Genetic Variant RECQL4:p.Gly131Ala (chr8-144516727-C-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

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

The NM_004260.4(RECQL4):c.392G>C(p.Gly131Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000723 in 1,382,928 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 10/13 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G131R) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 34)

Exomes 𝑓: 7.2e-7 ( 0 hom. )

Consequence

RECQL4
NM_004260.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.678

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:

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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=0.092386305).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RECQL4	NM_004260.4 link	c.392G>C	p.Gly131Ala	missense_variant	Exon 5 of 21	ENST00000617875.6	NP_004251.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RECQL4	ENST00000617875.6 link	c.392G>C	p.Gly131Ala	missense_variant	Exon 5 of 21	1	NM_004260.4	ENSP00000482313.2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

7.23e-7

AC:

AN:

1382928

Hom.:

Cov.:

AF XY:

0.00000147

AC XY:

AN XY:

680114

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

30782

American (AMR)

AF:

0.00

AC:

AN:

32762

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

20754

East Asian (EAS)

AF:

0.00

AC:

AN:

39154

South Asian (SAS)

AF:

0.00

AC:

AN:

72284

European-Finnish (FIN)

AF:

0.00

AC:

AN:

48640

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5356

European-Non Finnish (NFE)

AF:

9.29e-7

AC:

AN:

1076318

Other (OTH)

AF:

0.00

AC:

AN:

56878

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

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.087

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.59

CADD

Benign

0.046

(source)

DANN

Benign

0.50

DEOGEN2

Benign

0.030

FATHMM_MKL

Benign

0.053

LIST_S2

Benign

0.39

M_CAP

Benign

0.0033

MetaRNN

Benign

0.092

PhyloP100

-0.68

PrimateAI

Benign

0.24

Sift4G

Benign

0.75

Polyphen

0.43

Vest4

0.15

MVP

0.69

GERP RS

-4.9

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.1

Varity_R

0.021

gMVP

0.24

Mutation Taster

=95/5

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.070

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over