2-112553197-A-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_019014.6(POLR1B):c.1158+381A>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.148 in 152,188 control chromosomes in the GnomAD database, including 2,095 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.15 (2095 hom., cov: 32)
• Consequence: POLR1B NM_019014.6 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.416

Genes affected

POLR1B (HGNC:20454): (RNA polymerase I subunit B) Eukaryotic RNA polymerase I (pol I) is responsible for the transcription of ribosomal RNA (rRNA) genes and production of rRNA, the primary component of ribosomes. Pol I is a multisubunit enzyme composed of 6 to 14 polypeptides, depending on the species. Most of the mass of the pol I complex derives from the 2 largest subunits, Rpa1 and Rpa2 in yeast. POLR1B is homologous to Rpa2 (Seither and Grummt, 1996 [PubMed 8921381]).[supplied by OMIM, Mar 2008]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.306 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
POLR1B	NM_019014.6	c.1158+381A>T		intron_variant		ENST00000263331.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
POLR1B	ENST00000263331.10	c.1158+381A>T		intron_variant		2	NM_019014.6	P1

Frequencies

GnomAD3 genomes AF: 0.147 AC: 22422 AN: 152070 Hom.: 2089 Cov.: 32

Gnomad AFR AF: 0.239

Gnomad AMI AF: 0.217

Gnomad AMR AF: 0.182

Gnomad ASJ AF: 0.0825

Gnomad EAS AF: 0.319

Gnomad SAS AF: 0.144

Gnomad FIN AF: 0.0852

Gnomad MID AF: 0.0823

Gnomad NFE AF: 0.0837

Gnomad OTH AF: 0.136

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.148 AC: 22453 AN: 152188 Hom.: 2095 Cov.: 32 AF XY: 0.149 AC XY: 11057 AN XY: 74426

Gnomad4 AFR AF: 0.239

Gnomad4 AMR AF: 0.182

Gnomad4 ASJ AF: 0.0825

Gnomad4 EAS AF: 0.319

Gnomad4 SAS AF: 0.143

Gnomad4 FIN AF: 0.0852

Gnomad4 NFE AF: 0.0837

Gnomad4 OTH AF: 0.136

Alfa AF: 0.0449 Hom.: 35

Bravo AF: 0.163

Asia WGS AF: 0.240 AC: 834 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
Cadd	Benign	0.011
Dann	Benign	0.70

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: rs9308672; hg19: chr2-113310774;