17-4902757-C-G

Variant names:

• chr17-4902757-C-G
• rs4790235
• NM_000080.4:c.53G>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The NM_000080.4(CHRNE):​c.53G>C​(p.Gly18Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000452 in 1,613,920 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/24 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G18V) has been classified as Benign.

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000048 (0 hom.)
• Consequence: CHRNE NM_000080.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:3
• Conservation: PhyloP100: -0.570
• Publications: 17 publications found

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]

C17orf107 (HGNC:37238): (chromosome 17 open reading frame 107)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000080.4. 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
	CHRNE	NM_000080.4	MANE Select	c.53G>C	p.Gly18Ala	missense	Exon 2 of 12	NP_000071.1	Q04844
	C17orf107	NM_001145536.2	MANE Select	c.*2224C>G		3_prime_UTR	Exon 3 of 3	NP_001139008.1	Q6ZR85

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHRNE	ENST00000649488.2	MANE Select	c.53G>C	p.Gly18Ala	missense	Exon 2 of 12	ENSP00000497829.1	Q04844
	C17orf107	ENST00000381365.4	TSL:2 MANE Select	c.*2224C>G		3_prime_UTR	Exon 3 of 3	ENSP00000370770.3	Q6ZR85
	CHRNE	ENST00000649830.1		c.-881G>C		5_prime_UTR_premature_start_codon_gain	Exon 2 of 11	ENSP00000496907.1	A0A3B3IRM1

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152040 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000239 AC: 6 AN: 251414 AF XY: 0.0000294

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000528

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000479 AC: 70 AN: 1461880 Hom.: 0 Cov.: 35 AF XY: 0.0000440 AC XY: 32 AN XY: 727240

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53412

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000629 AC: 70 AN: 1112008

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152040 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74276

African (AFR) AF: 0.00 AC: 0 AN: 41384

American (AMR) AF: 0.00 AC: 0 AN: 15260

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5170

South Asian (SAS) AF: 0.00 AC: 0 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10608

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000441 AC: 3 AN: 68004

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00000290 Hom.: 562

Bravo AF: 0.0000151

ExAC AF: 0.0000165 AC: 2

EpiCase AF: 0.000109

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	CHRNE-related disorder (1)
-	1	-	Congenital myasthenic syndrome (1)
-	1	-	Congenital myasthenic syndrome 4A (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.079
BayesDel_addAF	Benign	-0.31	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	5.5
DANN	Benign	0.81
DEOGEN2	Benign	0.059	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.16	N
LIST_S2	Benign	0.38	T
M_CAP	Benign	0.024	T
MetaRNN	Benign	0.064	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.95	L
PhyloP100		-0.57
PrimateAI	Uncertain	0.50	T
PROVEAN	Benign	0.20	N
REVEL	Benign	0.18
Sift	Benign	0.81	T
Sift4G	Benign	0.76	T
Polyphen		0.0010	B
Vest4		0.10
MutPred		0.36		Loss of methylation at R17 (P = 0.0638)
MVP		0.59
MPC		0.58
ClinPred		0.045	T
GERP RS		1.8
PromoterAI		-0.014	Neutral
Varity_R		0.038
gMVP		0.35
Mutation Taster		=94/6	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.41		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.41		Position offset: 1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs4790235; hg19: chr17-4806052;