Mutagenetix > Incidental Mutation

Incidental Mutation 'P0005:Itpr1'

7613

Institutional Source

Beutler Lab

Gene Symbol

Itpr1

Ensembl Gene

ENSMUSG00000030102

Gene Name

inositol 1,4,5-trisphosphate receptor 1

Synonyms

P400, Itpr-1, IP3R1, Pcp1, Pcp-1, Ip3r, InsP3R type I, opt

MMRRC Submission

038262-MU

Accession Numbers

NCBI RefSeq: NM_010585.5; MGI: 96623

Essential gene?

Possibly essential (E-score: 0.746) question?

Stock #

P0005 (G1)

Quality Score

Status

Validated

Chromosome

Chromosomal Location

108213096-108551109 bp(+) (GRCm38)

Type of Mutation

missense

DNA Base Change (assembly)

A to T at 108381257 bp (GRCm38)

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

Domain	Start	End	E-Value	Type
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

Domain	Start	End	E-Value	Type
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

Domain	Start	End	E-Value	Type
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

Coding Region Coverage

1x: 85.5%
3x: 80.5%
10x: 66.1%
20x: 49.6%

Validation Efficiency

95% (104/109)

MGI Phenotype

Strain: 2180360; 3715928; 1856981
Lethality: D10-D21
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
Gene	Ref	Var	Chr/Loc	Mutation	Predicted Effect	Zygosity
4933406M09Rik	T	A	1: 134,387,908	M15K	probably benign	Het
Atp13a1	T	C	8: 69,803,747	V845A	possibly damaging	Het
C87499	A	G	4: 88,627,950	L385P	probably damaging	Het
Casp6	T	C	3: 129,912,143	V153A	probably benign	Het
Col6a1	A	G	10: 76,717,329		probably benign	Het
Dars2	A	G	1: 161,053,939		probably null	Het
Hmgcll1	T	A	9: 76,074,759	M162K	possibly damaging	Het
Hydin	A	T	8: 110,494,289		probably null	Het
Ift74	A	G	4: 94,662,576		probably benign	Het
Mmp17	T	C	5: 129,596,631	V258A	probably benign	Het
Nek6	T	C	2: 38,569,737		probably null	Het
Nomo1	A	T	7: 46,037,557		probably null	Het
Nudt3	A	G	17: 27,596,715		probably benign	Het
Prkg2	A	C	5: 98,969,947	F512V	probably damaging	Het
Ptp4a3	T	A	15: 73,755,311	D72E	possibly damaging	Het
Rpgrip1l	A	T	8: 91,299,225		probably benign	Het
Rrp9	G	A	9: 106,481,177	R101H	probably benign	Het
Slc7a6os	T	C	8: 106,204,522	I161V	probably benign	Het
Tex15	T	C	8: 33,570,868	F109L	probably benign	Het
Tns2	A	G	15: 102,114,056	Q1188R	probably damaging	Het

