20-38836136-G-A

Position:

• chr20-38836136-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_015568.4(PPP1R16B):​c.211G>A​(p.Ala71Thr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: PPP1R16B NM_015568.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.47

Genes affected

PPP1R16B (HGNC:15850): (protein phosphatase 1 regulatory subunit 16B) The protein encoded by this gene is membrane-associated and contains five ankyrin repeats, a protein phosphatase-1-interacting domain, and a carboxy-terminal CAAX box domain. Synthesis of the encoded protein is inhibited by transforming growth factor beta-1. The protein may bind to the membrane through its CAAX box domain and may act as a signaling molecule through interaction with protein phosphatase-1. Alternative splicing results in multiple transcript variants encoding different isoforms that may undergo similar processing to generate mature protein. [provided by RefSeq, Sep 2015]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.30053997).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PPP1R16B	NM_015568.4	c.211G>A	p.Ala71Thr	missense_variant	2/11	ENST00000299824.6
PPP1R16B	NM_001172735.3	c.211G>A	p.Ala71Thr	missense_variant	2/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PPP1R16B	ENST00000299824.6	c.211G>A	p.Ala71Thr	missense_variant	2/11	1	NM_015568.4	P1
PPP1R16B	ENST00000373331.2	c.211G>A	p.Ala71Thr	missense_variant	2/10	5
PPP1R16B	ENST00000468265.5	n.21G>A		non_coding_transcript_exon_variant	1/4	3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

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

Sep 22, 2021

The c.211G>A (p.A71T) alteration is located in exon 2 (coding exon 1) of the PPP1R16B gene. This alteration results from a G to A substitution at nucleotide position 211, causing the alanine (A) at amino acid position 71 to be replaced by a threonine (T). 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	Uncertain	0.34
BayesDel_addAF	Uncertain	0.029	T
BayesDel_noAF	Benign	-0.20
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.099	T;.
Eigen	Uncertain	0.30
Eigen_PC	Uncertain	0.41
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.82	T;T
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.30	T;T
MetaSVM	Benign	-0.93	T
MutationAssessor	Benign	1.3	L;L
MutationTaster	Benign	1.0	D;D
PrimateAI	Pathogenic	0.82	D
PROVEAN	Benign	0.31	N;N
REVEL	Benign	0.12
Sift	Benign	0.55	T;T
Sift4G	Benign	1.0	T;T
Polyphen		0.38	B;.
Vest4		0.50
MutPred		0.30		Gain of phosphorylation at A71 (P = 0.0778);Gain of phosphorylation at A71 (P = 0.0778);
MVP		0.65
MPC		1.4
ClinPred		0.92	D
GERP RS		5.2
Varity_R		0.090
gMVP		0.72

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr20-37464779;