Genetic Variant COG4:p.Leu773Gln (chr16-70481062-A-T) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PM5PP3_Moderate

The NM_015386.3(COG4):c.2318T>A(p.Leu773Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,034 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. L773R) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

COG4
NM_015386.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 8.99

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

COG4-congenital disorder of glycosylation
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P, ClinGen, PanelApp Australia, Ambry Genetics
microcephalic osteodysplastic dysplasia, Saul-Wilson type
Inheritance: AD, AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics, G2P

COG4 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr16-70481062-A-C is described in ClinVar as [Pathogenic]. Clinvar id is 31928.Status of the report is no_assertion_criteria_provided, 0 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.857

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COG4	NM_015386.3 link	c.2318T>A	p.Leu773Gln	missense_variant	Exon 19 of 19	ENST00000323786.10	NP_056201.2	Q9H9E3J3KNI1Q8N8L9
COG4	NM_001195139.2 link	c.2243T>A	p.Leu748Gln	missense_variant	Exon 18 of 18		NP_001182068.2	Q9H9E3A0A0A0MS45Q8N8L9
COG4	NM_001365426.1 link	c.1892T>A	p.Leu631Gln	missense_variant	Exon 20 of 20		NP_001352355.1
COG4	NR_158212.1 link	n.2277T>A		non_coding_transcript_exon_variant	Exon 19 of 19

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COG4	ENST00000323786.10 link	c.2318T>A	p.Leu773Gln	missense_variant	Exon 19 of 19	1	NM_015386.3	ENSP00000315775.5		J3KNI1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461034

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726830

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

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:

0.00

AC:

AN:

52590

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1112008

Other (OTH)

AF:

0.00

AC:

AN:

60378

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

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

BayesDel_addAF

Pathogenic

0.35

BayesDel_noAF

Pathogenic

0.27

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.26

T;T;T

Eigen

Pathogenic

0.98

Eigen_PC

Pathogenic

0.93

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Pathogenic

0.98

D;D;D

M_CAP

Uncertain

0.093

MetaRNN

Pathogenic

0.86

D;D;D

MetaSVM

Uncertain

0.13

PhyloP100

9.0

PrimateAI

Pathogenic

0.84

PROVEAN

Pathogenic

-5.0

D;.;.

REVEL

Pathogenic

0.76

Sift

Uncertain

0.0020

D;.;.

Sift4G

Uncertain

0.0020

D;D;D

Vest4

0.93

MVP

0.92

MPC

0.66

ClinPred

0.99

GERP RS

6.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

gMVP

0.90

Mutation Taster

=4/96

disease causing

(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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16-70481062-A-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over