chr16-70481087-T-C

Position:

chr16-70481087-T-C

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2BP4_ModerateBS1_Supporting

The NM_015386.3(COG4):c.2293A>G(p.Thr765Ala) variant causes a missense change. The variant allele was found at a frequency of 0.0000254 in 1,613,234 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000025 ( 1 hom. )

Consequence

COG4
NM_015386.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 6.04

Variant links:

Genes affected

COG4 (HGNC:18620): (component of oligomeric golgi complex 4) The protein encoded by this gene is a component of an oligomeric protein complex involved in the structure and function of the Golgi apparatus. Defects in this gene may be a cause of congenital disorder of glycosylation type IIj. Two transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Aug 2010]

COG4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.20804444).

BS1

Variant frequency is greater than expected in population amr. gnomad4_exome allele frequency = 0.0000253 (37/1461120) while in subpopulation AMR AF= 0.000783 (35/44722). AF 95% confidence interval is 0.000578. There are 1 homozygotes in gnomad4_exome. There are 19 alleles in male gnomad4_exome subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
COG4	NM_015386.3 linkuse as main transcript	c.2293A>G	p.Thr765Ala	missense_variant	19/19	ENST00000323786.10
COG4	NM_001195139.2 linkuse as main transcript	c.2218A>G	p.Thr740Ala	missense_variant	18/18
COG4	NM_001365426.1 linkuse as main transcript	c.1867A>G	p.Thr623Ala	missense_variant	20/20
COG4	NR_158212.1 linkuse as main transcript	n.2252A>G		non_coding_transcript_exon_variant	19/19

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COG4	ENST00000323786.10 linkuse as main transcript	c.2293A>G	p.Thr765Ala	missense_variant	19/19	1	NM_015386.3	P1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

151996

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000128

AC:

AN:

250452

Hom.:

AF XY:

0.000118

AC XY:

AN XY:

135548

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000839

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.0000253

AC:

AN:

1461120

Hom.:

Cov.:

AF XY:

0.0000261

AC XY:

AN XY:

726884

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000783

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152114

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74374

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000567

ExAC

AF:

0.0000659

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 23, 2022

Unlikely to be causative of Saul-Wilson syndrome (AD) Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

COG4-congenital disorder of glycosylation

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 22, 2022

This sequence change replaces threonine, which is neutral and polar, with alanine, which is neutral and non-polar, at codon 765 of the COG4 protein (p.Thr765Ala). This variant is present in population databases (rs184431716, gnomAD 0.09%). This variant has not been reported in the literature in individuals affected with COG4-related conditions. 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: "Probably Damaging"; Align-GVGD: "Class C0"). 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

0.0060

BayesDel_noAF

Pathogenic

0.16

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.17

T;T;T

Eigen

Pathogenic

0.82

Eigen_PC

Pathogenic

0.80

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.97

D;D;D

M_CAP

Benign

0.063

MetaRNN

Benign

0.21

T;T;T

MetaSVM

Uncertain

-0.19

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.75

PROVEAN

Pathogenic

-4.4

D;.;.

REVEL

Uncertain

0.41

Sift

Uncertain

0.0030

D;.;.

Sift4G

Uncertain

0.0050

D;D;D

Vest4

0.89

MVP

0.67

MPC

0.64

ClinPred

0.41

GERP RS

6.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

gMVP

0.80

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over