Genetic Variant NM_175856.5:c.145G>C (chr5-129904974-G-C) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_175856.5(CHSY3):c.145G>C(p.Gly49Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00107 in 1,567,270 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0011 ( 0 hom. )

Consequence

CHSY3
NM_175856.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.618

Publications

2 publications found

Variant links:

Genes affected

CHSY3 (HGNC:24293): (chondroitin sulfate synthase 3) CSS3 is a glycosyltransferase that has both glucuronyltransferase and N-acetylgalactosaminyltransferase activities (Yada et al., 2003 [PubMed 12907687]).[supplied by OMIM, Mar 2008]

CHSY3 links:

ENSG00000251680 (HGNC:58253):

ENSG00000251680 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.021833718).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHSY3	NM_175856.5 link	c.145G>C	p.Gly49Arg	missense_variant	Exon 1 of 3	ENST00000305031.5	NP_787052.3	Q70JA7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHSY3	ENST00000305031.5 link	c.145G>C	p.Gly49Arg	missense_variant	Exon 1 of 3	1	NM_175856.5	ENSP00000302629.4		Q70JA7

Frequencies

GnomAD3 genomes

AF:

0.000664

AC:

101

AN:

152180

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.00135

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000420

AC:

AN:

173696

AF XY:

0.000500

show subpopulations

Gnomad AFR exome

AF:

0.00

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:

0.000969

Gnomad OTH exome

AF:

0.000215

GnomAD4 exome

AF:

0.00112

AC:

1582

AN:

1414982

Hom.:

Cov.:

AF XY:

0.00110

AC XY:

772

AN XY:

701012

show subpopulations

African (AFR)

AF:

0.000186

AC:

AN:

32240

American (AMR)

AF:

0.00

AC:

AN:

41030

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25418

East Asian (EAS)

AF:

0.00

AC:

AN:

37584

South Asian (SAS)

AF:

0.0000123

AC:

AN:

81450

European-Finnish (FIN)

AF:

0.000103

AC:

AN:

38804

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5438

European-Non Finnish (NFE)

AF:

0.00138

AC:

1507

AN:

1094238

Other (OTH)

AF:

0.00109

AC:

AN:

58780

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

111

221

332

442

553

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000663

AC:

101

AN:

152288

Hom.:

Cov.:

AF XY:

0.000577

AC XY:

AN XY:

74464

show subpopulations

African (AFR)

AF:

0.000168

AC:

AN:

41578

American (AMR)

AF:

0.0000653

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5156

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.00135

AC:

AN:

68006

Other (OTH)

AF:

0.000473

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.494

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000903

Hom.:

Bravo

AF:

0.000563

ExAC

AF:

0.000286

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3472

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 05, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.145G>C (p.G49R) alteration is located in exon 1 (coding exon 1) of the CHSY3 gene. This alteration results from a G to C substitution at nucleotide position 145, causing the glycine (G) at amino acid position 49 to be replaced by an arginine (R). 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

0.31

BayesDel_addAF

Benign

-0.53

BayesDel_noAF

Benign

-0.58

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.0098

Eigen

Benign

-0.38

Eigen_PC

Benign

-0.27

FATHMM_MKL

Benign

0.38

LIST_S2

Benign

0.70

M_CAP

Pathogenic

0.42

MetaRNN

Benign

0.022

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.69

PhyloP100

0.62

PrimateAI

Pathogenic

0.94

PROVEAN

Benign

-0.51

REVEL

Benign

0.060

Sift

Uncertain

0.0090

Sift4G

Uncertain

0.016

Polyphen

0.0

Vest4

0.34

MVP

0.55

MPC

2.5

ClinPred

0.21

GERP RS

3.0

Varity_R

0.076

gMVP

0.66

Mutation Taster

=83/17

polymorphism

(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.

NM_175856.5:c.145G>C

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