NM_020937.4:c.1972C>T

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong

The NM_020937.4(FANCM):c.1972C>T(p.Arg658*) 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:10

Conservation

PhyloP100: 0.424

Publications

25 publications found

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 Gene-Disease associations (from GenCC):

Fanconi anemia
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: G2P, Orphanet
spermatogenic failure 28
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
male infertility with azoospermia or oligozoospermia due to single gene mutation
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
breast cancer
Inheritance: AD Classification: NO_KNOWN Submitted by: Ambry Genetics

FANCM links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 16 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PP5

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020937.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
FANCM	NM_020937.4	MANE Select	c.1972C>T	p.Arg658*	stop_gained	Exon 11 of 23	NP_065988.1
FANCM	NM_001308133.2		c.1894C>T	p.Arg632*	stop_gained	Exon 10 of 22	NP_001295062.1
FANCM	NM_001308134.2		c.1972C>T	p.Arg658*	stop_gained	Exon 11 of 11	NP_001295063.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
FANCM	ENST00000267430.10	TSL:1 MANE Select	c.1972C>T	p.Arg658*	stop_gained	Exon 11 of 23	ENSP00000267430.5
FANCM	ENST00000542564.6	TSL:1	c.1894C>T	p.Arg632*	stop_gained	Exon 10 of 22	ENSP00000442493.2
FANCM	ENST00000556250.6	TSL:1	c.1765C>T	p.Arg589*	stop_gained	Exon 10 of 22	ENSP00000452033.2

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

GnomAD2 exomes

AF:

0.0000757

AC:

AN:

251098

AF XY:

0.0000589

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 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

African (AFR)

AF:

0.00

AC:

AN:

33426

American (AMR)

AF:

0.0000224

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26120

East Asian (EAS)

AF:

0.00

AC:

AN:

39660

South Asian (SAS)

AF:

0.00

AC:

AN:

86216

European-Finnish (FIN)

AF:

0.0000562

AC:

AN:

53406

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

0.000110

AC:

122

AN:

1109968

Other (OTH)

AF:

0.0000663

AC:

AN:

60314

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.472

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000920

AC:

AN:

152200

Hom.:

Cov.:

AF XY:

0.0000672

AC XY:

AN XY:

74400

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41534

American (AMR)

AF:

0.0000655

AC:

AN:

15276

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5174

South Asian (SAS)

AF:

0.000208

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10598

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000162

AC:

AN:

68014

Other (OTH)

AF:

0.000474

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000130

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:10

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:4

Jul 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

FANCM: PVS1:Strong, PS4:Moderate

Nov 03, 2021

Institute for Clinical Genetics, University Hospital TU Dresden, University Hospital TU Dresden

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Mar 19, 2025

GeneDx

Significance:Likely 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; 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, 32191290, 31700994, 37688579, 38496821)

Dec 18, 2023

Genetic Services Laboratory, University of Chicago

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

DNA sequence analysis of the FANCM gene demonstrated a sequence change, c.1972C>T, which results in the creation of a premature stop codon at amino acid position 658, p.Arg658*. This pathogenic sequence change is predicted to result in an abnormal transcript, which may be degraded, or may lead to the production of a truncated FANCM protein with potentially abnormal function. This sequence change has been described in the gnomAD database with a frequency of 0.008% in the overall population (dbSNP rs368728266). This pathogenic sequence change has previously been described in the heterozygous or bi-allelic state in several individuals with FANCM-related disorders (PMID: 28837162, 31942822, 34568721, 31991861, 31700994). Collectively, this evidence indicates that this sequence change is pathogenic.

Fanconi anemia

Pathogenic:2

Feb 04, 2025

Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PVS1

Dec 24, 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.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 gene product 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.

Spermatogenic failure 28;C4748170:Premature ovarian failure 15

Pathogenic:1

May 22, 2024

Fulgent Genetics, Fulgent Genetics

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

FANCM-related disorder

Pathogenic:1

Apr 13, 2024

PreventionGenetics, part of Exact Sciences

Significance:Likely pathogenic

Review Status:no assertion criteria provided

Collection Method:clinical testing

The FANCM c.1972C>T variant is predicted to result in premature protein termination (p.Arg658*). This variant has been reported in individuals who have developed various types of cancer, including breast, blood, and testicular cancers (AlDubayan et al. 2019. PubMed ID: 30676620; Harutyunyan et al. 2011. PubMed ID: 21681190; Lu et al. 2015. PubMed ID: 26689913; Nguyen-Dumont et al. 2018. PubMed ID: 29351780). This variant is reported in 0.016% of alleles in individuals of European (Non-Finnish) descent in gnomAD and has conflicting interpretations regarding its pathogenicity in ClinVar, ranging from uncertain to likely pathogenic to pathogenic (https://www.ncbi.nlm.nih.gov/clinvar/variation/444327/). Given the evidence, we interpret this variant as likely pathogenic.

Hereditary cancer-predisposing syndrome

Pathogenic:1

Aug 25, 2021

Sema4, Sema4

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:curation

Spermatogenic failure 28

Pathogenic:1

Baylor Genetics

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.45

BayesDel_noAF

Pathogenic

0.27

CADD

Pathogenic

(source)

DANN

Uncertain

0.98

Eigen

Benign

0.11

Eigen_PC

Benign

-0.18

FATHMM_MKL

Benign

0.17

PhyloP100

0.42

Vest4

0.59

GERP RS

2.3

Mutation Taster

=0/200

disease causing (ClinVar)

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over