chr3-15451237-G-A

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBS1_SupportingBS2

The NM_005677.4(COLQ):c.*407C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000621 in 273,670 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00038 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00092 ( 4 hom. )

Consequence

COLQ
NM_005677.4 3_prime_UTR

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -2.78

Publications

0 publications found

Variant links:

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]

COLQ Gene-Disease associations (from GenCC):

congenital myasthenic syndrome 5
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, PanelApp Australia

COLQ links:

ENSG00000293553 (HGNC:):

ENSG00000293553 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.92).

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.000381 (58/152152) while in subpopulation SAS AF = 0.00417 (20/4794). AF 95% confidence interval is 0.00276. There are 0 homozygotes in GnomAd4. There are 31 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High Homozygotes in GnomAdExome4 at 4 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
COLQ	NM_005677.4 link	c.*407C>T	3_prime_UTR_variant	Exon 17 of 17	ENST00000383788.10	NP_005668.2	Q9Y215-1
COLQ	NM_080538.2 link	c.*407C>T	3_prime_UTR_variant	Exon 17 of 17		NP_536799.1	Q9Y215-2
COLQ	NM_080539.4 link	c.*407C>T	3_prime_UTR_variant	Exon 16 of 16		NP_536800.2	Q9Y215-3

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein	UniProt
COLQ	ENST00000383788.10 link	c.*407C>T	3_prime_UTR_variant	Exon 17 of 17	1	NM_005677.4	ENSP00000373298.3	Q9Y215-1
ENSG00000293553	ENST00000629729.3 link	n.*291+208C>T	intron_variant	Intron 3 of 5	5		ENSP00000518887.1
COLQ	ENST00000603808.5 link	c.*407C>T	downstream_gene_variant		1		ENSP00000474271.1	A0A0C4DGS2

Frequencies

GnomAD3 genomes

AF:

0.000388

AC:

AN:

152034

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00438

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000426

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.000922

AC:

112

AN:

121518

Hom.:

Cov.:

AF XY:

0.00131

AC XY:

AN XY:

64102

show subpopulations

African (AFR)

AF:

0.000440

AC:

AN:

4544

American (AMR)

AF:

0.00

AC:

AN:

7100

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3086

East Asian (EAS)

AF:

0.00

AC:

AN:

6868

South Asian (SAS)

AF:

0.00492

AC:

AN:

17284

European-Finnish (FIN)

AF:

0.000180

AC:

AN:

5544

Middle Eastern (MID)

AF:

0.00

AC:

AN:

452

European-Non Finnish (NFE)

AF:

0.000284

AC:

AN:

70344

Other (OTH)

AF:

0.000635

AC:

AN:

6296

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.498

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000381

AC:

AN:

152152

Hom.:

Cov.:

AF XY:

0.000417

AC XY:

AN XY:

74396

show subpopulations

African (AFR)

AF:

0.000169

AC:

AN:

41510

American (AMR)

AF:

0.000131

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00417

AC:

AN:

4794

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000427

AC:

AN:

67992

Other (OTH)

AF:

0.00

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.513

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000485

Hom.:

Bravo

AF:

0.000272

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Congenital myasthenic syndrome 5

Uncertain:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.92

CADD

Benign

0.15

(source)

DANN

Benign

0.71

PhyloP100

-2.8

Mutation Taster

=100/0

polymorphism

(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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over