rs1159106476

chr17-4899238-G-Achr17-4899238-G-Cchr17-4899238-G-T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_Moderate BP6_Moderate BP7

The NM_000080.4(CHRNE):c.1179C>T(p.Leu393=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000055 in 1,454,884 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 Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. L393L) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: CHRNE NM_000080.4 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -2.03

Genes affected

CHRNE (HGNC:1966): (cholinergic receptor nicotinic epsilon subunit) Acetylcholine receptors at mature mammalian neuromuscular junctions are pentameric protein complexes composed of four subunits in the ratio of two alpha subunits to one beta, one epsilon, and one delta subunit. The acetylcholine receptor changes subunit composition shortly after birth when the epsilon subunit replaces the gamma subunit seen in embryonic receptors. Mutations in the epsilon subunit are associated with congenital myasthenic syndrome. [provided by RefSeq, Sep 2009]

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.41).
• BP6: Variant 17-4899238-G-A is Benign according to our data. Variant chr17-4899238-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 2993370.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-2.03 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CHRNE	NM_000080.4	c.1179C>T	p.Leu393=	synonymous_variant	10/12	ENST00000649488.2
CHRNE	XM_017024115.2	c.1143C>T	p.Leu381=	synonymous_variant	11/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHRNE	ENST00000649488.2	c.1179C>T	p.Leu393=	synonymous_variant	10/12		NM_000080.4	P1
CHRNE	ENST00000649830.1	c.246C>T	p.Leu82=	synonymous_variant	10/11
CHRNE	ENST00000572438.1	n.865C>T		non_coding_transcript_exon_variant	5/7	5
CHRNE	ENST00000652550.1	n.909C>T		non_coding_transcript_exon_variant	2/4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000421 AC: 1 AN: 237568 Hom.: 0 AF XY: 0.00000767 AC XY: 1 AN XY: 130398

Gnomad AFR exome AF: 0.0000661

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000550 AC: 8 AN: 1454884 Hom.: 0 Cov.: 35 AF XY: 0.00000414 AC XY: 3 AN XY: 723938

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000450

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Congenital myasthenic syndrome 4A Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Aug 17, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.41
Cadd	Benign	1.4
Dann	Benign	0.97

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: rs1159106476; hg19: chr17-4802533;