chr15-38299455-C-G

Position:

• chr15-38299455-C-G

Variant summary

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

The NM_152594.3(SPRED1):​c.115C>G​(p.Leu39Val) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SPRED1 NM_152594.3 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 6.00

Genes affected

SPRED1 (HGNC:20249): (sprouty related EVH1 domain containing 1) The protein encoded by this gene is a member of the Sprouty family of proteins and is phosphorylated by tyrosine kinase in response to several growth factors. The encoded protein can act as a homodimer or as a heterodimer with SPRED2 to regulate activation of the MAP kinase cascade. Defects in this gene are a cause of neurofibromatosis type 1-like syndrome (NFLS). [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SPRED1	NM_152594.3	c.115C>G	p.Leu39Val	missense_variant	2/7	ENST00000299084.9	NP_689807.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SPRED1	ENST00000299084.9	c.115C>G	p.Leu39Val	missense_variant	2/7	1	NM_152594.3	ENSP00000299084	P1
SPRED1	ENST00000561317.1	c.52C>G	p.Leu18Val	missense_variant	3/6	4		ENSP00000453680
SPRED1	ENST00000561205.1	n.453C>G		non_coding_transcript_exon_variant	2/5	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Legius syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 09, 2022

This sequence change replaces leucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 39 of the SPRED1 protein (p.Leu39Val). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 468789). This variant has not been reported in the literature in individuals affected with SPRED1-related conditions. This variant is not present in population databases (gnomAD no frequency). -

Cardiovascular phenotype Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 12, 2023

The p.L39V variant (also known as c.115C>G), located in coding exon 2 of the SPRED1 gene, results from a C to G substitution at nucleotide position 115. The leucine at codon 39 is replaced by valine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.65
BayesDel_addAF	Pathogenic	0.37	D
BayesDel_noAF	Pathogenic	0.29
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.75	D;T
Eigen	Uncertain	0.62
Eigen_PC	Uncertain	0.66
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.96	D;D
M_CAP	Uncertain	0.23	D
MetaRNN	Uncertain	0.69	D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Uncertain	2.4	M;.
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	-1.8	N;N
REVEL	Pathogenic	0.71
Sift	Uncertain	0.0050	D;D
Sift4G	Uncertain	0.0060	D;D
Polyphen		0.84	P;.
Vest4		0.80
MutPred		0.46		Loss of sheet (P = 0.1158);.;
MVP		0.90
MPC		1.1
ClinPred		0.85	D
GERP RS		5.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.79
gMVP		0.64

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: rs1555389691; hg19: chr15-38591656;