NM_000135.4:c.1A>G

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 20 ACMG points: 20P and 0B. PVS1PS1_ModeratePM2PP5_Very_Strong

The NM_000135.4(FANCA):c.1A>G(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000171 in 1,524,084 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 Pathogenic (★★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

FANCA
NM_000135.4 start_lost

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:9

Conservation

PhyloP100: 0.666

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 20 ACMG points.

PVS1

Start lost variant, next in-frame start position is after 21 pathogenic variants. Next in-frame start position is after 116 codons. Genomic position: 89811009. Lost 0.079 part of the original CDS.

PS1

Another start lost variant in NM_000135.4 (FANCA) was described as [Pathogenic] in Lovd

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 16-89816615-T-C is Pathogenic according to our data. Variant chr16-89816615-T-C is described in ClinVar as [Pathogenic]. Clinvar id is 435134.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-89816615-T-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FANCA	NM_000135.4 link	c.1A>G	p.Met1?	start_lost	Exon 1 of 43	ENST00000389301.8	NP_000126.2	O15360-1
FANCA	NM_001286167.3 link	c.1A>G	p.Met1?	start_lost	Exon 1 of 43		NP_001273096.1	O15360-3
FANCA	NM_001018112.3 link	c.1A>G	p.Met1?	start_lost	Exon 1 of 11		NP_001018122.1	O15360-2
FANCA	NM_001351830.2 link	c.1A>G	p.Met1?	start_lost	Exon 1 of 10		NP_001338759.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FANCA	ENST00000389301.8 link	c.1A>G	p.Met1?	start_lost	Exon 1 of 43	1	NM_000135.4	ENSP00000373952.3		O15360-1

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

152024

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000167

AC:

AN:

120082

Hom.:

AF XY:

0.0000150

AC XY:

AN XY:

66718

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000429

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:

0.0000213

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000175

AC:

AN:

1372060

Hom.:

Cov.:

AF XY:

0.0000221

AC XY:

AN XY:

677814

show subpopulations

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:

0.0000214

Gnomad4 OTH exome

AF:

0.0000175

GnomAD4 genome

AF:

0.0000132

AC:

AN:

152024

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74278

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:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:9

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Fanconi anemia complementation group A

Pathogenic:6

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 24, 2017

Counsyl

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Nov 11, 2016

Genetic Services Laboratory, University of Chicago

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 28, 2020

Leiden Open Variation Database

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: curation

Curator: Arleen D. Auerbach. Submitters to LOVD: Arleen D. Auerbach, Sue Richards. -

Feb 01, 2024

3billion

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The variant is observed at an extremely low frequency in the gnomAD v2.1.1 dataset (total allele frequency: 0.002%). Predicted Consequence/Location: Start-lost: reinitiation of translation may occur at a downstream alternate start codon but still result in a loss or disruption of normal protein function as there have been pathogenic variants reported upstream of the alternate start codon. The variant has been reported at least twice as pathogenic with clinical assertions and evidence for the classification (ClinVar ID: VCV000435134 /PMID: 10090479). Therefore, this variant is classified as Likely pathogenic according to the recommendation of ACMG/AMP guideline. -

Jun 11, 2021

Revvity Omics, Revvity

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Fanconi anemia

Pathogenic:2

Oct 24, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change affects the initiator methionine of the FANCA mRNA. The next in-frame methionine is located at codon 116. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. Disruption of the initiator codon has been observed in individuals with Fanconi anemia (PMID: 10090479, 15643609, 16084127, 22778927, 23898106, 24584348). ClinVar contains an entry for this variant (Variation ID: 435134). For these reasons, this variant has been classified as Pathogenic. -

Apr 28, 2021

Natera, Inc.

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

not provided

Pathogenic:1

Jul 05, 2023

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Initiation codon variant in a gene for which loss of function is a known mechanism of disease; This variant is associated with the following publications: (PMID: 28104920, 10090479, 30031030, 15643609, 30792206) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.29

BayesDel_noAF

Pathogenic

0.31

CADD

Benign

DANN

Benign

0.78

DEOGEN2

Benign

0.075

T;.;.;T;T;.

Eigen

Benign

-0.44

Eigen_PC

Benign

-0.50

FATHMM_MKL

Uncertain

0.86

LIST_S2

Uncertain

0.90

D;D;D;D;D;D

M_CAP

Pathogenic

0.99

MetaRNN

Pathogenic

0.99

D;D;D;D;D;D

MetaSVM

Benign

-0.39

PROVEAN

Benign

-1.0

N;N;N;N;N;N

REVEL

Uncertain

0.37

Sift

Pathogenic

0.0

D;D;D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D;D;D

Polyphen

0.47

P;.;.;.;P;P

Vest4

0.71

MutPred

1.0

Loss of phosphorylation at S4 (P = 0.2493);Loss of phosphorylation at S4 (P = 0.2493);Loss of phosphorylation at S4 (P = 0.2493);Loss of phosphorylation at S4 (P = 0.2493);Loss of phosphorylation at S4 (P = 0.2493);Loss of phosphorylation at S4 (P = 0.2493);

MVP

0.88

ClinPred

0.96

GERP RS

3.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.92

gMVP

0.21

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