NM_004260.4:c.2424C>A

Variant names:

• chr8-144513257-G-T
• NM_004260.4:c.2424C>A
• RECQL4 p.Asp808Glu

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_004260.4(RECQL4):​c.2424C>A​(p.Asp808Glu) 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 pathogenic 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. D808N) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: RECQL4 NM_004260.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.148
• Publications: 0 publications found

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, SUPPORTIVE Submitted by: Orphanet, G2P
• 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, G2P, Genomics England PanelApp
• osteosarcoma

  Inheritance: AR Classification: STRONG Submitted by: Genomics England PanelApp
• rapadilino syndrome

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet
• congenital heart disease

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ENSG00000265393 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.829

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004260.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RECQL4	NM_004260.4	MANE Select	c.2424C>A	p.Asp808Glu	missense	Exon 14 of 21	NP_004251.4	O94761
	RECQL4	NM_001413019.1		c.2424C>A	p.Asp808Glu	missense	Exon 14 of 20	NP_001399948.1
	RECQL4	NM_001413036.1		c.2424C>A	p.Asp808Glu	missense	Exon 14 of 21	NP_001399965.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RECQL4	ENST00000617875.6	TSL:1 MANE Select	c.2424C>A	p.Asp808Glu	missense	Exon 14 of 21	ENSP00000482313.2	O94761
	RECQL4	ENST00000621189.4	TSL:1	c.1353C>A	p.Asp451Glu	missense	Exon 13 of 20	ENSP00000483145.1	A0A087X072
	RECQL4	ENST00000971710.1		c.2331C>A	p.Asp777Glu	missense	Exon 14 of 21	ENSP00000641769.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1439296 Hom.: 0 Cov.: 48 AF XY: 0.00 AC XY: 0 AN XY: 715290

African (AFR) AF: 0.00 AC: 0 AN: 33304

American (AMR) AF: 0.00 AC: 0 AN: 44198

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25934

East Asian (EAS) AF: 0.00 AC: 0 AN: 39378

South Asian (SAS) AF: 0.00 AC: 0 AN: 85644

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 38488

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5530

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1107040

Other (OTH) AF: 0.00 AC: 0 AN: 59780

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.90
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.020
CADD	Benign	17
DANN	Benign	0.88
DEOGEN2	Benign	0.26	T
FATHMM_MKL	Benign	0.23	N
LIST_S2	Pathogenic	0.98	D
M_CAP	Uncertain	0.11	D
MetaRNN	Pathogenic	0.83	D
MutationAssessor	Pathogenic	3.4	M
PhyloP100		-0.15
PrimateAI	Uncertain	0.62	T
Sift4G	Pathogenic	0.0	D
PromoterAI		-0.031	Neutral
Varity_R		0.79
gMVP		0.47
Mutation Taster		=79/21	polymorphism

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr8-145738640;