rs751961615

Positions:

chr10-72007549-C-T

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBS1_Supporting

The NM_004273.5(CHST3):c.518C>T(p.Ser173Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000028 in 1,606,012 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000028 ( 0 hom. )

Consequence

CHST3
NM_004273.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 2.46

Variant links:

Genes affected

CHST3 (HGNC:1971): (carbohydrate sulfotransferase 3) This gene encodes an enzyme which catalyzes the sulfation of chondroitin, a proteoglycan found in the extracellular matrix and most cells which is involved in cell migration and differentiation. Mutations in this gene are associated with spondylepiphyseal dysplasia and humerospinal dysostosis. [provided by RefSeq, Mar 2009]

CHST3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.048679173).

BS1

Variant frequency is greater than expected in population amr. gnomad4_exome allele frequency = 0.0000275 (40/1453756) while in subpopulation AMR AF= 0.000896 (40/44654). AF 95% confidence interval is 0.000676. There are 0 homozygotes in gnomad4_exome. There are 13 alleles in male gnomad4_exome subpopulation. Median coverage is 31. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CHST3	NM_004273.5 linkuse as main transcript	c.518C>T	p.Ser173Phe	missense_variant	3/3	ENST00000373115.5	NP_004264.2	Q7LGC8
CHST3	XM_006718075.5 linkuse as main transcript	c.518C>T	p.Ser173Phe	missense_variant	3/3		XP_006718138.1	Q7LGC8
CHST3	XM_011540369.3 linkuse as main transcript	c.518C>T	p.Ser173Phe	missense_variant	3/3		XP_011538671.1	Q7LGC8
CHST3	XM_047426022.1 linkuse as main transcript	c.518C>T	p.Ser173Phe	missense_variant	3/3		XP_047281978.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CHST3	ENST00000373115.5 linkuse as main transcript	c.518C>T	p.Ser173Phe	missense_variant	3/3	1	NM_004273.5	ENSP00000362207.4		Q7LGC8

Frequencies

GnomAD3 genomes

AF:

0.0000328

AC:

AN:

152256

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000327

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

GnomAD3 exomes

AF:

0.000135

AC:

AN:

236554

Hom.:

AF XY:

0.0000847

AC XY:

AN XY:

129924

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000907

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:

0.000171

GnomAD4 exome

AF:

0.0000275

AC:

AN:

1453756

Hom.:

Cov.:

AF XY:

0.0000180

AC XY:

AN XY:

723498

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000896

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:

0.00

GnomAD4 genome

AF:

0.0000328

AC:

AN:

152256

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74392

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000327

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000756

ExAC

AF:

0.000132

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Jul 07, 2017

- -

Spondyloepiphyseal dysplasia with congenital joint dislocations

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 09, 2022

This sequence change replaces serine, which is neutral and polar, with phenylalanine, which is neutral and non-polar, at codon 173 of the CHST3 protein (p.Ser173Phe). This variant is present in population databases (rs751961615, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with CHST3-related conditions. ClinVar contains an entry for this variant (Variation ID: 445944). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The phenylalanine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.32

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.29

Eigen

Benign

-0.22

Eigen_PC

Benign

-0.087

FATHMM_MKL

Benign

0.62

LIST_S2

Benign

0.70

M_CAP

Benign

0.023

MetaRNN

Benign

0.049

MetaSVM

Benign

-0.29

MutationAssessor

Benign

1.2

PrimateAI

Uncertain

0.51

PROVEAN

Benign

-2.0

REVEL

Benign

0.23

Sift

Benign

0.13

Sift4G

Benign

0.17

Polyphen

0.0010

Vest4

0.13

MutPred

0.51

Loss of disorder (P = 0.0076);

MVP

0.86

MPC

0.73

ClinPred

0.045

GERP RS

4.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.17

gMVP

0.65

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