12-68819051-T-C

Position:

• chr12-68819051-T-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_002392.6(MDM2):​c.309-1274T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.338 in 152,086 control chromosomes in the GnomAD database, including 9,486 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.34 (9486 hom., cov: 32)
• Consequence: MDM2 NM_002392.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.301

Genes affected

MDM2 (HGNC:6973): (MDM2 proto-oncogene) This gene encodes a nuclear-localized E3 ubiquitin ligase. The encoded protein can promote tumor formation by targeting tumor suppressor proteins, such as p53, for proteasomal degradation. This gene is itself transcriptionally-regulated by p53. Overexpression or amplification of this locus is detected in a variety of different cancers. There is a pseudogene for this gene on chromosome 2. Alternative splicing results in a multitude of transcript variants, many of which may be expressed only in tumor cells. [provided by RefSeq, Jun 2013]

MDM2 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.42 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MDM2	NM_002392.6	c.309-1274T>C		intron_variant		ENST00000258149.11	NP_002383.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MDM2	ENST00000258149.11	c.309-1274T>C		intron_variant		1	NM_002392.6	ENSP00000258149.6

Frequencies

GnomAD3 genomes AF: 0.338 AC: 51434 AN: 151970 Hom.: 9481 Cov.: 32

Gnomad AFR AF: 0.229

Gnomad AMI AF: 0.521

Gnomad AMR AF: 0.241

Gnomad ASJ AF: 0.263

Gnomad EAS AF: 0.280

Gnomad SAS AF: 0.247

Gnomad FIN AF: 0.443

Gnomad MID AF: 0.253

Gnomad NFE AF: 0.424

Gnomad OTH AF: 0.322

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.338 AC: 51470 AN: 152086 Hom.: 9486 Cov.: 32 AF XY: 0.335 AC XY: 24943 AN XY: 74368

Gnomad4 AFR AF: 0.229

Gnomad4 AMR AF: 0.241

Gnomad4 ASJ AF: 0.263

Gnomad4 EAS AF: 0.280

Gnomad4 SAS AF: 0.245

Gnomad4 FIN AF: 0.443

Gnomad4 NFE AF: 0.424

Gnomad4 OTH AF: 0.323

Alfa AF: 0.377 Hom.: 2841

Bravo AF: 0.320

Asia WGS AF: 0.281 AC: 975 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	13
DANN	Benign	0.61

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.12		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: rs1625525; hg19: chr12-69212831;