rs4939781

chr18-48571956-G-Achr18-48571956-G-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_014772.3(CTIF):c.-29+32644G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.64 in 152,110 control chromosomes in the GnomAD database, including 35,078 homozygotes. 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: 𝑓 0.64 (35078 hom., cov: 32)
• Consequence: CTIF NM_014772.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0430

Genes affected

CTIF (HGNC:23925): (cap binding complex dependent translation initiation factor) CTIF is a component of the CBP80 (NCBP1; MIM 600469)/CBP20 (NCBP2; MIM 605133) translation initiation complex that binds cotranscriptionally to the cap end of nascent mRNA. The CBP80/CBP20 complex is involved in a simultaneous editing and translation step that recognizes premature termination codons (PTCs) in mRNAs and directs PTC-containing mRNAs toward nonsense-mediated decay (NMD). On mRNAs without PTCs, the CBP80/CBP20 complex is replaced with cytoplasmic mRNA cap-binding proteins, including EIF4G (MIM 600495), and steady-state translation of the mRNAs resumes in the cytoplasm (Kim et al., 2009 [PubMed 19648179]).[supplied by OMIM, Dec 2009]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.899 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CTIF	NM_014772.3	c.-29+32644G>A		intron_variant		ENST00000256413.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CTIF	ENST00000256413.8	c.-29+32644G>A		intron_variant		1	NM_014772.3	A1

Frequencies

GnomAD3 genomes AF: 0.641 AC: 97396 AN: 151992 Hom.: 35080 Cov.: 32

Gnomad AFR AF: 0.286

Gnomad AMI AF: 0.779

Gnomad AMR AF: 0.740

Gnomad ASJ AF: 0.648

Gnomad EAS AF: 0.922

Gnomad SAS AF: 0.604

Gnomad FIN AF: 0.807

Gnomad MID AF: 0.665

Gnomad NFE AF: 0.787

Gnomad OTH AF: 0.659

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

GnomAD4 genome AF: 0.640 AC: 97403 AN: 152110 Hom.: 35078 Cov.: 32 AF XY: 0.644 AC XY: 47853 AN XY: 74358

Gnomad4 AFR AF: 0.286

Gnomad4 AMR AF: 0.740

Gnomad4 ASJ AF: 0.648

Gnomad4 EAS AF: 0.921

Gnomad4 SAS AF: 0.604

Gnomad4 FIN AF: 0.807

Gnomad4 NFE AF: 0.787

Gnomad4 OTH AF: 0.662

Alfa AF: 0.758 Hom.: 52372

Bravo AF: 0.623

Asia WGS AF: 0.729 AC: 2535 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
Cadd	Benign	2.5
Dann	Benign	0.79

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

Publications

LitVar

Other links and lift over

dbSNP: rs4939781; hg19: chr18-46098327;