14-45167133-C-T

Position:

chr14-45167133-C-T

Variant summary

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

The NM_020937.4(FANCM):c.1972C>T(p.Arg658Ter) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000893 in 1,611,790 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 (★★). Synonymous variant affecting the same amino acid position (i.e. R658R) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000089 ( 0 hom. )

Consequence

FANCM
NM_020937.4 stop_gained

Scores

Clinical Significance

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

Conservation

PhyloP100: 0.424

Variant links:

Genes affected

FANCM (HGNC:23168): (FA complementation group M) 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 M. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2015]

FANCM 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 undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 14-45167133-C-T is Pathogenic according to our data. Variant chr14-45167133-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 444327.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr14-45167133-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FANCM	NM_020937.4 linkuse as main transcript	c.1972C>T	p.Arg658Ter	stop_gained	11/23	ENST00000267430.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FANCM	ENST00000267430.10 linkuse as main transcript	c.1972C>T	p.Arg658Ter	stop_gained	11/23	1	NM_020937.4	P1	Q8IYD8-1

Frequencies

GnomAD3 genomes

AF:

0.0000921

AC:

AN:

152082

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000162

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.0000757

AC:

AN:

251098

Hom.:

AF XY:

0.0000589

AC XY:

AN XY:

135722

show subpopulations

Gnomad AFR exome

AF:

0.0000617

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:

0.000150

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.0000891

AC:

130

AN:

1459590

Hom.:

Cov.:

AF XY:

0.0000867

AC XY:

AN XY:

726310

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000562

Gnomad4 NFE exome

AF:

0.000110

Gnomad4 OTH exome

AF:

0.0000663

GnomAD4 genome

AF:

0.0000920

AC:

AN:

152200

Hom.:

Cov.:

AF XY:

0.0000672

AC XY:

AN XY:

74400

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000208

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000162

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.000111

Hom.:

Bravo

AF:

0.0000831

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000659

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000119

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:3

Likely pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Oct 04, 2023	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; Observed as apparently homozygous or as compound heterozygous with a second FANCM truncating variant in individuals with early-onset breast cancer, childhood ALL, non-obstructive azoospermia, or premature ovarian failure (PMID: 28837162, 31942822, 34568721, 34976027); Published functional studies demonstrate a damaging effect: impairment of DNA repair activity and chromosome stability, and absent protein expression (PMID: 31700994); Observed in individuals with polycythemia, breast cancer, or ovarian cancer (PMID: 21681190, 26822949, 28033443, 29351780, 31223512, 30613976, 33099839, 28837162); This variant is associated with the following publications: (PMID: 28033443, 29351780, 21681190, 28881617, 29287190, 30676620, 26822949, 32054657, 30613976, 33099839, 31223512, 28837162, 32427313, 34584094, 33471991, 35441217, 26689913, 34976027, 34568721, 31942822, 33804961, 34308104, 31700994, 32191290) -
Pathogenic, criteria provided, single submitter	clinical testing	Institute for Clinical Genetics, University Hospital TU Dresden, University Hospital TU Dresden	Nov 03, 2021	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jul 01, 2024	FANCM: PVS1:Strong, PS4:Moderate -

Fanconi anemia

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Dec 27, 2023

This sequence change creates a premature translational stop signal (p.Arg658*) in the FANCM gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in FANCM are known to be pathogenic (PMID: 29895858, 30075111). This variant is present in population databases (rs368728266, gnomAD 0.02%). This variant has been observed to be homozygous in an individual with breast cancer and other oncological malignancies and in an individual with breast cancer, pancytopenia, and chromosome fragility (PMID: 28837162). In addition, this variant has been observed to be heterozygous in individuals affected with ovarian cancer, polycythemia vera, and breast cancer (PMID: 21681190, 26822949, 29351780, 29287190, 28033443, 28881617); and in a large case-control study, this variant was observed more frequently in individuals with ER-negative breast cancer (OR=2.44, 95% CI [1.12-5.34], p=0.034) or triple-negative breast cancer (OR=3.79, 95% CI [1.56-9.18], p=0.009) than among controls (PMID: 31700994). ClinVar contains an entry for this variant (Variation ID: 444327). Algorithms developed to predict the effect of variants on protein structure and function are not available or were not evaluated for this variant. Experimental data suggest that this variant might not result in nonsense-mediated mRNA decay. However, experimental studies showed that it affects FANCM function (PMID: 31700994). This variant disrupts the C-terminal ERCC4 nuclease domain and the helix-hairpin-helix (HhH) motifs of the FANCM protein, which are critical for the interaction between FANCM and FAAP24, chromatin localization of the FANCM/FAAP24 complex and the activation of the FA core complex (PMID: 17289582, 23932590, 18174376, 19379763, 24003026). While functional studies have not been performed to directly test the effect of this variant on FANCM protein function, this suggests that disruption of this region of the protein may be causative of disease. For these reasons, this variant has been classified as Pathogenic. -

Hereditary cancer-predisposing syndrome

Pathogenic:1

Pathogenic, criteria provided, single submitter

curation

Sema4, Sema4

Aug 25, 2021

- -

Spermatogenic failure 28

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Baylor Genetics

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.45

BayesDel_noAF

Pathogenic

0.27

CADD

Pathogenic

DANN

Uncertain

0.98

Eigen

Benign

0.11

Eigen_PC

Benign

-0.18

FATHMM_MKL

Benign

0.17

MutationTaster

Benign

1.0

A;A;D

Vest4

0.59

GERP RS

2.3

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