Genetic Variant PIP4P1:p.Arg205Cys (chr14-20459283-G-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_144568.4(PIP4P1):c.613C>T(p.Arg205Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000331 in 1,614,174 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00035 ( 0 hom. )

Consequence

PIP4P1
NM_144568.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.95

Variant links:

Genes affected

PIP4P1 (HGNC:19299): (phosphatidylinositol-4,5-bisphosphate 4-phosphatase 1) TMEM55B catalyzes the degradation of phosphatidylinositol 4,5-bisphosphate (PtdIns-4,5-P2) by removing the 4-phosphate (Ungewickell et al., 2005 [PubMed 16365287]).[supplied by OMIM, Mar 2008]

PIP4P1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.25910693).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PIP4P1	NM_144568.4 link	c.613C>T	p.Arg205Cys	missense_variant	Exon 6 of 7	ENST00000250489.9	NP_653169.2	Q86T03-1
PIP4P1	NM_001100814.3 link	c.634C>T	p.Arg212Cys	missense_variant	Exon 6 of 7		NP_001094284.1	Q86T03-2
PIP4P1	XM_024449739.2 link	c.528C>T	p.Gly176Gly	synonymous_variant	Exon 5 of 6		XP_024305507.1
PIP4P1	XM_024449740.2 link	c.507C>T	p.Gly169Gly	synonymous_variant	Exon 5 of 6		XP_024305508.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PIP4P1	ENST00000250489.9 link	c.613C>T	p.Arg205Cys	missense_variant	Exon 6 of 7	1	NM_144568.4	ENSP00000250489.4		Q86T03-1

Frequencies

GnomAD3 genomes

AF:

0.000177

AC:

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000283

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000323

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000318

AC:

AN:

251486

Hom.:

AF XY:

0.000331

AC XY:

AN XY:

135920

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000554

Gnomad NFE exome

AF:

0.000563

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.000347

AC:

508

AN:

1461884

Hom.:

Cov.:

AF XY:

0.000353

AC XY:

257

AN XY:

727246

show subpopulations

Gnomad4 AFR exome

AF:

0.000239

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.000768

Gnomad4 NFE exome

AF:

0.000398

Gnomad4 OTH exome

AF:

0.000232

GnomAD4 genome

AF:

0.000177

AC:

AN:

152290

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74466

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000283

Gnomad4 NFE

AF:

0.000323

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000329

Hom.:

Bravo

AF:

0.000204

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00116

AC:

ExAC

AF:

0.000486

AC:

EpiCase

AF:

0.000327

EpiControl

AF:

0.000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 26, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.634C>T (p.R212C) alteration is located in exon 6 (coding exon 6) of the TMEM55B gene. This alteration results from a C to T substitution at nucleotide position 634, causing the arginine (R) at amino acid position 212 to be replaced by a cysteine (C). 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

Benign

0.18

BayesDel_addAF

Benign

-0.22

BayesDel_noAF

Benign

-0.21

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.087

T;.

Eigen

Uncertain

0.31

Eigen_PC

Uncertain

0.31

FATHMM_MKL

Uncertain

0.79

LIST_S2

Uncertain

0.90

D;D

M_CAP

Benign

0.0059

MetaRNN

Benign

0.26

T;T

MetaSVM

Benign

-0.80

PrimateAI

Uncertain

0.73

PROVEAN

Benign

-1.5

N;N

REVEL

Benign

0.23

Sift

Benign

0.097

T;T

Sift4G

Benign

0.063

T;T

Polyphen

1.0

D;D

Vest4

0.68

MVP

0.11

MPC

1.4

ClinPred

0.26

GERP RS

3.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.14

gMVP

0.60

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over