chr5-174724726-G-C

Variant names:

• chr5-174724726-G-C
• rs757530512
• NM_002449.5:c.67G>C

Variant summary

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

The NM_002449.5(MSX2):​c.67G>C​(p.Gly23Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000139 in 1,438,140 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: MSX2 NM_002449.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.11
• Publications: 0 publications found

Genes affected

MSX2 (HGNC:7392): (msh homeobox 2) This gene encodes a member of the muscle segment homeobox gene family. The encoded protein is a transcriptional repressor whose normal activity may establish a balance between survival and apoptosis of neural crest-derived cells required for proper craniofacial morphogenesis. The encoded protein may also have a role in promoting cell growth under certain conditions and may be an important target for the RAS signaling pathways. Mutations in this gene are associated with parietal foramina 1 and craniosynostosis type 2. [provided by RefSeq, Jul 2008]

MSX2 Gene-Disease associations (from GenCC):

• craniosynostosis 2

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen, Orphanet
• parietal foramina

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• parietal foramina with cleidocranial dysplasia

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE, LIMITED Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P
• parietal foramina 1

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002449.5. 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
	MSX2	NM_002449.5	MANE Select	c.67G>C	p.Gly23Arg	missense	Exon 1 of 2	NP_002440.2
	MSX2	NM_001363626.2		c.67G>C	p.Gly23Arg	missense	Exon 1 of 2	NP_001350555.1	D6RIS4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MSX2	ENST00000239243.7	TSL:1 MANE Select	c.67G>C	p.Gly23Arg	missense	Exon 1 of 2	ENSP00000239243.5	P35548
	MSX2	ENST00000507785.2	TSL:2	c.67G>C	p.Gly23Arg	missense	Exon 1 of 2	ENSP00000427425.1	D6RIS4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000139 AC: 2 AN: 1438140 Hom.: 0 Cov.: 36 AF XY: 0.00000280 AC XY: 2 AN XY: 713214

African (AFR) AF: 0.00 AC: 0 AN: 33052

American (AMR) AF: 0.00 AC: 0 AN: 41466

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25690

East Asian (EAS) AF: 0.00 AC: 0 AN: 38710

South Asian (SAS) AF: 0.0000240 AC: 2 AN: 83240

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50462

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4844

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1101232

Other (OTH) AF: 0.00 AC: 0 AN: 59444

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.24
BayesDel_addAF	Uncertain	0.062	T
BayesDel_noAF	Benign	-0.15
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.30	T
Eigen	Benign	-0.50
Eigen_PC	Benign	-0.40
FATHMM_MKL	Uncertain	0.79	D
LIST_S2	Benign	0.81	T
M_CAP	Pathogenic	0.40	D
MetaRNN	Uncertain	0.52	D
MetaSVM	Uncertain	-0.26	T
MutationAssessor	Benign	1.0	L
PhyloP100		1.1
PrimateAI	Uncertain	0.76	T
PROVEAN	Benign	-0.76	N
REVEL	Uncertain	0.40
Sift	Uncertain	0.019	D
Sift4G	Benign	0.29	T
Polyphen		0.078	B
Vest4		0.54
MutPred		0.26		Gain of methylation at G23 (P = 0.0321)
MVP		0.96
MPC		0.48
ClinPred		0.21	T
GERP RS		3.5
PromoterAI		-0.016	Neutral
Varity_R		0.16
gMVP		0.51
Mutation Taster		=92/8	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: rs757530512; hg19: chr5-174151729;