rs755463469

Variant names:

• chr17-4899460-G-A
• rs755463469
• ENST00000521575.1:c.-303G>A

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 2P and 12B. PM2 BP4_Strong BP6_Very_Strong

The ENST00000521575.1(C17orf107):​c.-303G>A variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000076 in 1,578,828 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: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000077 (0 hom.)
• Consequence: C17orf107 ENST00000521575.1 5_prime_UTR
• Scores: Splicing: ADA: 0.00004914
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.100
• Publications: 0 publications found

Genes affected

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

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

ACMG classification

Our verdict: Benign. The variant received -10 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.81).
• BP6: Variant 17-4899460-G-A is Benign according to our data. Variant chr17-4899460-G-A is described in ClinVar as Likely_benign. ClinVar VariationId is 254889.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000521575.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHRNE	NM_000080.4	MANE Select	c.1032+8C>T		splice_region intron	N/A	NP_000071.1
	C17orf107	NM_001145536.2	MANE Select	c.-303G>A		upstream_gene	N/A	NP_001139008.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	C17orf107	ENST00000521575.1	TSL:1	c.-303G>A		5_prime_UTR	Exon 1 of 2	ENSP00000429241.1
	CHRNE	ENST00000649488.2	MANE Select	c.1032+8C>T		splice_region intron	N/A	ENSP00000497829.1
	CHRNE	ENST00000649830.1		c.99+8C>T		splice_region intron	N/A	ENSP00000496907.1

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 152052 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

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: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000261 AC: 5 AN: 191702 AF XY: 0.0000193

Gnomad AFR exome AF: 0.000181

Gnomad AMR exome AF: 0.0000709

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000122

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000771 AC: 11 AN: 1426776 Hom.: 0 Cov.: 34 AF XY: 0.00000849 AC XY: 6 AN XY: 706600

African (AFR) AF: 0.0000606 AC: 2 AN: 32986

American (AMR) AF: 0.0000767 AC: 3 AN: 39092

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25356

East Asian (EAS) AF: 0.00 AC: 0 AN: 38298

South Asian (SAS) AF: 0.00 AC: 0 AN: 81456

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49202

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5278

European-Non Finnish (NFE) AF: 0.00000547 AC: 6 AN: 1095982

Other (OTH) AF: 0.00 AC: 0 AN: 59126

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 152052 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74276

African (AFR) AF: 0.00 AC: 0 AN: 41360

American (AMR) AF: 0.0000654 AC: 1 AN: 15286

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: 4834

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10622

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

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67992

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

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	1	Congenital myasthenic syndrome 4A (1)
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.81
CADD	Benign	1.5
DANN	Benign	0.88
PhyloP100		-0.10
PromoterAI		-0.19	Neutral

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.000049
dbscSNV1_RF	Benign	0.0020
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: rs755463469; hg19: chr17-4802755;