17-14301778-G-C

Position:

• chr17-14301778-G-C

Variant summary

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

The NM_006041.3(HS3ST3B1):​c.260G>C​(p.Arg87Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/20 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)
• Consequence: HS3ST3B1 NM_006041.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.921

Genes affected

HS3ST3B1 (HGNC:5198): (heparan sulfate-glucosamine 3-sulfotransferase 3B1) The protein encoded by this gene is a type II integral membrane protein that belongs to the 3-O-sulfotransferases family. These proteins catalyze the addition of sulfate groups at the 3-OH position of glucosamine in heparan sulfate. The substrate specificity of individual members of the family is based on prior modification of the heparan sulfate chain, thus allowing different members of the family to generate binding sites for different proteins on the same heparan sulfate chain. Following treatment with a histone deacetylase inhibitor, expression of this gene is activated in a pancreatic cell line. The increased expression results in promotion of the epithelial-mesenchymal transition. In addition, the modification catalyzed by this protein allows herpes simplex virus membrane fusion and penetration. A very closely related homolog with an almost identical sulfotransferase domain maps less than 1 Mb away. Alternative splicing results in multiple transcript variants. [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=0.13011765).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HS3ST3B1	NM_006041.3	c.260G>C	p.Arg87Thr	missense_variant	1/2	ENST00000360954.3
HS3ST3B1	NR_130138.2	n.698G>C		non_coding_transcript_exon_variant	1/3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HS3ST3B1	ENST00000360954.3	c.260G>C	p.Arg87Thr	missense_variant	1/2	1	NM_006041.3	P1
HS3ST3B1	ENST00000466596.5	c.260G>C	p.Arg87Thr	missense_variant, NMD_transcript_variant	1/3	2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

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

Dec 19, 2023

The c.260G>C (p.R87T) alteration is located in exon 1 (coding exon 1) of the HS3ST3B1 gene. This alteration results from a G to C substitution at nucleotide position 260, causing the arginine (R) at amino acid position 87 to be replaced by a threonine (T). 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	0.089
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.57
CADD	Benign	16
DANN	Benign	0.72
DEOGEN2	Benign	0.010	T
Eigen	Benign	-0.61
Eigen_PC	Benign	-0.55
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.49	T
M_CAP	Uncertain	0.15	D
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.1	L
MutationTaster	Benign	1.0	N
PrimateAI	Pathogenic	0.79	T
PROVEAN	Benign	-0.88	N
REVEL	Benign	0.072
Sift	Benign	0.22	T
Sift4G	Benign	0.26	T
Polyphen		0.079	B
Vest4		0.098
MutPred		0.23		Gain of glycosylation at R87 (P = 4e-04);
MVP		0.39
ClinPred		0.097	T
GERP RS		2.2
Varity_R		0.040
gMVP		0.56

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

Other links and lift over

dbSNP: rs548961010; hg19: chr17-14205095;