1-158842175-A-G

Position:

• chr1-158842175-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_002432.3(MNDA):​c.22A>G​(p.Ile8Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. I8I) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MNDA NM_002432.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.382

Genes affected

MNDA (HGNC:7183): (myeloid cell nuclear differentiation antigen) The myeloid cell nuclear differentiation antigen (MNDA) is detected only in nuclei of cells of the granulocyte-monocyte lineage. A 200-amino acid region of human MNDA is strikingly similar to a region in the proteins encoded by a family of interferon-inducible mouse genes, designated Ifi-201, Ifi-202, and Ifi-203, that are not regulated in a cell- or tissue-specific fashion. The 1.8-kb MNDA mRNA, which contains an interferon-stimulated response element in the 5-prime untranslated region, was significantly upregulated in human monocytes exposed to interferon alpha. MNDA is located within 2,200 kb of FCER1A, APCS, CRP, and SPTA1. In its pattern of expression and/or regulation, MNDA resembles IFI16, suggesting that these genes participate in blood cell-specific responses to interferons. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MNDA	NM_002432.3	c.22A>G	p.Ile8Val	missense_variant	2/7	ENST00000368141.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MNDA	ENST00000368141.5	c.22A>G	p.Ile8Val	missense_variant	2/7	1	NM_002432.3	P1
MNDA	ENST00000491210.1	n.249A>G		non_coding_transcript_exon_variant	2/2	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 15, 2024

The p.I8V variant (also known as c.22A>G), located in coding exon 1 of the MNDA gene, results from an A to G substitution at nucleotide position 22. The isoleucine at codon 8 is replaced by valine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.22
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	13
DANN	Uncertain	0.99
DEOGEN2	Benign	0.11	T
Eigen	Benign	-0.21
Eigen_PC	Benign	-0.47
FATHMM_MKL	Benign	0.052	N
LIST_S2	Benign	0.77	T
M_CAP	Benign	0.0060	T
MetaRNN	Uncertain	0.50	D
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.4	M
MutationTaster	Benign	1.0	N
PrimateAI	Uncertain	0.49	T
PROVEAN	Benign	-0.90	N
REVEL	Benign	0.14
Sift	Uncertain	0.0060	D
Sift4G	Uncertain	0.012	D
Polyphen		0.99	D
Vest4		0.15
MutPred		0.79		Gain of methylation at K7 (P = 0.0936);
MVP		0.46
MPC		0.026
ClinPred		0.24	T
GERP RS		2.3
Varity_R		0.074
gMVP		0.031

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: chr1-158811965;