Genetic Variant RECQL4:p.Arg5_Leu11del (chr8-144517750-TGCAGCCGCTCCCGCACGTCCC-T) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PM4

The NM_004260.4(RECQL4):c.14_34delGGGACGTGCGGGAGCGGCTGC(p.Arg5_Leu11del) variant causes a disruptive inframe deletion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000369 in 1,328,328 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000041 ( 0 hom. )

Consequence

RECQL4
NM_004260.4 disruptive_inframe_deletion

Scores

Not classified

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.27

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 links:

LRRC14 (HGNC:20419): (leucine rich repeat containing 14) This gene encodes a leucine-rich repeat-containing protein. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Dec 2012]

LRRC14 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM4

Nonframeshift variant in NON repetitive region in NM_004260.4.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RECQL4	NM_004260.4 link	c.14_34delGGGACGTGCGGGAGCGGCTGC	p.Arg5_Leu11del	disruptive_inframe_deletion	Exon 1 of 21	ENST00000617875.6	NP_004251.4	O94761
LRRC14	NM_014665.4 link	c.-402_-382delGCAGCCGCTCCCGCACGTCCC		upstream_gene_variant		ENST00000292524.6	NP_055480.1	Q15048

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RECQL4	ENST00000617875.6 link	c.14_34delGGGACGTGCGGGAGCGGCTGC	p.Arg5_Leu11del	disruptive_inframe_deletion	Exon 1 of 21	1	NM_004260.4	ENSP00000482313.2		O94761
LRRC14	ENST00000292524.6 link	c.-402_-382delGCAGCCGCTCCCGCACGTCCC		upstream_gene_variant		1	NM_014665.4	ENSP00000292524.1		Q15048

Frequencies

GnomAD3 genomes

AF:

0.00000663

AC:

AN:

150744

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000284

AC:

AN:

35252

Hom.:

AF XY:

0.00

AC XY:

AN XY:

21366

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000754

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000408

AC:

AN:

1177584

Hom.:

AF XY:

0.0000331

AC XY:

AN XY:

574186

show subpopulations

Gnomad4 AFR exome

AF:

0.0000426

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000207

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000454

Gnomad4 OTH exome

AF:

0.0000425

GnomAD4 genome

AF:

0.00000663

AC:

AN:

150744

Hom.:

Cov.:

AF XY:

0.0000136

AC XY:

AN XY:

73574

show subpopulations

Gnomad4 AFR

AF:

0.0000242

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Baller-Gerold syndrome

Uncertain:1

Jul 15, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant, c.14_34del, results in the deletion of 7 amino acid(s) of the RECQL4 protein (p.Arg5_Leu11del), but otherwise preserves the integrity of the reading frame. This variant is present in population databases (no rsID available, gnomAD 0.007%). 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: 643816). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. 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

Splicing

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over