chr19-10223888-T-A

Position:

• chr19-10223888-T-A

Variant summary

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

The NM_004230.4(S1PR2):​c.1018A>T​(p.Met340Leu) 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. 14/19 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: S1PR2 NM_004230.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.96

Genes affected

S1PR2 (HGNC:3169): (sphingosine-1-phosphate receptor 2) This gene encodes a member of the G protein-coupled receptors, as well as the EDG family of proteins. The encoded protein is a receptor for sphingosine 1-phosphate, which participates in cell proliferation, survival, and transcriptional activation. Defects in this gene have been associated with congenital profound deafness. [provided by RefSeq, Mar 2016]

DNMT1 (HGNC:2976): (DNA methyltransferase 1) This gene encodes an enzyme that transfers methyl groups to cytosine nucleotides of genomic DNA. This protein is the major enzyme responsible for maintaining methylation patterns following DNA replication and shows a preference for hemi-methylated DNA. Methylation of DNA is an important component of mammalian epigenetic gene regulation. Aberrant methylation patterns are found in human tumors and associated with developmental abnormalities. Variation in this gene has been associated with cerebellar ataxia, deafness, and narcolepsy, and neuropathy, hereditary sensory, type IE. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

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=0.07405716).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
S1PR2	NM_004230.4	c.1018A>T	p.Met340Leu	missense_variant	2/2	ENST00000646641.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
S1PR2	ENST00000646641.1	c.1018A>T	p.Met340Leu	missense_variant	2/2		NM_004230.4	P1
DNMT1	ENST00000588952.5	c.-401-5019A>T		intron_variant		5
DNMT1	ENST00000592342.5	c.-284+7316A>T		intron_variant		3

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

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 17, 2023

The c.1018A>T (p.M340L) alteration is located in exon 2 (coding exon 1) of the S1PR2 gene. This alteration results from a A to T substitution at nucleotide position 1018, causing the methionine (M) at amino acid position 340 to be replaced by a leucine (L). 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	0.083
BayesDel_addAF	Benign	-0.079	T
BayesDel_noAF	Benign	-0.35
CADD	Benign	9.5
DANN	Benign	0.67
DEOGEN2	Benign	0.078	T;T
Eigen	Benign	-0.73
Eigen_PC	Benign	-0.58
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Benign	0.52	.;T
M_CAP	Benign	0.0083	T
MetaRNN	Benign	0.074	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.2	L;L
MutationTaster	Benign	0.90	N
PrimateAI	Benign	0.47	T
Sift4G	Benign	1.0	T;.
Polyphen		0.0	B;B
Vest4		0.27
MutPred		0.20		Loss of phosphorylation at T345 (P = 0.0957);Loss of phosphorylation at T345 (P = 0.0957);
MVP		0.62
MPC		0.52
ClinPred		0.074	T
GERP RS		1.7
Varity_R		0.15
gMVP		0.34

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: chr19-10334564;