16-89816615-T-G

Position:

chr16-89816615-T-G

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>C(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 0.00000328 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 0.0000066 ( 0 hom., cov: 34)

Exomes 𝑓: 0.0000029 ( 0 hom. )

Consequence

FANCA
NM_000135.4 start_lost

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:4

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, no new inframe start found.

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-G is Pathogenic according to our data. Variant chr16-89816615-T-G is described in ClinVar as [Pathogenic]. Clinvar id is 553521.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-89816615-T-G is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
FANCA	NM_000135.4 linkuse as main transcript	c.1A>C	p.Met1?	start_lost	1/43	ENST00000389301.8	NP_000126.2
FANCA	NM_001286167.3 linkuse as main transcript	c.1A>C	p.Met1?	start_lost	1/43		NP_001273096.1
FANCA	NM_001018112.3 linkuse as main transcript	c.1A>C	p.Met1?	start_lost	1/11		NP_001018122.1
FANCA	NM_001351830.2 linkuse as main transcript	c.1A>C	p.Met1?	start_lost	1/10		NP_001338759.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FANCA	ENST00000389301.8 linkuse as main transcript	c.1A>C	p.Met1?	start_lost	1/43	1	NM_000135.4	ENSP00000373952	P1	O15360-1

Frequencies

GnomAD3 genomes

AF:

0.00000658

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000250

AC:

AN:

120082

Hom.:

AF XY:

0.0000300

AC XY:

AN XY:

66718

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000858

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000475

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000292

AC:

AN:

1372060

Hom.:

Cov.:

AF XY:

0.00000295

AC XY:

AN XY:

677814

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000565

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000293

Gnomad4 SAS exome

AF:

0.0000128

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000658

AC:

AN:

152024

Hom.:

Cov.:

AF XY:

0.0000135

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:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ExAC

AF:

0.0000107

AC:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Fanconi anemia complementation group A

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Nov 16, 2021	NM_000135.2(FANCA):c.1A>C(M1?) is an initiation codon variant classified as pathogenic in the context of Fanconi anemia complementation group A. M1? has been observed in cases with relevant disease (PMID: 29098742). Functional assessments of this variant are not available in the literature. M1? has been observed in population frequency databases (gnomAD: AMR 0.01%). In summary, NM_000135.2(FANCA):c.1A>C(M1?) is an initiation codon variant in a gene where loss of function is a known mechanism of disease and is predicted to disrupt protein function. Please note: this variant was assessed in the context of healthy population screening. -
Likely pathogenic, no assertion criteria provided	curation	Leiden Open Variation Database	Feb 28, 2020	Curator: Arleen D. Auerbach. Submitter to LOVD: Sue Richards. -

Fanconi anemia

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 26, 2023

This sequence change affects the initiator methionine of the FANCA mRNA. The next in-frame methionine is located at codon 116. This variant is present in population databases (rs772751654, gnomAD 0.009%). Disruption of the initiator codon has been observed in individuals with Fanconi anemia (PMID: 10090479, 15643609, 16084127, 23898106, 24584348). ClinVar contains an entry for this variant (Variation ID: 553521). For these reasons, this variant has been classified as Pathogenic. -

not provided

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Dec 21, 2023

Identified in patients with Fanconi anemia who also possessed another FANCA variant (PMID: 29098742); 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: 10090479, 16084127, 24584348, 23898106, 29625052, 15643609, 29098742, 30031030, 30792206, 36451132) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.22

BayesDel_noAF

Pathogenic

0.27

CADD

Benign

DANN

Benign

0.72

DEOGEN2

Benign

0.072

T;.;.;T;T;.

Eigen

Benign

-0.63

Eigen_PC

Benign

-0.64

FATHMM_MKL

Uncertain

0.89

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

-0.47

MutationTaster

Benign

1.0

D;D;D;D

PROVEAN

Benign

-0.80

N;N;N;N;N;N

REVEL

Uncertain

0.32

Sift

Pathogenic

0.0

D;D;D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D;D;D

Polyphen

0.064

B;.;.;.;B;B

Vest4

0.77

MutPred

1.0

Loss of phosphorylation at S2 (P = 0.1776);Loss of phosphorylation at S2 (P = 0.1776);Loss of phosphorylation at S2 (P = 0.1776);Loss of phosphorylation at S2 (P = 0.1776);Loss of phosphorylation at S2 (P = 0.1776);Loss of phosphorylation at S2 (P = 0.1776);

MVP

0.86

ClinPred

0.96

GERP RS

3.1

Varity_R

0.94

gMVP

0.15

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