Genetic Variant HAS3:p.Ser166Arg (chr16-69109893-C-G) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_001199280.2(HAS3):c.498C>G(p.Ser166Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000372 in 1,613,862 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

HAS3
NM_001199280.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.158

Variant links:

Genes affected

HAS3 (HGNC:4820): (hyaluronan synthase 3) The protein encoded by this gene is involved in the synthesis of the unbranched glycosaminoglycan hyaluronan, or hyaluronic acid, which is a major constituent of the extracellular matrix. This gene is a member of the NODC/HAS gene family. Compared to the proteins encoded by other members of this gene family, this protein appears to be more of a regulator of hyaluronan synthesis. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2010]

HAS3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.10379967).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HAS3	NM_001199280.2 link	c.498C>G	p.Ser166Arg	missense_variant	Exon 2 of 4	ENST00000569188.6	NP_001186209.1	O00219-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
HAS3	ENST00000569188.6 link	c.498C>G	p.Ser166Arg	missense_variant	Exon 2 of 4	2	NM_001199280.2	ENSP00000454731.1	O00219-1
HAS3	ENST00000306560.1 link	c.498C>G	p.Ser166Arg	missense_variant	Exon 2 of 4	1		ENSP00000304440.1	O00219-1
HAS3	ENST00000219322.7 link	c.498C>G	p.Ser166Arg	missense_variant	Exon 2 of 4	1		ENSP00000219322.3	O00219-2
HAS3	ENST00000566118.5 link	c.498C>G	p.Ser166Arg	missense_variant	Exon 2 of 4	5		ENSP00000456246.1	H3BRH5

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152242

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1461620

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727154

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

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:

0.00000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152242

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74372

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.0000441

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000113

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 01, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.498C>G (p.S166R) alteration is located in exon 2 (coding exon 1) of the HAS3 gene. This alteration results from a C to G substitution at nucleotide position 498, causing the serine (S) at amino acid position 166 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

0.23

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.47

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.12

T;.;T;T

Eigen

Benign

-0.51

Eigen_PC

Benign

-0.40

FATHMM_MKL

Benign

0.21

LIST_S2

Uncertain

0.89

.;D;D;D

M_CAP

Benign

0.026

MetaRNN

Benign

0.10

T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.0

L;L;.;L

PrimateAI

Uncertain

0.67

PROVEAN

Benign

-1.1

N;N;N;N

REVEL

Benign

0.097

Sift

Benign

0.32

T;T;T;T

Sift4G

Benign

0.38

T;T;T;T

Polyphen

0.044

B;B;.;B

Vest4

0.45

MutPred

0.37

Gain of MoRF binding (P = 0.0696);Gain of MoRF binding (P = 0.0696);Gain of MoRF binding (P = 0.0696);Gain of MoRF binding (P = 0.0696);

MVP

0.095

MPC

1.0

ClinPred

0.26

GERP RS

3.6

Varity_R

0.23

gMVP

0.61

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