Incidental Mutation 'P0005:Itpr1'
ID 7613
Institutional Source Beutler Lab
Gene Symbol Itpr1
Ensembl Gene ENSMUSG00000030102
Gene Name inositol 1,4,5-trisphosphate receptor 1
Synonyms opt, IP3R1, P400, wblo, Ip3r, Pcp-1, Itpr-1, InsP3R type I, Pcp1
MMRRC Submission 038262-MU
Accession Numbers
Essential gene? Possibly essential (E-score: 0.736) question?
Stock # P0005 (G1)
Quality Score
Status Validated
Chromosome 6
Chromosomal Location 108190057-108528070 bp(+) (GRCm39)
Type of Mutation missense
DNA Base Change (assembly) A to T at 108358218 bp (GRCm39)
Zygosity Heterozygous
Amino Acid Change Isoleucine to Phenylalanine at position 595 (I595F)
Ref Sequence ENSEMBL: ENSMUSP00000144880 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000032192] [ENSMUST00000203615] [ENSMUST00000203936]
AlphaFold no structure available at present
Predicted Effect probably damaging
Transcript: ENSMUST00000032192
AA Change: I595F

PolyPhen 2 Score 1.000 (Sensitivity: 0.00; Specificity: 1.00)
SMART Domains Protein: ENSMUSP00000032192
Gene: ENSMUSG00000030102
AA Change: I595F

DomainStartEndE-ValueType
MIR 112 166 7.99e-8 SMART
MIR 173 223 1.02e-5 SMART
MIR 231 287 2.33e-9 SMART
MIR 294 403 5.95e-16 SMART
Pfam:RYDR_ITPR 474 670 2.3e-61 PFAM
low complexity region 683 695 N/A INTRINSIC
low complexity region 884 895 N/A INTRINSIC
low complexity region 1004 1020 N/A INTRINSIC
Pfam:RYDR_ITPR 1183 1344 1.9e-14 PFAM
low complexity region 1758 1787 N/A INTRINSIC
Pfam:RIH_assoc 1959 2069 1.2e-33 PFAM
transmembrane domain 2274 2296 N/A INTRINSIC
Pfam:Ion_trans 2311 2600 9e-22 PFAM
coiled coil region 2683 2732 N/A INTRINSIC
Predicted Effect probably damaging
Transcript: ENSMUST00000203615
AA Change: I595F

PolyPhen 2 Score 1.000 (Sensitivity: 0.00; Specificity: 1.00)
SMART Domains Protein: ENSMUSP00000144880
Gene: ENSMUSG00000030102
AA Change: I595F

DomainStartEndE-ValueType
MIR 112 166 7.99e-8 SMART
MIR 173 223 1.02e-5 SMART
MIR 231 287 2.33e-9 SMART
MIR 294 403 5.95e-16 SMART
Pfam:RYDR_ITPR 474 670 2.3e-61 PFAM
low complexity region 683 695 N/A INTRINSIC
low complexity region 884 895 N/A INTRINSIC
low complexity region 1004 1020 N/A INTRINSIC
Pfam:RYDR_ITPR 1183 1344 1.9e-14 PFAM
low complexity region 1757 1786 N/A INTRINSIC
Pfam:RIH_assoc 1958 2068 1.2e-33 PFAM
transmembrane domain 2273 2295 N/A INTRINSIC
Pfam:Ion_trans 2310 2599 9e-22 PFAM
coiled coil region 2682 2731 N/A INTRINSIC
Predicted Effect probably benign
Transcript: ENSMUST00000203936
SMART Domains Protein: ENSMUSP00000145526
Gene: ENSMUSG00000030102

