6-43520962-G-C

Variant names:

• chr6-43520962-G-C
• rs191582628
• NM_203290.4:c.836G>C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PM5 PP3_Moderate

The NM_203290.4(POLR1C):​c.836G>C​(p.Arg279Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,166 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R279Q) has been classified as Pathogenic.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: POLR1C NM_203290.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 10.0

Genes affected

POLR1C (HGNC:20194): (RNA polymerase I and III subunit C) The protein encoded by this gene is a subunit of both RNA polymerase I and RNA polymerase III complexes. The encoded protein is part of the Pol core element. Mutations in this gene have been associated with Treacher Collins syndrome (TCS) and hypomyelinating leukodystrophy 11. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr6-43520962-G-A is described in Lovd as [Pathogenic].
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.862

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
POLR1C	NM_203290.4	c.836G>C	p.Arg279Pro	missense_variant	Exon 8 of 9	ENST00000642195.1	NP_976035.1
POLR1C	NM_001318876.2	c.836G>C	p.Arg279Pro	missense_variant	Exon 8 of 9		NP_001305805.1
POLR1C	NM_001363658.2	c.836G>C	p.Arg279Pro	missense_variant	Exon 8 of 10		NP_001350587.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POLR1C	ENST00000642195.1	c.836G>C	p.Arg279Pro	missense_variant	Exon 8 of 9		NM_203290.4	ENSP00000496044.1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152166 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152166 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74350

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.78	.;D;.;D;.;.;.;.;.
Eigen	Pathogenic	0.79
Eigen_PC	Pathogenic	0.77
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.96	D;.;.;D;D;.;D;D;D
M_CAP	Uncertain	0.16	D
MetaRNN	Pathogenic	0.86	D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.38	D
MutationAssessor	Uncertain	2.3	.;M;.;M;.;M;.;M;.
PrimateAI	Uncertain	0.61	T
PROVEAN	Pathogenic	-6.1	.;D;D;.;.;D;.;.;.
REVEL	Pathogenic	0.82
Sift	Uncertain	0.021	.;D;D;.;.;D;.;.;.
Sift4G	Uncertain	0.015	.;D;D;.;.;D;.;.;.
Polyphen		1.0	.;D;.;D;.;D;.;D;.
Vest4		0.93, 0.87, 0.95
MutPred		0.61		.;Gain of sheet (P = 0.0011);.;Gain of sheet (P = 0.0011);.;Gain of sheet (P = 0.0011);Gain of sheet (P = 0.0011);Gain of sheet (P = 0.0011);Gain of sheet (P = 0.0011);
MVP		0.96
MPC		0.52
ClinPred		1.0	D
GERP RS		4.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.92
gMVP		0.84

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: rs191582628; hg19: chr6-43488700;