NM_006242.4:c.679G>C

Variant names:

• chr20-59939253-C-G
• rs374884643
• NM_006242.4:c.679G>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_006242.4(PPP1R3D):​c.679G>C​(p.Ala227Pro) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,459,466 control chromosomes in the GnomAD database, with no homozygous occurrence. 13/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A227T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: PPP1R3D NM_006242.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.58
• Publications: 0 publications found

Genes affected

PPP1R3D (HGNC:9294): (protein phosphatase 1 regulatory subunit 3D) Phosphorylation of serine and threonine residues in proteins is a crucial step in the regulation of many cellular functions ranging from hormonal regulation to cell division and even short-term memory. The level of phosphorylation is controlled by the opposing actions of protein kinases and protein phosphatases. Protein phosphatase 1 (PP1) is 1 of 4 major serine/threonine-specific protein phosphatases which have been identified in eukaryotic cells. PP1 associates with various regulatory subunits that dictate its subcellular localization and modulate its substrate specificity. Several subunits that target PP1 to glycogen have been identified. This gene encodes a glycogen-targeting subunit of PP1. [provided by RefSeq, Jul 2008]

FAM217B (HGNC:16170): (family with sequence similarity 217 member B) Located in cytosol and nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006242.4. 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
	PPP1R3D	NM_006242.4	MANE Select	c.679G>C	p.Ala227Pro	missense	Exon 1 of 1	NP_006233.1	O95685
	FAM217B	NM_001190826.2		c.-203+1141C>G		intron	N/A	NP_001177755.1	Q9NTX9

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PPP1R3D	ENST00000370996.5	TSL:6 MANE Select	c.679G>C	p.Ala227Pro	missense	Exon 1 of 1	ENSP00000360035.3	O95685
	FAM217B	ENST00000358293.7	TSL:2	c.-203+1141C>G		intron	N/A	ENSP00000351040.3	Q9NTX9
	FAM217B	ENST00000890684.1		c.-203+1141C>G		intron	N/A	ENSP00000560743.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1459466 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 725914

African (AFR) AF: 0.00 AC: 0 AN: 33434

American (AMR) AF: 0.00 AC: 0 AN: 44640

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26048

East Asian (EAS) AF: 0.00 AC: 0 AN: 39654

South Asian (SAS) AF: 0.00 AC: 0 AN: 86142

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52264

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111210

Other (OTH) AF: 0.00 AC: 0 AN: 60310

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.24
BayesDel_addAF	Benign	-0.022	T
BayesDel_noAF	Benign	-0.27
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.062	T
Eigen	Benign	0.15
Eigen_PC	Benign	0.020
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.56	T
M_CAP	Benign	0.061	D
MetaRNN	Uncertain	0.48	T
MetaSVM	Benign	-0.81	T
MutationAssessor	Benign	1.7	L
PhyloP100		5.6
PrimateAI	Uncertain	0.59	T
PROVEAN	Benign	-1.3	N
REVEL	Benign	0.26
Sift	Benign	0.045	D
Sift4G	Uncertain	0.054	T
Polyphen		1.0	D
Vest4		0.29
MutPred		0.44		Gain of glycosylation at A227 (P = 0.0222)
MVP		0.68
MPC		1.2
ClinPred		0.80	D
GERP RS		3.5
Varity_R		0.14
gMVP		0.44
Mutation Taster		=78/22	polymorphism

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

Other links and lift over

dbSNP: rs374884643; hg19: chr20-58514308;