Genetic Variant ENST00000621189.4:c.-991A>G (chr8-144517639-T-C) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM2BP4_StrongBP6_Moderate

The ENST00000621189.4(RECQL4):c.-991A>G variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000113 in 1,331,286 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 Likely benign (★).

Frequency

Genomes: not found (cov: 34)

Exomes 𝑓: 0.000011 ( 0 hom. )

Consequence

RECQL4
ENST00000621189.4 5_prime_UTR_premature_start_codon_gain

Scores

Splicing: ADA: 0.0002177

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: -0.654

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: Likely_benign. The variant received -4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.82).

BP6

Variant 8-144517639-T-C is Benign according to our data. Variant chr8-144517639-T-C is described in ClinVar as Likely_benign. ClinVar VariationId is 755275.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RECQL4	NM_004260.4 link	c.85-4A>G		splice_region_variant, intron_variant	Intron 1 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.85-4A>G		splice_region_variant, intron_variant	Intron 1 of 20	1	NM_004260.4	ENSP00000482313.2		O94761

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.0000113

AC:

AN:

1331286

Hom.:

Cov.:

AF XY:

0.00000914

AC XY:

AN XY:

656498

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26702

American (AMR)

AF:

0.00

AC:

AN:

28432

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

23488

East Asian (EAS)

AF:

0.00

AC:

AN:

29858

South Asian (SAS)

AF:

0.00

AC:

AN:

73730

European-Finnish (FIN)

AF:

0.00

AC:

AN:

33056

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4102

European-Non Finnish (NFE)

AF:

0.0000132

AC:

AN:

1056654

Other (OTH)

AF:

0.0000181

AC:

AN:

55264

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.512

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:

0.00

Hom.:

Bravo

AF:

0.00000756

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Baller-Gerold syndrome

Benign:1

Aug 24, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.82

CADD

Benign

3.6

(source)

DANN

Benign

0.56

PhyloP100

-0.65

PromoterAI

-0.014

Neutral

(source)

RBP_binding_hub_radar

0.97

RBP_regulation_power_radar

2.1

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00022

dbscSNV1_RF

Benign

0.0020

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

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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