8-144512862-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_004260.4(RECQL4):c.2740G>A(p.Asp914Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000117 in 1,450,524 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D914H) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 34)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

RECQL4
NM_004260.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 2.90

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

Baller-Gerold syndrome
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: PanelApp Australia, G2P, Orphanet
Rothmund-Thomson syndrome
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
Rothmund-Thomson syndrome type 2
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Genomics England PanelApp, G2P
osteosarcoma
Inheritance: AR Classification: STRONG Submitted by: Genomics England PanelApp
rapadilino syndrome
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Genomics England PanelApp

RECQL4 links:

ENSG00000265393 (HGNC:):

ENSG00000265393 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RECQL4	NM_004260.4 link	c.2740G>A	p.Asp914Asn	missense_variant	Exon 15 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.2740G>A	p.Asp914Asn	missense_variant	Exon 15 of 21	1	NM_004260.4	ENSP00000482313.2		O94761

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000217

AC:

AN:

230500

AF XY:

0.0000239

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000318

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000968

Gnomad OTH exome

AF:

0.000176

GnomAD4 exome

AF:

0.0000117

AC:

AN:

1450524

Hom.:

Cov.:

AF XY:

0.00000971

AC XY:

AN XY:

720574

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33318

American (AMR)

AF:

0.00

AC:

AN:

43274

Ashkenazi Jewish (ASJ)

AF:

0.000310

AC:

AN:

25766

East Asian (EAS)

AF:

0.00

AC:

AN:

39290

South Asian (SAS)

AF:

0.00

AC:

AN:

84764

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51384

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5754

European-Non Finnish (NFE)

AF:

0.00000542

AC:

AN:

1107004

Other (OTH)

AF:

0.0000500

AC:

AN:

59970

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.469

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000901

Hom.:

Bravo

AF:

0.00000378

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000118

AC:

ExAC

AF:

0.0000167

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Jul 09, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.2740G>A (p.D914N) alteration is located in exon 15 (coding exon 15) of the RECQL4 gene. This alteration results from a G to A substitution at nucleotide position 2740, causing the aspartic acid (D) at amino acid position 914 to be replaced by an asparagine (N). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

not provided

Uncertain:1

Nov 03, 2021

Institute for Clinical Genetics, University Hospital TU Dresden, University Hospital TU Dresden

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Baller-Gerold syndrome

Uncertain:1

Aug 18, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces aspartic acid, which is acidic and polar, with asparagine, which is neutral and polar, at codon 914 of the RECQL4 protein (p.Asp914Asn). This variant is present in population databases (rs371327041, gnomAD 0.04%). 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: 459428). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is expected to disrupt RECQL4 protein function with a positive predictive value of 80%. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.68

BayesDel_addAF

Uncertain

0.015

BayesDel_noAF

Benign

-0.22

CADD

Uncertain

(source)

DANN

Benign

0.90

DEOGEN2

Benign

0.12

T;T

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.92

D;D

M_CAP

Uncertain

0.14

MetaRNN

Uncertain

0.71

D;D

MutationAssessor

Pathogenic

3.2

.;M

PhyloP100

2.9

PrimateAI

Uncertain

0.52

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

.;D

Vest4

0.67

MVP

0.76

GERP RS

4.3

PromoterAI

-0.0080

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.17

gMVP

0.61

Mutation Taster

=73/27

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

Details are displayed if max score is > 0.2

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over