10-13656757-GCG-AGA

Variant names:

• chr10-13656757-GCG-AGA
• NM_018027.5:c.2830_2832delCGCinsTCT
• FRMD4A p.Arg944Ser

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The NM_018027.5(FRMD4A):​c.2830_2832delCGCinsTCT​(p.Arg944Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type MNV, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R944C) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FRMD4A NM_018027.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.86
• Publications: 0 publications found

Genes affected

FRMD4A (HGNC:25491): (FERM domain containing 4A) This gene encodes a FERM domain-containing protein that regulates epithelial cell polarity. It connects ADP ribosylation factor 6 (ARF6) with the Par protein complex, which regulates the remodeling of adherens junctions and linear actin cable formation during epithelial cell polarization. Polymorphisms in this gene are associated with Alzheimer's disease, and also with nicotine dependence. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2015]

PRPF18 (HGNC:17351): (pre-mRNA processing factor 18) Pre-mRNA splicing occurs in 2 sequential transesterification steps. The protein encoded by this gene is found to be essential for the catalytic step II in pre-mRNA splicing process. It is found in the spliceosome, and contains seven WD repeats, which function in protein-protein interactions. This protein has a sequence similarity to the yeast splicing factor Prp18. [provided by RefSeq, Jul 2008]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018027.5. 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
	FRMD4A	NM_018027.5	MANE Select	c.2830_2832delCGCinsTCT	p.Arg944Ser	missense	N/A	NP_060497.3
	FRMD4A	NM_001318337.2		c.2929_2931delCGCinsTCT	p.Arg977Ser	missense	N/A	NP_001305266.1
	FRMD4A	NM_001318336.2		c.2878_2880delCGCinsTCT	p.Arg960Ser	missense	N/A	NP_001305265.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FRMD4A	ENST00000357447.7	TSL:1 MANE Select	c.2830_2832delCGCinsTCT	p.Arg944Ser	missense	N/A	ENSP00000350032.2	Q9P2Q2
	FRMD4A	ENST00000495956.3	TSL:2	c.2830_2832delCGCinsTCT	p.Arg944Ser	missense	N/A	ENSP00000488764.2	A0A0J9YYA7
	PRPF18	ENST00000593351.2	TSL:5	n.47+8527_47+8529delGCGinsAGA		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		5.9

Splicing

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr10-13698757;