8-144515803-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_004260.4(RECQL4):c.1219G>A(p.Glu407Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000321 in 1,612,704 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 10/13 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00023 ( 0 hom., cov: 34)

Exomes 𝑓: 0.00033 ( 0 hom. )

Consequence

RECQL4
NM_004260.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:7B:1

Conservation

PhyloP100: 2.98

Variant links:

Genes affected

RECQL4 (HGNC:9949): (RecQ like helicase 4) The protein encoded by this gene is a DNA helicase that belongs to the RecQ helicase family. DNA helicases unwind double-stranded DNA into single-stranded DNAs and may modulate chromosome segregation. This gene is predominantly expressed in thymus and testis. Mutations in this gene are associated with Rothmund-Thomson, RAPADILINO and Baller-Gerold syndromes. [provided by RefSeq, Jan 2010]

RECQL4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.093945086).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RECQL4	NM_004260.4 link	c.1219G>A	p.Glu407Lys	missense_variant	Exon 6 of 21	ENST00000617875.6	NP_004251.4	O94761

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RECQL4	ENST00000617875.6 link	c.1219G>A	p.Glu407Lys	missense_variant	Exon 6 of 21	1	NM_004260.4	ENSP00000482313.2		O94761

Frequencies

GnomAD3 genomes

AF:

0.000230

AC:

AN:

152208

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.000456

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000170

AC:

AN:

247084

Hom.:

AF XY:

0.000171

AC XY:

AN XY:

134634

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000175

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000328

Gnomad FIN exome

AF:

0.0000465

Gnomad NFE exome

AF:

0.000305

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000330

AC:

482

AN:

1460378

Hom.:

Cov.:

AF XY:

0.000289

AC XY:

210

AN XY:

726404

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

Gnomad4 AMR exome

AF:

0.000179

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.0000381

Gnomad4 NFE exome

AF:

0.000416

Gnomad4 OTH exome

AF:

0.0000994

GnomAD4 genome

AF:

0.000230

AC:

AN:

152326

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

AN XY:

74480

show subpopulations

Gnomad4 AFR

AF:

0.0000722

Gnomad4 AMR

AF:

0.0000653

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000456

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000288

Hom.:

Bravo

AF:

0.000196

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ExAC

AF:

0.0000828

AC:

EpiCase

AF:

0.000382

EpiControl

AF:

0.000237

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:7Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Jun 09, 2022

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

The RECQL4 p.Glu407Lys variant was not identified in the literature but was identified in dbSNP (ID: rs117670586), ClinVar (classified as uncertain significance by Invitae and Fulgent Genetics) and Cosmic. The variant was identified in control databases in 45 of 265340 chromosomes at a frequency of 0.0001696 (Genome Aggregation Database March 6, 2019, v2.1.1, non-cancer). The variant was observed in the following populations: European (non-Finnish) in 36 of 117170 chromosomes (freq: 0.000307), Latino in 6 of 34898 chromosomes (freq: 0.000172), African in 1 of 22644 chromosomes (freq: 0.000044), European (Finnish) in 1 of 24966 chromosomes (freq: 0.00004) and South Asian in 1 of 30398 chromosomes (freq: 0.000033), but was not observed in the Ashkenazi Jewish, East Asian, or Other populations. The p.Glu407 residue is not conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) do not suggest a high likelihood of impact to the protein; however, this information is not predictive enough to rule out pathogenicity. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time. This variant is classified as a variant of uncertain significance. -

not specified

Uncertain:1

Jul 13, 2022

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

DNA sequence analysis of the RECQL4 gene demonstrated a sequence change, c.1219G>A, in exon 6 that results in an amino acid change, p.Glu407Lys. This sequence change does not appear to have been previously described in individuals with RECQL4-related disorders. This sequence change has been described in the gnomAD database with a frequency of 0.017% in the overall population (dbSNP rs117670586). The p.Glu407Lys change affects a poorly conserved amino acid residue located in a domain of the RECQL4 protein that is not known to be functional. The p.Glu407Lys substitution appears to be benign using several in-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD). Due to insufficient evidences and the lack of functional studies, the clinical significance of the p.Glu407Lys change remains unknown at this time. -

Inborn genetic diseases

Uncertain:1

Jun 02, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1219G>A (p.E407K) alteration is located in exon 6 (coding exon 6) of the RECQL4 gene. This alteration results from a G to A substitution at nucleotide position 1219, causing the glutamic acid (E) at amino acid position 407 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Rothmund-Thomson syndrome;C0265308:Baller-Gerold syndrome;C1849453:Rapadilino syndrome

Uncertain:1

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary cancer-predisposing syndrome

Uncertain:1

Aug 03, 2021

Sema4, Sema4

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: curation

- -

RECQL4-related disorder

Uncertain:1

Dec 06, 2023

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

The RECQL4 c.1219G>A variant is predicted to result in the amino acid substitution p.Glu407Lys. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.030% of alleles in individuals of European (Non-Finnish) descent in gnomAD and has conflicting interpretations in ClinVar, ranging from uncertain significance to likely benign (https://www.ncbi.nlm.nih.gov/clinvar/variation/239694/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Baller-Gerold syndrome

Benign:1

Jan 13, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.074

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.27

CADD

Benign

DANN

Benign

0.64

DEOGEN2

Benign

0.013

T;T

FATHMM_MKL

Benign

0.29

LIST_S2

Benign

0.72

T;T

M_CAP

Benign

0.0049

MetaRNN

Benign

0.094

T;T

PrimateAI

Benign

0.32

Sift4G

Uncertain

0.015

D;D

Polyphen

0.43

.;B

Vest4

0.32

MVP

0.76

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.15

gMVP

0.39

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.080

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over