12-68809191-C-CT

Position:

• chr12-68809191-C-CT

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP6_Moderate

The NM_002392.6(MDM2):​c.15-9dup variant causes a splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000144 in 1,455,700 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.000014 (0 hom.)
• Consequence: MDM2 NM_002392.6 splice_polypyrimidine_tract, intron
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.265

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP6: Variant 12-68809191-C-CT is Benign according to our data. Variant chr12-68809191-C-CT is described in ClinVar as [Benign]. Clinvar id is 1644981.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MDM2	NM_002392.6	c.15-9dup		splice_polypyrimidine_tract_variant, intron_variant		ENST00000258149.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MDM2	ENST00000258149.11	c.15-9dup		splice_polypyrimidine_tract_variant, intron_variant		1	NM_002392.6

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.0000144 AC: 21 AN: 1455700 Hom.: 0 Cov.: 31 AF XY: 0.0000138 AC XY: 10 AN XY: 724004

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000462

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000118

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000144

Gnomad4 OTH exome AF: 0.0000332

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Accelerated tumor formation, susceptibility to Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Oct 04, 2022

- -

Computational scores

Source: dbNSFP v4.3

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: rs555886264; hg19: chr12-69202971;