Other mutations in Itpr1

Allele	Source	Chr	Coord	Type	Predicted Effect	PPH Score
IGL00979:Itpr1	APN	6	108471120	missense	probably damaging	0.98
IGL01073:Itpr1	APN	6	108413820	missense	probably benign	0.00
IGL01105:Itpr1	APN	6	108381333	missense	probably benign	0.00
IGL01296:Itpr1	APN	6	108399361	missense	probably damaging	1.00
IGL01325:Itpr1	APN	6	108381208	missense	probably benign	0.01
IGL01418:Itpr1	APN	6	108339624	critical splice donor site	probably null
IGL01464:Itpr1	APN	6	108386727	missense	possibly damaging	0.95
IGL01467:Itpr1	APN	6	108488496	missense	probably damaging	0.96
IGL01645:Itpr1	APN	6	108473599	missense	possibly damaging	0.91
IGL01672:Itpr1	APN	6	108381032	nonsense	probably null
IGL01969:Itpr1	APN	6	108377691	missense	probably damaging	1.00
IGL02164:Itpr1	APN	6	108389483	missense	probably benign	0.08
IGL02206:Itpr1	APN	6	108549820	missense	probably damaging	1.00
IGL02232:Itpr1	APN	6	108417923	missense	probably damaging	1.00
IGL02297:Itpr1	APN	6	108339517	missense	possibly damaging	0.84
IGL02434:Itpr1	APN	6	108489922	splice site	probably null
IGL02568:Itpr1	APN	6	108339554	missense	possibly damaging	0.82
IGL02992:Itpr1	APN	6	108381315	missense	probably damaging	1.00
IGL03109:Itpr1	APN	6	108417981	missense	probably damaging	1.00
IGL03130:Itpr1	APN	6	108523401	missense	probably benign	0.00
IGL03333:Itpr1	APN	6	108380910	unclassified	probably benign
aboriginal	UTSW	6	108515947	missense	probably benign
approximation	UTSW	6	108394841	missense	probably benign
estimate	UTSW	6	108389553	missense	probably null	1.00
icarus	UTSW	6	108410900	missense	probably damaging	1.00
marsupialized	UTSW	6	108394073	splice site	probably null
primordial	UTSW	6	108518755	missense	probably benign	0.06
roo	UTSW	6	108410867	missense	probably benign	0.00
wallaby	UTSW	6	108389387	missense	probably damaging	1.00
PIT4366001:Itpr1	UTSW	6	108493757	nonsense	probably null
R0019:Itpr1	UTSW	6	108354626	missense	probably damaging	1.00
R0128:Itpr1	UTSW	6	108471209	splice site	probably benign
R0129:Itpr1	UTSW	6	108349676	missense	probably damaging	1.00
R0135:Itpr1	UTSW	6	108488482	splice site	probably benign
R0244:Itpr1	UTSW	6	108473589	missense	probably benign	0.00
R0391:Itpr1	UTSW	6	108378167	missense	probably benign	0.22
R0543:Itpr1	UTSW	6	108515748	splice site	probably benign
R0647:Itpr1	UTSW	6	108383698	missense	probably damaging	1.00
R0766:Itpr1	UTSW	6	108410900	missense	probably damaging	1.00
R0971:Itpr1	UTSW	6	108349629	missense	possibly damaging	0.70
R1083:Itpr1	UTSW	6	108510696	missense	possibly damaging	0.92
R1277:Itpr1	UTSW	6	108339621	missense	probably benign	0.22
R1403:Itpr1	UTSW	6	108389553	missense	probably null	1.00
R1403:Itpr1	UTSW	6	108389553	missense	probably null	1.00
R1404:Itpr1	UTSW	6	108386648	missense	probably benign	0.04
R1404:Itpr1	UTSW	6	108386648	missense	probably benign	0.04
R1605:Itpr1	UTSW	6	108349659	missense	possibly damaging	0.77
R1661:Itpr1	UTSW	6	108482897	missense	probably benign	0.38
R1852:Itpr1	UTSW	6	108386706	missense	probably damaging	1.00
R1929:Itpr1	UTSW	6	108493755	missense	probably damaging	1.00
R2012:Itpr1	UTSW	6	108440536	missense	probably benign	0.02
R2027:Itpr1	UTSW	6	108386853	missense	possibly damaging	0.80
R2111:Itpr1	UTSW	6	108378309	unclassified	probably benign
R2166:Itpr1	UTSW	6	108388225	missense	probably damaging	1.00
R2272:Itpr1	UTSW	6	108493755	missense	probably damaging	1.00
R2484:Itpr1	UTSW	6	108369110	missense	probably damaging	1.00
R3115:Itpr1	UTSW	6	108406109	missense	possibly damaging	0.55
R3751:Itpr1	UTSW	6	108349680	missense	probably damaging	1.00
R3798:Itpr1	UTSW	6	108381270	missense	probably damaging	1.00
R3930:Itpr1	UTSW	6	108394841	missense	probably benign
R4081:Itpr1	UTSW	6	108391835	missense	probably damaging	1.00
R4119:Itpr1	UTSW	6	108394355	missense	probably benign
R4406:Itpr1	UTSW	6	108354663	missense	probably damaging	1.00
R4506:Itpr1	UTSW	6	108432686	missense	probably damaging	1.00
R4616:Itpr1	UTSW	6	108481223	missense	probably damaging	1.00
R4655:Itpr1	UTSW	6	108481293	missense	probably damaging	1.00
R4661:Itpr1	UTSW	6	108410931	critical splice donor site	probably null
R4760:Itpr1	UTSW	6	108349632	missense	probably benign	0.29
R4836:Itpr1	UTSW	6	108389537	missense	probably damaging	0.99
R4857:Itpr1	UTSW	6	108410867	missense	probably benign	0.00
R4876:Itpr1	UTSW	6	108482906	missense	probably damaging	0.97
R4939:Itpr1	UTSW	6	108440558	nonsense	probably null
R5076:Itpr1	UTSW	6	108405529	splice site	probably null
