17-4530701-C-G

Variant summary

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

The NM_001124758.3(SPNS2):c.643C>G(p.Pro215Ala) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,461,768 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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: SPNS2 NM_001124758.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.03

Genes affected

SPNS2 (HGNC:26992): (SPNS lysolipid transporter 2, sphingosine-1-phosphate) The protein encoded by this gene is a transporter of sphingosine 1-phosphate, a secreted lipid that is important in cardiovascular, immunological, and neural development. Defects in this gene are a cause of early onset progressive hearing loss. [provided by RefSeq, Jul 2016]

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, 0.844

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SPNS2	NM_001124758.3	c.643C>G	p.Pro215Ala	missense_variant	4/13	ENST00000329078.8
SPNS2	XM_047435339.1	c.190C>G	p.Pro64Ala	missense_variant	4/13
SPNS2	XR_007065260.1	n.810C>G		non_coding_transcript_exon_variant	4/13
SPNS2	XR_007065261.1	n.480C>G		non_coding_transcript_exon_variant	2/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SPNS2	ENST00000329078.8	c.643C>G	p.Pro215Ala	missense_variant	4/13	1	NM_001124758.3	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.0000120 AC: 3 AN: 249166 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135296

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: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000177

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461768 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727182

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ExAC AF: 0.0000165 AC: 2

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hearing impairment Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Department of Otolaryngology – Head & Neck Surgery, Cochlear Implant Center

Apr 12, 2021

PM2_Moderate, PP3_Supporting -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.83
BayesDel_addAF	Benign	-0.057	T
BayesDel_noAF	Benign	-0.22
Cadd	Pathogenic	27
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.53	D
Eigen	Uncertain	0.56
Eigen_PC	Uncertain	0.51
FATHMM_MKL	Uncertain	0.84	D
LIST_S2	Pathogenic	1.0	D
M_CAP	Benign	0.037	D
MetaRNN	Pathogenic	0.84	D
MetaSVM	Benign	-0.51	T
MutationAssessor	Uncertain	2.2	M
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.76	T
PROVEAN	Pathogenic	-6.6	D
REVEL	Benign	0.29
Sift	Benign	0.065	T
Sift4G	Uncertain	0.029	D
Polyphen		0.99	D
Vest4		0.82
MutPred		0.53		Loss of glycosylation at T212 (P = 0.0878);
MVP		0.62
MPC		1.6
ClinPred		0.96	D
GERP RS		3.9
Varity_R		0.62

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: rs778581497; hg19: chr17-4433996;