NM_003620.4:c.456C>G

Variant names:

• chr17-60600870-C-G
• NM_003620.4:c.456C>G
• PPM1D p.Ala152Ala

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_003620.4(PPM1D):​c.456C>G​(p.Ala152Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. A152A) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: PPM1D NM_003620.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.663
• Publications: 0 publications found

Genes affected

PPM1D (HGNC:9277): (protein phosphatase, Mg2+/Mn2+ dependent 1D) The protein encoded by this gene is a member of the PP2C family of Ser/Thr protein phosphatases. PP2C family members are known to be negative regulators of cell stress response pathways. The expression of this gene is induced in a p53-dependent manner in response to various environmental stresses. While being induced by tumor suppressor protein TP53/p53, this phosphatase negatively regulates the activity of p38 MAP kinase, MAPK/p38, through which it reduces the phosphorylation of p53, and in turn suppresses p53-mediated transcription and apoptosis. This phosphatase thus mediates a feedback regulation of p38-p53 signaling that contributes to growth inhibition and the suppression of stress induced apoptosis. This gene is located in a chromosomal region known to be amplified in breast cancer. The amplification of this gene has been detected in both breast cancer cell line and primary breast tumors, which suggests a role of this gene in cancer development. [provided by RefSeq, Jul 2008]

PPM1D Gene-Disease associations (from GenCC):

• intellectual developmental disorder with gastrointestinal difficulties and high pain threshold

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• syndromic intellectual disability

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• hereditary breast carcinoma

  Inheritance: AD, Unknown Classification: NO_KNOWN Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.52).
• BP7: Synonymous conserved (PhyloP=0.663 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003620.4. 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
	PPM1D	NM_003620.4	MANE Select	c.456C>G	p.Ala152Ala	synonymous	Exon 1 of 6	NP_003611.1	A0A0S2Z4M2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PPM1D	ENST00000305921.8	TSL:1 MANE Select	c.456C>G	p.Ala152Ala	synonymous	Exon 1 of 6	ENSP00000306682.2	O15297-1
	PPM1D	ENST00000870218.1		c.456C>G	p.Ala152Ala	synonymous	Exon 1 of 6	ENSP00000540277.1
	PPM1D	ENST00000870219.1		c.456C>G	p.Ala152Ala	synonymous	Exon 1 of 4	ENSP00000540278.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.52
CADD	Benign	13
DANN	Benign	0.83
PhyloP100		0.66
PromoterAI		0.043	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr17-58678231;