chr15-38299530-C-T

Position:

• chr15-38299530-C-T

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The ENST00000299084.9(SPRED1):​c.190C>T​(p.Arg64Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,620 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 Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SPRED1 ENST00000299084.9 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:4
• Conservation: PhyloP100: 3.49

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 Pathogenic. Variant got 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 15-38299530-C-T is Pathogenic according to our data. Variant chr15-38299530-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 1813.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr15-38299530-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SPRED1	NM_152594.3	c.190C>T	p.Arg64Ter	stop_gained	2/7	ENST00000299084.9	NP_689807.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SPRED1	ENST00000299084.9	c.190C>T	p.Arg64Ter	stop_gained	2/7	1	NM_152594.3	ENSP00000299084	P1
SPRED1	ENST00000561317.1	c.127C>T	p.Arg43Ter	stop_gained	3/6	4		ENSP00000453680
SPRED1	ENST00000561205.1	n.528C>T		non_coding_transcript_exon_variant	2/5	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461620 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727112

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Legius syndrome Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Aug 11, 2023	This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individuals with Legius syndrome (PMID: 19366998). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 1813). For these reasons, this variant has been classified as Pathogenic. This sequence change creates a premature translational stop signal (p.Arg64*) in the SPRED1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in SPRED1 are known to be pathogenic (PMID: 17704776). -
Pathogenic, no assertion criteria provided	literature only	OMIM	Jul 01, 2009	- -
Pathogenic, criteria provided, single submitter	clinical testing	Center for Human Genetics, Inc, Center for Human Genetics, Inc	Nov 01, 2016	- -

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Aug 08, 2023

Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss of function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 17704776, 21089071, 19366998, 27322474, 32005694) -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.60
CADD	Pathogenic	39
DANN	Uncertain	1.0
Eigen	Pathogenic	0.75
Eigen_PC	Uncertain	0.62
FATHMM_MKL	Pathogenic	0.97	D
MutationTaster	Benign	1.0	A
Vest4		0.85
GERP RS		4.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs121434315; hg19: chr15-38591731; COSMIC: COSV54435140;