X-7253334-C-G

Position:

• chrX-7253334-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001320752.2(STS):​c.135C>G​(p.Ile45Met) variant causes a missense, splice region 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. 14/22 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: STS NM_001320752.2 missense, splice_region
• Scores: Splicing: ADA: 0.0006663
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.466

Genes affected

STS (HGNC:11425): (steroid sulfatase) This gene encodes a multi-pass membrane protein that is localized to the endoplasmic reticulum. It belongs to the sulfatase family and hydrolyzes several 3-beta-hydroxysteroid sulfates, which serve as metabolic precursors for estrogens, androgens, and cholesterol. Mutations in this gene are associated with X-linked ichthyosis (XLI). Alternatively spliced transcript variants resulting from the use of different promoters have been described for this gene (PMID:17601726). [provided by RefSeq, Mar 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.36456496).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
STS	NM_001320752.2	c.135C>G	p.Ile45Met	missense_variant, splice_region_variant	3/11	ENST00000674429.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
STS	ENST00000674429.1	c.135C>G	p.Ile45Met	missense_variant, splice_region_variant	3/11		NM_001320752.2	P1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 23

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 17, 2023

The c.150C>G (p.I50M) alteration is located in exon 2 (coding exon 2) of the STS gene. This alteration results from a C to G substitution at nucleotide position 150, causing the isoleucine (I) at amino acid position 50 to be replaced by a methionine (M). 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	0.097
BayesDel_addAF	Uncertain	0.027	T
BayesDel_noAF	Benign	-0.20
CADD	Benign	21
DANN	Benign	0.32
DEOGEN2	Uncertain	0.74	D
FATHMM_MKL	Benign	0.66	D
LIST_S2	Benign	0.53	T
M_CAP	Pathogenic	0.37	D
MetaRNN	Benign	0.36	T
MetaSVM	Uncertain	0.43	D
MutationAssessor	Benign	1.8	L
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.45	T
PROVEAN	Benign	-0.64	N
REVEL	Uncertain	0.34
Sift	Benign	0.29	T
Sift4G	Benign	0.21	T
Polyphen		0.011	B
Vest4		0.25
MutPred		0.46		Gain of disorder (P = 0.1073);
MVP		0.67
MPC		0.28
ClinPred		0.36	T
GERP RS		2.9
Varity_R		0.44
gMVP		0.63

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.00067
dbscSNV1_RF	Benign	0.10
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: chrX-7171375;