rs909353

Positions:

• chr3-15478966-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_005677.4(COLQ):​c.393+11C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0011 in 1,614,170 control chromosomes in the GnomAD database, including 20 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0059 (8 hom., cov: 32)
  • Exomes 𝑓: 0.00061 (12 hom.)
• Consequence: COLQ NM_005677.4 intron
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4
• Conservation: PhyloP100: -0.425

Genes affected

COLQ (HGNC:2226): (collagen like tail subunit of asymmetric acetylcholinesterase) This gene encodes the subunit of a collagen-like molecule associated with acetylcholinesterase in skeletal muscle. Each molecule is composed of three identical subunits. Each subunit contains a proline-rich attachment domain (PRAD) that binds an acetylcholinesterase tetramer to anchor the catalytic subunit of the enzyme to the basal lamina. Mutations in this gene are associated with endplate acetylcholinesterase deficiency. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant 3-15478966-G-A is Benign according to our data. Variant chr3-15478966-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 259856.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00586 (893/152292) while in subpopulation AFR AF= 0.0205 (854/41564). AF 95% confidence interval is 0.0194. There are 8 homozygotes in gnomad4. There are 399 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 8 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
COLQ	NM_005677.4	c.393+11C>T		intron_variant		ENST00000383788.10
COLQ	NM_080538.2	c.363+11C>T		intron_variant
COLQ	NM_080539.4	c.291+11C>T		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COLQ	ENST00000383788.10	c.393+11C>T		intron_variant		1	NM_005677.4	P4

Frequencies

GnomAD3 genomes AF: 0.00587 AC: 893 AN: 152174 Hom.: 8 Cov.: 32

Gnomad AFR AF: 0.0206

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00183

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00239

GnomAD3 exomes AF: 0.00142 AC: 357 AN: 251336 Hom.: 5 AF XY: 0.00105 AC XY: 142 AN XY: 135826

Gnomad AFR exome AF: 0.0200

Gnomad AMR exome AF: 0.000520

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000653

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000352

Gnomad OTH exome AF: 0.00130

GnomAD4 exome AF: 0.000607 AC: 888 AN: 1461878 Hom.: 12 Cov.: 31 AF XY: 0.000525 AC XY: 382 AN XY: 727242

Gnomad4 AFR exome AF: 0.0230

Gnomad4 AMR exome AF: 0.000626

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000504

Gnomad4 SAS exome AF: 0.0000232

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000198

Gnomad4 OTH exome AF: 0.00108

GnomAD4 genome AF: 0.00586 AC: 893 AN: 152292 Hom.: 8 Cov.: 32 AF XY: 0.00536 AC XY: 399 AN XY: 74468

Gnomad4 AFR AF: 0.0205

Gnomad4 AMR AF: 0.00183

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000588

Gnomad4 OTH AF: 0.00237

Alfa AF: 0.00324 Hom.: 0

Bravo AF: 0.00659

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Congenital myasthenic syndrome 5 Benign:2

Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 28, 2024	- -

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

-

- -

not provided Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Oct 05, 2021

See Variant Classification Assertion Criteria. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	14
DANN	Benign	0.64

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: rs909353; hg19: chr3-15520473;