rs146975341

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_000135.4(FANCA):c.3848A>G(p.Lys1283Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000211 in 1,614,058 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K1283N) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00017 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00021 ( 0 hom. )

Consequence

FANCA
NM_000135.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:1

Conservation

PhyloP100: -0.117

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 Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.19298747).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FANCA	NM_000135.4 linkuse as main transcript	c.3848A>G	p.Lys1283Arg	missense_variant	39/43	ENST00000389301.8
ZNF276	NM_001113525.2 linkuse as main transcript	c.*1834T>C		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.3848A>G	p.Lys1283Arg	missense_variant	39/43	1	NM_000135.4	P1	O15360-1
ZNF276	ENST00000443381.7 linkuse as main transcript	c.*1834T>C		3_prime_UTR_variant	11/11	1	NM_001113525.2	P2	Q8N554-1

Frequencies

GnomAD3 genomes

AF:

0.000171

AC:

AN:

152206

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:

0.000367

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000716

AC:

AN:

251494

Hom.:

AF XY:

0.0000662

AC XY:

AN XY:

135922

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

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:

0.000149

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000215

AC:

314

AN:

1461852

Hom.:

Cov.:

AF XY:

0.000198

AC XY:

144

AN XY:

727230

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

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:

0.000274

Gnomad4 OTH exome

AF:

0.000132

GnomAD4 genome

AF:

0.000171

AC:

AN:

152206

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

AN XY:

74356

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:

0.000367

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000247

Hom.:

Bravo

AF:

0.000144

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.0000741

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Fanconi anemia complementation group A

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	St. Jude Molecular Pathology, St. Jude Children's Research Hospital	Feb 17, 2022	The FANCA c.3848A>G (p.Lys1283Arg) missense change has a maximum subpopulation frequency of 0.017% in gnomAD v2.1.1 ( https://gnomad.broadinstitute.org/variant/16-89806488-T-C ). Six of seven in silico tools predict a benign effect of this variant on protein function (BP4), but to our knowledge these predictions have not been confirmed by functional studies. To our knowledge, this variant has not been reported in individuals with Fanconi anemia. In summary, this variant meets criteria to be classified as of uncertain significance based on the ACMG/AMP criteria: BP4. -
Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 16, 2020	- -

Fanconi anemia

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	St. Jude Molecular Pathology, St. Jude Children's Research Hospital	Jul 29, 2021	The FANCA c.3848A>G (p.Lys1283Arg) missense change has a maximum subpopulation frequency of 0.017% in gnomAD v2.1.1 (https://gnomad.broadinstitute.org/variant/16-89806488-T-C). Six of seven in silico tools predict a benign effect of this variant on protein function (BP4), but to our knowledge these predictions have not been confirmed by functional studies. To our knowledge, this variant has not been reported in individuals with Fanconi anemia. In summary, this variant meets criteria to be classified as of uncertain significance based on the ACMG/AMP criteria: BP4. -
Likely benign, criteria provided, single submitter	clinical testing	Invitae	Jan 16, 2024	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 11, 2021

The c.3848A>G (p.K1283R) alteration is located in exon 39 (coding exon 39) of the FANCA gene. This alteration results from a A to G substitution at nucleotide position 3848, causing the lysine (K) at amino acid position 1283 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.077

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.31

Cadd

Benign

1.2

Dann

Benign

0.84

DEOGEN2

Benign

0.15

T;.;.

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.43

LIST_S2

Benign

0.43

T;T;T

M_CAP

Benign

0.057

MetaRNN

Benign

0.19

T;T;T

MetaSVM

Benign

-0.89

MutationAssessor

Benign

1.8

L;L;.

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.30

PROVEAN

Benign

-0.99

N;N;N

REVEL

Benign

0.16

Sift

Benign

0.31

T;T;T

Sift4G

Benign

0.31

T;T;T

Polyphen

0.012

B;.;.

Vest4

0.11

MVP

0.85

ClinPred

0.035

GERP RS

-1.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.053

gMVP

0.11

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.090

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