1-36097753-G-A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 1P and 4B. PP3BS2

The NM_005202.4(COL8A2):c.1928C>T(p.Pro643Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000242 in 1,613,836 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000025 ( 0 hom. )

Consequence

COL8A2
NM_005202.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.19

Publications

0 publications found

Variant links:

Genes affected

COL8A2 (HGNC:2216): (collagen type VIII alpha 2 chain) This gene encodes the alpha 2 chain of type VIII collagen. This protein is a major component of the basement membrane of the corneal endothelium and forms homo- or heterotrimers with alpha 1 (VIII) type collagens. Defects in this gene are associated with Fuchs endothelial corneal dystrophy and posterior polymorphous corneal dystrophy type 2. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jun 2014]

COL8A2 Gene-Disease associations (from GenCC):

corneal dystrophy, Fuchs endothelial, 1
Inheritance: AD Classification: STRONG Submitted by: G2P
posterior polymorphous corneal dystrophy 2
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
Fuchs' endothelial dystrophy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
posterior polymorphous corneal dystrophy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

COL8A2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.79

BS2

High AC in GnomAdExome4 at 37 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COL8A2	NM_005202.4 link	c.1928C>T	p.Pro643Leu	missense_variant	Exon 4 of 4	ENST00000397799.2	NP_005193.1	P25067
COL8A2	NM_001294347.2 link	c.1733C>T	p.Pro578Leu	missense_variant	Exon 4 of 4		NP_001281276.1	P25067E9PP49

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
COL8A2	ENST00000397799.2 link	c.1928C>T	p.Pro643Leu	missense_variant	Exon 4 of 4	5	NM_005202.4	ENSP00000380901.1	P25067
COL8A2	ENST00000481785.1 link	c.1733C>T	p.Pro578Leu	missense_variant	Exon 2 of 2	1		ENSP00000436433.1	E9PP49
COL8A2	ENST00000303143.9 link	c.1928C>T	p.Pro643Leu	missense_variant	Exon 2 of 2	2		ENSP00000305913.4	P25067

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152206

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000199

AC:

AN:

251326

AF XY:

0.0000147

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.0000992

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000253

AC:

AN:

1461512

Hom.:

Cov.:

AF XY:

0.0000316

AC XY:

AN XY:

727068

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000504

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86250

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53052

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000297

AC:

AN:

1112010

Other (OTH)

AF:

0.0000166

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.472

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152324

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74474

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41572

American (AMR)

AF:

0.00

AC:

AN:

15310

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68014

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000965

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Aug 20, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1928C>T (p.P643L) alteration is located in exon 2 (coding exon 2) of the COL8A2 gene. This alteration results from a C to T substitution at nucleotide position 1928, causing the proline (P) at amino acid position 643 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.93

BayesDel_addAF

Pathogenic

0.21

BayesDel_noAF

Pathogenic

0.23

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.56

D;D;.

Eigen

Pathogenic

0.72

Eigen_PC

Pathogenic

0.70

FATHMM_MKL

Uncertain

0.90

LIST_S2

Pathogenic

0.98

.;D;D

M_CAP

Benign

0.049

MetaRNN

Pathogenic

0.79

D;D;D

MetaSVM

Uncertain

-0.053

MutationAssessor

Uncertain

2.1

M;M;.

PhyloP100

8.2

PrimateAI

Pathogenic

0.85

PROVEAN

Pathogenic

-4.6

D;D;D

REVEL

Uncertain

0.64

Sift

Benign

0.40

T;T;T

Sift4G

Uncertain

0.0030

D;D;D

Polyphen

1.0

D;D;.

Vest4

0.83

MVP

0.85

MPC

1.0

ClinPred

0.95

GERP RS

4.9

Varity_R

0.42

gMVP

0.65

Mutation Taster

=43/57

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

1-36097753-G-A

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