chr2-166311628-A-T

Position:

• chr2-166311628-A-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001365536.1(SCN9A):​c.129T>A​(p.Asp43Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,656 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. D43D) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 30)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SCN9A NM_001365536.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -3.88

Genes affected

SCN9A (HGNC:10597): (sodium voltage-gated channel alpha subunit 9) This gene encodes a voltage-gated sodium channel which plays a significant role in nociception signaling. Mutations in this gene have been associated with primary erythermalgia, channelopathy-associated insensitivity to pain, and paroxysmal extreme pain disorder. [provided by RefSeq, Aug 2009]

SCN1A-AS1 (HGNC:54069): (SCN1A and SCN9A antisense RNA 1)

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.039315104).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SCN9A	NM_001365536.1	c.129T>A	p.Asp43Glu	missense_variant	2/27	ENST00000642356.2	NP_001352465.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SCN9A	ENST00000642356.2	c.129T>A	p.Asp43Glu	missense_variant	2/27		NM_001365536.1	ENSP00000495601	P1
SCN1A-AS1	ENST00000651574.1	n.1977+15499A>T		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461656 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 727106

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 30

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.072
BayesDel_addAF	Benign	-0.059	T
BayesDel_noAF	Benign	-0.32
CADD	Benign	0.0050
DANN	Benign	0.32
DEOGEN2	Benign	0.20	.;T;.;.;T;.;.;.
Eigen	Benign	-1.8
Eigen_PC	Benign	-1.9
FATHMM_MKL	Benign	0.051	N
LIST_S2	Benign	0.64	T;.;T;T;T;T;T;T
M_CAP	Uncertain	0.12	D
MetaRNN	Benign	0.039	T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.34	T
MutationAssessor	Benign	-0.045	N;N;N;.;N;N;.;.
MutationTaster	Benign	1.0	N;N;N;N
PrimateAI	Benign	0.23	T
PROVEAN	Benign	-1.1	N;N;.;.;.;N;.;.
REVEL	Benign	0.28
Sift	Benign	0.55	T;T;.;.;.;T;.;.
Sift4G	Benign	1.0	T;T;.;.;.;T;.;.
Vest4		0.074
MutPred		0.31		Gain of methylation at K39 (P = 0.1245);Gain of methylation at K39 (P = 0.1245);Gain of methylation at K39 (P = 0.1245);Gain of methylation at K39 (P = 0.1245);Gain of methylation at K39 (P = 0.1245);Gain of methylation at K39 (P = 0.1245);Gain of methylation at K39 (P = 0.1245);Gain of methylation at K39 (P = 0.1245);
MVP		0.12
MPC		0.11
ClinPred		0.033	T
GERP RS		-11
Varity_R		0.046
gMVP		0.17

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: rs200826539; hg19: chr2-167168138;