Genetic Variant FANCA:p.Met1? (chr16-89816615-T-G) – ACMG Classification: Pathogenic (20 pts)

Variant summary

Our verdict is Pathogenic. The variant received 20 ACMG points: 20P and 0B. PVS1PS1_ModeratePM2PP5_Very_Strong

The NM_000135.4(FANCA):c.1A>C(p.Met1?) variant causes a initiator codon 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 Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 34)

Exomes 𝑓: 0.0000029 ( 0 hom. )

Consequence

FANCA
NM_000135.4 initiator_codon

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6

Conservation

PhyloP100: 0.666

Publications

15 publications found

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 Gene-Disease associations (from GenCC):

Fanconi anemia complementation group A
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae), ClinGen, G2P, Myriad Women’s Health
Fanconi anemia
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

FANCA links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 20 ACMG points.

PVS1

Start lost variant, next in-frame start position is after 84 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 [Likely_pathogenic] in ClinVar

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/Likely_pathogenic. ClinVar VariationId is 553521.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000135.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
FANCA	NM_000135.4	MANE Select	c.1A>C	p.Met1?	initiator_codon	Exon 1 of 43	NP_000126.2	O15360-1
FANCA	NM_001286167.3		c.1A>C	p.Met1?	initiator_codon	Exon 1 of 43	NP_001273096.1	O15360-3
FANCA	NM_001018112.3		c.1A>C	p.Met1?	initiator_codon	Exon 1 of 11	NP_001018122.1	O15360-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
FANCA	ENST00000389301.8	TSL:1 MANE Select	c.1A>C	p.Met1?	initiator_codon	Exon 1 of 43	ENSP00000373952.3	O15360-1
FANCA	ENST00000563673.5	TSL:1	c.1A>C	p.Met1?	initiator_codon	Exon 1 of 10	ENSP00000456443.1	H3BRX3
FANCA	ENST00000534992.5	TSL:1	c.1A>C	p.Met1?	initiator_codon	Exon 1 of 11	ENSP00000443675.1	F5H8D5

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

GnomAD2 exomes

AF:

0.0000250

AC:

AN:

120082

AF XY:

0.0000300

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 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

African (AFR)

AF:

0.00

AC:

AN:

29092

American (AMR)

AF:

0.0000565

AC:

AN:

35376

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24704

East Asian (EAS)

AF:

0.0000293

AC:

AN:

34160

South Asian (SAS)

AF:

0.0000128

AC:

AN:

77986

European-Finnish (FIN)

AF:

0.00

AC:

AN:

33602

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4276

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1075636

Other (OTH)

AF:

0.00

AC:

AN:

57228

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000658

AC:

AN:

152024

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74278

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41422

American (AMR)

AF:

0.00

AC:

AN:

15278

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5164

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10578

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67964

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.0000107

AC:

ClinVar

ClinVar submissions

Significance:Pathogenic/Likely pathogenic

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Fanconi anemia complementation group A (3)

not provided (2)

Fanconi anemia (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.22

BayesDel_noAF

Pathogenic

0.27

CADD

Benign

(source)

DANN

Benign

0.72

DEOGEN2

Benign

0.072

Eigen

Benign

-0.63

Eigen_PC

Benign

-0.64

FATHMM_MKL

Uncertain

0.89

LIST_S2

Uncertain

0.90

M_CAP

Pathogenic

0.99

MetaRNN

Pathogenic

0.99

MetaSVM

Benign

-0.47

PhyloP100

0.67

PROVEAN

Benign

-0.80

REVEL

Uncertain

0.32

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

0.064

Vest4

0.77

MutPred

1.0

Loss of phosphorylation at S2 (P = 0.1776)

MVP

0.86

ClinPred

0.96

GERP RS

3.1

PromoterAI

-0.14

Neutral

(source)

Varity_R

0.94

gMVP

0.15

Mutation Taster

=2/198

disease causing (ClinVar)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over