R5088:Itpr1	UTSW	6	108389387	missense	probably damaging	1.00
R5248:Itpr1	UTSW	6	108542062	missense	probably damaging	1.00
R5290:Itpr1	UTSW	6	108406145	missense	possibly damaging	0.95
R5308:Itpr1	UTSW	6	108356511	missense	probably damaging	1.00
R5339:Itpr1	UTSW	6	108393961	missense	probably damaging	1.00
R5368:Itpr1	UTSW	6	108387498	missense	probably damaging	1.00
R5369:Itpr1	UTSW	6	108519424	missense	probably damaging	0.99
R5419:Itpr1	UTSW	6	108493794	missense	possibly damaging	0.95
R5615:Itpr1	UTSW	6	108488600	missense	possibly damaging	0.71
R5779:Itpr1	UTSW	6	108352143	missense	probably damaging	1.00
R5781:Itpr1	UTSW	6	108510738	missense	probably benign	0.23
R5869:Itpr1	UTSW	6	108473529	missense	probably benign	0.30
R5903:Itpr1	UTSW	6	108489797	intron	probably benign
R5929:Itpr1	UTSW	6	108423336	missense	probably benign
R5956:Itpr1	UTSW	6	108506027	missense	probably benign	0.25
R6160:Itpr1	UTSW	6	108518755	missense	probably benign	0.06
R6163:Itpr1	UTSW	6	108388284	missense	probably damaging	1.00
R6169:Itpr1	UTSW	6	108369116	missense	probably damaging	1.00
R6237:Itpr1	UTSW	6	108378203	missense	possibly damaging	0.53
R6398:Itpr1	UTSW	6	108505903	missense	probably damaging	0.96
R6455:Itpr1	UTSW	6	108417972	missense	probably damaging	1.00
R6522:Itpr1	UTSW	6	108388276	missense	probably damaging	1.00
R6524:Itpr1	UTSW	6	108363683	missense	probably damaging	1.00
R6650:Itpr1	UTSW	6	108394073	splice site	probably null
R6806:Itpr1	UTSW	6	108515947	missense	probably benign
R6838:Itpr1	UTSW	6	108471191	missense	possibly damaging	0.87
R6841:Itpr1	UTSW	6	108388192	missense	probably damaging	1.00
R6896:Itpr1	UTSW	6	108481394	missense	probably damaging	1.00
R7014:Itpr1	UTSW	6	108431498	critical splice donor site	probably null
R7076:Itpr1	UTSW	6	108388296	missense	probably benign
R7116:Itpr1	UTSW	6	108481268	missense	probably damaging	0.99
R7152:Itpr1	UTSW	6	108394407	critical splice donor site	probably null
R7161:Itpr1	UTSW	6	108386640	missense	probably damaging	1.00
R7166:Itpr1	UTSW	6	108378190	missense	probably benign	0.06
R7241:Itpr1	UTSW	6	108517620	critical splice donor site	probably null
R7301:Itpr1	UTSW	6	108542024	missense	possibly damaging	0.86
R7330:Itpr1	UTSW	6	108438331	missense	probably benign	0.28
R7449:Itpr1	UTSW	6	108389384	missense	probably damaging	0.98
R7472:Itpr1	UTSW	6	108403396	missense	probably benign	0.05
R7502:Itpr1	UTSW	6	108383678	missense	probably benign	0.00
R7779:Itpr1	UTSW	6	108523348	missense	possibly damaging	0.75
R7828:Itpr1	UTSW	6	108482931	missense	probably damaging	1.00
R7854:Itpr1	UTSW	6	108387369	missense	probably damaging	1.00
R7974:Itpr1	UTSW	6	108523405	missense	possibly damaging	0.86
R7998:Itpr1	UTSW	6	108417948	missense	possibly damaging	0.88
R8039:Itpr1	UTSW	6	108386628	missense	probably damaging	1.00
R8136:Itpr1	UTSW	6	108438360	missense	probably benign	0.18
R8200:Itpr1	UTSW	6	108394865	missense	probably benign	0.00
R8242:Itpr1	UTSW	6	108386697	missense	probably benign	0.44
R8322:Itpr1	UTSW	6	108388229	missense	probably benign	0.05
R8377:Itpr1	UTSW	6	108510738	missense	probably benign	0.00
R8412:Itpr1	UTSW	6	108363620	missense	probably benign	0.07
R8443:Itpr1	UTSW	6	108519348	missense	probably damaging	0.99
R8669:Itpr1	UTSW	6	108393967	missense	probably damaging	0.99
R8697:Itpr1	UTSW	6	108523366	missense	probably damaging	1.00
R8744:Itpr1	UTSW	6	108377802	missense	possibly damaging	0.79
R8870:Itpr1	UTSW	6	108388211	missense	probably damaging	1.00
R8921:Itpr1	UTSW	6	108378198	missense	possibly damaging	0.87
R8961:Itpr1	UTSW	6	108493705	missense	possibly damaging	0.86
R9095:Itpr1	UTSW	6	108387391	missense	probably benign	0.02
R9205:Itpr1	UTSW	6	108489849	missense	probably damaging	0.99
R9282:Itpr1	UTSW	6	108394023	missense	probably damaging	1.00
R9323:Itpr1	UTSW	6	108352018	missense	probably damaging	1.00
R9376:Itpr1	UTSW	6	108349677	missense	probably damaging	0.99
R9392:Itpr1	UTSW	6	108413876	missense	probably benign
R9428:Itpr1	UTSW	6	108401347	missense	possibly damaging	0.84
R9621:Itpr1	UTSW	6	108416909	missense	probably damaging	1.00
R9632:Itpr1	UTSW	6	108405520	missense	possibly damaging	0.50
R9646:Itpr1	UTSW	6	108394884	missense	probably damaging	1.00
R9695:Itpr1	UTSW	6	108401350	missense	probably damaging	1.00
R9710:Itpr1	UTSW	6	108405520	missense	possibly damaging	0.50
R9721:Itpr1	UTSW	6	108406102	missense	probably damaging	0.96
R9780:Itpr1	UTSW	6	108510834	missense	probably benign	0.03
Z1176:Itpr1	UTSW	6	108499149	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).

