rs746636748

Positions:

chr8-144516069-CCT-C

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_004260.4(RECQL4):c.1048_1049del(p.Arg350GlyfsTer21) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000123 in 1,612,658 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 34)

Exomes 𝑓: 0.00012 ( 0 hom. )

Consequence

RECQL4
NM_004260.4 frameshift

Scores

Not classified

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:10

Conservation

PhyloP100: -1.26

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 Pathogenic. Variant got 18 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 8-144516069-CCT-C is Pathogenic according to our data. Variant chr8-144516069-CCT-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 197759.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr8-144516069-CCT-C is described in Lovd as [Pathogenic]. Variant chr8-144516069-CCT-C is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RECQL4	NM_004260.4 linkuse as main transcript	c.1048_1049del	p.Arg350GlyfsTer21	frameshift_variant	5/21	ENST00000617875.6	NP_004251.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris
RECQL4	ENST00000617875.6 linkuse as main transcript	c.1048_1049del	p.Arg350GlyfsTer21	frameshift_variant	5/21	1	NM_004260.4	ENSP00000482313	P1
RECQL4	ENST00000621189.4 linkuse as main transcript	c.-24_-23del		5_prime_UTR_variant	4/20	1		ENSP00000483145
RECQL4	ENST00000524998.1 linkuse as main transcript	c.570_571del	p.Arg191GlyfsTer21	frameshift_variant	3/4	3		ENSP00000476579

Frequencies

GnomAD3 genomes

AF:

0.000118

AC:

AN:

152216

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000118

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000766

AC:

AN:

247960

Hom.:

AF XY:

0.0000815

AC XY:

AN XY:

135008

show subpopulations

Gnomad AFR exome

AF:

0.000131

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000134

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000123

AC:

180

AN:

1460442

Hom.:

AF XY:

0.000118

AC XY:

AN XY:

726506

show subpopulations

Gnomad4 AFR exome

AF:

0.000179

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000145

Gnomad4 OTH exome

AF:

0.0000663

GnomAD4 genome

AF:

0.000118

AC:

AN:

152216

Hom.:

Cov.:

AF XY:

0.000134

AC XY:

AN XY:

74368

show subpopulations

Gnomad4 AFR

AF:

0.000121

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.000118

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000162

Hom.:

Bravo

AF:

0.0000793

EpiCase

AF:

0.000164

EpiControl

AF:

0.00

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:10

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:5

Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Aug 29, 2023	Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; This variant is associated with the following publications: (PMID: 28492532, 32769558, 25120469, 12734318, 28039508, 18716613, 21143835, 18504617, 27247962, 29642415, 29625052, 34426522, 31589614, 33718801, 34964962) -
Pathogenic, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Sep 03, 2014	- -
Pathogenic, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -
Pathogenic, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	May 01, 2024	RECQL4: PVS1, PM2, PM3 -

Rothmund-Thomson syndrome type 2

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	St. Jude Molecular Pathology, St. Jude Children's Research Hospital	Sep 21, 2022	The RECQL4 c.1048_1049del (p.Arg350GlyfsTer21) change removes two nucleotides to cause a frameshift and the creation of a premature stop codon. This change is predicted to cause protein truncation or absence of the protein due to nonsense mediated decay. This variant has a maximum subpopulation frequency of 0.021% in gnomAD v2.1.1 (https://gnomad.broadinstitute.org/). This variant has been reported in the literature as compound heterozygous in individuals with Rothmund–Thomson syndrome (PMID: 18716613, 21143835, 25120469, 28039508). In summary, this variant meets criteria to be classified as pathogenic. -
Likely pathogenic, criteria provided, single submitter	clinical testing	Greenwood Genetic Center Diagnostic Laboratories, Greenwood Genetic Center	Jul 15, 2021	PVS1, PM2 -

Baller-Gerold syndrome;C1849453:Rapadilino syndrome;C5203410:Rothmund-Thomson syndrome type 2

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Apr 07, 2022

- -

Baller-Gerold syndrome

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 26, 2024

This sequence change creates a premature translational stop signal (p.Arg350Glyfs*21) in the RECQL4 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in RECQL4 are known to be pathogenic (PMID: 12734318, 12952869). This variant is present in population databases (rs746636748, gnomAD 0.02%). This premature translational stop signal has been observed in individual(s) with Rothmund-Thomson syndrome (PMID: 12734318, 18716613, 21143835, 25120469, 28039508). This variant is also known as g.1798delAG. ClinVar contains an entry for this variant (Variation ID: 197759). For these reasons, this variant has been classified as Pathogenic. -

RECQL4-related disorder

Pathogenic:1

Pathogenic, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Sep 12, 2024

The RECQL4 c.1048_1049delAG variant is predicted to result in a frameshift and premature protein termination (p.Arg350Glyfs*21). This variant has been reported in the compound heterozygous state in individuals with Rothmund Thomson Syndrome (RTS) (Reported as g.1798delAG, Wang et al 2003. PubMed ID: 12734318; Siitonen et al. 2008. PubMed ID: 18716613; De Somer et al. 2010. PubMed ID: 21143835; Guerrero-González et al. 2014. PubMed ID: 25120469; van Rij MC et al 2016. PubMed ID: 28039508). This variant is reported in 0.021% of alleles in individuals of African descent in gnomAD. Frameshift variants in RECQL4 are expected to be pathogenic. This variant is interpreted as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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