DomainStartEndE-ValueType
MIR 5 61 1.3e-11 SMART
MIR 68 162 1.6e-13 SMART
Predicted Effect noncoding transcript
Transcript: ENSMUST00000203995
Meta Mutation Damage Score 0.9180 question?
Coding Region Coverage
  • 1x: 85.5%
  • 3x: 80.5%
  • 10x: 66.1%
  • 20x: 49.6%
Validation Efficiency 95% (104/109)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene encodes an intracellular receptor for inositol 1,4,5-trisphosphate. Upon stimulation by inositol 1,4,5-trisphosphate, this receptor mediates calcium release from the endoplasmic reticulum. Mutations in this gene cause spinocerebellar ataxia type 15, a disease associated with an heterogeneous group of cerebellar disorders. Multiple transcript variants have been identified for this gene. [provided by RefSeq, Nov 2009]
PHENOTYPE: Most homozygotes for a targeted null mutation die in utero, while survivors exhibit severe ataxia, seizures, and lethality by weaning age. Homozygotes for a spontaneous mutation exhibit a postnatal phenotype similar to that of knockout mutants. [provided by MGI curators]
Allele List at MGI

All alleles(71) : Targeted(2) Gene trapped(67) Spontaneous(2)

Other mutations in this stock
Total: 20 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Atp13a1 T C 8: 70,256,397 (GRCm39) V845A possibly damaging Het
Casp6 T C 3: 129,705,792 (GRCm39) V153A probably benign Het
Col6a1 A G 10: 76,553,163 (GRCm39) probably benign Het
Dars2 A G 1: 160,881,509 (GRCm39) probably null Het
Hmgcll1 T A 9: 75,982,041 (GRCm39) M162K possibly damaging Het
Hydin A T 8: 111,220,921 (GRCm39) probably null Het
Ift74 A G 4: 94,550,813 (GRCm39) probably benign Het
Mgat4f T A 1: 134,315,646 (GRCm39) M15K probably benign Het
Mmp17 T C 5: 129,673,695 (GRCm39) V258A probably benign Het
Nek6 T C 2: 38,459,749 (GRCm39) probably null Het
Nomo1 A T 7: 45,686,981 (GRCm39) probably null Het
Nudt3 A G 17: 27,815,689 (GRCm39) probably benign Het
Pramel32 A G 4: 88,546,187 (GRCm39) L385P probably damaging Het
Prkg2 A C 5: 99,117,806 (GRCm39) F512V probably damaging Het
Ptp4a3 T A 15: 73,627,160 (GRCm39) D72E possibly damaging Het
Rpgrip1l A T 8: 92,025,853 (GRCm39) probably benign Het
Rrp9 G A 9: 106,358,376 (GRCm39) R101H probably benign Het
Slc7a6os T C 8: 106,931,154 (GRCm39) I161V probably benign Het
Tex15 T C 8: 34,060,896 (GRCm39) F109L probably benign Het
Tns2 A G 15: 102,022,491 (GRCm39) Q1188R probably damaging Het
Other mutations in Itpr1
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00979:Itpr1 APN 6 108,448,081 (GRCm39) missense probably damaging 0.98
IGL01073:Itpr1 APN 6 108,390,781 (GRCm39) missense probably benign 0.00
IGL01105:Itpr1 APN 6 108,358,294 (GRCm39) missense probably benign 0.00
IGL01296:Itpr1 APN 6 108,376,322 (GRCm39) missense probably damaging 1.00
IGL01325:Itpr1 APN 6 108,358,169 (GRCm39) missense probably benign 0.01
IGL01418:Itpr1 APN 6 108,316,585 (GRCm39) critical splice donor site probably null
IGL01464:Itpr1 APN 6 108,363,688 (GRCm39) missense possibly damaging 0.95
IGL01467:Itpr1 APN 6 108,465,457 (GRCm39) missense probably damaging 0.96
IGL01645:Itpr1 APN 6 108,450,560 (GRCm39) missense possibly damaging 0.91
IGL01672:Itpr1 APN 6 108,357,993 (GRCm39) nonsense probably null
