NM_018723.4:c.-229C>T

Variant names:

• chr16-6019890-C-T
• rs144510926
• NM_018723.4:c.-229C>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_018723.4(RBFOX1):​c.-229C>T variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000723 in 1,382,810 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.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: RBFOX1 NM_018723.4 5_prime_UTR
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.28
• Publications: 0 publications found

Genes affected

RBFOX1 (HGNC:18222): (RNA binding fox-1 homolog 1) The Fox-1 family of RNA-binding proteins is evolutionarily conserved, and regulates tissue-specific alternative splicing in metazoa. Fox-1 recognizes a (U)GCAUG stretch in regulated exons or in flanking introns. The protein binds to the C-terminus of ataxin-2 and may contribute to the restricted pathology of spinocerebellar ataxia type 2 (SCA2). Ataxin-2 is the product of the SCA2 gene which causes familial neurodegenerative diseases. Fox-1 and ataxin-2 are both localized in the trans-Golgi network. Several alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2011]

RBFOX1 Gene-Disease associations (from GenCC):

• epilepsy

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• neurodevelopmental disorder

  Inheritance: AD Classification: LIMITED Submitted by: G2P
• autism susceptibility 1

  Inheritance: Unknown Classification: LIMITED Submitted by: Laboratory for Molecular Medicine

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.3).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018723.4. 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
	RBFOX1	NM_018723.4	MANE Select	c.-229C>T		5_prime_UTR	Exon 1 of 16	NP_061193.2
	RBFOX1	NM_001411047.1		c.-9C>T		5_prime_UTR	Exon 1 of 17	NP_001397976.1
	RBFOX1	NM_001415891.1		c.-9C>T		5_prime_UTR	Exon 1 of 16	NP_001402820.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RBFOX1	ENST00000550418.6	TSL:1 MANE Select	c.-229C>T		5_prime_UTR	Exon 1 of 16	ENSP00000450031.1
	RBFOX1	ENST00000553186.5	TSL:1	c.-229C>T		5_prime_UTR	Exon 1 of 15	ENSP00000447753.1
	RBFOX1	ENST00000547605.5	TSL:1	c.-229C>T		5_prime_UTR	Exon 1 of 12	ENSP00000450402.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.23e-7 AC: 1 AN: 1382810 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 682258

⚠️ 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: 31560

American (AMR) AF: 0.00 AC: 0 AN: 35664

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25170

East Asian (EAS) AF: 0.00 AC: 0 AN: 35718

South Asian (SAS) AF: 0.00 AC: 0 AN: 79154

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 33458

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5686

European-Non Finnish (NFE) AF: 9.27e-7 AC: 1 AN: 1078532

Other (OTH) AF: 0.00 AC: 0 AN: 57868

⚠️ 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

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.30
CADD	Benign	18
DANN	Benign	0.97
PhyloP100		2.3
PromoterAI		0.024	Neutral

Splicing

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

Other links and lift over

dbSNP: rs144510926; hg19: chr16-6069891;