rs121908564

Positions:

• chr6-43610596-C-A
• chr6-43610596-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_006502.3(POLH):​c.1117C>A​(p.Gln373Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,774 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 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: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: POLH NM_006502.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.07

Genes affected

POLH (HGNC:9181): (DNA polymerase eta) This gene encodes a member of the Y family of specialized DNA polymerases. It copies undamaged DNA with a lower fidelity than other DNA-directed polymerases. However, it accurately replicates UV-damaged DNA; when thymine dimers are present, this polymerase inserts the complementary nucleotides in the newly synthesized DNA, thereby bypassing the lesion and suppressing the mutagenic effect of UV-induced DNA damage. This polymerase is thought to be involved in hypermutation during immunoglobulin class switch recombination. Mutations in this gene result in XPV, a variant type of xeroderma pigmentosum. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2014]

POLR1C (HGNC:):

GTPBP2 (HGNC:4670): (GTP binding protein 2) GTP-binding proteins, or G proteins, constitute a superfamily capable of binding GTP or GDP. G proteins are activated by binding GTP and are inactivated by hydrolyzing GTP to GDP. This general mechanism enables G proteins to perform a wide range of biologic activities.[supplied by OMIM, Jan 2003]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.22515082).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
POLH	NM_006502.3	c.1117C>A	p.Gln373Lys	missense_variant	10/11	ENST00000372236.9	NP_006493.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
POLH	ENST00000372236.9	c.1117C>A	p.Gln373Lys	missense_variant	10/11	1	NM_006502.3	ENSP00000361310	P1
POLH	ENST00000372226.1	c.1117C>A	p.Gln373Lys	missense_variant	10/11	1		ENSP00000361300
GTPBP2	ENST00000496137.5	c.*132-5214G>T		intron_variant, NMD_transcript_variant		3		ENSP00000436973

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461774 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727204

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	21
DANN	Benign	0.96
DEOGEN2	Benign	0.12	T;.
Eigen	Benign	-0.24
Eigen_PC	Benign	-0.056
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.88	D;D
M_CAP	Benign	0.0072	T
MetaRNN	Benign	0.23	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.7	M;M
MutationTaster	Benign	0.96	D;D
PrimateAI	Benign	0.42	T
PROVEAN	Benign	-1.5	N;N
REVEL	Benign	0.054
Sift	Benign	0.36	T;T
Sift4G	Benign	0.81	T;T
Polyphen		0.017	B;.
Vest4		0.34
MutPred		0.56		Gain of methylation at Q373 (P = 0.0274);Gain of methylation at Q373 (P = 0.0274);
MVP		0.52
MPC		0.30
ClinPred		0.76	D
GERP RS		5.0
Varity_R		0.35
gMVP		0.42

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: rs121908564; hg19: chr6-43578333;