Genetic Variant PHC2:p.Pro400Leu (chr1-33355031-G-A) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_001385109.1(PHC2):c.1199C>T(p.Pro400Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00111 in 1,613,770 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0012 ( 4 hom. )

Consequence

PHC2
NM_001385109.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.13

Variant links:

Genes affected

PHC2 (HGNC:3183): (polyhomeotic homolog 2) In Drosophila melanogaster, the 'Polycomb' group (PcG) of genes are part of a cellular memory system that is responsible for the stable inheritance of gene activity. PcG proteins form a large multimeric, chromatin-associated protein complex. The protein encoded by this gene has homology to the Drosophila PcG protein 'polyhomeotic' (Ph) and is known to heterodimerize with EDR1 and colocalize with BMI1 in interphase nuclei of human cells. The specific function in human cells has not yet been determined. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

PHC2 links:

PHC2-AS1 (HGNC:40205): (PHC2 antisense RNA 1)

PHC2-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.06283191).

BS2

High Homozygotes in GnomAdExome4 at 4 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PHC2	NM_001385109.1 link	c.1199C>T	p.Pro400Leu	missense_variant	Exon 8 of 15	ENST00000683057.1	NP_001372038.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PHC2	ENST00000683057.1 link	c.1199C>T	p.Pro400Leu	missense_variant	Exon 8 of 15		NM_001385109.1	ENSP00000507877.1		Q8IXK0-5

Frequencies

GnomAD3 genomes

AF:

0.000663

AC:

101

AN:

152226

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00124

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00104

Gnomad OTH

AF:

0.00143

GnomAD3 exomes

AF:

0.000548

AC:

136

AN:

248322

Hom.:

AF XY:

0.000535

AC XY:

AN XY:

134460

show subpopulations

Gnomad AFR exome

AF:

0.000187

Gnomad AMR exome

AF:

0.000435

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000972

Gnomad OTH exome

AF:

0.00115

GnomAD4 exome

AF:

0.00115

AC:

1683

AN:

1461426

Hom.:

Cov.:

AF XY:

0.00106

AC XY:

774

AN XY:

727012

show subpopulations

Gnomad4 AFR exome

AF:

0.000149

Gnomad4 AMR exome

AF:

0.000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.000132

Gnomad4 NFE exome

AF:

0.00141

Gnomad4 OTH exome

AF:

0.00113

GnomAD4 genome

AF:

0.000663

AC:

101

AN:

152344

Hom.:

Cov.:

AF XY:

0.000671

AC XY:

AN XY:

74496

show subpopulations

Gnomad4 AFR

AF:

0.000168

Gnomad4 AMR

AF:

0.00124

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.00104

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.000836

Hom.:

Bravo

AF:

0.000786

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.00105

AC:

ExAC

AF:

0.000387

AC:

EpiCase

AF:

0.000872

EpiControl

AF:

0.000771

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 23, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1199C>T (p.P400L) alteration is located in exon 7 (coding exon 7) of the PHC2 gene. This alteration results from a C to T substitution at nucleotide position 1199, causing the proline (P) at amino acid position 400 to be replaced by a leucine (L). 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

0.084

BayesDel_addAF

Benign

-0.088

BayesDel_noAF

Uncertain

0.030

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.084

T;T;T

Eigen

Uncertain

0.35

Eigen_PC

Uncertain

0.39

FATHMM_MKL

Benign

0.74

LIST_S2

Uncertain

0.87

D;D;D

M_CAP

Benign

0.012

MetaRNN

Benign

0.063

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.55

.;.;N

PrimateAI

Benign

0.44

PROVEAN

Benign

-2.3

N;N;N

REVEL

Benign

0.13

Sift

Uncertain

0.0020

D;D;D

Sift4G

Benign

0.096

T;D;T

Polyphen

0.98

.;.;D

Vest4

0.55

MVP

0.57

MPC

1.1

ClinPred

0.033

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.11

gMVP

0.40

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