8-144513103-G-C

Variant names:

• chr8-144513103-G-C
• NM_004260.4:c.2499C>G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_004260.4(RECQL4):​c.2499C>G​(p.His833Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000211 in 1,420,994 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: RECQL4 NM_004260.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.705

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]

ENSG00000265393 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RECQL4	NM_004260.4	c.2499C>G	p.His833Gln	missense_variant	Exon 15 of 21	ENST00000617875.6	NP_004251.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RECQL4	ENST00000617875.6	c.2499C>G	p.His833Gln	missense_variant	Exon 15 of 21	1	NM_004260.4	ENSP00000482313.2
RECQL4	ENST00000621189.4	c.1428C>G	p.His476Gln	missense_variant	Exon 14 of 20	1		ENSP00000483145.1
RECQL4	ENST00000534626.6	c.669C>G	p.His223Gln	missense_variant	Exon 6 of 8	5		ENSP00000477457.1
ENSG00000265393	ENST00000580385.1	n.271+266G>C		intron_variant	Intron 1 of 1	3

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 0.00000211 AC: 3 AN: 1420994 Hom.: 0 Cov.: 66 AF XY: 0.00000428 AC XY: 3 AN XY: 701558

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000258

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.0000200

Gnomad4 NFE exome AF: 9.18e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 34

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Baller-Gerold syndrome Uncertain:1

Aug 18, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces histidine, which is basic and polar, with glutamine, which is neutral and polar, at codon 833 of the RECQL4 protein (p.His833Gln). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with RECQL4-related conditions. 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
AlphaMissense	Uncertain	0.49
BayesDel_addAF	Benign	-0.051	T
BayesDel_noAF	Benign	-0.31
CADD	Benign	0.016
DANN	Benign	0.58
DEOGEN2	Benign	0.076	T;T
FATHMM_MKL	Benign	0.35	N
LIST_S2	Uncertain	0.88	D;D
M_CAP	Benign	0.057	D
MetaRNN	Uncertain	0.52	D;D
MutationAssessor	Benign	0.95	.;L
PrimateAI	Uncertain	0.49	T
Sift4G	Uncertain	0.027	D;D
Polyphen		0.99	.;D
Vest4		0.55
MVP		0.67
GERP RS		-9.3
Varity_R		0.075
gMVP		0.53

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr8-145738486;