1-145826845-A-C

Variant names:

• chr1-145826845-A-C
• rs782724297
• NM_006468.8:c.429A>C

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP6

The NM_006468.8(POLR3C):​c.429A>C​(p.Glu143Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,458,984 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 7/11 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (no stars).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: POLR3C NM_006468.8 missense
• Clinical Significance: Likely benign no assertion criteria provided B:1
• Conservation: PhyloP100: 0.229

Genes affected

POLR3C (HGNC:30076): (RNA polymerase III subunit C) Enables single-stranded DNA binding activity. Involved in positive regulation of innate immune response and positive regulation of interferon-beta production. Located in nucleoplasm. Part of RNA polymerase III complex. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Likely_benign. Variant got -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.14010733).
• BP6: Variant 1-145826845-A-C is Benign according to our data. Variant chr1-145826845-A-C is described in ClinVar as [Likely_benign]. Clinvar id is 3346452.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
POLR3C	NM_006468.8	c.429A>C	p.Glu143Asp	missense_variant	Exon 4 of 15	ENST00000334163.4	NP_006459.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POLR3C	ENST00000334163.4	c.429A>C	p.Glu143Asp	missense_variant	Exon 4 of 15	1	NM_006468.8	ENSP00000334564.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000401 AC: 1 AN: 249552 Hom.: 0 AF XY: 0.00000741 AC XY: 1 AN XY: 134924

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 SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000885

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1458984 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 725570

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 9.00e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: no assertion criteria provided

Submissions by phenotype

POLR3C-related disorder Benign:1

Apr 30, 2024

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely 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	0.079
BayesDel_noAF	Benign	-0.36
CADD	Benign	15
DANN	Uncertain	0.99
DEOGEN2	Benign	0.014	T;T
LIST_S2	Benign	0.80	T;T
MetaRNN	Benign	0.14	T;T
PROVEAN	Benign	-1.1	N;N
Sift	Benign	0.21	T;T
Sift4G	Benign	0.57	T;T
Vest4		0.38
gMVP		0.96

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

Other links and lift over

dbSNP: rs782724297; hg19: chr1-145608268;