15-89776400-C-A

Variant names:

• chr15-89776400-C-A
• rs985850317
• NM_001039958.2:c.43C>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001039958.2(MESP2):​c.43C>A​(p.His15Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000724 in 1,380,352 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. H15D) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: MESP2 NM_001039958.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.595
• Publications: 0 publications found

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]

MESP2 Gene-Disease associations (from GenCC):

• spondylocostal dysostosis 2, autosomal recessive

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• autosomal recessive spondylocostal dysostosis

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

LOC124903550 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.18670377).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001039958.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MESP2	NM_001039958.2	MANE Select	c.43C>A	p.His15Asn	missense	Exon 1 of 2	NP_001035047.1	Q0VG99

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MESP2	ENST00000341735.5	TSL:1 MANE Select	c.43C>A	p.His15Asn	missense	Exon 1 of 2	ENSP00000342392.3	Q0VG99
	MESP2	ENST00000560219.2	TSL:1	c.31-1665C>A		intron	N/A	ENSP00000452998.1	H0YKZ5
	MESP2	ENST00000558723.1	TSL:3	n.39-1665C>A		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.24e-7 AC: 1 AN: 1380352 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 681280

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 31078

American (AMR) AF: 0.00 AC: 0 AN: 35598

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25098

East Asian (EAS) AF: 0.00 AC: 0 AN: 35452

South Asian (SAS) AF: 0.0000127 AC: 1 AN: 78694

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 34864

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4074

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1077874

Other (OTH) AF: 0.00 AC: 0 AN: 57620

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.49
CADD	Benign	15
DANN	Benign	0.85
DEOGEN2	Benign	0.17	T
Eigen	Benign	-0.57
Eigen_PC	Benign	-0.57
FATHMM_MKL	Benign	0.32	N
LIST_S2	Benign	0.45	T
M_CAP	Uncertain	0.13	D
MetaRNN	Benign	0.19	T
MetaSVM	Benign	-0.76	T
MutationAssessor	Benign	0.69	N
PhyloP100		0.59
PrimateAI	Uncertain	0.53	T
PROVEAN	Benign	-0.72	N
REVEL	Benign	0.15
Sift	Benign	0.28	T
Sift4G	Benign	0.14	T
Polyphen		0.28	B
Vest4		0.20
MutPred		0.39		Gain of loop (P = 0.069)
MVP		0.76
MPC		0.78
ClinPred		0.12	T
GERP RS		3.2
PromoterAI		0.12	Neutral
Varity_R		0.077
gMVP		0.26
Mutation Taster		=96/4	polymorphism

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

Other links and lift over

dbSNP: rs985850317; hg19: chr15-90319631;