IGL01969:Itpr1 APN 6 108,354,652 (GRCm39) missense probably damaging 1.00
IGL02164:Itpr1 APN 6 108,366,444 (GRCm39) missense probably benign 0.08
IGL02206:Itpr1 APN 6 108,526,781 (GRCm39) missense probably damaging 1.00
IGL02232:Itpr1 APN 6 108,394,884 (GRCm39) missense probably damaging 1.00
IGL02297:Itpr1 APN 6 108,316,478 (GRCm39) missense possibly damaging 0.84
IGL02434:Itpr1 APN 6 108,466,883 (GRCm39) splice site probably null
IGL02568:Itpr1 APN 6 108,316,515 (GRCm39) missense possibly damaging 0.82
IGL02992:Itpr1 APN 6 108,358,276 (GRCm39) missense probably damaging 1.00
IGL03109:Itpr1 APN 6 108,394,942 (GRCm39) missense probably damaging 1.00
IGL03130:Itpr1 APN 6 108,500,362 (GRCm39) missense probably benign 0.00
IGL03333:Itpr1 APN 6 108,357,871 (GRCm39) unclassified probably benign
aboriginal UTSW 6 108,492,908 (GRCm39) missense probably benign
approximation UTSW 6 108,371,802 (GRCm39) missense probably benign
estimate UTSW 6 108,366,514 (GRCm39) missense probably null 1.00
icarus UTSW 6 108,387,861 (GRCm39) missense probably damaging 1.00
marsupialized UTSW 6 108,371,034 (GRCm39) splice site probably null
primordial UTSW 6 108,495,716 (GRCm39) missense probably benign 0.06
roo UTSW 6 108,387,828 (GRCm39) missense probably benign 0.00
wallaby UTSW 6 108,366,348 (GRCm39) missense probably damaging 1.00
PIT4366001:Itpr1 UTSW 6 108,470,718 (GRCm39) nonsense probably null
R0019:Itpr1 UTSW 6 108,331,587 (GRCm39) missense probably damaging 1.00
R0128:Itpr1 UTSW 6 108,448,170 (GRCm39) splice site probably benign
R0129:Itpr1 UTSW 6 108,326,637 (GRCm39) missense probably damaging 1.00
R0135:Itpr1 UTSW 6 108,465,443 (GRCm39) splice site probably benign
R0244:Itpr1 UTSW 6 108,450,550 (GRCm39) missense probably benign 0.00
R0391:Itpr1 UTSW 6 108,355,128 (GRCm39) missense probably benign 0.22
R0543:Itpr1 UTSW 6 108,492,709 (GRCm39) splice site probably benign
R0647:Itpr1 UTSW 6 108,360,659 (GRCm39) missense probably damaging 1.00
R0766:Itpr1 UTSW 6 108,387,861 (GRCm39) missense probably damaging 1.00
R0971:Itpr1 UTSW 6 108,326,590 (GRCm39) missense possibly damaging 0.70
R1083:Itpr1 UTSW 6 108,487,657 (GRCm39) missense possibly damaging 0.92
R1277:Itpr1 UTSW 6 108,316,582 (GRCm39) missense probably benign 0.22
R1403:Itpr1 UTSW 6 108,366,514 (GRCm39) missense probably null 1.00
R1403:Itpr1 UTSW 6 108,366,514 (GRCm39) missense probably null 1.00
R1404:Itpr1 UTSW 6 108,363,609 (GRCm39) missense probably benign 0.04
R1404:Itpr1 UTSW 6 108,363,609 (GRCm39) missense probably benign 0.04
R1605:Itpr1 UTSW 6 108,326,620 (GRCm39) missense possibly damaging 0.77
R1661:Itpr1 UTSW 6 108,459,858 (GRCm39) missense probably benign 0.38
R1852:Itpr1 UTSW 6 108,363,667 (GRCm39) missense probably damaging 1.00
R1929:Itpr1 UTSW 6 108,470,716 (GRCm39) missense probably damaging 1.00
R2012:Itpr1 UTSW 6 108,417,497 (GRCm39) missense probably benign 0.02
R2027:Itpr1 UTSW 6 108,363,814 (GRCm39) missense possibly damaging 0.80
R2111:Itpr1 UTSW 6 108,355,270 (GRCm39) unclassified probably benign
R2166:Itpr1 UTSW 6 108,365,186 (GRCm39) missense probably damaging 1.00
R2272:Itpr1 UTSW 6 108,470,716 (GRCm39) missense probably damaging 1.00
R2484:Itpr1 UTSW 6 108,346,071 (GRCm39) missense probably damaging 1.00
