trpc1 A G 9: 95,631,814 (GRCm39) S43P probably damaging Het
Tsku T C 7: 98,001,870 (GRCm39) T154A possibly damaging Het
Uroc1 T C 6: 90,322,292 (GRCm39) V272A probably damaging Het
Vmn1r69 T A 7: 10,314,738 (GRCm39) probably benign Het
Vmn2r1 T A 3: 63,997,435 (GRCm39) W364R probably damaging Het
Wnk2 G T 13: 49,221,556 (GRCm39) T377K possibly damaging Het
Zfta C A 19: 7,397,724 (GRCm39) H90Q probably damaging Het
Zscan20 T C 4: 128,479,455 (GRCm39) N1012S probably damaging Het
Other mutations in Atxn7
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00402:Atxn7 APN 14 14,096,324 (GRCm38) splice site probably benign
IGL00782:Atxn7 APN 14 14,096,218 (GRCm38) missense possibly damaging 0.78
IGL01405:Atxn7 APN 14 14,100,105 (GRCm38) missense probably benign 0.00
IGL02828:Atxn7 APN 14 14,090,056 (GRCm38) missense probably damaging 1.00
IGL03119:Atxn7 APN 14 14,100,734 (GRCm38) missense probably damaging 1.00
IGL03139:Atxn7 APN 14 14,052,994 (GRCm38) missense probably damaging 0.97
IGL03282:Atxn7 APN 14 14,100,564 (GRCm38) missense probably damaging 0.99
IGL03387:Atxn7 APN 14 14,087,273 (GRCm38) splice site probably benign
Estes_park UTSW 14 14,096,317 (GRCm38) critical splice donor site probably null
Lumpy UTSW 14 14,089,446 (GRCm38) nonsense probably null
Oestes_park UTSW 14 14,096,268 (GRCm38) nonsense probably null
R0408:Atxn7 UTSW 14 14,100,317 (GRCm38) missense probably damaging 1.00
R0853:Atxn7 UTSW 14 14,089,465 (GRCm38) splice site probably benign
R1169:Atxn7 UTSW 14 14,095,468 (GRCm38) missense possibly damaging 0.81
R1678:Atxn7 UTSW 14 14,096,239 (GRCm38) missense probably damaging 1.00
R1802:Atxn7 UTSW 14 14,089,419 (GRCm38) missense probably benign 0.25
R2078:Atxn7 UTSW 14 14,052,975 (GRCm38) missense probably damaging 0.99
R2275:Atxn7 UTSW 14 14,013,268 (GRCm38) missense possibly damaging 0.85
R2394:Atxn7 UTSW 14 14,100,237 (GRCm38) missense probably damaging 1.00
R4118:Atxn7 UTSW 14 14,100,308 (GRCm38) missense probably benign 0.00
R4230:Atxn7 UTSW 14 14,100,381 (GRCm38) missense probably benign 0.00
R4588:Atxn7 UTSW 14 14,096,268 (GRCm38) nonsense probably null
R4688:Atxn7 UTSW 14 14,089,288 (GRCm38) missense probably benign 0.00
R4935:Atxn7 UTSW 14 14,100,401 (GRCm38) missense probably benign
R5041:Atxn7 UTSW 14 14,096,317 (GRCm38) critical splice donor site probably null
R5185:Atxn7 UTSW 14 14,090,063 (GRCm38) missense probably benign 0.04
R5561:Atxn7 UTSW 14 14,089,260 (GRCm38) missense probably benign 0.19
R5641:Atxn7 UTSW 14 14,013,638 (GRCm38) missense probably damaging 0.99
R6490:Atxn7 UTSW 14 14,089,446 (GRCm38) nonsense probably null
R6549:Atxn7 UTSW 14 14,013,087 (GRCm38) missense probably damaging 0.99
R6623:Atxn7 UTSW 14 14,099,972 (GRCm38) missense probably damaging 1.00
R6950:Atxn7 UTSW 14 14,095,511 (GRCm38) missense probably damaging 1.00
R7054:Atxn7 UTSW 14 14,100,878 (GRCm38) missense probably benign 0.08
R7402:Atxn7 UTSW 14 14,095,427 (GRCm38) missense probably damaging 0.98
R7762:Atxn7 UTSW 14 14,100,467 (GRCm38) missense probably damaging 1.00
R8432:Atxn7 UTSW 14 14,013,635 (GRCm38) missense probably benign 0.06
R8786:Atxn7 UTSW 14 14,103,316 (GRCm38) missense possibly damaging 0.78
R9238:Atxn7 UTSW 14 14,089,441 (GRCm38) missense probably damaging 1.00
Predicted Primers PCR Primer
(F):5'- TGTAATGGTGAACAGCAGCGACTC -3'
(R):5'- CCTGCTTGACGCTTACTCAGGAAC -3'

Sequencing Primer
(F):5'- GCAGCGACTCCACTCTC -3'
(R):5'- GCTTACTCAGGAACACTGTTG -3'
Posted On 2013-08-06