Genetic Variant RECQL4:c.214-3C>A (chr8-144517193-G-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_004260.4(RECQL4):c.214-3C>A variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000563 in 1,597,398 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00026 ( 0 hom., cov: 35)

Exomes 𝑓: 0.000035 ( 0 hom. )

Consequence

RECQL4
NM_004260.4 splice_region, intron

Scores

Splicing: ADA: 0.00005525

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:7

Conservation

PhyloP100: 2.21

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:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.85).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RECQL4	NM_004260.4 link	c.214-3C>A		splice_region_variant, intron_variant	Intron 3 of 20	ENST00000617875.6	NP_004251.4	O94761

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RECQL4	ENST00000617875.6 link	c.214-3C>A		splice_region_variant, intron_variant	Intron 3 of 20	1	NM_004260.4	ENSP00000482313.2		O94761

Frequencies

GnomAD3 genomes

AF:

0.000256

AC:

AN:

152250

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000868

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000555

AC:

AN:

216030

Hom.:

AF XY:

0.0000504

AC XY:

AN XY:

119120

show subpopulations

Gnomad AFR exome

AF:

0.000745

Gnomad AMR exome

AF:

0.0000951

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000346

AC:

AN:

1445030

Hom.:

Cov.:

AF XY:

0.0000334

AC XY:

AN XY:

718104

show subpopulations

Gnomad4 AFR exome

AF:

0.00111

Gnomad4 AMR exome

AF:

0.0000940

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000256

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.000134

GnomAD4 genome

AF:

0.000263

AC:

AN:

152368

Hom.:

Cov.:

AF XY:

0.000228

AC XY:

AN XY:

74522

show subpopulations

Gnomad4 AFR

AF:

0.000890

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.000397

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Dec 08, 2021

Revvity Omics, Revvity

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 17, 2019

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis, which includes splice predictors and evolutionary conservation, supports a deleterious effect; Has not been previously published as pathogenic or benign to our knowledge -

not specified

Uncertain:1

May 11, 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 in intron 3, c.214-3C>A. This 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 0.082% in the African American subpopulation (dbSNP rs367849648). In-silico splice prediction programs provide inconclusive results for this sequence change. The functional significance of this sequence change is not known at present and its contribution to this individual's disease phenotype cannot definitively be determined. -

Rothmund-Thomson syndrome type 2

Uncertain:1

May 06, 2022

St. Jude Molecular Pathology, St. Jude Children's Research Hospital

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The RECQL4 c.214-3C>A intronic change results from a C to A substitution at the -3 position of intron 3 of the RECQL4 gene. Algorithms that predict the impact of sequence changes on splicing indicate that this variant does not affect splicing (BP4), but to our knowledge these predictions have not been confirmed by RNA studies. This variant has a maximum subpopulation frequency of 0.081% in gnomAD v2.1.1. To our knowledge, this variant has not been reported in individuals with RECQL4-associated disorders. In summary, this variant meets criteria to be classified as of uncertain significance based on the ACMG/AMP criteria: BP4. -

Baller-Gerold syndrome

Uncertain:1

Jan 28, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change falls in intron 3 of the RECQL4 gene. It does not directly change the encoded amino acid sequence of the RECQL4 protein. It affects a nucleotide within the consensus splice site. This variant is present in population databases (rs367849648, gnomAD 0.09%). This variant has not been reported in the literature in individuals affected with RECQL4-related conditions. ClinVar contains an entry for this variant (Variation ID: 406957). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant is not likely to affect RNA splicing. 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. -

Hereditary cancer-predisposing syndrome

Uncertain:1

Jul 03, 2021

Sema4, Sema4

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: curation

- -

RECQL4-related disorder

Uncertain:1

Aug 07, 2024

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

The RECQL4 c.214-3C>A variant is predicted to interfere with splicing. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.082% of alleles in individuals of African descent in gnomAD. It is interpreted as uncertain significance in ClinVar (https://www.ncbi.nlm.nih.gov/clinvar/variation/406957/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.85

CADD

Benign

DANN

Benign

0.66

RBP_binding_hub_radar

0.85

RBP_regulation_power_radar

2.1

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000055

dbscSNV1_RF

Benign

0.0

SpliceAI score (max)

0.020

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