chrX-38160151-T-A

Position:

• chrX-38160151-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_006307.5(SRPX):​c.821A>T​(p.Lys274Met) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: SRPX NM_006307.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.78

Genes affected

SRPX (HGNC:11309): (sushi repeat containing protein X-linked) Predicted to be an extracellular matrix structural constituent. Predicted to be involved in cell adhesion. Predicted to act upstream of or within several processes, including negative regulation of cell proliferation involved in contact inhibition; phagolysosome assembly; and positive regulation of extrinsic apoptotic signaling pathway in absence of ligand. Part of collagen-containing extracellular matrix. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.877

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SRPX	NM_006307.5	c.821A>T	p.Lys274Met	missense_variant	7/10	ENST00000378533.4	NP_006298.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SRPX	ENST00000378533.4	c.821A>T	p.Lys274Met	missense_variant	7/10	1	NM_006307.5	ENSP00000367794	P2
SRPX	ENST00000544439.5	c.761A>T	p.Lys254Met	missense_variant	6/9	2		ENSP00000440758	A2
SRPX	ENST00000432886.6	c.644A>T	p.Lys215Met	missense_variant	6/9	2		ENSP00000411165
SRPX	ENST00000538295.5	c.821A>T	p.Lys274Met	missense_variant	7/9	2		ENSP00000445034

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

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 03, 2021

The c.821A>T (p.K274M) alteration is located in exon 7 (coding exon 7) of the SRPX gene. This alteration results from a A to T substitution at nucleotide position 821, causing the lysine (K) at amino acid position 274 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	0.22
BayesDel_addAF	Uncertain	0.12	D
BayesDel_noAF	Uncertain	-0.060
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.13	.;.;.;T
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Uncertain	0.94	D;D;D;D
M_CAP	Pathogenic	0.69	D
MetaRNN	Pathogenic	0.88	D;D;D;D
MetaSVM	Uncertain	-0.048	T
MutationAssessor	Benign	1.6	.;.;L;L
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-1.1	N;N;N;N
REVEL	Uncertain	0.36
Sift	Uncertain	0.024	D;D;D;D
Sift4G	Uncertain	0.023	D;D;D;D
Polyphen		1.0	.;.;.;D
Vest4		0.77
MutPred		0.65		.;.;Loss of ubiquitination at K274 (P = 0.0056);Loss of ubiquitination at K274 (P = 0.0056);
MVP		0.98
MPC		0.17
ClinPred		0.92	D
GERP RS		5.7
Varity_R		0.51
gMVP		0.68

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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-38019404;