chr8-144514968-C-G

Position:

• chr8-144514968-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_004260.4(RECQL4):​c.1588G>C​(p.Val530Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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. V530I) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 34)
• Consequence: RECQL4 NM_004260.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.838

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 3 benign, 15 uncertain in NM_004260.4
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.28877681).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RECQL4	NM_004260.4	c.1588G>C	p.Val530Leu	missense_variant	9/21	ENST00000617875.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RECQL4	ENST00000617875.6	c.1588G>C	p.Val530Leu	missense_variant	9/21	1	NM_004260.4	P1
RECQL4	ENST00000621189.4	c.517G>C	p.Val173Leu	missense_variant	8/20	1
RECQL4	ENST00000532846.2	c.445G>C	p.Val149Leu	missense_variant	5/9	5
RECQL4	ENST00000688394.1	n.611G>C		non_coding_transcript_exon_variant	3/4

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.22
BayesDel_addAF	Benign	0.0037	T
BayesDel_noAF	Benign	-0.23
CADD	Benign	3.8
DANN	Benign	0.75
DEOGEN2	Benign	0.051	T;T
FATHMM_MKL	Benign	0.54	D
LIST_S2	Uncertain	0.91	D;D
M_CAP	Benign	0.0026	T
MetaRNN	Benign	0.29	T;T
PrimateAI	Benign	0.27	T
Sift4G	Uncertain	0.016	D;D
Polyphen		0.43	.;B
Vest4		0.57
MVP		0.28
GERP RS		-2.0
Varity_R		0.26
gMVP		0.48

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr8-145740352;