rs7195066

chr16-89769915-C-Achr16-89769915-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 4P and 4B. PM2 PM5 BP4_Strong

The NM_000135.4(FANCA):c.2426G>T(p.Gly809Val) 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. 15/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G809D) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FANCA NM_000135.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.0770

Genes affected

FANCA (HGNC:3582): (FA complementation group A) 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 A. Alternative splicing results in multiple transcript variants encoding different isoforms. Mutations in this gene are the most common cause of Fanconi anemia. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr16-89769915-C-TCAGT is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2675447.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP4: Computational evidence support a benign effect (MetaRNN=0.05086699).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FANCA	NM_000135.4	c.2426G>T	p.Gly809Val	missense_variant	26/43	ENST00000389301.8
FANCA	NM_001286167.3	c.2426G>T	p.Gly809Val	missense_variant	26/43

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FANCA	ENST00000389301.8	c.2426G>T	p.Gly809Val	missense_variant	26/43	1	NM_000135.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 52

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Fanconi anemia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

May 02, 2023

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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt FANCA protein function. This variant has not been reported in the literature in individuals affected with FANCA-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glycine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 809 of the FANCA protein (p.Gly809Val). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.083
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.46
Cadd	Benign	4.8
Dann	Benign	0.29
DEOGEN2	Benign	0.067	T;.
Eigen	Benign	-1.6
Eigen_PC	Benign	-1.6
FATHMM_MKL	Benign	0.021	N
LIST_S2	Benign	0.14	T;T
M_CAP	Benign	0.046	D
MetaRNN	Benign	0.051	T;T
MetaSVM	Benign	-0.93	T
MutationAssessor	Benign	-0.69	N;N
MutationTaster	Benign	1.0	P;P
PrimateAI	Benign	0.35	T
PROVEAN	Benign	0.0	N;N
REVEL	Benign	0.13
Sift	Benign	0.20	T;T
Sift4G	Benign	0.27	T;T
Polyphen		0.0	B;.
Vest4		0.13
MutPred		0.31		Loss of disorder (P = 0.0317);Loss of disorder (P = 0.0317);
MVP		0.53
ClinPred		0.032	T
GERP RS		-0.17
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.022
gMVP		0.14

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

LitVar

Other links and lift over

dbSNP: rs7195066; hg19: chr16-89836323;