8-31141753-C-A

Position:

• chr8-31141753-C-A

Variant summary

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

The NM_000553.6(WRN):​c.3211C>A​(p.Pro1071Thr) 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. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: WRN NM_000553.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.38

Genes affected

WRN (HGNC:12791): (WRN RecQ like helicase) This gene encodes a member of the RecQ subfamily of DNA helicase proteins. The encoded nuclear protein is important in the maintenance of genome stability and plays a role in DNA repair, replication, transcription and telomere maintenance. This protein contains a N-terminal 3' to 5' exonuclease domain, an ATP-dependent helicase domain and RQC (RecQ helicase conserved region) domain in its central region, and a C-terminal HRDC (helicase RNase D C-terminal) domain and nuclear localization signal. Defects in this gene are the cause of Werner syndrome, an autosomal recessive disorder characterized by accelerated aging and an elevated risk for certain cancers. [provided by RefSeq, Aug 2017]

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=0.14319739).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
WRN	NM_000553.6	c.3211C>A	p.Pro1071Thr	missense_variant	26/35	ENST00000298139.7	NP_000544.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
WRN	ENST00000298139.7	c.3211C>A	p.Pro1071Thr	missense_variant	26/35	1	NM_000553.6	ENSP00000298139	P1
WRN	ENST00000521620.5	n.1844C>A		non_coding_transcript_exon_variant	14/23	1
WRN	ENST00000650667.1	c.*2825C>A		3_prime_UTR_variant, NMD_transcript_variant	25/34			ENSP00000498593

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 49

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Werner syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 22, 2021

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Not Available"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Not Available"). This variant has not been reported in the literature in individuals with WRN-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces proline with threonine at codon 1071 of the WRN protein (p.Pro1071Thr). The proline residue is weakly conserved and there is a small physicochemical difference between proline and threonine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.084
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.46
CADD	Benign	15
DANN	Benign	0.96
DEOGEN2	Benign	0.17	T
Eigen	Benign	-0.094
Eigen_PC	Benign	-0.0046
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.78	T
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.14	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	2.0	M
MutationTaster	Benign	0.93	N
PrimateAI	Benign	0.30	T
PROVEAN	Uncertain	-2.6	D
REVEL	Benign	0.052
Sift	Benign	0.19	T
Sift4G	Benign	0.16	T
Polyphen		0.37	B
Vest4		0.14
MutPred		0.28		Loss of ubiquitination at K1073 (P = 0.0563);
MVP		0.58
MPC		0.23
ClinPred		0.91	D
GERP RS		4.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.18
gMVP		0.35

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr8-30999269;