rs767806932

Positions:

• chr3-10090318-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_001018115.3(FANCD2):​c.3710T>C​(p.Val1237Ala) variant causes a missense change. The variant allele was found at a frequency of 0.00000411 in 1,461,524 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: FANCD2 NM_001018115.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: 3.80

Genes affected

FANCD2 (HGNC:3585): (FA complementation group D2) The Fanconi anemia complementation group (FANC) currently includes FANCA, FANCB, FANCC, FANCD1 (also called BRCA2), FANCD2, FANCE, FANCF, FANCG, FANCI, FANCJ (also called BRIP1), FANCL, FANCM and FANCN (also called PALB2). The previously defined group FANCH is the same as FANCA. Fanconi anemia is a genetically heterogeneous recessive disorder characterized by cytogenetic instability, hypersensitivity to DNA crosslinking agents, increased chromosomal breakage, and defective DNA repair. The members of the Fanconi anemia complementation group do not share sequence similarity; they are related by their assembly into a common nuclear protein complex. This gene encodes the protein for complementation group D2. This protein is monoubiquinated in response to DNA damage, resulting in its localization to nuclear foci with other proteins (BRCA1 AND BRCA2) involved in homology-directed DNA repair. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2016]

FANCD2OS (HGNC:28623): (FANCD2 opposite strand) This gene encodes a conserved protein of unknown function. [provided by RefSeq, Jan 2013]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.755

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FANCD2	NM_001018115.3	c.3710T>C	p.Val1237Ala	missense_variant	37/44	ENST00000675286.1	NP_001018125.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FANCD2	ENST00000675286.1	c.3710T>C	p.Val1237Ala	missense_variant	37/44		NM_001018115.3	ENSP00000502379	P2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD3 exomes AF: 0.00000796 AC: 2 AN: 251228 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135800

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: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000411 AC: 6 AN: 1461524 Hom.: 0 Cov.: 31 AF XY: 0.00000550 AC XY: 4 AN XY: 727082

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000540

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ExAC AF: 0.0000165 AC: 2

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

Fanconi anemia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 02, 2021

This sequence change replaces valine with alanine at codon 1237 of the FANCD2 protein (p.Val1237Ala). The valine residue is moderately conserved and there is a small physicochemical difference between valine and alanine. This variant is present in population databases (rs767806932, ExAC 0.003%). This variant has not been reported in the literature in individuals affected with FANCD2-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. 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. -

Hepatoblastoma Uncertain:1

Uncertain significance, no assertion criteria provided

research

Molecular Oncology - Human Genetics Lab, University of Sao Paulo

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.29
BayesDel_addAF	Uncertain	0.027	T
BayesDel_noAF	Benign	-0.18
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.12	.;T;T
Eigen	Benign	0.13
Eigen_PC	Uncertain	0.27
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.90	D;D;.
M_CAP	Benign	0.016	T
MetaRNN	Pathogenic	0.75	D;D;D
MetaSVM	Benign	-0.97	T
MutationAssessor	Uncertain	2.7	M;M;M
MutationTaster	Benign	1.0	D;D;N;N;N
PrimateAI	Uncertain	0.60	T
PROVEAN	Benign	-1.8	N;N;N
REVEL	Benign	0.12
Sift	Benign	0.45	T;T;T
Sift4G	Benign	0.14	T;T;T
Polyphen		0.29	.;B;B
Vest4		0.74
MutPred		0.59		Loss of sheet (P = 0.0063);Loss of sheet (P = 0.0063);Loss of sheet (P = 0.0063);
MVP		0.75
MPC		0.33
ClinPred		0.41	T
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.31
gMVP		0.45

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		Details are displayed if max score is > 0.2

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

Publications

LitVar

Other links and lift over

dbSNP: rs767806932; hg19: chr3-10132002;