Genetic Variant PHC3:p.Lys710Thr (chr3-170117290-T-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_024947.4(PHC3):c.2129A>C(p.Lys710Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,658 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

PHC3
NM_024947.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.53

Publications

0 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:

LOC105374209 (HGNC:):

LOC105374209 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PHC3	NM_024947.4 link	c.2129A>C	p.Lys710Thr	missense_variant	Exon 10 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.2129A>C	p.Lys710Thr	missense_variant	Exon 10 of 15	1	NM_024947.4	ENSP00000420294.1	Q8NDX5-7
PHC3	ENST00000494943.5 link	c.2093A>C	p.Lys698Thr	missense_variant	Exon 10 of 15	1		ENSP00000420271.1	Q8NDX5-1
PHC3	ENST00000467570.5 link	c.1970A>C	p.Lys657Thr	missense_variant	Exon 9 of 13	2		ENSP00000419089.1	E7EX82
PHC3	ENST00000486042.1 link	c.512A>C	p.Lys171Thr	missense_variant	Exon 4 of 4	3		ENSP00000417360.1	H7C4H9

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1461658

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727114

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39684

South Asian (SAS)

AF:

0.0000348

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53402

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111840

Other (OTH)

AF:

0.00

AC:

AN:

60370

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.458

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 16, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.2129A>C (p.K710T) alteration is located in exon 10 (coding exon 10) of the PHC3 gene. This alteration results from a A to C substitution at nucleotide position 2129, causing the lysine (K) at amino acid position 710 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

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.26

BayesDel_noAF

Pathogenic

0.14

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.48

.;T;.

Eigen

Uncertain

0.22

Eigen_PC

Uncertain

0.26

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.96

D;D;D

M_CAP

Benign

0.045

MetaRNN

Uncertain

0.66

D;D;D

MetaSVM

Benign

-0.76

MutationAssessor

Uncertain

2.3

.;M;.

PhyloP100

7.5

PrimateAI

Pathogenic

0.85

PROVEAN

Pathogenic

-5.2

D;D;D

REVEL

Uncertain

0.34

Sift

Pathogenic

0.0

D;D;D

Sift4G

Benign

0.13

T;T;D

Polyphen

0.10

B;B;D

Vest4

0.94

MutPred

0.47

.;Loss of methylation at K698 (P = 5e-04);.;

MVP

0.74

MPC

0.22

ClinPred

0.98

GERP RS

5.5

Varity_R

0.78

gMVP

0.78

Mutation Taster

=37/63

disease causing

(source)

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

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chr3-170117290-T-G

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