chr3-15478979-T-C

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 1P and 2B. PP2BP4_Moderate

The NM_005677.4(COLQ):c.391A>G(p.Lys131Glu) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.000339 in 1,614,164 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00034 ( 0 hom. )

Consequence

COLQ
NM_005677.4 missense, splice_region

Scores

Splicing: ADA: 0.02528

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 4.72

Publications

3 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:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 16 curated pathogenic missense variants (we use a threshold of 10). The gene has 5 curated benign missense variants. Gene score misZ: -0.21928 (below the threshold of 3.09). Trascript score misZ: -0.17745 (below the threshold of 3.09). GenCC associations: The gene is linked to congenital myasthenic syndrome 5.

BP4

Computational evidence support a benign effect (MetaRNN=0.21136287).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COLQ	NM_005677.4 link	c.391A>G	p.Lys131Glu	missense_variant, splice_region_variant	Exon 5 of 17	ENST00000383788.10	NP_005668.2	Q9Y215-1
COLQ	NM_080538.2 link	c.361A>G	p.Lys121Glu	missense_variant, splice_region_variant	Exon 5 of 17		NP_536799.1	Q9Y215-2
COLQ	NM_080539.4 link	c.289A>G	p.Lys97Glu	missense_variant, splice_region_variant	Exon 4 of 16		NP_536800.2	Q9Y215-3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COLQ	ENST00000383788.10 link	c.391A>G	p.Lys131Glu	missense_variant, splice_region_variant	Exon 5 of 17	1	NM_005677.4	ENSP00000373298.3		Q9Y215-1
COLQ	ENST00000603808.5 link	c.391A>G	p.Lys131Glu	missense_variant, splice_region_variant	Exon 5 of 17	1		ENSP00000474271.1		A0A0C4DGS2

Frequencies

GnomAD3 genomes

AF:

0.000335

AC:

AN:

152154

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000573

Gnomad OTH

AF:

0.000957

GnomAD2 exomes

AF:

0.000247

AC:

AN:

251354

AF XY:

0.000258

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000277

Gnomad NFE exome

AF:

0.000422

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.000340

AC:

497

AN:

1461892

Hom.:

Cov.:

AF XY:

0.000338

AC XY:

246

AN XY:

727248

show subpopulations

African (AFR)

AF:

0.0000597

AC:

AN:

33480

American (AMR)

AF:

0.000134

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.0000383

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.000393

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000404

AC:

449

AN:

1112010

Other (OTH)

AF:

0.000298

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.463

Heterozygous variant carriers

111

139

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<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:

0.000335

AC:

AN:

152272

Hom.:

Cov.:

AF XY:

0.000282

AC XY:

AN XY:

74460

show subpopulations

African (AFR)

AF:

0.000120

AC:

AN:

41550

American (AMR)

AF:

0.000262

AC:

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.0000942

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000573

AC:

AN:

68012

Other (OTH)

AF:

0.000947

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

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:

0.000475

Hom.:

Bravo

AF:

0.000261

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000181

AC:

EpiCase

AF:

0.000545

EpiControl

AF:

0.000474

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Congenital myasthenic syndrome 5

Uncertain:3

Jan 14, 2020

Revvity Omics, Revvity

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Aug 14, 2018

Baylor Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

Aug 23, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces lysine, which is basic and polar, with glutamic acid, which is acidic and polar, at codon 131 of the COLQ protein (p.Lys131Glu). This variant is present in population databases (rs142980906, gnomAD 0.04%). This variant has not been reported in the literature in individuals affected with COLQ-related conditions. ClinVar contains an entry for this variant (Variation ID: 197779). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Not Available"; Align-GVGD: "Class C55"). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

not provided

Uncertain:2

Jan 20, 2015

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Aug 01, 2020

CeGaT Center for Human Genetics Tuebingen

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.62

BayesDel_addAF

Benign

-0.048

BayesDel_noAF

Uncertain

0.020

CADD

Pathogenic

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.29

T;.;.;.;.

Eigen

Uncertain

0.50

Eigen_PC

Uncertain

0.52

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.93

D;D;D;T;T

M_CAP

Uncertain

0.23

MetaRNN

Benign

0.21

T;T;T;T;T

MetaSVM

Uncertain

0.63

MutationAssessor

Benign

1.5

L;.;.;.;.

PhyloP100

4.7

PrimateAI

Uncertain

0.75

PROVEAN

Benign

-1.2

N;N;.;N;.

REVEL

Uncertain

0.61

Sift

Benign

0.051

T;D;.;.;.

Sift4G

Benign

0.20

T;T;T;T;T

Polyphen

0.99

D;D;.;D;.

Vest4

0.65

MVP

0.91

MPC

0.14

ClinPred

0.059

GERP RS

5.3

Varity_R

0.39

gMVP

0.36

Mutation Taster

=45/55

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.025

dbscSNV1_RF

Benign

0.20

SpliceAI score (max)

0.31

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.31

Position offset: -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