rs3755920

Positions:

• chr4-1249829-T-A
• chr4-1249829-T-C
• chr4-1249829-T-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001377190.1(CTBP1):​c.-369A>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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: 35)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: CTBP1 NM_001377190.1 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.959

Genes affected

CTBP1 (HGNC:2494): (C-terminal binding protein 1) This gene encodes a protein that binds to the C-terminus of adenovirus E1A proteins. This phosphoprotein is a transcriptional repressor and may play a role during cellular proliferation. This protein and the product of a second closely related gene, CTBP2, can dimerize. Both proteins can also interact with a polycomb group protein complex which participates in regulation of gene expression during development. Alternative splicing of transcripts from this gene results in multiple transcript variants. [provided by RefSeq, Jul 2008]

CTBP1-DT (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CTBP1	NM_001377190.1	c.-369A>T		5_prime_UTR_premature_start_codon_gain_variant	1/10		NP_001364119.1
CTBP1	NM_001377193.1	c.-369A>T		5_prime_UTR_premature_start_codon_gain_variant	1/10		NP_001364122.1
CTBP1	NM_001377190.1	c.-369A>T		5_prime_UTR_variant	1/10		NP_001364119.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CTBP1	ENST00000506180.5	c.-198A>T		5_prime_UTR_premature_start_codon_gain_variant	1/5	5		ENSP00000424684.2
CTBP1	ENST00000515399.5	c.-369A>T		5_prime_UTR_premature_start_codon_gain_variant	1/5	3		ENSP00000425053.1
CTBP1	ENST00000506180.5	c.-198A>T		5_prime_UTR_variant	1/5	5		ENSP00000424684.2

Frequencies

GnomAD3 genomes Cov.: 35

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 55990 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 34978

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 35

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	3.1
DANN	Benign	0.55

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs3755920; hg19: chr4-1243617;