Genetic Variant NF1:c.3198-12_3198-4dupTTTTTTTTT (chr17-31232043-A-ATTTTTTTTT) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The NM_001042492.3(NF1):c.3198-12_3198-4dupTTTTTTTTT variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000011 ( 0 hom., cov: 0)

Exomes 𝑓: 0.000016 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

NF1
NM_001042492.3 splice_region, intron

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.50

Publications

2 publications found

Variant links:

Genes affected

NF1 (HGNC:7765): (neurofibromin 1) 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]

NF1 Gene-Disease associations (from GenCC):

neurofibromatosis type 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, PanelApp Australia, G2P, Genomics England PanelApp
neurofibromatosis-Noonan syndrome
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Genomics England PanelApp, PanelApp Australia
Moyamoya disease
Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
hereditary pheochromocytoma-paraganglioma
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
familial ovarian cancer
Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

NF1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NF1	NM_001042492.3 link	c.3198-12_3198-4dupTTTTTTTTT		splice_region_variant, intron_variant	Intron 24 of 57	ENST00000358273.9	NP_001035957.1
NF1	NM_000267.4 link	c.3198-12_3198-4dupTTTTTTTTT		splice_region_variant, intron_variant	Intron 24 of 56		NP_000258.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NF1	ENST00000358273.9 link	c.3198-30_3198-29insTTTTTTTTT		intron_variant	Intron 24 of 57	1	NM_001042492.3	ENSP00000351015.4

Frequencies

GnomAD3 genomes

AF:

0.0000110

AC:

AN:

90908

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000209

Gnomad OTH

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.0000160

AC:

AN:

499010

Hom.:

Cov.:

AF XY:

0.0000152

AC XY:

AN XY:

262428

show subpopulations

African (AFR)

AF:

0.0000984

AC:

AN:

10162

American (AMR)

AF:

0.00

AC:

AN:

16036

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

12226

East Asian (EAS)

AF:

0.00

AC:

AN:

16806

South Asian (SAS)

AF:

0.0000233

AC:

AN:

42948

European-Finnish (FIN)

AF:

0.00

AC:

AN:

28846

Middle Eastern (MID)

AF:

0.00

AC:

AN:

1682

European-Non Finnish (NFE)

AF:

0.0000172

AC:

AN:

348458

Other (OTH)

AF:

0.00

AC:

AN:

21846

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.419

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000110

AC:

AN:

90908

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

42040

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

22426

American (AMR)

AF:

0.00

AC:

AN:

7422

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

2612

East Asian (EAS)

AF:

0.00

AC:

AN:

2728

South Asian (SAS)

AF:

0.00

AC:

AN:

2360

European-Finnish (FIN)

AF:

0.00

AC:

AN:

3380

Middle Eastern (MID)

AF:

0.00

AC:

AN:

196

European-Non Finnish (NFE)

AF:

0.0000209

AC:

AN:

47886

Other (OTH)

AF:

0.00

AC:

AN:

1220

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.325

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

PhyloP100

1.5

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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17-31232043-ATTTTTTTTTTTTTTT-ATTTTTTTTTTTTTTTTTTTTTTTT

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over