NM_020937.4:c.1196C>A

Variant names:

• chr14-45154709-C-A
• rs1166587869
• NM_020937.4:c.1196C>A

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_020937.4(FANCM):​c.1196C>A​(p.Ser399*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. S399S) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: FANCM NM_020937.4 stop_gained
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.941
• Publications: 2 publications found

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

ACMG classification

Our verdict: Pathogenic. The variant received 10 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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FANCM	NM_020937.4	c.1196C>A	p.Ser399*	stop_gained	Exon 7 of 23	ENST00000267430.10	NP_065988.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FANCM	ENST00000267430.10	c.1196C>A	p.Ser399*	stop_gained	Exon 7 of 23	1	NM_020937.4	ENSP00000267430.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1445034 Hom.: 0 Cov.: 27 AF XY: 0.00 AC XY: 0 AN XY: 719268

African (AFR) AF: 0.00 AC: 0 AN: 33222

American (AMR) AF: 0.00 AC: 0 AN: 44346

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25928

East Asian (EAS) AF: 0.00 AC: 0 AN: 39254

South Asian (SAS) AF: 0.00 AC: 0 AN: 84170

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52974

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5352

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1100130

Other (OTH) AF: 0.00 AC: 0 AN: 59658

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.58
CADD	Pathogenic	34
DANN	Uncertain	0.99
Eigen	Uncertain	0.33
Eigen_PC	Benign	0.091
FATHMM_MKL	Benign	0.49	N
PhyloP100		0.94
Vest4		0.80
GERP RS		2.6
PromoterAI		-0.033	Neutral
Mutation Taster		=0/200	disease causing (fs/PTC)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs1166587869; hg19: chr14-45623912;