8-144515991-C-G

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_004260.4(RECQL4):c.1128G>C(p.Lys376Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000808 in 1,609,320 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 9/13 in silico tools predict a benign outcome for this variant. 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. K376R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 34)

Exomes 𝑓: 0.0000069 ( 0 hom. )

Consequence

RECQL4
NM_004260.4 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 0.240

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:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.24753118).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004260.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
RECQL4	NM_004260.4	MANE Select	c.1128G>C	p.Lys376Asn	missense	Exon 5 of 21	NP_004251.4
RECQL4	NM_001413019.1		c.1128G>C	p.Lys376Asn	missense	Exon 5 of 20	NP_001399948.1
RECQL4	NM_001413036.1		c.1128G>C	p.Lys376Asn	missense	Exon 5 of 21	NP_001399965.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
RECQL4	ENST00000617875.6	TSL:1 MANE Select	c.1128G>C	p.Lys376Asn	missense	Exon 5 of 21	ENSP00000482313.2
RECQL4	ENST00000621189.4	TSL:1	c.57G>C	p.Lys19Asn	missense	Exon 4 of 20	ENSP00000483145.1
RECQL4	ENST00000532846.2	TSL:5	c.12G>C	p.Lys4Asn	missense	Exon 1 of 9	ENSP00000476551.1

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152210

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000325

AC:

AN:

246224

AF XY:

0.0000373

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000722

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000686

AC:

AN:

1457110

Hom.:

Cov.:

AF XY:

0.00000552

AC XY:

AN XY:

724112

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33430

American (AMR)

AF:

0.00

AC:

AN:

44628

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26036

East Asian (EAS)

AF:

0.00

AC:

AN:

39608

South Asian (SAS)

AF:

0.00

AC:

AN:

86188

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52034

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

0.00000902

AC:

AN:

1109194

Other (OTH)

AF:

0.00

AC:

AN:

60234

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.470

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

AF:

0.0000197

AC:

AN:

152210

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74352

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41452

American (AMR)

AF:

0.00

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4836

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68036

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000113

ExAC

AF:

0.0000497

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

Jan 11, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.K376N variant (also known as c.1128G>C), located in coding exon 5 of the RECQL4 gene, results from a G to C substitution at nucleotide position 1128. The lysine at codon 376 is replaced by asparagine, an amino acid with similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear.

not provided

Uncertain:1

Dec 16, 2022

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge

Baller-Gerold syndrome

Uncertain:1

Aug 04, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on RECQL4 protein function. ClinVar contains an entry for this variant (Variation ID: 583011). This variant has not been reported in the literature in individuals affected with RECQL4-related conditions. This variant is present in population databases (rs764389677, gnomAD 0.007%). This sequence change replaces lysine, which is basic and polar, with asparagine, which is neutral and polar, at codon 376 of the RECQL4 protein (p.Lys376Asn).

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.62

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.35

CADD

Benign

(source)

DANN

Benign

0.85

DEOGEN2

Benign

0.080

FATHMM_MKL

Uncertain

0.80

LIST_S2

Benign

0.72

M_CAP

Benign

0.010

MetaRNN

Benign

0.25

PhyloP100

0.24

PrimateAI

Benign

0.44

Sift4G

Uncertain

0.023

Polyphen

0.99

Vest4

0.48

MVP

0.74

GERP RS

4.7

PromoterAI

0.029

Neutral

(source)

Varity_R

0.16

gMVP

0.44

Mutation Taster

=61/39

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over