chr17-31358461-G-T

Position:

chr17-31358461-G-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_001042492.3(NF1):c.7971-19G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00327 in 1,610,870 control chromosomes in the GnomAD database, including 169 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). There are indicators that this mutation may affect the branch point..

Frequency

Genomes: 𝑓 0.018 ( 95 hom., cov: 32)

Exomes 𝑓: 0.0017 ( 74 hom. )

Consequence

NF1
NM_001042492.3 intron

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:9

Conservation

PhyloP100: 0.960

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 links:

NF1 (HGNC:):

NF1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

This place is a probable branch point but likely benign (scored 3 / 10). Computational evidence support a benign effect (BayesDel_noAF=-0.57).

BP6

Variant 17-31358461-G-T is Benign according to our data. Variant chr17-31358461-G-T is described in ClinVar as [Benign]. Clinvar id is 257305.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr17-31358461-G-T is described in Lovd as [Benign].

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.06 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NF1	NM_001042492.3 linkuse as main transcript	c.7971-19G>T		intron_variant		ENST00000358273.9	NP_001035957.1	P21359-1
NF1	NM_000267.3 linkuse as main transcript	c.7908-19G>T		intron_variant			NP_000258.1	P21359-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NF1	ENST00000358273.9 linkuse as main transcript	c.7971-19G>T		intron_variant		1	NM_001042492.3	ENSP00000351015.4		P21359-1

Frequencies

GnomAD3 genomes

AF:

0.0179

AC:

2720

AN:

151884

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0620

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00714

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000623

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.000280

Gnomad OTH

AF:

0.0115

GnomAD3 exomes

AF:

0.00469

AC:

1170

AN:

249398

Hom.:

AF XY:

0.00353

AC XY:

477

AN XY:

134942

show subpopulations

Gnomad AFR exome

AF:

0.0634

Gnomad AMR exome

AF:

0.00334

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000328

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000204

Gnomad OTH exome

AF:

0.00214

GnomAD4 exome

AF:

0.00175

AC:

2550

AN:

1458868

Hom.:

Cov.:

AF XY:

0.00154

AC XY:

1115

AN XY:

725896

show subpopulations

Gnomad4 AFR exome

AF:

0.0613

Gnomad4 AMR exome

AF:

0.00372

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000505

Gnomad4 SAS exome

AF:

0.0000581

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000847

Gnomad4 OTH exome

AF:

0.00365

GnomAD4 genome

AF:

0.0179

AC:

2725

AN:

152002

Hom.:

Cov.:

AF XY:

0.0171

AC XY:

1270

AN XY:

74296

show subpopulations

Gnomad4 AFR

AF:

0.0620

Gnomad4 AMR

AF:

0.00713

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000416

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000280

Gnomad4 OTH

AF:

0.0114

Alfa

AF:

0.00111

Hom.:

Bravo

AF:

0.0196

Asia WGS

AF:

0.00462

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:9

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:3

Benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, Amsterdam University Medical Center	-	- -

not provided

Benign:3

Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	May 12, 2016	Variant summary: The NF1 c.7908-19G>T variant involves the alteration of a non-conserved intronic nucleotide with 5/5 splice prediction tools calculating no significant effect on splicing, although these predictions have yet to be functionally assessed. The variant of interest was observed in the large, broad control population, ExAC, with an allele frequency of 699/109636 (21 homozygotes, 1/156, frequency: 0.0063756), predominantly observed in the African cohort, 660/9614 (21 homozygotes, 1/14, frequency: 0.06865), which significantly exceeds the estimated maximal expected allele frequency for a pathogenic NF1 variant of 1/4798 (0.0002084). Therefore, suggesting the variant is a common polymorphism found in population(s) of African origin. The variant of interest, to our knowledge, has not been reported in affected individuals via publications and/or reputable databases/clinical laboratories. Therefore, taking all available lines of evidence into consideration, the variant of interest is classified as Benign. -
Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Sep 27, 2023	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Apr 05, 2016	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Neurofibromatosis, type 1

Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 01, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Mar 15, 2022	- -

Neurofibromatosis, familial spinal

Benign:1

Benign, criteria provided, single submitter

clinical testing

KCCC/NGS Laboratory, Kuwait Cancer Control Center

Jul 07, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.57

CADD

Benign

DANN

Benign

0.52

BranchPoint Hunter

3.0

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over