17-13601089-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_006042.3(HS3ST3A1):c.41C>T(p.Ala14Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000139 in 1,440,520 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: HS3ST3A1 NM_006042.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.63

Genes affected

HS3ST3A1 (HGNC:5196): (heparan sulfate-glucosamine 3-sulfotransferase 3A1) Heparan sulfate biosynthetic enzymes are key components in generating a myriad of distinct heparan sulfate fine structures that carry out multiple biologic activities. The enzyme encoded by this gene is a member of the heparan sulfate biosynthetic enzyme family. It is a type II integral membrane protein and possesses heparan sulfate glucosaminyl 3-O-sulfotransferase activity. The sulfotransferase domain of this enzyme is highly similar to the same domain of heparan sulfate D-glucosaminyl 3-O-sulfotransferase 3B1, and these two enzymes sulfate an identical disaccharide. This gene is widely expressed, with the most abundant expression in liver and placenta. [provided by RefSeq, Dec 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.17169854).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HS3ST3A1	NM_006042.3	c.41C>T	p.Ala14Val	missense_variant	1/2	ENST00000284110.2
HS3ST3A1	XM_017025480.3	c.41C>T	p.Ala14Val	missense_variant	1/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HS3ST3A1	ENST00000284110.2	c.41C>T	p.Ala14Val	missense_variant	1/2	1	NM_006042.3	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000139 AC: 2 AN: 1440520 Hom.: 0 Cov.: 32 AF XY: 0.00000280 AC XY: 2 AN XY: 715064

Gnomad4 AFR exome AF: 0.0000310

Gnomad4 AMR exome AF: 0.0000235

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 Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 28, 2024

The c.41C>T (p.A14V) alteration is located in exon 1 (coding exon 1) of the HS3ST3A1 gene. This alteration results from a C to T substitution at nucleotide position 41, causing the alanine (A) at amino acid position 14 to be replaced by a valine (V). 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	0.10
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.60
Cadd	Benign	13
Dann	Uncertain	1.0
DEOGEN2	Benign	0.020	T
Eigen	Benign	-0.79
Eigen_PC	Benign	-0.81
FATHMM_MKL	Benign	0.27	N
LIST_S2	Benign	0.55	T
M_CAP	Pathogenic	0.81	D
MetaRNN	Benign	0.17	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.69	N
MutationTaster	Benign	1.0	N
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-0.33	N
REVEL	Benign	0.044
Sift	Benign	0.076	T
Sift4G	Benign	0.33	T
Polyphen		0.063	B
Vest4		0.13
MutPred		0.077		Loss of disorder (P = 0.0817);
MVP		0.014
ClinPred		0.25	T
GERP RS		2.8
Varity_R		0.039
gMVP		0.37

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-13504406;