chr15-55355419-A-C

Variant names:

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_004855.5(PIGB):c.1652A>C(p.Lys551Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00363 in 1,607,172 control chromosomes in the GnomAD database, including 178 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely benign in UniProt.

Frequency

Genomes: 𝑓 0.020 ( 89 hom., cov: 32)

Exomes 𝑓: 0.0019 ( 89 hom. )

Consequence

PIGB
NM_004855.5 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 1.67

Variant links:

Genes affected

PIGB (HGNC:8959): (phosphatidylinositol glycan anchor biosynthesis class B) This gene encodes a transmembrane protein that is located in the endoplasmic reticulum and is involved in GPI-anchor biosynthesis. The glycosylphosphatidylinositol (GPI) anchor is a glycolipid found on many blood cells and serves to anchor proteins to the cell surface. This gene is thought to encode a member of a family of dolichol-phosphate-mannose (Dol-P-Man) dependent mannosyltransferases. [provided by RefSeq, Jul 2008]

PIGB links:

CCPG1 (HGNC:24227): (cell cycle progression 1) Involved in positive regulation of cell cycle and positive regulation of cell population proliferation. Predicted to be integral component of membrane. Predicted to be active in membrane. [provided by Alliance of Genome Resources, Apr 2022]

CCPG1 links:

DNAAF4-CCPG1 (HGNC:43019): (DNAAF4-CCPG1 readthrough (NMD candidate)) This locus represents naturally occurring read-through transcription between the neighboring dyslexia susceptibility 1 candidate 1 (DYX1C1) and cell cycle progression 1 (CCPG1) genes on chromosome 15. The read-through transcript is a candidate for nonsense-mediated mRNA decay (NMD), and is thus unlikely to produce a protein product. [provided by RefSeq, Mar 2011]

DNAAF4-CCPG1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0020714402).

BP6

Variant 15-55355419-A-C is Benign according to our data. Variant chr15-55355419-A-C is described in ClinVar as [Benign]. Clinvar id is 785488.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0666 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PIGB	NM_004855.5 link	c.1652A>C	p.Lys551Thr	missense_variant	Exon 12 of 12	ENST00000164305.10	NP_004846.4	Q92521
CCPG1	NM_001204450.2 link	c.*801T>G		3_prime_UTR_variant	Exon 9 of 9	ENST00000442196.8	NP_001191379.1	Q9ULG6-5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PIGB	ENST00000164305.10 link	c.1652A>C	p.Lys551Thr	missense_variant	Exon 12 of 12	1	NM_004855.5	ENSP00000164305.5		Q92521
CCPG1	ENST00000442196 link	c.*801T>G		3_prime_UTR_variant	Exon 9 of 9	2	NM_001204450.2	ENSP00000403400.3		Q9ULG6-5

Frequencies

GnomAD3 genomes

AF:

0.0197

AC:

2997

AN:

152214

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0685

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00837

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000132

Gnomad OTH

AF:

0.00862

GnomAD3 exomes

AF:

0.00492

AC:

1180

AN:

239680

Hom.:

AF XY:

0.00368

AC XY:

479

AN XY:

130104

show subpopulations

Gnomad AFR exome

AF:

0.0674

Gnomad AMR exome

AF:

0.00369

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000702

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000120

Gnomad OTH exome

AF:

0.00154

GnomAD4 exome

AF:

0.00193

AC:

2815

AN:

1454840

Hom.:

Cov.:

AF XY:

0.00160

AC XY:

1154

AN XY:

723498

show subpopulations

Gnomad4 AFR exome

AF:

0.0678

Gnomad4 AMR exome

AF:

0.00417

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000947

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000802

Gnomad4 OTH exome

AF:

0.00461

GnomAD4 genome

AF:

0.0198

AC:

3013

AN:

152332

Hom.:

Cov.:

AF XY:

0.0193

AC XY:

1435

AN XY:

74482

show subpopulations

Gnomad4 AFR

AF:

0.0687

Gnomad4 AMR

AF:

0.00836

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000132

Gnomad4 OTH

AF:

0.00853

Alfa

AF:

0.00379

Hom.:

Bravo

AF:

0.0226

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.0657

AC:

239

ESP6500EA

AF:

0.000246

AC:

ExAC

AF:

0.00598

AC:

723

Asia WGS

AF:

0.00376

AC:

AN:

3474

EpiCase

AF:

0.000110

EpiControl

AF:

0.000119

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 02, 2025	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

PIGB-related disorder

Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Dec 12, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.55

BayesDel_noAF

Benign

-0.51

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.0028

T;T

Eigen

Benign

-0.54

Eigen_PC

Benign

-0.45

FATHMM_MKL

Uncertain

0.91

LIST_S2

Benign

0.43

T;T

MetaRNN

Benign

0.0021

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.34

N;.

PrimateAI

Benign

0.36

PROVEAN

Benign

-0.32

N;.

REVEL

Benign

0.062

Sift

Uncertain

0.014

D;.

Sift4G

Uncertain

0.053

T;T

Polyphen

0.32

B;.

Vest4

0.16

MVP

0.51

MPC

0.057

ClinPred

0.014

GERP RS

3.4

Varity_R

0.063

gMVP

0.30

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