chr16-89808337-G-T

Position:

chr16-89808337-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_000135.4(FANCA):c.553C>A(p.Leu185Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000211 in 1,613,988 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 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. L185V) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000021 ( 1 hom. )

Consequence

FANCA
NM_000135.4 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 2.70

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 Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.33753908).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
FANCA	NM_000135.4 linkuse as main transcript	c.553C>A	p.Leu185Ile	missense_variant	6/43	ENST00000389301.8
FANCA	NM_001286167.3 linkuse as main transcript	c.553C>A	p.Leu185Ile	missense_variant	6/43
FANCA	NM_001018112.3 linkuse as main transcript	c.553C>A	p.Leu185Ile	missense_variant	6/11
FANCA	NM_001351830.2 linkuse as main transcript	c.457C>A	p.Leu153Ile	missense_variant	5/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FANCA	ENST00000389301.8 linkuse as main transcript	c.553C>A	p.Leu185Ile	missense_variant	6/43	1	NM_000135.4	P1	O15360-1

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152106

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

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:

0.00000398

AC:

AN:

251444

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135902

show subpopulations

Gnomad AFR exome

AF:

0.00

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:

0.00

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000212

AC:

AN:

1461882

Hom.:

Cov.:

AF XY:

0.0000316

AC XY:

AN XY:

727242

show subpopulations

Gnomad4 AFR exome

AF:

0.000508

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:

8.99e-7

Gnomad4 OTH exome

AF:

0.000182

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152106

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74278

show subpopulations

Gnomad4 AFR

AF:

0.0000724

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

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000264

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1Other:1

Uncertain significance, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Sep 27, 2019	- -
not provided, no classification provided	reference population	ITMI	Sep 19, 2013	- -

Fanconi anemia complementation group A

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Counsyl

Feb 13, 2018

- -

FANCA-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 17, 2024

The FANCA c.553C>A variant is predicted to result in the amino acid substitution p.Leu185Ile. This variant was reported in a study of germline variation in a healthy, ancestrally diverse cohort (Table S1, Bodian et al. 2014. PubMed ID: 24728327). This variant is reported in 0.0% of alleles in individuals of African descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Quest Diagnostics Nichols Institute San Juan Capistrano

Aug 18, 2023

In the published literature, this variant has been reported in apparently healthy individuals (PMID: 24728327 (2014)). The frequency of this variant in the general population, 0.000004 (1/251444 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is benign. Based on the available information, we are unable to determine the clinical significance of this variant. -

Fanconi anemia

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 05, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.24

BayesDel_addAF

Benign

-0.043

BayesDel_noAF

Benign

-0.30

CADD

Benign

DANN

Benign

0.95

DEOGEN2

Uncertain

0.44

T;.;.;T;T;.

Eigen

Benign

0.093

Eigen_PC

Benign

0.062

FATHMM_MKL

Uncertain

0.93

LIST_S2

Benign

0.69

T;T;T;T;T;T

M_CAP

Benign

0.071

MetaRNN

Benign

0.34

T;T;T;T;T;T

MetaSVM

Benign

-0.58

MutationAssessor

Uncertain

2.3

M;M;M;.;.;.

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Benign

0.43

PROVEAN

Benign

-1.4

N;N;N;N;N;N

REVEL

Benign

0.20

Sift

Uncertain

0.0070

D;D;D;D;D;D

Sift4G

Uncertain

0.018

D;D;D;D;D;D

Polyphen

0.011

B;.;P;.;P;D

Vest4

0.34

MutPred

0.51

Loss of catalytic residue at L185 (P = 0.1828);Loss of catalytic residue at L185 (P = 0.1828);Loss of catalytic residue at L185 (P = 0.1828);Loss of catalytic residue at L185 (P = 0.1828);Loss of catalytic residue at L185 (P = 0.1828);.;

MVP

0.53

ClinPred

0.19

GERP RS

4.8

RBP_binding_hub_radar

0.97

RBP_regulation_power_radar

2.1

Varity_R

0.10

gMVP

0.17

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

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