Genetic Variant ENST00000521575.1:c.-304C>T (chr17-4899459-C-T) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM2BP4_StrongBP6_Moderate

The ENST00000521575.1(C17orf107):c.-304C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000021 in 1,425,694 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 (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

C17orf107
ENST00000521575.1 5_prime_UTR_premature_start_codon_gain

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.143

Publications

0 publications found

Variant links:

Genes affected

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

C17orf107 links:

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]

CHRNE Gene-Disease associations (from GenCC):

congenital myasthenic syndrome
Inheritance: AR Classification: DEFINITIVE Submitted by: Illumina
congenital myasthenic syndrome 4A
Inheritance: AD, AR Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), PanelApp Australia
congenital myasthenic syndrome 4B
Inheritance: AR Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), PanelApp Australia
congenital myasthenic syndrome 4C
Inheritance: AR Classification: STRONG Submitted by: Genomics England PanelApp
postsynaptic congenital myasthenic syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CHRNE links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.75).

BP6

Variant 17-4899459-C-T is Benign according to our data. Variant chr17-4899459-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 1096373.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHRNE	NM_000080.4 link	c.1032+9G>A		intron_variant	Intron 9 of 11	ENST00000649488.2	NP_000071.1	Q04844
C17orf107	NM_001145536.2 link	c.-304C>T		upstream_gene_variant		ENST00000381365.4	NP_001139008.1	Q6ZR85

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHRNE	ENST00000649488.2 link	c.1032+9G>A		intron_variant	Intron 9 of 11		NM_000080.4	ENSP00000497829.1		Q04844
C17orf107	ENST00000381365.4 link	c.-304C>T		upstream_gene_variant		2	NM_001145536.2	ENSP00000370770.3		Q6ZR85

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000526

AC:

AN:

190132

AF XY:

0.00

show subpopulations

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000210

AC:

AN:

1425694

Hom.:

Cov.:

AF XY:

0.00000283

AC XY:

AN XY:

705942

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33034

American (AMR)

AF:

0.00

AC:

AN:

38876

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25346

East Asian (EAS)

AF:

0.00

AC:

AN:

38222

South Asian (SAS)

AF:

0.0000123

AC:

AN:

81366

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49132

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5292

European-Non Finnish (NFE)

AF:

0.00000183

AC:

AN:

1095336

Other (OTH)

AF:

0.00

AC:

AN:

59090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Congenital myasthenic syndrome 4A

Benign:1

Aug 23, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.75

CADD

Benign

4.7

(source)

DANN

Benign

0.86

PhyloP100

0.14

PromoterAI

-0.0079

Neutral

(source)

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

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ENST00000521575.1:c.-304C>T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over