Genetic Variant COG6:p.Gly6Trp (chr13-39655742-G-T) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_020751.3(COG6):c.16G>T(p.Gly6Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000693 in 1,443,262 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G6R) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 34)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

COG6
NM_020751.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.25

Publications

0 publications found

Variant links:

Genes affected

COG6 (HGNC:18621): (component of oligomeric golgi complex 6) This gene encodes a subunit of the conserved oligomeric Golgi complex that is required for maintaining normal structure and activity of the Golgi apparatus. The encoded protein is organized with conserved oligomeric Golgi complex components 5, 7 and 8 into a sub-complex referred to as lobe B. Alternative splicing results in multiple transcript variants.[provided by RefSeq, Feb 2009]

COG6 Gene-Disease associations (from GenCC):

COG6-congenital disorder of glycosylation
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: PanelApp Australia, Orphanet, Labcorp Genetics (formerly Invitae)
hypohidrosis-enamel hypoplasia-palmoplantar keratoderma-intellectual disability syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

COG6 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.29712543).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COG6	NM_020751.3 link	c.16G>T	p.Gly6Trp	missense_variant	Exon 1 of 19	ENST00000455146.8	NP_065802.1	Q9Y2V7-1A0A024RDW5
COG6	NM_001145079.2 link	c.16G>T	p.Gly6Trp	missense_variant	Exon 1 of 19		NP_001138551.1	Q9Y2V7-2A0A140VJG7
COG6	XM_011535168.2 link	c.16G>T	p.Gly6Trp	missense_variant	Exon 1 of 20		XP_011533470.1
COG6	NR_026745.1 link	n.116G>T		non_coding_transcript_exon_variant	Exon 1 of 20

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COG6	ENST00000455146.8 link	c.16G>T	p.Gly6Trp	missense_variant	Exon 1 of 19	1	NM_020751.3	ENSP00000397441.2		Q9Y2V7-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.93e-7

AC:

AN:

1443262

Hom.:

Cov.:

AF XY:

0.00000140

AC XY:

AN XY:

716334

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33016

American (AMR)

AF:

0.00

AC:

AN:

43168

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25778

East Asian (EAS)

AF:

0.00

AC:

AN:

38658

South Asian (SAS)

AF:

0.00

AC:

AN:

83864

European-Finnish (FIN)

AF:

0.0000196

AC:

AN:

50956

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5248

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1103040

Other (OTH)

AF:

0.00

AC:

AN:

59534

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.225

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.43

BayesDel_addAF

Benign

-0.0094

BayesDel_noAF

Benign

-0.25

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.0086

.;T;T

Eigen

Benign

-0.085

Eigen_PC

Benign

-0.15

FATHMM_MKL

Uncertain

0.80

LIST_S2

Uncertain

0.86

D;D;D

M_CAP

Benign

0.074

MetaRNN

Benign

0.30

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.9

L;L;.

PhyloP100

3.2

PrimateAI

Uncertain

0.56

PROVEAN

Benign

-0.26

N;N;.

REVEL

Benign

0.094

Sift

Uncertain

0.0040

D;D;.

Sift4G

Uncertain

0.028

D;D;D

Polyphen

0.95

.;P;.

Vest4

0.47

MutPred

0.46

Loss of disorder (P = 1e-04);Loss of disorder (P = 1e-04);Loss of disorder (P = 1e-04);

MVP

0.14

MPC

0.18

ClinPred

0.90

GERP RS

3.8

PromoterAI

-0.11

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.7

Varity_R

0.088

gMVP

0.32

Mutation Taster

=89/11

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over