Genetic Variant CHST7:p.Val320Leu (chrX-46574889-G-C) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_019886.4(CHST7):c.958G>C(p.Val320Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000569 in 1,159,447 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 14 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 12/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00034 ( 0 hom., 7 hem., cov: 24)

Exomes 𝑓: 0.000027 ( 0 hom. 7 hem. )

Consequence

CHST7
NM_019886.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.545

Variant links:

Genes affected

CHST7 (HGNC:13817): (carbohydrate sulfotransferase 7) This gene is a member of the Gal/GalNAc/GlcNAc (galactose/N-acetylgalactosamine/N-acetylglucosamine) 6-O-sulfotransferase (GST) family. Members of this family encode enzymes that catalyze the specific addition of sulfate groups to distinct hydroxyl and amino groups of carbohydrates. The encoded protein catalyzes the sulfation of 6-hydroxyl group of GalNAc in chondroitin. [provided by RefSeq, Aug 2013]

CHST7 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.119083256).

BS2

High Hemizygotes in GnomAd4 at 7 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHST7	NM_019886.4 link	c.958G>C	p.Val320Leu	missense_variant	Exon 1 of 2	ENST00000276055.4	NP_063939.2	Q9NS84

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHST7	ENST00000276055.4 link	c.958G>C	p.Val320Leu	missense_variant	Exon 1 of 2	1	NM_019886.4	ENSP00000276055.3		Q9NS84

Frequencies

GnomAD3 genomes

AF:

0.000338

AC:

AN:

112585

Hom.:

Cov.:

AF XY:

0.000201

AC XY:

AN XY:

34803

show subpopulations

Gnomad AFR

AF:

0.00119

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:

0.0000188

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000631

AC:

AN:

95114

Hom.:

AF XY:

0.0000378

AC XY:

AN XY:

26482

show subpopulations

Gnomad AFR exome

AF:

0.000945

Gnomad AMR exome

AF:

0.0000531

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:

0.00

GnomAD4 exome

AF:

0.0000267

AC:

AN:

1046862

Hom.:

Cov.:

AF XY:

0.0000208

AC XY:

AN XY:

336398

show subpopulations

Gnomad4 AFR exome

AF:

0.000842

Gnomad4 AMR exome

AF:

0.000107

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:

0.00

Gnomad4 OTH exome

AF:

0.0000904

GnomAD4 genome

AF:

0.000338

AC:

AN:

112585

Hom.:

Cov.:

AF XY:

0.000201

AC XY:

AN XY:

34803

show subpopulations

Gnomad4 AFR

AF:

0.00119

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000188

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000427

Hom.:

Bravo

AF:

0.000559

ExAC

AF:

0.0000596

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Sep 01, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.958G>C (p.V320L) alteration is located in exon 1 (coding exon 1) of the CHST7 gene. This alteration results from a G to C substitution at nucleotide position 958, causing the valine (V) at amino acid position 320 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

Benign

0.086

BayesDel_addAF

Benign

-0.33

BayesDel_noAF

Benign

-0.30

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.23

FATHMM_MKL

Benign

0.056

LIST_S2

Benign

0.53

M_CAP

Pathogenic

0.89

MetaRNN

Benign

0.12

MetaSVM

Uncertain

-0.16

MutationAssessor

Benign

0.11

PrimateAI

Pathogenic

0.90

PROVEAN

Benign

-0.20

REVEL

Benign

0.21

Sift

Benign

0.19

Sift4G

Benign

0.36

Polyphen

0.067

Vest4

0.047

MutPred

0.47

Loss of MoRF binding (P = 0.0977);

MVP

0.88

ClinPred

0.011

GERP RS

3.2

Varity_R

0.11

gMVP

0.41

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