15-89776368-C-CGCCTCCTCCGCAGA

Position:

• chr15-89776368-C-CGCCTCCTCCGCAGA

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_001039958.2(MESP2):​c.20_33dup​(p.Gly12ArgfsTer113) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: MESP2 NM_001039958.2 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: -0.754

Genes affected

MESP2 (HGNC:29659): (mesoderm posterior bHLH transcription factor 2) This gene encodes a member of the bHLH family of transcription factors and plays a key role in defining the rostrocaudal patterning of somites via interactions with multiple Notch signaling pathways. This gene is expressed in the anterior presomitic mesoderm and is downregulated immediately after the formation of segmented somites. This gene also plays a role in the formation of epithelial somitic mesoderm and cardiac mesoderm. Mutations in the MESP2 gene cause autosomal recessive spondylocostal dystosis 2 (SCD02). [provided by RefSeq, Oct 2008]

LOC124903550 (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most 50 bp of the penultimate exon, not predicted to undergo nonsense mediated mRNA decay. There are 43 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 15-89776368-C-CGCCTCCTCCGCAGA is Pathogenic according to our data. Variant chr15-89776368-C-CGCCTCCTCCGCAGA is described in ClinVar as [Pathogenic]. Clinvar id is 1453610.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MESP2	NM_001039958.2	c.20_33dup	p.Gly12ArgfsTer113	frameshift_variant	1/2	ENST00000341735.5
LOC124903550	XR_007064751.1	n.241_242insTCTGCGGAGGAGGC		non_coding_transcript_exon_variant	1/2
LOC124903550	XR_007064752.1	n.206_207insTCTGCGGAGGAGGC		non_coding_transcript_exon_variant	1/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MESP2	ENST00000341735.5	c.20_33dup	p.Gly12ArgfsTer113	frameshift_variant	1/2	1	NM_001039958.2	P1
MESP2	ENST00000560219.2	c.31-1688_31-1675dup		intron_variant		1
MESP2	ENST00000558723.1	n.39-1688_39-1675dup		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 21, 2021

This variant has not been reported in the literature in individuals affected with MESP2-related conditions. For these reasons, this variant has been classified as Pathogenic. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Gly12Argfs*113) in the MESP2 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in MESP2 are known to be pathogenic (PMID: 9242490, 18485326). -

Computational scores

Source: dbNSFP v4.3

Splicing

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: chr15-90319599;