NM_020937.4:c.1A>C

Variant names:

• chr14-45136032-A-C
• rs752141076
• NM_020937.4:c.1A>C

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PVS1_Strong PM2

The NM_020937.4(FANCM):​c.1A>C​(p.Met1?) variant causes a initiator codon change. 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.

• Frequency: Genomes: not found (cov: 33)
• Consequence: FANCM NM_020937.4 initiator_codon
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.18
• 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: Likely_pathogenic. The variant received 6 ACMG points.

• PVS1: Start lost variant, next in-frame start position is after 4 pathogenic variants. Next in-frame start position is after 125 codons. Genomic position: 45136404. Lost 0.061 part of the original CDS.
• 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.1A>C	p.Met1?	initiator_codon_variant	Exon 1 of 23	ENST00000267430.10	NP_065988.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FANCM	ENST00000267430.10	c.1A>C	p.Met1?	initiator_codon_variant	Exon 1 of 23	1	NM_020937.4	ENSP00000267430.5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.15
CADD	Uncertain	25
DANN	Benign	0.97
DEOGEN2	Benign	0.13	.;T;.
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.42
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.90	D;D;D
M_CAP	Uncertain	0.24	D
MetaRNN	Pathogenic	0.98	D;D;D
MetaSVM	Benign	-1.1	T
PhyloP100		4.2
PROVEAN	Benign	-2.0	N;N;N
REVEL	Uncertain	0.43
Sift	Pathogenic	0.0	D;D;D
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		0.60	P;D;.
Vest4		0.86
MutPred		0.98		Gain of catalytic residue at Q5 (P = 0.0794);Gain of catalytic residue at Q5 (P = 0.0794);Gain of catalytic residue at Q5 (P = 0.0794);
MVP		0.57
ClinPred		0.99	D
GERP RS		4.7
PromoterAI		0.080	Neutral
Varity_R		0.97
gMVP		0.36
Mutation Taster		=12/188	disease causing

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

Other links and lift over

dbSNP: rs752141076; hg19: chr14-45605235;