10-77975696-C-T

Variant names:

• chr10-77975696-C-T
• rs11817392
• NM_007055.4:c.*1782G>A

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP6_Moderate BA1

The NM_007055.4(POLR3A):​c.*1782G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0246 in 152,272 control chromosomes in the GnomAD database, including 151 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.025 (151 hom., cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: POLR3A NM_007055.4 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -2.33
• Publications: 0 publications found

Genes affected

POLR3A (HGNC:30074): (RNA polymerase III subunit A) The protein encoded by this gene is the catalytic component of RNA polymerase III, which synthesizes small RNAs. The encoded protein also acts as a sensor to detect foreign DNA and trigger an innate immune response. [provided by RefSeq, Aug 2011]

POLR3A Gene-Disease associations (from GenCC):

• odontoleukodystrophy

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Illumina, Orphanet
• Wiedemann-Rautenstrauch syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae)
• leukodystrophy, hypomyelinating, 7, with or without oligodontia and/or hypogonadotropic hypogonadism

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)
• hypomyelination-cerebellar atrophy-hypoplasia of the corpus callosum syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• hypomyelination-hypogonadotropic hypogonadism-hypodontia syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• tremor-ataxia-central hypomyelination syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -10 ACMG points.

• BP6: Variant 10-77975696-C-T is Benign according to our data. Variant chr10-77975696-C-T is described in ClinVar as [Benign]. Clinvar id is 300997.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0806 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
POLR3A	NM_007055.4	c.*1782G>A		3_prime_UTR_variant	Exon 31 of 31	ENST00000372371.8	NP_008986.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POLR3A	ENST00000372371.8	c.*1782G>A		3_prime_UTR_variant	Exon 31 of 31	1	NM_007055.4	ENSP00000361446.3

Frequencies

GnomAD3 genomes AF: 0.0245 AC: 3734 AN: 152154 Hom.: 150 Cov.: 32

Gnomad AFR AF: 0.0831

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0137

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000621

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0127

Gnomad NFE AF: 0.000529

Gnomad OTH AF: 0.0191

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 64 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 50

African (AFR) AC: 0 AN: 0

American (AMR) AF: 0.00 AC: 0 AN: 2

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 2

East Asian (EAS) AF: 0.00 AC: 0 AN: 2

South Asian (SAS) AC: 0 AN: 0

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 46

Other (OTH) AF: 0.00 AC: 0 AN: 2

GnomAD4 genome AF: 0.0246 AC: 3739 AN: 152272 Hom.: 151 Cov.: 32 AF XY: 0.0237 AC XY: 1767 AN XY: 74462

African (AFR) AF: 0.0829 AC: 3446 AN: 41550

American (AMR) AF: 0.0137 AC: 209 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5182

South Asian (SAS) AF: 0.000622 AC: 3 AN: 4824

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10620

Middle Eastern (MID) AF: 0.0170 AC: 5 AN: 294

European-Non Finnish (NFE) AF: 0.000529 AC: 36 AN: 68016

Other (OTH) AF: 0.0189 AC: 40 AN: 2112

Alfa AF: 0.0176 Hom.: 17

Bravo AF: 0.0285

Asia WGS AF: 0.00577 AC: 20 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Leukoencephalopathy, ataxia, hypodontia, hypomyelination syndrome Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	8.4
DANN	Benign	0.67
PhyloP100		-2.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Mutation Taster		=100/0	polymorphism (auto)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.27		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.27		Position offset: -2

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

Other links and lift over

dbSNP: rs11817392; hg19: chr10-79735454;