rs1048317

Positions:

• chr17-31376984-T-C

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_001042492.3(NF1):​c.*2829T>C variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.642 in 233,060 control chromosomes in the GnomAD database, including 48,859 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.65 (32993 hom., cov: 31)
  • Exomes 𝑓: 0.62 (15866 hom.)
• Consequence: NF1 NM_001042492.3 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: -1.99

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]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant 17-31376984-T-C is Benign according to our data. Variant chr17-31376984-T-C is described in ClinVar as [Benign]. Clinvar id is 322603.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr17-31376984-T-C is described in Lovd as [Benign].
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.759 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
NF1	NM_001042492.3	c.*2829T>C		3_prime_UTR_variant	58/58	ENST00000358273.9	NP_001035957.1
NF1	NM_000267.3	c.*2829T>C		3_prime_UTR_variant	57/57		NP_000258.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
NF1	ENST00000358273.9	c.*2829T>C		3_prime_UTR_variant	58/58	1	NM_001042492.3	ENSP00000351015.4

Frequencies

GnomAD3 genomes AF: 0.652 AC: 99061 AN: 151894 Hom.: 32969 Cov.: 31

Gnomad AFR AF: 0.766

Gnomad AMI AF: 0.698

Gnomad AMR AF: 0.513

Gnomad ASJ AF: 0.705

Gnomad EAS AF: 0.441

Gnomad SAS AF: 0.621

Gnomad FIN AF: 0.618

Gnomad MID AF: 0.668

Gnomad NFE AF: 0.634

Gnomad OTH AF: 0.651

GnomAD4 exome AF: 0.622 AC: 50391 AN: 81048 Hom.: 15866 Cov.: 0 AF XY: 0.622 AC XY: 23168 AN XY: 37276

Gnomad4 AFR exome AF: 0.765

Gnomad4 AMR exome AF: 0.492

Gnomad4 ASJ exome AF: 0.709

Gnomad4 EAS exome AF: 0.496

Gnomad4 SAS exome AF: 0.614

Gnomad4 FIN exome AF: 0.617

Gnomad4 NFE exome AF: 0.636

Gnomad4 OTH exome AF: 0.626

GnomAD4 genome AF: 0.652 AC: 99121 AN: 152012 Hom.: 32993 Cov.: 31 AF XY: 0.647 AC XY: 48045 AN XY: 74314

Gnomad4 AFR AF: 0.766

Gnomad4 AMR AF: 0.512

Gnomad4 ASJ AF: 0.705

Gnomad4 EAS AF: 0.440

Gnomad4 SAS AF: 0.619

Gnomad4 FIN AF: 0.618

Gnomad4 NFE AF: 0.634

Gnomad4 OTH AF: 0.647

Alfa AF: 0.634 Hom.: 40543

Bravo AF: 0.649

Asia WGS AF: 0.530 AC: 1842 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Neurofibromatosis, type 1 Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Neurofibromatosis, familial spinal Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Neurofibromatosis-Noonan syndrome Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

not provided Benign:1

Benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

-

- -

Café-au-lait macules with pulmonary stenosis Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	0.15
DANN	Benign	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

Other links and lift over

dbSNP: rs1048317; hg19: chr17-29704002; COSMIC: COSV62222204; COSMIC: COSV62222204;