rs745407845

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 3P and 6B. PM1PP2BP4_ModerateBS2

The NM_001042492.3(NF1):c.5225A>G(p.Asn1742Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000013 in 1,612,732 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N1742D) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000011 ( 0 hom. )

Consequence

NF1
NM_001042492.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:1

Conservation

PhyloP100: 7.08

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM1

In a region_of_interest Lipid binding (size 257) in uniprot entity NF1_HUMAN there are 97 pathogenic changes around while only 22 benign (82%) in NM_001042492.3

PP2

Missense variant where missense usually causes diseases, NF1

BP4

Computational evidence support a benign effect (MetaRNN=0.18561152).

BS2

High AC in GnomAd at 5 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NF1	NM_001042492.3 linkuse as main transcript	c.5225A>G	p.Asn1742Ser	missense_variant	37/58	ENST00000358273.9
NF1	NM_000267.3 linkuse as main transcript	c.5162A>G	p.Asn1721Ser	missense_variant	36/57

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NF1	ENST00000358273.9 linkuse as main transcript	c.5225A>G	p.Asn1742Ser	missense_variant	37/58	1	NM_001042492.3	P1	P21359-1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000281

AC:

AN:

249128

Hom.:

AF XY:

0.0000297

AC XY:

AN XY:

134756

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000884

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.0000110

AC:

AN:

1460440

Hom.:

Cov.:

AF XY:

0.0000124

AC XY:

AN XY:

726582

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000809

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000328

AC:

AN:

152292

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74472

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000306

Hom.:

Bravo

AF:

0.0000302

ExAC

AF:

0.0000412

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Neurofibromatosis, type 1

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Mar 15, 2022	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Invitae	Dec 21, 2023	This sequence change replaces asparagine, which is neutral and polar, with serine, which is neutral and polar, at codon 1721 of the NF1 protein (p.Asn1721Ser). This variant is present in population databases (rs745407845, gnomAD 0.01%). This missense change has been observed in individual(s) with neurofibromatosis type 1 and breast cancer (PMID: 26740943, 31882575). This variant is also known as c.5225A>G, p.Asn1742Ser. ClinVar contains an entry for this variant (Variation ID: 219686). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt NF1 protein function with a negative predictive value of 95%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Diffuse pediatric-type high-grade glioma, H3-wildtype and IDH-wildtype

Uncertain:1

Uncertain significance, criteria provided, single submitter

research

Laboratory of Medical Genetics Unit, Bambino Gesù Children's Hospital

Oct 09, 2018

- -

Neurofibromatosis, type 1;C0349639:Juvenile myelomonocytic leukemia;C0553586:Café-au-lait macules with pulmonary stenosis;C1834235:Neurofibromatosis, familial spinal;C2931482:Neurofibromatosis-Noonan syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Sep 28, 2021

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jun 21, 2019

In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 29684080, 26740943) -

Hereditary cancer-predisposing syndrome;CN230736:Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 02, 2021

This alteration is classified as likely benign based on a combination of the following: population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.076

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.66

Cadd

Benign

Dann

Uncertain

0.99

DEOGEN2

Pathogenic

0.84

D;.;T

Eigen

Benign

-0.12

Eigen_PC

Benign

0.044

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.91

D;D;D

M_CAP

Uncertain

0.10

MetaRNN

Benign

0.19

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.4

L;.;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.67

PROVEAN

Uncertain

-3.4

D;D;D

REVEL

Benign

0.15

Sift

Benign

0.14

T;T;T

Sift4G

Benign

0.13

T;T;T

Polyphen

0.0

B;B;.

Vest4

0.23

MutPred

0.57

Gain of disorder (P = 0.0516);.;.;

MVP

0.39

MPC

0.55

ClinPred

0.096

GERP RS

3.0

Varity_R

0.45

gMVP

0.44

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