rs753700179

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM2PP3_ModeratePP5_Very_Strong

The NM_000135.4(FANCA):c.3913C>T(p.Leu1305Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000372 in 1,614,074 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 Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

FANCA
NM_000135.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:8

Conservation

PhyloP100: 1.92

Variant links:

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 links:

ZNF276 (HGNC:23330): (zinc finger protein 276) Enables sequence-specific double-stranded DNA binding activity. Predicted to be involved in regulation of transcription by RNA polymerase II. Located in kinetochore. [provided by Alliance of Genome Resources, Apr 2022]

ZNF276 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.847

PP5

Variant 16-89740015-G-A is Pathogenic according to our data. Variant chr16-89740015-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 556224.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-89740015-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FANCA	NM_000135.4 linkuse as main transcript	c.3913C>T	p.Leu1305Phe	missense_variant	39/43	ENST00000389301.8
ZNF276	NM_001113525.2 linkuse as main transcript	c.*1769G>A		3_prime_UTR_variant	11/11	ENST00000443381.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FANCA	ENST00000389301.8 linkuse as main transcript	c.3913C>T	p.Leu1305Phe	missense_variant	39/43	1	NM_000135.4	P1	O15360-1
ZNF276	ENST00000443381.7 linkuse as main transcript	c.*1769G>A		3_prime_UTR_variant	11/11	1	NM_001113525.2	P2	Q8N554-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152210

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251474

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135908

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461864

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727226

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152210

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74354

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000478

Bravo

AF:

0.00000756

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Fanconi anemia complementation group A

Pathogenic:5

Pathogenic, no assertion criteria provided	literature only	OMIM	Jan 11, 2022	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jan 31, 2019	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Counsyl	Jan 23, 2018	- -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Sep 21, 2023	- -
Pathogenic, no assertion criteria provided	curation	Leiden Open Variation Database	Feb 28, 2020	Curator: Arleen D. Auerbach. Submitter to LOVD: Arleen D. Auerbach. -

Fanconi anemia

Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Nov 25, 2022	Variant summary: FANCA c.3913C>T (p.Leu1305Phe) 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 1.2e-05 in 251474 control chromosomes (gnomAD). c.3913C>T has been reported in the literature as a biallelic genotype in individuals affected with Fanconi Anemia (e.g. Pinto_2009, Castella_2011, Bogliolo_2020). These data indicate that the variant is likely to be associated with disease. Experimental evidence evaluating the variants ability to rescue FANCD2 monoubiquitination and resistance to Mitomycin-C showed the variant had similar activity to a known null variant/negative control (Bogliolo_2020). Six ClinVar submitters have assessed the variant since 2014: three classified the variant as likely pathogenic and three as pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. -
Likely pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 03, 2020	- -
Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Sep 14, 2023	This sequence change replaces leucine, which is neutral and non-polar, with phenylalanine, which is neutral and non-polar, at codon 1305 of the FANCA protein (p.Leu1305Phe). This variant is present in population databases (rs753700179, gnomAD 0.007%). This missense change has been observed in individual(s) with Fanconi anemia (PMID: 19278965, 21273304, 29098742, 29904161, 31586946). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 556224). 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 expected to disrupt FANCA protein function. Experimental studies have shown that this missense change affects FANCA function (PMID: 31586946). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.22

BayesDel_addAF

Uncertain

0.060

BayesDel_noAF

Uncertain

0.030

Cadd

Benign

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.55

D;.;D;.

Eigen

Benign

0.060

Eigen_PC

Benign

-0.082

FATHMM_MKL

Uncertain

0.95

LIST_S2

Benign

0.71

T;T;T;T

M_CAP

Uncertain

0.19

MetaRNN

Pathogenic

0.85

D;D;D;D

MetaSVM

Uncertain

0.22

MutationAssessor

Uncertain

2.3

M;M;.;.

MutationTaster

Benign

0.94

D;D;D

PrimateAI

Benign

0.38

PROVEAN

Benign

-2.1

N;N;D;N

REVEL

Pathogenic

0.67

Sift

Benign

0.043

D;D;T;T

Sift4G

Benign

0.072

T;T;D;D

Polyphen

1.0

D;.;.;.

Vest4

0.66

MutPred

0.78

Loss of stability (P = 0.2195);Loss of stability (P = 0.2195);.;.;

MVP

0.93

ClinPred

0.64

GERP RS

2.3

Varity_R

0.065

gMVP

0.34

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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