Genetic Variant PHC3:p.Arg907Trp (chr3-170102593-G-A) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4BS2

The NM_024947.4(PHC3):c.2719C>T(p.Arg907Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000547 in 1,461,610 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: not found (cov: 32)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

PHC3
NM_024947.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.46

Publications

1 publications found

Variant links:

Genes affected

PHC3 (HGNC:15682): (polyhomeotic homolog 3) Predicted to enable chromatin binding activity and histone binding activity. Predicted to be involved in negative regulation of transcription, DNA-templated. Located in nucleoplasm. Part of PRC1 complex. [provided by Alliance of Genome Resources, Apr 2022]

PHC3 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.39504308).

BS2

High AC in GnomAdExome4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PHC3	NM_024947.4 link	c.2719C>T	p.Arg907Trp	missense_variant	Exon 14 of 15	ENST00000495893.7	NP_079223.3	Q8NDX5-7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
PHC3	ENST00000495893.7 link	c.2719C>T	p.Arg907Trp	missense_variant	Exon 14 of 15	1	NM_024947.4	ENSP00000420294.1	Q8NDX5-7
PHC3	ENST00000494943.5 link	c.2683C>T	p.Arg895Trp	missense_variant	Exon 14 of 15	1		ENSP00000420271.1	Q8NDX5-1
PHC3	ENST00000484068.5 link	c.214C>T	p.Arg72Trp	missense_variant	Exon 2 of 4	4		ENSP00000418835.1	H7C528
PHC3	ENST00000467570.5 link	c.*48C>T		3_prime_UTR_variant	Exon 13 of 13	2		ENSP00000419089.1	E7EX82

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000121

AC:

AN:

248834

AF XY:

0.0000222

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000547

AC:

AN:

1461610

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

727088

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39690

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53378

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1111826

Other (OTH)

AF:

0.00

AC:

AN:

60370

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.469

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 12, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.2719C>T (p.R907W) alteration is located in exon 14 (coding exon 14) of the PHC3 gene. This alteration results from a C to T substitution at nucleotide position 2719, causing the arginine (R) at amino acid position 907 to be replaced by a tryptophan (W). 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

0.32

BayesDel_addAF

Benign

-0.071

BayesDel_noAF

Benign

-0.14

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.33

.;T

Eigen

Uncertain

0.51

Eigen_PC

Uncertain

0.47

FATHMM_MKL

Benign

0.61

LIST_S2

Uncertain

0.92

D;D

M_CAP

Benign

0.031

MetaRNN

Benign

0.40

T;T

MetaSVM

Benign

-0.80

MutationAssessor

Benign

1.5

.;L

PhyloP100

2.5

PrimateAI

Uncertain

0.75

PROVEAN

Uncertain

-2.6

D;D

REVEL

Benign

0.17

Sift

Uncertain

0.0020

D;D

Sift4G

Uncertain

0.019

D;D

Polyphen

1.0

D;D

Vest4

0.51

MutPred

0.38

.;Loss of disorder (P = 0.038);

MVP

0.38

MPC

0.61

ClinPred

0.88

GERP RS

5.1

PromoterAI

-0.019

Neutral

(source)

Varity_R

0.27

gMVP

0.50

Mutation Taster

=92/8

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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3-170102593-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over