rs377294947

Positions:

chr9-95249227-C-T

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_000136.3(FANCC):c.65G>A(p.Trp22Ter) variant causes a stop gained change. The variant allele was found at a frequency of 0.00000372 in 1,614,018 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 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

FANCC
NM_000136.3 stop_gained

Scores

Clinical Significance

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

Conservation

PhyloP100: 3.74

Variant links:

Genes affected

FANCC (HGNC:3584): (FA complementation group C) 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 C. [provided by RefSeq, Jul 2008]

FANCC links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PVS1

Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 146 pathogenic variants in the truncated region.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 9-95249227-C-T is Pathogenic according to our data. Variant chr9-95249227-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 188926.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr9-95249227-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FANCC	NM_000136.3 linkuse as main transcript	c.65G>A	p.Trp22Ter	stop_gained	2/15	ENST00000289081.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FANCC	ENST00000289081.8 linkuse as main transcript	c.65G>A	p.Trp22Ter	stop_gained	2/15	1	NM_000136.3	P1

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152194

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

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1461824

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727218

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152194

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74338

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:

0.0000956

Hom.:

Bravo

AF:

0.0000227

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00000824

AC:

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 C

Pathogenic:5

Pathogenic, no assertion criteria provided	curation	Leiden Open Variation Database	Feb 28, 2020	Curator: Arleen D. Auerbach. Submitters to LOVD: Arleen D. Auerbach, Daniela Pilonetto, Johan de Winter. -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Dec 13, 2023	- -
Likely pathogenic, criteria provided, single submitter	literature only	Counsyl	Aug 20, 2014	- -
Pathogenic, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Oct 31, 2018	- -
Pathogenic, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Aug 14, 2017	Variant summary: The FANCC c.65G>A (p.Trp22X) variant results in a premature termination codon, predicted to cause a truncated or absent FANCC protein due to nonsense mediated decay, which are commonly known mechanisms for disease. Truncations downstream of this position have been classified as pathogenic by our laboratory (e.g.c.67delG/p.Asp23fsX23, c.1642C>T/p.Arg548X). One in silico tool predicts a damaging outcome for this variant. This variant was found in 1/121148 control chromosomes at a frequency of 0.0000083, which does not exceed the estimated maximal expected allele frequency of a pathogenic FANCC variant (0.0017678). This variant has been reported in at least three patients with Fanconi Anemia. In addition, multiple clinical diagnostic laboratories/reputable databases classified this variant as pathogenic/likely pathogenic. Taken together, this variant is classified as pathogenic. -

Fanconi anemia

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Dec 26, 2023	This sequence change creates a premature translational stop signal (p.Trp22*) in the FANCC gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in FANCC are known to be pathogenic (PMID: 17924555). This variant is present in population databases (rs377294947, gnomAD 0.008%). This premature translational stop signal has been observed in individual(s) with clinical features of Fanconi anemia (PMID: 8844212, 28717661). ClinVar contains an entry for this variant (Variation ID: 188926). For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Mar 17, 2017	- -

FANCC-related disorder

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 10, 2023

The FANCC c.65G>A variant is predicted to result in premature protein termination (p.Trp22*). This variant has been reported in the homozygous state in at least two patients with Fanconi anaemia (Gibson et al. 1996. PubMed ID: 8844212; Ameziane et al. 2008. PubMed ID: 17924555). This variant is reported in 0.011% of alleles in individuals of African descent in gnomAD (http://gnomad.broadinstitute.org/variant/9-98011509-C-T). Nonsense variants in FANCC are expected to be pathogenic. This variant is interpreted as pathogenic. -

Hereditary cancer-predisposing syndrome

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 14, 2021

The p.W22* pathogenic mutation (also known as c.65G>A), located in coding exon 1 of the FANCC gene, results from a G to A substitution at nucleotide position 65. This changes the amino acid from a tryptophan to a stop codon within coding exon 1. This alteration has been identified in the homozygous state in several patients with Fanconi Anemia (Gibson RA et al. Hum Mutat. 1996;8:140-8; Ameziane N et al. Hum Mutat. 2008 Jan;29:159-66; Pilonetto DV et al. Mol Genet Genomic Med. 2017 Jul;5:360-372). In addition to the clinical data presented in the literature, this alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.49

BayesDel_noAF

Pathogenic

0.60

CADD

Pathogenic

DANN

Uncertain

1.0

Eigen

Pathogenic

0.70

Eigen_PC

Uncertain

0.54

FATHMM_MKL

Uncertain

0.90

MutationTaster

Benign

1.0

A;A

Vest4

0.83

GERP RS

4.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

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