NM_020937.4:c.730C>T

Variant names:

• chr14-45140680-C-T
• rs376357342
• NM_020937.4:c.730C>T

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 2P and 10B. PM2 BP4_Moderate BP6_Very_Strong

The NM_020937.4(FANCM):​c.730C>T​(p.Leu244Leu) variant causes a synonymous change. The variant allele was found at a frequency of 0.00000069 in 1,449,166 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: FANCM NM_020937.4 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 5.67
• Publications: 0 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):

• FANCM Fanconi-like genomic instability disorder

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Fanconi anemia

  Inheritance: AR Classification: STRONG, SUPPORTIVE, NO_KNOWN Submitted by: G2P, Orphanet, ClinGen
• 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
• hereditary breast carcinoma

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• breast cancer

  Inheritance: AD Classification: NO_KNOWN Submitted by: Ambry Genetics

ACMG classification

Our verdict: Benign. The variant received -8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.3).
• BP6: Variant 14-45140680-C-T is Benign according to our data. Variant chr14-45140680-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 1101032.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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FANCM	NM_020937.4	MANE Select	c.730C>T	p.Leu244Leu	synonymous	Exon 3 of 23	NP_065988.1	Q8IYD8-1
	FANCM	NM_001308134.2		c.730C>T	p.Leu244Leu	synonymous	Exon 3 of 11	NP_001295063.1	Q8IYD8-2
	FANCM	NM_001308133.2		c.681+3439C>T		intron	N/A	NP_001295062.1	Q8IYD8-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FANCM	ENST00000267430.10	TSL:1 MANE Select	c.730C>T	p.Leu244Leu	synonymous	Exon 3 of 23	ENSP00000267430.5	Q8IYD8-1
	FANCM	ENST00000556250.6	TSL:1	c.730C>T	p.Leu244Leu	synonymous	Exon 3 of 22	ENSP00000452033.2	H0YJS3
	FANCM	ENST00000556036.6	TSL:1	c.730C>T	p.Leu244Leu	synonymous	Exon 3 of 11	ENSP00000450596.1	Q8IYD8-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.90e-7 AC: 1 AN: 1449166 Hom.: 0 Cov.: 27 AF XY: 0.00000139 AC XY: 1 AN XY: 721788

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33252

American (AMR) AF: 0.00 AC: 0 AN: 44708

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26052

East Asian (EAS) AF: 0.00 AC: 0 AN: 39626

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 85944

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52830

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5736

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1100990

Other (OTH) AF: 0.00 AC: 0 AN: 60028

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	1	Fanconi anemia (1)
-	-	1	Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.30
CADD	Benign	13
DANN	Benign	0.80
PhyloP100		5.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.090		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: rs376357342; hg19: chr14-45609883;