19-45408720-A-C

Variant names:

• chr19-45408720-A-C
• rs968900148
• NM_012099.3:c.752A>C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_012099.3(POLR1G):​c.752A>C​(p.Lys251Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: POLR1G NM_012099.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.16

Genes affected

POLR1G (HGNC:24219): (RNA polymerase I subunit G) Enables RNA binding activity. Predicted to be involved in transmembrane receptor protein tyrosine kinase signaling pathway. Predicted to act upstream of or within rRNA transcription. Located in cytosol; mitochondrion; and nuclear lumen. [provided by Alliance of Genome Resources, Apr 2022]

ERCC1 (HGNC:3433): (ERCC excision repair 1, endonuclease non-catalytic subunit) The product of this gene functions in the nucleotide excision repair pathway, and is required for the repair of DNA lesions such as those induced by UV light or formed by electrophilic compounds including cisplatin. The encoded protein forms a heterodimer with the XPF endonuclease (also known as ERCC4), and the heterodimeric endonuclease catalyzes the 5' incision in the process of excising the DNA lesion. The heterodimeric endonuclease is also involved in recombinational DNA repair and in the repair of inter-strand crosslinks. Mutations in this gene result in cerebrooculofacioskeletal syndrome, and polymorphisms that alter expression of this gene may play a role in carcinogenesis. Multiple transcript variants encoding different isoforms have been found for this gene. The last exon of this gene overlaps with the CD3e molecule, epsilon associated protein gene on the opposite strand. [provided by RefSeq, Oct 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2833411).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
POLR1G	NM_012099.3	c.752A>C	p.Lys251Thr	missense_variant	Exon 3 of 3	ENST00000309424.8	NP_036231.1
ERCC1	NM_001983.4	c.*955T>G		3_prime_UTR_variant	Exon 10 of 10	ENST00000300853.8	NP_001974.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POLR1G	ENST00000309424.8	c.752A>C	p.Lys251Thr	missense_variant	Exon 3 of 3	1	NM_012099.3	ENSP00000310966.3
ERCC1	ENST00000300853	c.*955T>G		3_prime_UTR_variant	Exon 10 of 10	1	NM_001983.4	ENSP00000300853.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 37

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	18
DANN	Uncertain	0.99
DEOGEN2	Benign	0.069	T;.
Eigen	Benign	0.078
Eigen_PC	Benign	-0.050
FATHMM_MKL	Benign	0.67	D
LIST_S2	Benign	0.65	T;T
M_CAP	Benign	0.020	T
MetaRNN	Benign	0.28	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.6	M;.
PrimateAI	Benign	0.38	T
PROVEAN	Uncertain	-3.9	D;.
REVEL	Benign	0.12
Sift	Uncertain	0.0050	D;.
Sift4G	Uncertain	0.013	D;D
Polyphen		1.0	D;D
Vest4		0.26
MutPred		0.50		Loss of methylation at K251 (P = 0.0022);.;
MVP		0.32
MPC		0.37
ClinPred		0.83	D
GERP RS		2.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.27
gMVP		0.13

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: rs968900148; hg19: chr19-45911978;