Genetic Variant NM_014918.5:c.2395G>A (chr15-101177402-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_014918.5(CHSY1):c.2395G>A(p.Val799Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,460,320 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V799L) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

CHSY1
NM_014918.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.800

Publications

0 publications found

Variant links:

Genes affected

CHSY1 (HGNC:17198): (chondroitin sulfate synthase 1) This gene encodes a member of the chondroitin N-acetylgalactosaminyltransferase family. These enzymes possess dual glucuronyltransferase and galactosaminyltransferase activity and play critical roles in the biosynthesis of chondroitin sulfate, a glycosaminoglycan involved in many biological processes including cell proliferation and morphogenesis. Decreased expression of this gene may play a role in colorectal cancer, and mutations in this gene are a cause of temtamy preaxial brachydactyly syndrome. [provided by RefSeq, Dec 2011]

CHSY1 Gene-Disease associations (from GenCC):

temtamy preaxial brachydactyly syndrome
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Orphanet

CHSY1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.027715951).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHSY1	NM_014918.5 link	c.2395G>A	p.Val799Met	missense_variant	Exon 3 of 3	ENST00000254190.4	NP_055733.2	Q86X52

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CHSY1	ENST00000254190.4 link	c.2395G>A	p.Val799Met	missense_variant	Exon 3 of 3	1	NM_014918.5	ENSP00000254190.3	Q86X52
CHSY1	ENST00000543813.2 link	n.*1710G>A		non_coding_transcript_exon_variant	Exon 3 of 3	2		ENSP00000496160.1	A0A2R8Y7B7
CHSY1	ENST00000543813.2 link	n.*1710G>A		3_prime_UTR_variant	Exon 3 of 3	2		ENSP00000496160.1	A0A2R8Y7B7

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1460320

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726336

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33382

American (AMR)

AF:

0.00

AC:

AN:

44368

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26076

East Asian (EAS)

AF:

0.00

AC:

AN:

39690

South Asian (SAS)

AF:

0.00

AC:

AN:

85714

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5754

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111606

Other (OTH)

AF:

0.00

AC:

AN:

60316

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.071

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.66

CADD

Benign

8.2

(source)

DANN

Benign

0.84

DEOGEN2

Benign

0.0064

Eigen

Benign

-1.0

Eigen_PC

Benign

-0.93

FATHMM_MKL

Benign

0.37

LIST_S2

Benign

0.75

M_CAP

Benign

0.0048

MetaRNN

Benign

0.028

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.0

PhyloP100

0.80

PrimateAI

Benign

0.30

PROVEAN

Benign

-0.39

REVEL

Benign

0.019

Sift

Benign

0.16

Sift4G

Benign

0.26

Polyphen

0.0010

Vest4

0.10

MutPred

0.10

Gain of solvent accessibility (P = 0.0837);

MVP

0.19

MPC

0.32

ClinPred

0.21

GERP RS

-0.91

Varity_R

0.033

gMVP

0.25

Mutation Taster

=85/15

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

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NM_014918.5:c.2395G>A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over