Genetic Variant POLA1:p.Leu16Pro (chrX-24699428-T-C) – 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_001330360.2(POLA1):c.47T>C(p.Leu16Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000191 in 1,046,361 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 22)

Exomes 𝑓: 0.0000019 ( 0 hom. 0 hem. )

Consequence

POLA1
NM_001330360.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.683

Variant links:

Genes affected

POLA1 (HGNC:9173): (DNA polymerase alpha 1, catalytic subunit) This gene encodes the catalytic subunit of DNA polymerase, which together with a regulatory and two primase subunits, forms the DNA polymerase alpha complex. The catalytic subunit plays an essential role in the initiation of DNA replication. [provided by RefSeq, Mar 2010]

POLA1 links:

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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=0.09990758).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
POLA1	NM_001330360.2 link	c.47T>C	p.Leu16Pro	missense_variant	Exon 2 of 37	ENST00000379068.8	NP_001317289.1	A6NMQ1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POLA1	ENST00000379068.8 link	c.47T>C	p.Leu16Pro	missense_variant	Exon 2 of 37	5	NM_001330360.2	ENSP00000368358.3		A6NMQ1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000141

AC:

AN:

141893

Hom.:

AF XY:

0.00

AC XY:

AN XY:

38501

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000988

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS 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:

0.00000191

AC:

AN:

1046361

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

328275

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000686

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000828

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Jun 06, 2023

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.067

BayesDel_addAF

Benign

-0.49

BayesDel_noAF

Benign

-0.94

CADD

Benign

9.7

DANN

Benign

0.89

DEOGEN2

Benign

0.29

.;.;T

FATHMM_MKL

Benign

0.39

LIST_S2

Benign

0.18

T;T;T

M_CAP

Benign

0.0046

MetaRNN

Benign

0.096

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.0

.;.;N

PrimateAI

Benign

0.47

PROVEAN

Benign

-1.8

N;.;N

REVEL

Benign

0.021

Sift

Benign

0.052

T;.;T

Sift4G

Benign

0.18

T;D;D

Polyphen

0.17

B;.;B

Vest4

0.096

MutPred

0.48

Loss of stability (P = 0.0105);.;.;

MVP

0.068

MPC

0.59

ClinPred

0.034

GERP RS

1.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.26

gMVP

0.13

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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