NM_130468.4:c.878A>G

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 14 ACMG points: 14P and 0B. PM2PP3_StrongPP5_Very_Strong

The NM_130468.4(CHST14):c.878A>G(p.Tyr293Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000112 in 1,614,158 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 Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

CHST14
NM_130468.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4O:1

Conservation

PhyloP100: 9.32

Publications

15 publications found

Variant links:

Genes affected

CHST14 (HGNC:24464): (carbohydrate sulfotransferase 14) This gene encodes a member of the HNK-1 family of sulfotransferases. The encoded protein transfers sulfate to the C-4 hydroxyl of N-acetylgalactosamine residues in dermatan sulfate. Mutations in this gene have been associated with adducted thumb-clubfoot syndrome.[provided by RefSeq, Mar 2010]

CHST14 Gene-Disease associations (from GenCC):

Ehlers-Danlos syndrome, musculocontractural type 1
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, G2P, PanelApp Australia, Ambry Genetics, Labcorp Genetics (formerly Invitae)
Ehlers-Danlos syndrome, musculocontractural type
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CHST14 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.985

PP5

Variant 15-40472091-A-G is Pathogenic according to our data. Variant chr15-40472091-A-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2339.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHST14	NM_130468.4 link	c.878A>G	p.Tyr293Cys	missense_variant	Exon 1 of 1	ENST00000306243.7	NP_569735.1	Q8NCH0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHST14	ENST00000306243.7 link	c.878A>G	p.Tyr293Cys	missense_variant	Exon 1 of 1	6	NM_130468.4	ENSP00000307297.6		Q8NCH0
CHST14	ENST00000559991.1 link	c.803A>G	p.Tyr268Cys	missense_variant	Exon 2 of 2	5		ENSP00000453882.1		H0YN65

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000119

AC:

AN:

251456

AF XY:

0.00000736

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000116

AC:

AN:

1461868

Hom.:

Cov.:

AF XY:

0.00000688

AC XY:

AN XY:

727240

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:

0.0000756

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53402

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000126

AC:

AN:

1112004

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.513

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152290

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74468

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41556

American (AMR)

AF:

0.00

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5168

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68024

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:

0.0000129

Hom.:

Bravo

AF:

0.0000189

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:4Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Ehlers-Danlos syndrome, musculocontractural type

Pathogenic:1Other:1

Jan 19, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces tyrosine, which is neutral and polar, with cysteine, which is neutral and slightly polar, at codon 293 of the CHST14 protein (p.Tyr293Cys). This variant is present in population databases (rs121908258, gnomAD 0.007%). This missense change has been observed in individual(s) with clinical features of autosomal recessive CHST14-related conditions (PMID: 10766984, 20004762, 20533528, 21744491). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 2339). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is expected to disrupt CHST14 protein function with a positive predictive value of 80%. Experimental studies have shown that this missense change affects CHST14 function (PMID: 20004762). For these reasons, this variant has been classified as Pathogenic. -

UniProtKB/Swiss-Prot

Significance:not provided

Review Status:no classification provided

Collection Method:literature only

- -

Ehlers-Danlos syndrome, musculocontractural type 1

Pathogenic:1

Aug 01, 2010

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

not provided

Pathogenic:1

Oct 04, 2017

GeneDx

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The Y293C likely pathogenic variant in the CHST14 gene has been reported in the homozygous state in a patient with adducted thumb-clubfoot syndrome (Dundar et al., 2009). This variant has also been reported a patient with dermatan 4-O-sulfotransferase 1 deficiency who also harbored an additional CHST14 variant in trans (Shimizu et al., 2011). This variant is not observed at a significant frequency in large population cohorts (Lek et al., 2016). The Y293C variant is a non-conservative amino acid substitution, which is likely to impact secondary protein structure as these residues differ in polarity, charge, size and/or other properties. This substitution occurs at a position that is conserved across species, and in silico analysis predicts this variant is probably damaging to the protein structure/function. Finally, functional studies demonstrate that this variant leads to decreased sulfotransferase activity (Miyake et al., 2010). -

Cardiovascular phenotype

Pathogenic:1

Jun 12, 2020

Ambry Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.Y293C pathogenic mutation (also known as c.878A>G), located in coding exon 1 of the CHST14 gene, results from an A to G substitution at nucleotide position 878. The tyrosine at codon 293 is replaced by cysteine, an amino acid with highly dissimilar properties. This variant has been identified as homozygous or compound heterozygous in multiple individuals with dermatan 4-O-sulfotransferase 1 deficient Ehlers-Danlos Syndrome (D4ST1-deficient EDS) (Dündar M et al. Am. J. Hum. Genet., 2009 Dec;85:873-82; Miyake N et al. Hum. Mutat., 2010 Aug;31:966-74; Shimizu K et al. Am. J. Med. Genet. A, 2011 Aug;155A:1949-58). A functional study shows that this variant causes reduced sulfotransferase activity in transfected cells (Miyake N et al. Hum. Mutat., 2010 Aug;31:966-74). Based on the supporting evidence, this alteration is interpreted as a disease-causing mutation. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.33

BayesDel_noAF

Pathogenic

0.42

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.80

D;.

Eigen

Pathogenic

0.87

Eigen_PC

Pathogenic

0.79

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.95

D;D

M_CAP

Pathogenic

0.37

MetaRNN

Pathogenic

0.99

D;D

MetaSVM

Uncertain

0.72

MutationAssessor

Pathogenic

3.6

H;.

PhyloP100

9.3

PrimateAI

Uncertain

0.77

PROVEAN

Pathogenic

-8.7

D;D

REVEL

Pathogenic

0.90

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

D;.

Vest4

0.96

MutPred

0.96

Loss of phosphorylation at Y293 (P = 0.0522);.;

MVP

0.94

MPC

2.3

ClinPred

1.0

GERP RS

4.9

Varity_R

0.97

gMVP

0.95

Mutation Taster

=7/93

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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NM_130468.4:c.878A>G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over