R3115:Itpr1 UTSW 6 108,383,070 (GRCm39) missense possibly damaging 0.55
R3751:Itpr1 UTSW 6 108,326,641 (GRCm39) missense probably damaging 1.00
R3798:Itpr1 UTSW 6 108,358,231 (GRCm39) missense probably damaging 1.00
R3930:Itpr1 UTSW 6 108,371,802 (GRCm39) missense probably benign
R4081:Itpr1 UTSW 6 108,368,796 (GRCm39) missense probably damaging 1.00
R4119:Itpr1 UTSW 6 108,371,316 (GRCm39) missense probably benign
R4406:Itpr1 UTSW 6 108,331,624 (GRCm39) missense probably damaging 1.00
R4506:Itpr1 UTSW 6 108,409,647 (GRCm39) missense probably damaging 1.00
R4616:Itpr1 UTSW 6 108,458,184 (GRCm39) missense probably damaging 1.00
R4655:Itpr1 UTSW 6 108,458,254 (GRCm39) missense probably damaging 1.00
R4661:Itpr1 UTSW 6 108,387,892 (GRCm39) critical splice donor site probably null
R4760:Itpr1 UTSW 6 108,326,593 (GRCm39) missense probably benign 0.29
R4836:Itpr1 UTSW 6 108,366,498 (GRCm39) missense probably damaging 0.99
R4857:Itpr1 UTSW 6 108,387,828 (GRCm39) missense probably benign 0.00
R4876:Itpr1 UTSW 6 108,459,867 (GRCm39) missense probably damaging 0.97
R4939:Itpr1 UTSW 6 108,417,519 (GRCm39) nonsense probably null
R5076:Itpr1 UTSW 6 108,382,490 (GRCm39) splice site probably null
R5088:Itpr1 UTSW 6 108,366,348 (GRCm39) missense probably damaging 1.00
R5248:Itpr1 UTSW 6 108,519,023 (GRCm39) missense probably damaging 1.00
R5290:Itpr1 UTSW 6 108,383,106 (GRCm39) missense possibly damaging 0.95
R5308:Itpr1 UTSW 6 108,333,472 (GRCm39) missense probably damaging 1.00
R5339:Itpr1 UTSW 6 108,370,922 (GRCm39) missense probably damaging 1.00
R5368:Itpr1 UTSW 6 108,364,459 (GRCm39) missense probably damaging 1.00
R5369:Itpr1 UTSW 6 108,496,385 (GRCm39) missense probably damaging 0.99
R5419:Itpr1 UTSW 6 108,470,755 (GRCm39) missense possibly damaging 0.95
R5615:Itpr1 UTSW 6 108,465,561 (GRCm39) missense possibly damaging 0.71
R5779:Itpr1 UTSW 6 108,329,104 (GRCm39) missense probably damaging 1.00
R5781:Itpr1 UTSW 6 108,487,699 (GRCm39) missense probably benign 0.23
R5869:Itpr1 UTSW 6 108,450,490 (GRCm39) missense probably benign 0.30
R5903:Itpr1 UTSW 6 108,466,758 (GRCm39) intron probably benign
R5929:Itpr1 UTSW 6 108,400,297 (GRCm39) missense probably benign
R5956:Itpr1 UTSW 6 108,482,988 (GRCm39) missense probably benign 0.25
R6160:Itpr1 UTSW 6 108,495,716 (GRCm39) missense probably benign 0.06
R6163:Itpr1 UTSW 6 108,365,245 (GRCm39) missense probably damaging 1.00
R6169:Itpr1 UTSW 6 108,346,077 (GRCm39) missense probably damaging 1.00
R6237:Itpr1 UTSW 6 108,355,164 (GRCm39) missense possibly damaging 0.53
R6398:Itpr1 UTSW 6 108,482,864 (GRCm39) missense probably damaging 0.96
R6455:Itpr1 UTSW 6 108,394,933 (GRCm39) missense probably damaging 1.00
R6522:Itpr1 UTSW 6 108,365,237 (GRCm39) missense probably damaging 1.00
R6524:Itpr1 UTSW 6 108,340,644 (GRCm39) missense probably damaging 1.00
R6650:Itpr1 UTSW 6 108,371,034 (GRCm39) splice site probably null
R6806:Itpr1 UTSW 6 108,492,908 (GRCm39) missense probably benign
R6838:Itpr1 UTSW 6 108,448,152 (GRCm39) missense possibly damaging 0.87
R6841:Itpr1 UTSW 6 108,365,153 (GRCm39) missense probably damaging 1.00
R6896:Itpr1 UTSW 6 108,458,355 (GRCm39) missense probably damaging 1.00
R7014:Itpr1 UTSW 6 108,408,459 (GRCm39) critical splice donor site probably null
