rs138081429

Positions:

chr3-160319848-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_020800.3(IFT80):c.869A>G(p.Asn290Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000986 in 1,612,908 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00015 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000093 ( 0 hom. )

Consequence

IFT80
NM_020800.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts P:1U:4

Conservation

PhyloP100: 7.32

Variant links:

Genes affected

IFT80 (HGNC:29262): (intraflagellar transport 80) The protein encoded by this gene is part of the intraflagellar transport complex B and is necessary for the function of motile and sensory cilia. Defects in this gene are a cause of asphyxiating thoracic dystrophy 2 (ATD2). Three transcript variants encoding two different isoforms have been found for this gene.[provided by RefSeq, Jun 2010]

IFT80 links:

ENSG00000248710 (HGNC:56756): (TRIM59-IFT80 readthrough (NMD candidate)) This locus represents naturally occurring readthrough transcription between the neighboring TRIM59 (tripartite motif containing 59) and IFT80 (intraflagellar transport 80) genes on chromosome 3. The readthrough transcript is unlikely to produce a protein product. [provided by RefSeq, Jun 2017]

ENSG00000248710 links:

IFT80 (HGNC:):

IFT80 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.13365743).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
IFT80	NM_020800.3 linkuse as main transcript	c.869A>G	p.Asn290Ser	missense_variant	9/20	ENST00000326448.12	NP_065851.1	Q9P2H3-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
IFT80	ENST00000326448.12 linkuse as main transcript	c.869A>G	p.Asn290Ser	missense_variant	9/20	1	NM_020800.3	ENSP00000312778.7		Q9P2H3-1
ENSG00000248710	ENST00000483754.1 linkuse as main transcript	n.1382A>G		non_coding_transcript_exon_variant	7/19	2		ENSP00000456272.1		H3BRJ5

Frequencies

GnomAD3 genomes

AF:

0.000151

AC:

AN:

151932

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00659

Gnomad AMR

AF:

0.000198

Gnomad ASJ

AF:

0.00289

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000589

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000151

AC:

AN:

250916

Hom.:

AF XY:

0.000162

AC XY:

AN XY:

135596

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000580

Gnomad ASJ exome

AF:

0.00179

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000981

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000115

Gnomad OTH exome

AF:

0.000327

GnomAD4 exome

AF:

0.0000931

AC:

136

AN:

1460976

Hom.:

Cov.:

AF XY:

0.000107

AC XY:

AN XY:

726778

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000179

Gnomad4 ASJ exome

AF:

0.00176

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000696

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000522

Gnomad4 OTH exome

AF:

0.000199

GnomAD4 genome

AF:

0.000151

AC:

AN:

151932

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74224

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000198

Gnomad4 ASJ

AF:

0.00289

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000589

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000221

Hom.:

Bravo

AF:

0.000189

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000132

AC:

EpiCase

AF:

0.000437

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Asphyxiating thoracic dystrophy 2

Pathogenic:1Uncertain:1

Likely pathogenic, no assertion criteria provided	clinical testing	Mendelics	Dec 13, 2013	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Sep 10, 2018	In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 31589614) -
Uncertain significance, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Jeune thoracic dystrophy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 11, 2023

This sequence change replaces asparagine, which is neutral and polar, with serine, which is neutral and polar, at codon 290 of the IFT80 protein (p.Asn290Ser). This variant is present in population databases (rs138081429, gnomAD 0.2%). This variant has not been reported in the literature in individuals affected with IFT80-related conditions. ClinVar contains an entry for this variant (Variation ID: 202194). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed at Invitae for this missense variant, however the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on IFT80 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.081

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.44

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.49

T;.;.

Eigen

Uncertain

0.28

Eigen_PC

Uncertain

0.37

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.93

D;.;D

M_CAP

Benign

0.020

MetaRNN

Benign

0.13

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.8

L;.;.

PrimateAI

Uncertain

0.55

PROVEAN

Uncertain

-2.7

D;D;D

REVEL

Benign

0.17

Sift

Benign

0.30

T;T;T

Sift4G

Benign

0.29

T;T;T

Polyphen

0.61

P;.;.

Vest4

0.81

MVP

0.27

MPC

0.52

ClinPred

0.089

GERP RS

4.7

Varity_R

0.23

gMVP

0.54

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over