chr20-967282-G-A

Position:

• chr20-967282-G-A

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_001029871.4(RSPO4):​c.301C>T​(p.Gln101Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. 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 Pathogenic (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 33)
• Consequence: RSPO4 NM_001029871.4 stop_gained
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 1.80

Genes affected

RSPO4 (HGNC:16175): (R-spondin 4) This gene encodes a member of the R-spondin family of proteins that share a common domain organization consisting of a signal peptide, cysteine-rich/furin-like domain, thrombospondin domain and a C-terminal basic region. The encoded protein may be involved in activation of Wnt/beta-catenin signaling pathways. Mutations in this gene are associated with anonychia congenital. Alternate splicing results in multiple transcript variants.[provided by RefSeq, Sep 2009]

ACMG classification

Verdict is Pathogenic. Variant got 11 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 20-967282-G-A is Pathogenic according to our data. Variant chr20-967282-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 30845.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RSPO4	NM_001029871.4	c.301C>T	p.Gln101Ter	stop_gained	3/5	ENST00000217260.9
RSPO4	NM_001040007.3	c.301C>T	p.Gln101Ter	stop_gained	3/4
RSPO4	XM_017027839.2	c.301C>T	p.Gln101Ter	stop_gained	3/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RSPO4	ENST00000217260.9	c.301C>T	p.Gln101Ter	stop_gained	3/5	1	NM_001029871.4	P1
RSPO4	ENST00000400634.2	c.301C>T	p.Gln101Ter	stop_gained	3/4	1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

Alfa AF: 0.00209 Hom.: 0

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Anonychia Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Apr 01, 2008

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.62	D
BayesDel_noAF	Pathogenic	0.57
CADD	Pathogenic	42
DANN	Uncertain	0.99
Eigen	Uncertain	0.38
Eigen_PC	Benign	0.21
FATHMM_MKL	Uncertain	0.87	D
MutationTaster	Benign	1.0	A;A
Vest4		0.16
GERP RS		4.4

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.090		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: rs387907026; hg19: chr20-947925;