chr2-166227721-T-C

Variant names:

• chr2-166227721-T-C
• rs1553478842
• NM_001365536.1:c.4209A>G

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_001365536.1(SCN9A):​c.4209A>G​(p.Ala1403Ala) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: SCN9A NM_001365536.1 splice_region, synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.703
• Publications: 0 publications found

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

Our verdict: Likely_benign. The variant received -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.52).
• BP6: Variant 2-166227721-T-C is Benign according to our data. Variant chr2-166227721-T-C is described in ClinVar as Likely_benign. ClinVar VariationId is 471126.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-0.703 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SCN9A	NM_001365536.1	c.4209A>G	p.Ala1403Ala	splice_region_variant, synonymous_variant	Exon 23 of 27	ENST00000642356.2	NP_001352465.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SCN9A	ENST00000642356.2	c.4209A>G	p.Ala1403Ala	splice_region_variant, synonymous_variant	Exon 23 of 27		NM_001365536.1	ENSP00000495601.1
SCN9A	ENST00000303354.11	c.4209A>G	p.Ala1403Ala	splice_region_variant, synonymous_variant	Exon 23 of 27	5		ENSP00000304748.7
SCN9A	ENST00000409672.5	c.4176A>G	p.Ala1392Ala	splice_region_variant, synonymous_variant	Exon 23 of 27	5		ENSP00000386306.1
SCN9A	ENST00000645907.1	c.4176A>G	p.Ala1392Ala	splice_region_variant, synonymous_variant	Exon 23 of 27			ENSP00000495983.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 1326600 Hom.: 0 Cov.: 22 AF XY: 0.00 AC XY: 0 AN XY: 659002

African (AFR) AF: 0.00 AC: 0 AN: 30346

American (AMR) AF: 0.00 AC: 0 AN: 36106

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24768

East Asian (EAS) AF: 0.00 AC: 0 AN: 36032

South Asian (SAS) AF: 0.00 AC: 0 AN: 77890

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49432

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5584

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1010828

Other (OTH) AF: 0.00 AC: 0 AN: 55614

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Generalized epilepsy with febrile seizures plus, type 7;C2752089:Neuropathy, hereditary sensory and autonomic, type 2A Benign:1

May 30, 2017

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.52
CADD	Benign	2.2
DANN	Benign	0.64
PhyloP100		-0.70
Mutation Taster		=90/10	polymorphism

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

Other links and lift over

dbSNP: rs1553478842; hg19: chr2-167084231;