R7076:Itpr1 UTSW 6 108,365,257 (GRCm39) missense probably benign
R7116:Itpr1 UTSW 6 108,458,229 (GRCm39) missense probably damaging 0.99
R7152:Itpr1 UTSW 6 108,371,368 (GRCm39) critical splice donor site probably null
R7161:Itpr1 UTSW 6 108,363,601 (GRCm39) missense probably damaging 1.00
R7166:Itpr1 UTSW 6 108,355,151 (GRCm39) missense probably benign 0.06
R7241:Itpr1 UTSW 6 108,494,581 (GRCm39) critical splice donor site probably null
R7301:Itpr1 UTSW 6 108,518,985 (GRCm39) missense possibly damaging 0.86
R7330:Itpr1 UTSW 6 108,415,292 (GRCm39) missense probably benign 0.28
R7449:Itpr1 UTSW 6 108,366,345 (GRCm39) missense probably damaging 0.98
R7472:Itpr1 UTSW 6 108,380,357 (GRCm39) missense probably benign 0.05
R7502:Itpr1 UTSW 6 108,360,639 (GRCm39) missense probably benign 0.00
R7779:Itpr1 UTSW 6 108,500,309 (GRCm39) missense possibly damaging 0.75
R7828:Itpr1 UTSW 6 108,459,892 (GRCm39) missense probably damaging 1.00
R7854:Itpr1 UTSW 6 108,364,330 (GRCm39) missense probably damaging 1.00
R7974:Itpr1 UTSW 6 108,500,366 (GRCm39) missense possibly damaging 0.86
R7998:Itpr1 UTSW 6 108,394,909 (GRCm39) missense possibly damaging 0.88
R8039:Itpr1 UTSW 6 108,363,589 (GRCm39) missense probably damaging 1.00
R8136:Itpr1 UTSW 6 108,415,321 (GRCm39) missense probably benign 0.18
R8200:Itpr1 UTSW 6 108,371,826 (GRCm39) missense probably benign 0.00
R8242:Itpr1 UTSW 6 108,363,658 (GRCm39) missense probably benign 0.44
R8322:Itpr1 UTSW 6 108,365,190 (GRCm39) missense probably benign 0.05
R8377:Itpr1 UTSW 6 108,487,699 (GRCm39) missense probably benign 0.00
R8412:Itpr1 UTSW 6 108,340,581 (GRCm39) missense probably benign 0.07
R8443:Itpr1 UTSW 6 108,496,309 (GRCm39) missense probably damaging 0.99
R8669:Itpr1 UTSW 6 108,370,928 (GRCm39) missense probably damaging 0.99
R8697:Itpr1 UTSW 6 108,500,327 (GRCm39) missense probably damaging 1.00
R8744:Itpr1 UTSW 6 108,354,763 (GRCm39) missense possibly damaging 0.79
R8870:Itpr1 UTSW 6 108,365,172 (GRCm39) missense probably damaging 1.00
R8921:Itpr1 UTSW 6 108,355,159 (GRCm39) missense possibly damaging 0.87
R8961:Itpr1 UTSW 6 108,470,666 (GRCm39) missense possibly damaging 0.86
R9095:Itpr1 UTSW 6 108,364,352 (GRCm39) missense probably benign 0.02
R9205:Itpr1 UTSW 6 108,466,810 (GRCm39) missense probably damaging 0.99
R9282:Itpr1 UTSW 6 108,370,984 (GRCm39) missense probably damaging 1.00
R9323:Itpr1 UTSW 6 108,328,979 (GRCm39) missense probably damaging 1.00
R9376:Itpr1 UTSW 6 108,326,638 (GRCm39) missense probably damaging 0.99
R9392:Itpr1 UTSW 6 108,390,837 (GRCm39) missense probably benign
R9428:Itpr1 UTSW 6 108,378,308 (GRCm39) missense possibly damaging 0.84
R9621:Itpr1 UTSW 6 108,393,870 (GRCm39) missense probably damaging 1.00
R9632:Itpr1 UTSW 6 108,382,481 (GRCm39) missense possibly damaging 0.50
R9646:Itpr1 UTSW 6 108,371,845 (GRCm39) missense probably damaging 1.00
R9695:Itpr1 UTSW 6 108,378,311 (GRCm39) missense probably damaging 1.00
R9710:Itpr1 UTSW 6 108,382,481 (GRCm39) missense possibly damaging 0.50
R9721:Itpr1 UTSW 6 108,383,063 (GRCm39) missense probably damaging 0.96
R9780:Itpr1 UTSW 6 108,487,795 (GRCm39) missense probably benign 0.03
Z1176:Itpr1 UTSW 6 108,476,110 (GRCm39) missense probably damaging 1.00
Protein Function and Prediction

