Incidental Mutation 'C9142:Nf1'
ID162
Institutional Source Beutler Lab
Gene Symbol Nf1
Ensembl Gene ENSMUSG00000020716
Gene Nameneurofibromin 1
SynonymsNf-1, neurofibromin
Accession Numbers

Genbank: NM_010897; MGI: 97306

Is this an essential gene? Essential (E-score: 1.000) question?
Stock #C9142 (G3) of strain Muskatenwein
Quality Score
Status Validated
Chromosome11
Chromosomal Location79339693-79581612 bp(+) (GRCm38)
Type of Mutationmissense
DNA Base Change (assembly) C to T at 79556731 bp
ZygosityHeterozygous
Amino Acid Change Arginine to Cysteine at position 2433 (R2433C)
Ref Sequence ENSEMBL: ENSMUSP00000103886 (fasta)
Gene Model predicted gene model for transcript(s): [ENSMUST00000071325] [ENSMUST00000108251] [ENSMUST00000137997]
Predicted Effect possibly damaging
Transcript: ENSMUST00000071325
AA Change: R2454C

PolyPhen 2 Score 0.914 (Sensitivity: 0.81; Specificity: 0.94)
SMART Domains Protein: ENSMUSP00000071289
Gene: ENSMUSG00000020716
AA Change: R2454C

DomainStartEndE-ValueType
RasGAP 1189 1559 2.56e-151 SMART
SEC14 1585 1737 2.36e-11 SMART
low complexity region 2619 2629 N/A INTRINSIC
low complexity region 2750 2763 N/A INTRINSIC
Predicted Effect probably damaging
Transcript: ENSMUST00000108251
AA Change: R2433C

PolyPhen 2 Score 0.976 (Sensitivity: 0.76; Specificity: 0.96)
SMART Domains Protein: ENSMUSP00000103886
Gene: ENSMUSG00000020716
AA Change: R2433C

DomainStartEndE-ValueType
RasGAP 1189 1538 1.23e-153 SMART
SEC14 1564 1716 2.36e-11 SMART
low complexity region 2598 2608 N/A INTRINSIC
low complexity region 2729 2742 N/A INTRINSIC
Predicted Effect possibly damaging
Transcript: ENSMUST00000137997
AA Change: R438C

PolyPhen 2 Score 0.942 (Sensitivity: 0.80; Specificity: 0.94)
SMART Domains Protein: ENSMUSP00000120982
Gene: ENSMUSG00000020716
AA Change: R438C

DomainStartEndE-ValueType
low complexity region 604 614 N/A INTRINSIC
low complexity region 735 748 N/A INTRINSIC
Predicted Effect noncoding transcript
Transcript: ENSMUST00000146699
Meta Mutation Damage Score 0.436 question?
Coding Region Coverage
  • 1x: 84.8%
  • 3x: 59.3%
Validation Efficiency 82% (72/88)
MGI Phenotype FUNCTION: [Summary is not available for the mouse gene. This summary is for the human ortholog.] This gene product appears to function as a negative regulator of the ras signal transduction pathway. Mutations in this gene have been linked to neurofibromatosis type 1, juvenile myelomonocytic leukemia and Watson syndrome. The mRNA for this gene is subject to RNA editing (CGA>UGA->Arg1306Term) resulting in premature translation termination. Alternatively spliced transcript variants encoding different isoforms have also been described for this gene. [provided by RefSeq, Jul 2008]
PHENOTYPE: Homozygous embryos die by day 14.5 with enlarged head and chest, pale liver, microphthalmia, cardiac defects and delayed organ development. Heterozygotes have elevated astrocyte number, predisposition to multiple tumor types and learning/memory deficits. [provided by MGI curators]
Allele List at MGI

All alleles(23) : Targeted, knock-out(4) Targeted, other(3) Gene trapped(16)

