chr20-967216-G-A

Position:

• chr20-967216-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001029871.4(RSPO4):​c.367C>T​(p.Pro123Ser) variant causes a missense change involving the alteration of a 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 Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: RSPO4 NM_001029871.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.82

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 Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.807

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RSPO4	NM_001029871.4	c.367C>T	p.Pro123Ser	missense_variant	3/5	ENST00000217260.9
RSPO4	NM_001040007.3	c.367C>T	p.Pro123Ser	missense_variant	3/4
RSPO4	XM_017027839.2	c.367C>T	p.Pro123Ser	missense_variant	3/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RSPO4	ENST00000217260.9	c.367C>T	p.Pro123Ser	missense_variant	3/5	1	NM_001029871.4	P1
RSPO4	ENST00000400634.2	c.367C>T	p.Pro123Ser	missense_variant	3/4	1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

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

Apr 17, 2024

The c.367C>T (p.P123S) alteration is located in exon 3 (coding exon 3) of the RSPO4 gene. This alteration results from a C to T substitution at nucleotide position 367, causing the proline (P) at amino acid position 123 to be replaced by a serine (S). 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	Pathogenic	0.71
BayesDel_addAF	Uncertain	0.084	D
BayesDel_noAF	Benign	-0.12
CADD	Pathogenic	27
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.77	D;.
Eigen	Uncertain	0.46
Eigen_PC	Uncertain	0.47
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.83	T;D
M_CAP	Uncertain	0.24	D
MetaRNN	Pathogenic	0.81	D;D
MetaSVM	Uncertain	0.52	D
MutationAssessor	Uncertain	2.8	M;M
MutationTaster	Benign	0.97	D;D
PrimateAI	Benign	0.47	T
PROVEAN	Pathogenic	-7.6	D;D
REVEL	Uncertain	0.57
Sift	Uncertain	0.0030	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;P
Vest4		0.65
MutPred		0.53		Loss of glycosylation at P123 (P = 0.0579);Loss of glycosylation at P123 (P = 0.0579);
MVP		0.79
MPC		0.35
ClinPred		1.0	D
GERP RS		4.3
Varity_R		0.63
gMVP		0.63

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: chr20-947859;