rs121917784

Variant names:

Variant summary

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

The NM_000136.3(FANCC):c.37C>T(p.Gln13*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000496 in 1,614,012 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: 32)

Exomes 𝑓: 0.0000048 ( 0 hom. )

Consequence

FANCC
NM_000136.3 stop_gained

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:12O:1

Conservation

PhyloP100: 0.854

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 26 pathogenic variants in the truncated region.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 9-95249255-G-A is Pathogenic according to our data. Variant chr9-95249255-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 12046.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr9-95249255-G-A is described in Lovd as [Pathogenic]. Variant chr9-95249255-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FANCC	NM_000136.3 link	c.37C>T	p.Gln13*	stop_gained	Exon 2 of 15	ENST00000289081.8	NP_000127.2	Q00597A0A024R9N2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FANCC	ENST00000289081.8 link	c.37C>T	p.Gln13*	stop_gained	Exon 2 of 15	1	NM_000136.3	ENSP00000289081.3		Q00597

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152178

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000797

AC:

AN:

250918

Hom.:

AF XY:

0.00000737

AC XY:

AN XY:

135600

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000289

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:

0.00000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000479

AC:

AN:

1461834

Hom.:

Cov.:

AF XY:

0.00000688

AC XY:

AN XY:

727222

show subpopulations

Gnomad4 AFR exome

AF:

0.00

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:

0.00000630

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152178

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74338

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:12Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Fanconi anemia complementation group C

Pathogenic:7Other:1

GeneReviews

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

Common in northern Europeans -

May 21, 2019

Revvity Omics, Revvity

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 28, 2020

Leiden Open Variation Database

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: curation

Curator: Arleen D. Auerbach. Submitter to LOVD: Arleen D. Auerbach. -

Sep 11, 1993

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Jul 06, 2021

Fulgent Genetics, Fulgent Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 27, 2014

Counsyl

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: literature only

- -

Feb 15, 2018

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: FANCC c.37C>T (p.Gln13X) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the 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 (eg. c.65G>A, p.Trp22X; c.553C>T, p.Arg185X; c.1642C>T, p.Arg548X). The variant allele was found at a frequency of 8.1e-06 in 245648 control chromosomes (gnomAD). This frequency is not significantly higher than expected for a pathogenic variant in FANCC causing Fanconi Anemia Group C (8.1e-06 vs 1.80E-03), allowing no conclusion about variant significance. c.37C>T has been reported in the literature in multiple individuals affected with Fanconi Anemia Group C (De Rocco_2014, Gillio_1997, Susswein_2015). These data indicate that the variant is very likely to be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Three clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. -

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Fanconi anemia

Pathogenic:2

Mar 02, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Gln13*) 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 (rs121917784, gnomAD 0.003%). This premature translational stop signal has been observed in individual(s) with Fanconi anemia (PMID: 8103176, 8128956, 9207444, 26740942). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. This variant is also known as c.292C>T. ClinVar contains an entry for this variant (Variation ID: 12046). For these reasons, this variant has been classified as Pathogenic. -

Mar 17, 2017

Natera, Inc.

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

FANCC-related disorder

Pathogenic:1

Aug 08, 2024

PreventionGenetics, part of Exact Sciences

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

The FANCC c.37C>T variant is predicted to result in premature protein termination (p.Gln13*). This variant is alternatively referred to as 292C>T in literature. It has been reported in the compound heterozygous or homozygous state in several individuals with Fanconi anemia (Verlander et al. 1994. PubMed ID: 8128956; Gillio et al. 1997. PubMed ID: 9207444). It has also been reported in an individual with diffuse B-cell lymphoma (Table S2A, Huang et al. 2018. PubMed ID: 29625052) and in one individual with breast cancer (Table S1, Susswein et al. 2015. PubMed ID: 26681312). This variant is reported in 0.0029% of alleles in individuals of Latino descent in gnomAD and is interpreted as pathogenic/likely pathogenic in ClinVar (https://www.ncbi.nlm.nih.gov/clinvar/variation/12046/). Nonsense variants in FANCC are expected to be pathogenic. This variant is interpreted as pathogenic. -

not provided

Pathogenic:1

Apr 27, 2023

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; Not observed at significant frequency in large population cohorts (gnomAD); Observed in the heterozygous state in individuals with breast and other cancers referred for genetic testing at GeneDx; This variant is associated with the following publications: (PMID: 17384215, 8103176, 8844212, 24584348, 26596371, 12552564, 8128956, 29922827, 26740942, 12670332, 20869034, 12393516, 10666230, 15516848, 9207444, 26681312, 8639804, 31937788, 29625052, 31589614) -

Hereditary cancer-predisposing syndrome

Pathogenic:1

Aug 12, 2021

Ambry Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Q13* pathogenic mutation (also known as c.37C>T), located in coding exon 1 of the FANCC gene, results from a C to T substitution at nucleotide position 37. This changes the amino acid from a glutamine to a stop codon within coding exon 1. This alteration has been reported in the homozygous and compound heterozygous state in multiple individuals with a clinical diagnosis of Fanconi anemia (Verlander PC et al. Am. J. Hum. Genet., 1994 Apr;54:595-601; Murer-Orlando M et al. Lancet, 1993 Sep;342:686; Gillio AP et al. Blood, 1997 Jul;90:105-10; Nicchia E et al. Mol Genet Genomic Med, 2015 Nov;3:500-12). In addition to the information 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

0.56

BayesDel_noAF

Pathogenic

0.53

CADD

Pathogenic

DANN

Uncertain

1.0

Eigen

Pathogenic

0.82

Eigen_PC

Uncertain

0.63

FATHMM_MKL

Benign

0.68

Vest4

0.66

GERP RS

3.1

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

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