Other mutations in this stock
Total: 7 list
GeneRefVarChr/LocMutationPredicted EffectZygosity
Adnp A G 2: 168,184,407 S323P probably damaging Het
Cc2d2a A G 5: 43,735,457 probably benign Homo
Chrm5 A G 2: 112,480,211 F187L probably damaging Het
Fmnl3 T C 15: 99,337,627 probably null Het
Klf7 C T 1: 64,079,157 A94T possibly damaging Het
Pdlim3 A T 8: 45,896,832 M60L probably benign Het
Vwde T C 6: 13,168,054 probably benign Homo
Other mutations in Nf1
AlleleSourceChrCoordTypePredicted EffectPPH Score
IGL00225:Nf1 APN 11 79395905 missense probably damaging 0.99
IGL00801:Nf1 APN 11 79428700 splice site probably benign
IGL00823:Nf1 APN 11 79565517 missense probably damaging 1.00
IGL00945:Nf1 APN 11 79469803 missense probably damaging 0.99
IGL00960:Nf1 APN 11 79445121 missense probably damaging 1.00
IGL01118:Nf1 APN 11 79546986 missense probably damaging 0.99
IGL01604:Nf1 APN 11 79441709 splice site probably benign
IGL01637:Nf1 APN 11 79547120 missense probably damaging 1.00
IGL01659:Nf1 APN 11 79559449 missense probably benign
IGL01764:Nf1 APN 11 79384187 missense probably benign
IGL01772:Nf1 APN 11 79390249 missense probably damaging 1.00
IGL02047:Nf1 APN 11 79425535 missense probably benign 0.04
IGL02052:Nf1 APN 11 79412727 missense probably damaging 1.00
IGL02071:Nf1 APN 11 79444121 missense possibly damaging 0.96
IGL02312:Nf1 APN 11 79444648 missense possibly damaging 0.95
IGL02341:Nf1 APN 11 79564926 missense probably benign 0.33
IGL02390:Nf1 APN 11 79565935 missense possibly damaging 0.64
IGL02390:Nf1 APN 11 79411676 splice site probably benign
IGL02475:Nf1 APN 11 79535667 missense probably damaging 1.00
IGL02567:Nf1 APN 11 79547143 missense probably damaging 1.00
IGL02571:Nf1 APN 11 79428627 missense probably damaging 1.00
IGL02664:Nf1 APN 11 79444598 critical splice acceptor site probably null
IGL02664:Nf1 APN 11 79444599 critical splice acceptor site probably null
IGL02992:Nf1 APN 11 79434933 splice site probably benign
IGL03006:Nf1 APN 11 79545431 missense probably damaging 1.00
IGL03216:Nf1 APN 11 79564895 missense probably benign 0.17
Franklin UTSW 11 79473320 splice site probably null
Jefferson UTSW 11 79446864 missense probably damaging 1.00
Phyletic_dwarf UTSW 11 79454189 missense probably damaging 1.00
I2289:Nf1 UTSW 11 79547776 missense probably damaging 1.00
R0055:Nf1 UTSW 11 79471551 missense probably damaging 1.00
R0055:Nf1 UTSW 11 79471551 missense probably damaging 1.00
R0081:Nf1 UTSW 11 79453979 splice site probably benign
R0115:Nf1 UTSW 11 79468876 critical splice donor site probably null
R0144:Nf1 UTSW 11 79547127 missense probably damaging 1.00
R0196:Nf1 UTSW 11 79468769 missense possibly damaging 0.94
R0196:Nf1 UTSW 11 79578272 missense probably damaging 1.00
R0217:Nf1 UTSW 11 79428574 splice site probably benign
R0238:Nf1 UTSW 11 79418574 missense possibly damaging 0.89
R0238:Nf1 UTSW 11 79418574 missense possibly damaging 0.89
R0239:Nf1 UTSW 11 79418574 missense possibly damaging 0.89
R0239:Nf1 UTSW 11 79418574 missense possibly damaging 0.89
R0255:Nf1 UTSW 11 79408699 splice site probably null
R0362:Nf1 UTSW 11 79536878 missense probably damaging 1.00
R0364:Nf1 UTSW 11 79441957 nonsense probably null
R0464:Nf1 UTSW 11 79556789 missense probably benign 0.17
R0511:Nf1 UTSW 11 79438769 missense probably benign 0.01
R0549:Nf1 UTSW 11 79468771 missense probably damaging 0.99
R0585:Nf1 UTSW 11 79568701 missense probably damaging 0.99
R0636:Nf1 UTSW 11 79535703 missense probably damaging 0.99
R0924:Nf1 UTSW 11 79453866 missense probably damaging 0.98
R0942:Nf1 UTSW 11 79438711 missense probably benign 0.00
R1022:Nf1 UTSW 11 79547033 missense probably damaging 1.00
R1024:Nf1 UTSW 11 79547033 missense probably damaging 1.00
R1350:Nf1 UTSW 11 79412687 missense probably damaging 1.00
R1365:Nf1 UTSW 11 79547885 splice site probably null
R1395:Nf1 UTSW 11 79535983 missense possibly damaging 0.49
R1467:Nf1 UTSW 11 79428626 missense possibly damaging 0.88
R1467:Nf1 UTSW 11 79428626 missense possibly damaging 0.88
R1477:Nf1 UTSW 11 79395859 nonsense probably null
R1508:Nf1 UTSW 11 79440909 missense probably damaging 1.00
R1512:Nf1 UTSW 11 79390369 missense probably damaging 1.00
R1605:Nf1 UTSW 11 79440923 missense probably benign 0.01
R1680:Nf1 UTSW 11 79550998 nonsense probably null
R1704:Nf1 UTSW 11 79463301 splice site probably null
R1707:Nf1 UTSW 11 79535604 missense probably damaging 1.00
R1741:Nf1 UTSW 11 79443931 missense probably benign
R1761:Nf1 UTSW 11 79384265 missense probably damaging 1.00
R1800:Nf1 UTSW 11 79553968 missense possibly damaging 0.94
R1873:Nf1 UTSW 11 79547161 missense probably damaging 1.00
R1966:Nf1 UTSW 11 79411564 missense possibly damaging 0.72
R1967:Nf1 UTSW 11 79412745 missense probably damaging 0.96
R1970:Nf1 UTSW 11 79553961 missense probably benign 0.08
R2059:Nf1 UTSW 11 79556723 missense probably damaging 0.96
R2105:Nf1 UTSW 11 79469826 missense possibly damaging 0.50
R2151:Nf1 UTSW 11 79447570 missense possibly damaging 0.94
R2211:Nf1 UTSW 11 79444064 missense probably benign 0.39
R2497:Nf1 UTSW 11 79443884 missense probably damaging 1.00
R2899:Nf1 UTSW 11 79412758 missense possibly damaging 0.93
R3086:Nf1 UTSW 11 79546986 missense probably damaging 1.00
R3120:Nf1 UTSW 11 79564899 missense probably damaging 0.99
R3744:Nf1 UTSW 11 79548747 missense probably benign 0.23
R3801:Nf1 UTSW 11 79559521 missense probably null 0.98
R3804:Nf1 UTSW 11 79559521 missense probably null 0.98
R4212:Nf1 UTSW 11 79469798 missense probably damaging 1.00
R4298:Nf1 UTSW 11 79384244 missense probably damaging 1.00
R4578:Nf1 UTSW 11 79445759 missense probably damaging 1.00
R4579:Nf1 UTSW 11 79468757 missense probably damaging 1.00
R4587:Nf1 UTSW 11 79536037 critical splice donor site probably null
R4793:Nf1 UTSW 11 79447572 missense probably damaging 1.00
R4834:Nf1 UTSW 11 79546297 missense probably damaging 1.00
R4863:Nf1 UTSW 11 79409409 missense probably damaging 1.00
R4967:Nf1 UTSW 11 79565553 critical splice donor site probably null
R4971:Nf1 UTSW 11 79444643 missense probably damaging 1.00
R5034:Nf1 UTSW 11 79444150 missense probably damaging 0.98
R5036:Nf1 UTSW 11 79446864 missense probably damaging 1.00
R5207:Nf1 UTSW 11 79454189 missense probably damaging 1.00
R5348:Nf1 UTSW 11 79564899 missense probably damaging 1.00
R5356:Nf1 UTSW 11 79473456 missense possibly damaging 0.94
R5444:Nf1 UTSW 11 79443959 missense possibly damaging 0.94
R5533:Nf1 UTSW 11 79445789 missense probably damaging 0.99
R5918:Nf1 UTSW 11 79569222 intron probably benign
R5978:Nf1 UTSW 11 79540419 missense probably damaging 1.00
R6140:Nf1 UTSW 11 79473320 splice site probably null
R6195:Nf1 UTSW 11 79565975 missense probably damaging 0.99
R6216:Nf1 UTSW 11 79411607 missense possibly damaging 0.93
R6233:Nf1 UTSW 11 79565975 missense probably damaging 0.99
R6257:Nf1 UTSW 11 79549491 missense probably damaging 1.00
R6258:Nf1 UTSW 11 79565755 intron probably null
R6756:Nf1 UTSW 11 79444587 splice site probably null
R6878:Nf1 UTSW 11 79434882 missense probably damaging 1.00
R6959:Nf1 UTSW 11 79549468 missense probably damaging 0.98
X0052:Nf1 UTSW 11 79559416 missense probably damaging 0.99
Nature of Mutation

