rs104893853

Variant names:

• chr4-4862854-C-A
• rs104893853
• NM_002448.3:c.623C>A

Your query was ambiguous. Multiple possible variants found:

• chr4-4862854-C-A
• chr4-4862854-C-G
• chr4-4862854-C-T

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PVS1_Strong PM2 PP5_Moderate

The NM_002448.3(MSX1):​c.623C>A​(p.Ser208*) variant causes a stop gained change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,474 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 (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: MSX1 NM_002448.3 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:3
• Conservation: PhyloP100: 7.77

Genes affected

MSX1 (HGNC:7391): (msh homeobox 1) This gene encodes a member of the muscle segment homeobox gene family. The encoded protein functions as a transcriptional repressor during embryogenesis through interactions with components of the core transcription complex and other homeoproteins. It may also have roles in limb-pattern formation, craniofacial development, particularly odontogenesis, and tumor growth inhibition. Mutations in this gene, which was once known as homeobox 7, have been associated with nonsyndromic cleft lip with or without cleft palate 5, Witkop syndrome, Wolf-Hirschom syndrome, and autosomoal dominant hypodontia. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 8 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 4-4862854-C-A is Pathogenic according to our data. Variant chr4-4862854-C-A is described in ClinVar as [Pathogenic]. Clinvar id is 14882.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr4-4862854-C-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MSX1	NM_002448.3	c.623C>A	p.Ser208*	stop_gained	Exon 2 of 2	ENST00000382723.5	NP_002439.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MSX1	ENST00000382723.5	c.623C>A	p.Ser208*	stop_gained	Exon 2 of 2	1	NM_002448.3	ENSP00000372170.4
MSX1	ENST00000468421.1	n.335C>A		non_coding_transcript_exon_variant	Exon 2 of 2	3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461474 Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1 AN XY: 727072

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.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, single submitter

Submissions by phenotype

Hypoplastic enamel-onycholysis-hypohidrosis syndrome Pathogenic:2

Jul 01, 2001

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Dec 13, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Ser208*) in the MSX1 gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 96 amino acid(s) of the MSX1 protein. This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with tooth agenesis (PMID: 11369996). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 14882). For these reasons, this variant has been classified as Pathogenic. -

MSX1-related disorder Pathogenic:1

Nov 30, 2023

PreventionGenetics, part of Exact Sciences

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

The MSX1 c.623C>A variant is predicted to result in premature protein termination (p.Ser208*). This variant has been reported in individuals with Witkop syndrome (reported as S202X in Jumlongras et al. 2001. PubMed ID: 11369996). This variant has not been reported in a large population database, indicating this variant is rare. Nonsense variants in MSX1 are expected to be pathogenic. This variant is interpreted as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.62	D
BayesDel_noAF	Pathogenic	0.58
CADD	Pathogenic	45
DANN	Uncertain	1.0
Eigen	Pathogenic	0.89
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Pathogenic	0.98	D
Vest4		0.90
GERP RS		4.8

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

LitVar

Other links and lift over

dbSNP: rs104893853; hg19: chr4-4864581;