rs1555538571

Positions:

• chr16-89749730-C-A
• chr16-89749730-C-T

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2 PM5 PP3_Moderate PP5

The NM_000135.4(FANCA):​c.3239G>T​(p.Arg1080Leu) variant causes a missense, splice region change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1080Q) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: FANCA NM_000135.4 missense, splice_region
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 3.70

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]

FANCA (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr16-89749730-C-T is described in Lovd as [Pathogenic].
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.85
• PP5: Variant 16-89749730-C-A is Pathogenic according to our data. Variant chr16-89749730-C-A is described in ClinVar as [Pathogenic]. Clinvar id is 974259.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr16-89749730-C-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FANCA	NM_000135.4	c.3239G>T	p.Arg1080Leu	missense_variant, splice_region_variant	32/43	ENST00000389301.8	NP_000126.2
FANCA	NM_001286167.3	c.3239G>T	p.Arg1080Leu	missense_variant, splice_region_variant	32/43		NP_001273096.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FANCA	ENST00000389301.8	c.3239G>T	p.Arg1080Leu	missense_variant, splice_region_variant	32/43	1	NM_000135.4	ENSP00000373952.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Fanconi anemia complementation group A Pathogenic:1

Pathogenic, no assertion criteria provided

curation

Leiden Open Variation Database

Feb 28, 2020

Curator: Arleen D. Auerbach. Submitter to LOVD: Arleen D. Auerbach. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.33
BayesDel_addAF	Uncertain	0.12	D
BayesDel_noAF	Uncertain	-0.070
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.68	D;.
Eigen	Uncertain	0.31
Eigen_PC	Benign	0.21
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.84	T;T
M_CAP	Pathogenic	0.78	D
MetaRNN	Pathogenic	0.85	D;D
MetaSVM	Uncertain	0.47	D
MutationAssessor	Benign	2.0	M;M
PrimateAI	Benign	0.30	T
PROVEAN	Pathogenic	-4.6	D;D
REVEL	Uncertain	0.63
Sift	Uncertain	0.0090	D;D
Sift4G	Uncertain	0.028	D;D
Polyphen		0.98	D;.
Vest4		0.56
MutPred		0.61		Loss of MoRF binding (P = 9e-04);Loss of MoRF binding (P = 9e-04);
MVP		0.95
ClinPred		0.97	D
GERP RS		4.2
Varity_R		0.46
gMVP		0.68

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.98
SpliceAI score (max)		0.82		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.82		Position offset: 0

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

Publications

LitVar

Other links and lift over

dbSNP: rs1555538571; hg19: chr16-89816138; COSMIC: COSV59796386; COSMIC: COSV59796386;