The Itpr1 gene encodes the inositol 1,4,5-triphosphate (IP3) receptor, an intracellular IP3-gated calcium channel that modulates intracellular calcium signaling (1;2).

Expression/Localization

ITPR1 mRNA was detected at embryonic day (E)8.5 in the heart, where it was enhanced in the posterior part of the primitive heart, including the atrium (3). ITPR1 mRNA expression extended to the ventricles through the AV canal at E9.5–10.5 (3).

Background

Mutations in ITPR1 have been shown to cause Spinocerebellar ataxia 15 (OMIM #606658), an autosomal dominant, adult-onset form of cerebellar ataxia.  Patients suffer from postural tremor, pyramidal tract affection, dorsal column involvement, and gaze palsy.

Cerebral knockdown of Itpr1 by antisense oligonucleotides resulted in a reversible antidepressant behavior; impairment of locomotor activity and spontaneous mobility in the knockdown mice was not observed (4). 

Itpr1tm1Tno/tm1Tno; MGI:2180360

Genetic background: 129S4/SvJae * C57BL/6

Itpr1-deficient mice generated by gene targeting die in utero, and that most animals that are born alive have severe ataxia (age of onset postnatal day 9) and seizures (apparent by P15) and die by the weaning period (5). Also, the mice had decreased brain size (~40% of normal) and abnormal excitatory postsynaptic currents (5).

Itpr1m1Asb/m1Asb; MGI: 3715928

involves: 129X1/SvJ * C57BL/6

These mice have an in-frame 18 bp deletion in exon 36.  These mice exhibit premature death post-weaning as well as paroxysmal movement disorder at P14 (6).

Itpr1opt/opt; MGI:1856981

involves: C57BLKS

In this spontaneous mutant, a genomic deletion removes the first two exons, but does not disrupt the reading frame; the protein levels are reduced (7).  These mice die by weaning or earlier (7;8).  They also exhibit impaired righting response, balance, locomotor ability, and coordination (7;8).  The mice have seizures by P14 and have decreased body size compared to their littermates (7;8).

References
  1. Berridge, M. J. (1993) Inositol Trisphosphate and Calcium Signalling. Nature. 361, 315-325.
Posted On 2012-10-05
Science Writer Anne Murray