1-114713986-T-A

Variant names:

• chr1-114713986-T-A
• rs9724626
• NM_002524.5:c.112-8A>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_002524.5(NRAS):​c.112-8A>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000837 in 1,194,790 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 8.4e-7 (0 hom.)
• Consequence: NRAS NM_002524.5 splice_region, intron
• Scores: Splicing: ADA: 0.0001011
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.46
• Publications: 0 publications found

Genes affected

NRAS (HGNC:7989): (NRAS proto-oncogene, GTPase) This is an N-ras oncogene encoding a membrane protein that shuttles between the Golgi apparatus and the plasma membrane. This shuttling is regulated through palmitoylation and depalmitoylation by the ZDHHC9-GOLGA7 complex. The encoded protein, which has intrinsic GTPase activity, is activated by a guanine nucleotide-exchange factor and inactivated by a GTPase activating protein. Mutations in this gene have been associated with somatic rectal cancer, follicular thyroid cancer, autoimmune lymphoproliferative syndrome, Noonan syndrome, and juvenile myelomonocytic leukemia. [provided by RefSeq, Jun 2011]

NRAS Gene-Disease associations (from GenCC):

• Noonan syndrome

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen
• Noonan syndrome 6

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
• cardiofaciocutaneous syndrome

  Inheritance: AD Classification: STRONG, LIMITED Submitted by: ClinGen, Genomics England PanelApp
• Costello syndrome

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• Noonan syndrome with multiple lentigines

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• Noonan syndrome-like disorder with loose anagen hair

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002524.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NRAS	NM_002524.5	MANE Select	c.112-8A>T		splice_region intron	N/A	NP_002515.1	Q5U091

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NRAS	ENST00000369535.5	TSL:1 MANE Select	c.112-8A>T		splice_region intron	N/A	ENSP00000358548.4	P01111
	NRAS	ENST00000899430.1		c.112-8A>T		splice_region intron	N/A	ENSP00000569489.1
	NRAS	ENST00000931010.1		c.112-8A>T		splice_region intron	N/A	ENSP00000601069.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 8.37e-7 AC: 1 AN: 1194790 Hom.: 0 Cov.: 24 AF XY: 0.00 AC XY: 0 AN XY: 596364

African (AFR) AF: 0.00 AC: 0 AN: 27174

American (AMR) AF: 0.00 AC: 0 AN: 39434

Ashkenazi Jewish (ASJ) AF: 0.0000501 AC: 1 AN: 19948

East Asian (EAS) AF: 0.00 AC: 0 AN: 27280

South Asian (SAS) AF: 0.00 AC: 0 AN: 80260

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 38790

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4780

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 910608

Other (OTH) AF: 0.00 AC: 0 AN: 46516

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	5.8
DANN	Benign	0.70
PhyloP100		1.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.00010
dbscSNV1_RF	Benign	0.0
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

Other links and lift over

dbSNP: rs9724626; hg19: chr1-115256607;