DNA sequencing using the SOLiD technique identified a C to T transition at position 7468 of the Nf1 transcript in exon 50 of 58 total exons. Multiple transcripts of Nf1 gene are displayed on Ensembl and Vega. The mutated nucleotide causes an arginine to cysteine substitution at amino acid 2454 of the encoded protein (isoform 2). The mutation has been confirmed by DNA sequencing using the Sanger method (Figure 1).

Protein Function and Prediction
The Nf1 gene encodes a 2841 amino acid protein that is Ras GTPase-activating protein (GAP). Multiple isoforms are produced by alternative splicing. Isoform 1 is expressed predominantly in brain, spinal cord and testis. Isoform 2 is expressed predominantly in adrenal gland, kidney, ovary and lung. Isoform 3 is expressed predominantly in adrenal gland and isoform 4 is expressed mainly in the testis. Isoform 2 (the canonical isoform) contains a Ras-GAP domain at amino acids 1237-1453, and a CRAL-TRIO domain at residues 1583-1740. CRAL-TRIO domains typically bind small lipophilic molecules (Uniprot Q04690). Homozygous embryos die by day 14.5 with enlarged head and chest, pale liver, microphthalmia, cardiac defects and delayed organ development. Heterozygotes have elevated astrocyte number, predisposition to multiple tumor types and learning/memory deficits. Mutations in the human NF1 gene causes neurofibromatosis type I (NF1; 613113), which is an autosomal dominant disorder characterized by cafe-au-lait spots, Lisch nodules in the eye, and fibromatous tumors of the skin. Individuals with the disorder have increased susceptibility to the development of benign and malignant tumors.
 
The R2454C change is predicted to be probably damaging by the PolyPhen program.
Posted On2010-04-08