rs540805431

Positions:

chr3-10065867-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 3P and 3B. PM2PP3BP4_ModerateBP6

The NM_001018115.3(FANCD2):c.2273G>C(p.Cys758Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000203 in 1,598,698 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00018 ( 1 hom. )

Consequence

FANCD2
NM_001018115.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:3

Conservation

PhyloP100: 9.71

Variant links:

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]

FANCD2 links:

FANCD2 (HGNC:):

FANCD2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

Multiple lines of computational evidence support a deleterious effect 6: BayesDel_noAF, Cadd, Eigen, phyloP100way_vertebrate, PROVEAN, REVEL [when max_spliceai, FATHMM_MKL, MetaRNN, MutationTaster was below the threshold]

BP4

Computational evidence support a benign effect (MetaRNN=0.22732523).

BP6

Variant 3-10065867-G-C is Benign according to our data. Variant chr3-10065867-G-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 456351.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=4}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FANCD2	NM_001018115.3 linkuse as main transcript	c.2273G>C	p.Cys758Ser	missense_variant	25/44	ENST00000675286.1	NP_001018125.1	Q9BXW9-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FANCD2	ENST00000675286.1 linkuse as main transcript	c.2273G>C	p.Cys758Ser	missense_variant	25/44		NM_001018115.3	ENSP00000502379.1		Q9BXW9-2

Frequencies

GnomAD3 genomes

AF:

0.000388

AC:

AN:

152156

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00282

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000220

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000530

AC:

133

AN:

251082

Hom.:

AF XY:

0.000457

AC XY:

AN XY:

135698

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00327

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:

0.000115

Gnomad OTH exome

AF:

0.000978

GnomAD4 exome

AF:

0.000184

AC:

266

AN:

1446424

Hom.:

Cov.:

AF XY:

0.000160

AC XY:

115

AN XY:

720758

show subpopulations

Gnomad4 AFR exome

AF:

0.0000905

Gnomad4 AMR exome

AF:

0.00309

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:

0.000103

Gnomad4 OTH exome

AF:

0.000200

GnomAD4 genome

AF:

0.000387

AC:

AN:

152274

Hom.:

Cov.:

AF XY:

0.000510

AC XY:

AN XY:

74442

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00281

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000221

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000158

Hom.:

Bravo

AF:

0.000529

ExAC

AF:

0.000346

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Jun 09, 2022	Variant summary: FANCD2 c.2273G>C (p.Cys758Ser) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 0.00053 in 251082 control chromosomes, predominantly at a frequency of 0.0033 within the Latino subpopulation in the gnomAD database, including 1 homozygote. The observed variant frequency within Latino control individuals in the gnomAD database is approximately 6.82 fold of the estimated maximal expected allele frequency for a pathogenic variant in FANCD2 causing Fanconi Anemia phenotype (0.00048), strongly suggesting that the variant is a benign polymorphism found primarily in populations of Latino origin. c.2273G>C has been reported in the literature in settings of multigene panel testing for head and neck squamous cell carcinoma (HNSCC) and breast cancer without strong evidence for causality (example Chandrasekharappa_2017, Bonache_2018). To our knowledge no individuals with the variant affected with Fanconi Anemia and no experimental evidence demonstrating an impact on protein function has been reported. Three clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Two laboratories classified the variant as VUS and one as likely benign. Based on the evidence outlined above, the variant was classified as likely benign. -
Uncertain significance, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Jan 04, 2021	This sequence change has been previously described in a patient cohort with head and neck squamous cell carcinoma (HNSCC); no other details were provided (PMID: 28678401). This sequence change has been described in the gnomAD database with a relatively higher population frequency of 0.33% in the Latino subpoulation (dbSNP rs540805431). The p.Cys758Ser change affects a highly conserved amino acid residue located in a domain of the FANCD2 protein that is not known to be functional. In-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL) provide contradictory results for the p.Cys758Ser substitution. Due to these contrasting evidences and the lack of functional studies, the clinical significance of the p.Cys758Ser change remains unknown at this time. -

Fanconi anemia

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	curation	Sema4, Sema4	Mar 09, 2022	- -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2024	- -

Fanconi anemia complementation group D2

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Baylor Genetics

Jul 05, 2019

This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Jul 31, 2022

Identified in an individual with head and neck squamous cell carcinoma and in a cohort of probands from families with high breast cancer risk, however, detailed clinical information was not provided (Chandrasekharappa et al., 2017; Bonache et al., 2018); Identified as heterozygous in a patient with hepatoblastoma, multiple congenital anomalies, and developmental delay. Patient also reported to have multiple additional variants in known/candidate cancer predisposition genes (Aguiar et al., 2022).; In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 28678401, 30306255, 35495172) -

Hepatoblastoma

Uncertain:1

Uncertain significance, no assertion criteria provided

research

Molecular Oncology - Human Genetics Lab, University of Sao Paulo

- -

FANCD2-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jun 13, 2023

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.55

BayesDel_addAF

Uncertain

0.036

BayesDel_noAF

Pathogenic

0.28

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.46

.;T;T

Eigen

Pathogenic

0.96

Eigen_PC

Pathogenic

0.93

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.88

D;D;.

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.23

T;T;T

MetaSVM

Uncertain

-0.097

MutationAssessor

Uncertain

2.8

M;M;M

PrimateAI

Uncertain

0.59

PROVEAN

Pathogenic

-8.4

D;D;D

REVEL

Pathogenic

0.77

Sift

Pathogenic

0.0

D;D;D

Sift4G

Pathogenic

0.0

D;D;D

Polyphen

1.0

.;D;D

Vest4

0.95

MutPred

0.73

Gain of helix (P = 0.0199);Gain of helix (P = 0.0199);Gain of helix (P = 0.0199);

MVP

0.92

MPC

0.70

ClinPred

0.22

GERP RS

5.7

Varity_R

0.96

gMVP

0.76

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over