1-204544563-C-T

Variant summary

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

The NM_002393.5(MDM4):c.701C>T(p.Thr234Ile) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: MDM4 NM_002393.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.83

Genes affected

MDM4 (HGNC:6974): (MDM4 regulator of p53) This gene encodes a nuclear protein that contains a p53 binding domain at the N-terminus and a RING finger domain at the C-terminus, and shows structural similarity to p53-binding protein MDM2. Both proteins bind the p53 tumor suppressor protein and inhibit its activity, and have been shown to be overexpressed in a variety of human cancers. However, unlike MDM2 which degrades p53, this protein inhibits p53 by binding its transcriptional activation domain. This protein also interacts with MDM2 protein via the RING finger domain, and inhibits the latter's degradation. So this protein can reverse MDM2-targeted degradation of p53, while maintaining suppression of p53 transactivation and apoptotic functions. Alternatively spliced transcript variants encoding different isoforms have been noted for this gene. [provided by RefSeq, Feb 2011]

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
MDM4	NM_002393.5	c.701C>T	p.Thr234Ile	missense_variant	9/11	ENST00000367182.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MDM4	ENST00000367182.8	c.701C>T	p.Thr234Ile	missense_variant	9/11	1	NM_002393.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

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

Jul 16, 2021

The c.701C>T (p.T234I) alteration is located in exon 9 (coding exon 8) of the MDM4 gene. This alteration results from a C to T substitution at nucleotide position 701, causing the threonine (T) at amino acid position 234 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.59
BayesDel_addAF	Uncertain	0.077	D
BayesDel_noAF	Benign	-0.13
Cadd	Uncertain	25
Dann	Uncertain	1.0
DEOGEN2	Benign	0.37	T;D;T
Eigen	Pathogenic	0.75
Eigen_PC	Pathogenic	0.76
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Uncertain	0.92	D;D;D
M_CAP	Benign	0.013	T
MetaRNN	Uncertain	0.54	D;D;D
MetaSVM	Benign	-1.2	T
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Uncertain	0.67	T
Sift4G	Uncertain	0.0040	D;T;D
Polyphen		1.0	.;D;.
Vest4		0.77
MutPred		0.32		.;Loss of catalytic residue at T234 (P = 0.1084);.;
MVP		0.46
MPC		0.59
ClinPred		0.98	D
GERP RS		5.6
Varity_R		0.32
gMVP		0.49

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: chr1-204513691; COSMIC: COSV65795020; COSMIC: COSV65795020;