Itpr1^{tm1Tno/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).

Itpr1^m1Asb^/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).

Itpr1^opt/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.

2. Hirota, J., Ando, H., Hamada, K., and Mikoshiba, K. (2003) Carbonic Anhydrase-Related Protein is a Novel Binding Protein for Inositol 1,4,5-Trisphosphate Receptor Type 1. Biochem J. 372, 435-441.

3. Uchida, K., Aramaki, M., Nakazawa, M., Yamagishi, C., Makino, S., Fukuda, K., Nakamura, T., Takahashi, T., Mikoshiba, K., and Yamagishi, H. (2010) Gene Knock-Outs of Inositol 1,4,5-Trisphosphate Receptors Types 1 and 2 Result in Perturbation of Cardiogenesis. PLoS One. 5, e12500.

4. Galeotti, N., Vivoli, E., Norcini, M., Bartolini, A., and Ghelardini, C. (2008) An Antidepressant Behaviour in Mice Carrying a Gene-Specific InsP3R1, InsP3R2 and InsP3R3 Protein Knockdown. Neuropharmacology. 55, 1156-1164.

5. Matsumoto, M., Nakagawa, T., Inoue, T., Nagata, E., Tanaka, K., Takano, H., Minowa, O., Kuno, J., Sakakibara, S., Yamada, M., Yoneshima, H., Miyawaki, A., Fukuuchi, Y., Furuichi, T., Okano, H., Mikoshiba, K., and Noda, T. (1996) Ataxia and Epileptic Seizures in Mice Lacking Type 1 Inositol 1,4,5-Trisphosphate Receptor. Nature. 379, 168-171.

6. van de Leemput, J., Chandran, J., Knight, M. A., Holtzclaw, L. A., Scholz, S., Cookson, M. R., Houlden, H., Gwinn-Hardy, K., Fung, H. C., Lin, X., Hernandez, D., Simon-Sanchez, J., Wood, N. W., Giunti, P., Rafferty, I., Hardy, J., Storey, E., Gardner, R. J., Forrest, S. M., Fisher, E. M., Russell, J. T., Cai, H., and Singleton, A. B. (2007) Deletion at ITPR1 Underlies Ataxia in Mice and Spinocerebellar Ataxia 15 in Humans. PLoS Genet. 3, e108.

7. Street, V. A., Bosma, M. M., Demas, V. P., Regan, M. R., Lin, D. D., Robinson, L. C., Agnew, W. S., and Tempel, B. L. (1997) The Type 1 Inositol 1,4,5-Trisphosphate Receptor Gene is Altered in the Opisthotonos Mouse. J Neurosci. 17, 635-645.

8. Street, V. A., Robinson, L. C., Erford, S. K., and Tempel, B. L. (1995) Molecular Genetic Analysis of Distal Mouse Chromosome 6 Defines Gene Order and Positions of the Deafwaddler and Opisthotonos Mutations. Genomics. 29, 123-130.

Posted On

2012-10-05

Science Writer

Anne Murray