Genetic Variant NM_001199280.2:c.5C>T (chr16-69109400-C-T) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_001199280.2(HAS3):c.5C>T(p.Pro2Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000138 in 1,448,320 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

HAS3
NM_001199280.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.23

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:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BS2

High AC in GnomAdExome4 at 20 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HAS3	NM_001199280.2 link	c.5C>T	p.Pro2Leu	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.5C>T	p.Pro2Leu	missense_variant	Exon 2 of 4	2	NM_001199280.2	ENSP00000454731.1	O00219-1
HAS3	ENST00000306560.1 link	c.5C>T	p.Pro2Leu	missense_variant	Exon 2 of 4	1		ENSP00000304440.1	O00219-1
HAS3	ENST00000219322.7 link	c.5C>T	p.Pro2Leu	missense_variant	Exon 2 of 4	1		ENSP00000219322.3	O00219-2
HAS3	ENST00000566118.5 link	c.5C>T	p.Pro2Leu	missense_variant	Exon 2 of 4	5		ENSP00000456246.1	H3BRH5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000828

AC:

AN:

241672

Hom.:

AF XY:

0.00000764

AC XY:

AN XY:

130890

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 SAS exome

AF:

0.0000338

Gnomad FIN exome

AF:

0.0000571

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000138

AC:

AN:

1448320

Hom.:

Cov.:

AF XY:

0.0000167

AC XY:

AN XY:

719682

show subpopulations

Gnomad4 AFR exome

AF:

0.0000300

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000253

Gnomad4 SAS exome

AF:

0.0000704

Gnomad4 FIN exome

AF:

0.0000209

Gnomad4 NFE exome

AF:

0.00000903

Gnomad4 OTH exome

AF:

0.0000167

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 25, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.5C>T (p.P2L) alteration is located in exon 2 (coding exon 1) of the HAS3 gene. This alteration results from a C to T substitution at nucleotide position 5, causing the proline (P) at amino acid position 2 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

0.19

BayesDel_addAF

Pathogenic

0.16

BayesDel_noAF

Uncertain

0.0

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.18

T;.;T;T

Eigen

Uncertain

0.44

Eigen_PC

Uncertain

0.50

FATHMM_MKL

Uncertain

0.89

LIST_S2

Uncertain

0.86

.;D;D;D

M_CAP

Uncertain

0.16

MetaRNN

Uncertain

0.49

T;T;T;T

MetaSVM

Benign

-0.59

MutationAssessor

Benign

2.0

M;M;.;M

PrimateAI

Pathogenic

0.84

PROVEAN

Benign

-1.1

N;N;N;N

REVEL

Benign

0.21

Sift

Pathogenic

0.0

D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D

Polyphen

0.98

D;D;.;D

Vest4

0.65

MutPred

0.34

Loss of catalytic residue at P2 (P = 0.0049);Loss of catalytic residue at P2 (P = 0.0049);Loss of catalytic residue at P2 (P = 0.0049);Loss of catalytic residue at P2 (P = 0.0049);

MVP

0.19

MPC

1.6

ClinPred

0.73

GERP RS

5.4

Varity_R

0.49

gMVP

0.86

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