chr4-125450706-G-C

Variant names:

• chr4-125450706-G-C
• rs142877205
• NM_001291303.3:c.9696G>C

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_001291303.3(FAT4):​c.9696G>C​(p.Ala3232Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,846 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign 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. A3232A) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: FAT4 NM_001291303.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -2.62
• Publications: 0 publications found

Genes affected

FAT4 (HGNC:23109): (FAT atypical cadherin 4) The protein encoded by this gene is a member of the protocadherin family. This gene may play a role in regulating planar cell polarity (PCP). Studies in mice suggest that loss of PCP signaling may cause cystic kidney disease, and mutations in this gene have been associated with Van Maldergem Syndrome 2. Alternatively spliced transcript variants have been noted for this gene. [provided by RefSeq, Mar 2014]

FAT4 Gene-Disease associations (from GenCC):

• Hennekam lymphangiectasia-lymphedema syndrome 2

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• van Maldergem syndrome 2

  Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
• multiple congenital anomalies/dysmorphic syndrome-intellectual disability

  Inheritance: AR Classification: STRONG Submitted by: Ambry Genetics
• Hennekam syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• van Maldergem syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).
• BP7: Synonymous conserved (PhyloP=-2.62 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001291303.3. 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
	FAT4	NM_001291303.3	MANE Select	c.9696G>C	p.Ala3232Ala	synonymous	Exon 10 of 18	NP_001278232.1
	FAT4	NM_001438396.1		c.9696G>C	p.Ala3232Ala	synonymous	Exon 9 of 17	NP_001425325.1
	FAT4	NM_001291285.3		c.9696G>C	p.Ala3232Ala	synonymous	Exon 10 of 18	NP_001278214.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FAT4	ENST00000394329.9	TSL:5 MANE Select	c.9696G>C	p.Ala3232Ala	synonymous	Exon 10 of 18	ENSP00000377862.4
	FAT4	ENST00000335110.5	TSL:1	c.4584G>C	p.Ala1528Ala	synonymous	Exon 9 of 15	ENSP00000335169.5
	FAT4	ENST00000674496.2		c.4467G>C	p.Ala1489Ala	synonymous	Exon 9 of 17	ENSP00000501473.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461846 Hom.: 0 Cov.: 56 AF XY: 0.00000413 AC XY: 3 AN XY: 727228

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53414

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000360 AC: 4 AN: 1111984

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	0.024
DANN	Benign	0.34
PhyloP100		-2.6

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: rs142877205; hg19: chr4-126371861; COSMIC: COSV58703459; COSMIC: COSV58703459;