8-144516019-C-G

Variant names:

• chr8-144516019-C-G
• rs766344677
• NM_004260.4:c.1100G>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_004260.4(RECQL4):​c.1100G>C​(p.Arg367Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000412 in 1,457,838 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. R367W) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: RECQL4 NM_004260.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.579
• 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, 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

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.079276174).

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RECQL4	NM_004260.4	MANE Select	c.1100G>C	p.Arg367Pro	missense	Exon 5 of 21	NP_004251.4
	RECQL4	NM_001413019.1		c.1100G>C	p.Arg367Pro	missense	Exon 5 of 20	NP_001399948.1
	RECQL4	NM_001413036.1		c.1100G>C	p.Arg367Pro	missense	Exon 5 of 21	NP_001399965.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RECQL4	ENST00000617875.6	TSL:1 MANE Select	c.1100G>C	p.Arg367Pro	missense	Exon 5 of 21	ENSP00000482313.2
	RECQL4	ENST00000621189.4	TSL:1	c.29G>C	p.Arg10Pro	missense	Exon 4 of 20	ENSP00000483145.1
	RECQL4	ENST00000524998.1	TSL:3	c.620G>C	p.Arg207Pro	missense	Exon 3 of 4	ENSP00000476579.1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD2 exomes AF: 0.0000121 AC: 3 AN: 247036 AF XY: 0.00000743

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000412 AC: 6 AN: 1457838 Hom.: 0 Cov.: 66 AF XY: 0.00000276 AC XY: 2 AN XY: 724642

African (AFR) AF: 0.0000299 AC: 1 AN: 33430

American (AMR) AF: 0.00 AC: 0 AN: 44660

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26096

East Asian (EAS) AF: 0.00 AC: 0 AN: 39622

South Asian (SAS) AF: 0.0000464 AC: 4 AN: 86206

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51980

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 9.01e-7 AC: 1 AN: 1109844

Other (OTH) AF: 0.00 AC: 0 AN: 60240

GnomAD4 genome Cov.: 34

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ExAC AF: 0.00000828 AC: 1

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.091
BayesDel_addAF	Benign	-0.40	T
BayesDel_noAF	Benign	-0.60
CADD	Benign	3.1
DANN	Benign	0.47
DEOGEN2	Benign	0.027	T
FATHMM_MKL	Benign	0.038	N
LIST_S2	Benign	0.55	T
M_CAP	Benign	0.00090	T
MetaRNN	Benign	0.079	T
PhyloP100		-0.58
PrimateAI	Benign	0.25	T
Sift4G	Benign	0.21	T
Polyphen		0.0010	B
Vest4		0.19
MVP		0.76
GERP RS		-1.3
PromoterAI		0.040	Neutral
Varity_R		0.10
gMVP		0.33
Mutation Taster		=90/10	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

Other links and lift over

dbSNP: rs766344677; hg19: chr8-145741403;