NM_020066.5:c.671_676delAGCAGC

Variant names:

• chr1-240092766-ACAGCAG-A
• rs532298569
• NM_020066.5:c.671_676delAGCAGC

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP3

The NM_020066.5(FMN2):​c.671_676delAGCAGC​(p.Gln224_Gln225del) variant causes a disruptive inframe deletion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,457,568 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: FMN2 NM_020066.5 disruptive_inframe_deletion
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.60
• Publications: 1 publications found

Genes affected

FMN2 (HGNC:14074): (formin 2) This gene is a member of the formin homology protein family. The encoded protein is thought to have essential roles in organization of the actin cytoskeleton and in cell polarity. This protein mediates the formation of an actin mesh that positions the spindle during oogenesis and also regulates the formation of actin filaments in the nucleus. This protein also forms a perinuclear actin/focal-adhesion system that regulates the shape and position of the nucleus during cell migration. Mutations in this gene have been associated with infertility and also with an autosomal recessive form of intellectual disability (MRT47). Alternatively spliced transcript variants have been identified. [provided by RefSeq, Jul 2017]

FMN2 Gene-Disease associations (from GenCC):

• intellectual disability, autosomal recessive 47

  Inheritance: AR Classification: STRONG Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
• autosomal recessive non-syndromic intellectual disability

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP3: Nonframeshift variant in repetitive region in NM_020066.5

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020066.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FMN2	NM_020066.5	MANE Select	c.671_676delAGCAGC	p.Gln224_Gln225del	disruptive_inframe_deletion	Exon 1 of 18	NP_064450.3
	FMN2	NM_001305424.2		c.671_676delAGCAGC	p.Gln224_Gln225del	disruptive_inframe_deletion	Exon 1 of 19	NP_001292353.1
	FMN2	NM_001348094.2		c.671_676delAGCAGC	p.Gln224_Gln225del	disruptive_inframe_deletion	Exon 1 of 15	NP_001335023.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FMN2	ENST00000319653.14	TSL:5 MANE Select	c.671_676delAGCAGC	p.Gln224_Gln225del	disruptive_inframe_deletion	Exon 1 of 18	ENSP00000318884.9
	FMN2	ENST00000447095.5	TSL:3	c.-87+24707_-87+24712delAGCAGC		intron	N/A	ENSP00000409308.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000447 AC: 1 AN: 223544 AF XY: 0.00

Gnomad AFR exome AF: 0.00

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1457568 Hom.: 0 AF XY: 0.00000138 AC XY: 1 AN XY: 724938

African (AFR) AF: 0.0000599 AC: 2 AN: 33392

American (AMR) AF: 0.00 AC: 0 AN: 44122

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25986

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

South Asian (SAS) AF: 0.0000233 AC: 2 AN: 85960

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52230

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5692

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1110380

Other (OTH) AF: 0.00 AC: 0 AN: 60180

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		2.6

Splicing

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

Other links and lift over

dbSNP: rs532298569; hg19: chr1-240256066;