NM_004260.4:c.2485C>T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_004260.4(RECQL4):c.2485C>T(p.Arg829Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000141 in 1,558,426 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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. R829H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 34)

Exomes 𝑓: 0.0000099 ( 0 hom. )

Consequence

RECQL4
NM_004260.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.34

Publications

1 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 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.37046236).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RECQL4	NM_004260.4 link	c.2485C>T	p.Arg829Cys	missense_variant	Exon 15 of 21	ENST00000617875.6	NP_004251.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
RECQL4	ENST00000617875.6 link	c.2485C>T	p.Arg829Cys	missense_variant	Exon 15 of 21	1	NM_004260.4	ENSP00000482313.2
RECQL4	ENST00000621189.4 link	c.1414C>T	p.Arg472Cys	missense_variant	Exon 14 of 20	1		ENSP00000483145.1
RECQL4	ENST00000534626.6 link	c.655C>T	p.Arg219Cys	missense_variant	Exon 6 of 8	5		ENSP00000477457.1
ENSG00000265393	ENST00000580385.1 link	n.271+280G>A		intron_variant	Intron 1 of 1	3

Frequencies

GnomAD3 genomes

AF:

0.0000531

AC:

AN:

150626

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000171

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:

0.0000969

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000244

AC:

AN:

205004

AF XY:

0.0000271

show subpopulations

Gnomad AFR exome

AF:

0.0000760

Gnomad AMR exome

AF:

0.0000323

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000566

Gnomad NFE exome

AF:

0.0000218

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000994

AC:

AN:

1407800

Hom.:

Cov.:

AF XY:

0.0000144

AC XY:

AN XY:

694022

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32250

American (AMR)

AF:

0.0000486

AC:

AN:

41160

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

23050

East Asian (EAS)

AF:

0.00

AC:

AN:

38194

South Asian (SAS)

AF:

0.0000253

AC:

AN:

79120

European-Finnish (FIN)

AF:

0.0000206

AC:

AN:

48544

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5530

European-Non Finnish (NFE)

AF:

0.00000832

AC:

AN:

1082132

Other (OTH)

AF:

0.00

AC:

AN:

57820

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.511

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:

0.0000531

AC:

AN:

150626

Hom.:

Cov.:

AF XY:

0.0000408

AC XY:

AN XY:

73544

show subpopulations

African (AFR)

AF:

0.000171

AC:

AN:

40916

American (AMR)

AF:

0.00

AC:

AN:

15164

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3448

East Asian (EAS)

AF:

0.00

AC:

AN:

5088

South Asian (SAS)

AF:

0.00

AC:

AN:

4796

European-Finnish (FIN)

AF:

0.0000969

AC:

AN:

10320

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67616

Other (OTH)

AF:

0.00

AC:

AN:

2064

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.550

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:

0.0000604

Hom.:

Bravo

AF:

0.0000529

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:1

May 03, 2023

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

Jan 30, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 829 of the RECQL4 protein (p.Arg829Cys). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. 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: 528995). 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 not expected to disrupt RECQL4 protein function with a negative 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

Benign

0.11

BayesDel_addAF

Uncertain

0.077

BayesDel_noAF

Benign

-0.13

CADD

Uncertain

(source)

DANN

Benign

0.82

DEOGEN2

Benign

0.15

T;T

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.91

D;D

M_CAP

Benign

0.026

MetaRNN

Benign

0.37

T;T

MutationAssessor

Uncertain

2.8

.;M

PhyloP100

1.3

PrimateAI

Uncertain

0.57

Sift4G

Pathogenic

0.0

D;D

Polyphen

0.99

.;D

Vest4

0.43

MVP

0.61

GERP RS

2.3

PromoterAI

-0.034

Neutral

(source)

Varity_R

0.25

gMVP

0.76

Mutation Taster

=61/39

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over