Genetic Variant CHST6:p.Asp203Glu (chr16-75479220-G-T) – ACMG Classification: Pathogenic (14 pts)

Variant summary

Our verdict is Pathogenic. The variant received 14 ACMG points: 14P and 0B. PS1PM1PM2PP2PP3_StrongPP5

The NM_021615.5(CHST6):c.609C>A(p.Asp203Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely pathogenic in ClinVar.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

CHST6
NM_021615.5 missense

Scores

Clinical Significance

Pathogenic no assertion criteria provided P:1

Conservation

PhyloP100: 3.49

Publications

6 publications found

Variant links:

Genes affected

CHST6 (HGNC:6938): (carbohydrate sulfotransferase 6) The protein encoded by this gene is an enzyme that catalyzes the transfer of a sulfate group to the GlcNAc residues of keratan. Keratan sulfate helps maintain corneal transparency. Defects in this gene are a cause of macular corneal dystrophy (MCD). [provided by RefSeq, Jan 2010]

CHST6 Gene-Disease associations (from GenCC):

macular corneal dystrophy
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae)

CHST6 links:

ENSG00000203472 (HGNC:):

ENSG00000203472 links:

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ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 14 ACMG points.

PS1

Transcript NM_021615.5 (CHST6) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar.

PM1

In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 1 uncertain in NM_021615.5

PM2

Very rare variant in population databases, with high coverage;

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 12 curated pathogenic missense variants (we use a threshold of 10). The gene has 2 curated benign missense variants. Gene score misZ: -0.89985 (below the threshold of 3.09). Trascript score misZ: -1.6448 (below the threshold of 3.09). GenCC associations: The gene is linked to macular corneal dystrophy.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.991

PP5

Variant 16-75479220-G-T is Pathogenic according to our data. Variant chr16-75479220-G-T is described in ClinVar as Pathogenic. ClinVar VariationId is 5072.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHST6	NM_021615.5 link	c.609C>A	p.Asp203Glu	missense_variant	Exon 3 of 3	ENST00000332272.9	NP_067628.1	Q9GZX3
CHST6	NR_163480.1 link	n.733+2597C>A		intron_variant	Intron 3 of 3
CHST6	NR_163481.1 link	n.577+2597C>A		intron_variant	Intron 2 of 2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHST6	ENST00000332272.9 link	c.609C>A	p.Asp203Glu	missense_variant	Exon 3 of 3	3	NM_021615.5	ENSP00000328983.4		Q9GZX3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0;AS_VQSR

AF:

0.00

AC:

AN:

1458162

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

725600

African (AFR)

AF:

0.00

AC:

AN:

33460

American (AMR)

AF:

0.00

AC:

AN:

44670

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26080

East Asian (EAS)

AF:

0.00

AC:

AN:

39682

South Asian (SAS)

AF:

0.00

AC:

AN:

86218

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50468

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111512

Other (OTH)

AF:

0.00

AC:

AN:

60306

GnomAD4 genome

Cov.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

Macular corneal dystrophy

Pathogenic:1

Oct 01, 2000

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.98

BayesDel_addAF

Pathogenic

0.43

BayesDel_noAF

Pathogenic

0.39

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.94

D;D;D

Eigen

Uncertain

0.56

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.97

.;.;D

M_CAP

Pathogenic

0.37

MetaRNN

Pathogenic

0.99

D;D;D

MetaSVM

Uncertain

0.61

MutationAssessor

Pathogenic

3.4

M;M;M

PhyloP100

3.5

PrimateAI

Uncertain

0.76

PROVEAN

Uncertain

-3.9

D;.;D

REVEL

Pathogenic

0.80

Sift

Pathogenic

0.0

D;.;D

Sift4G

Pathogenic

0.0

D;.;D

Polyphen

1.0

D;D;D

Vest4

0.96

MutPred

0.97

Loss of helix (P = 0.079);Loss of helix (P = 0.079);Loss of helix (P = 0.079);

MVP

0.97

MPC

1.0

ClinPred

1.0

GERP RS

2.7

Varity_R

0.96

gMVP

0.96

Mutation Taster

=6/94

disease causing (ClinVar)

(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

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over