Variant 13-20567992-A-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_175605.5(IFT88):c.16A>G(p.Thr6Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000125 in 713,262 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000086 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00014 ( 0 hom. )

Consequence

IFT88
NM_175605.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.337

Variant links:

Genes affected

IFT88 (HGNC:20606): (intraflagellar transport 88) This gene encodes a member of the tetratrico peptide repeat (TPR) family. The encoded protein is involved in cilium biogenesis. Mutations of a similar gene in mouse can cause polycystic kidney disease. Several transcript variants encoding distinct isoforms have been identified for this gene. [provided by RefSeq, Jul 2017]

IFT88 links:

IFT88 (HGNC:):

IFT88 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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 (MetaRNN=0.022140712).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
IFT88	NM_006531.5 linkuse as main transcript	c.-7+736A>G		intron_variant		ENST00000351808.10	NP_006522.2	Q13099-2A0A140VJL7B3KX42

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
IFT88	ENST00000319980.10 linkuse as main transcript	c.16A>G	p.Thr6Ala	missense_variant	3/28	1		ENSP00000323580.6	Q13099-1
IFT88	ENST00000351808.10 linkuse as main transcript	c.-7+736A>G		intron_variant		1	NM_006531.5	ENSP00000261632.5	Q13099-2
IFT88	ENST00000389373.3 linkuse as main transcript	c.-12A>G		5_prime_UTR_variant	2/4	4		ENSP00000374024.3	F6SRW8

Frequencies

GnomAD3 genomes

AF:

0.0000857

AC:

AN:

151662

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000484

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000883

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000148

AC:

AN:

148936

Hom.:

AF XY:

0.000203

AC XY:

AN XY:

78888

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000406

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000440

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000156

Gnomad OTH exome

AF:

0.000458

GnomAD4 exome

AF:

0.000135

AC:

AN:

561488

Hom.:

Cov.:

AF XY:

0.000168

AC XY:

AN XY:

303310

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000865

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000398

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000120

Gnomad4 OTH exome

AF:

0.0000979

GnomAD4 genome

AF:

0.0000857

AC:

AN:

151774

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74196

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000415

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000884

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.000174

Hom.:

Bravo

AF:

0.0000567

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000433

AC:

ExAC

AF:

0.000400

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 18, 2023

This sequence change replaces threonine, which is neutral and polar, with alanine, which is neutral and non-polar, at codon 6 of the IFT88 protein (p.Thr6Ala). This variant is present in population databases (rs374667274, gnomAD 0.05%). This variant has not been reported in the literature in individuals affected with IFT88-related conditions. ClinVar contains an entry for this variant (Variation ID: 1394194). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. 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

BayesDel_addAF

Benign

-0.26

BayesDel_noAF

Benign

-0.28

CADD

Benign

4.7

DANN

Benign

0.52

DEOGEN2

Benign

0.086

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.035

LIST_S2

Benign

0.25

M_CAP

Benign

0.0083

MetaRNN

Benign

0.022

MetaSVM

Benign

-0.73

MutationAssessor

Benign

0.0

PROVEAN

Benign

-0.29

REVEL

Benign

0.21

Sift

Pathogenic

0.0

Sift4G

Benign

0.41

Polyphen

0.012

Vest4

0.16

MVP

0.66

MPC

0.073

ClinPred

0.12

GERP RS

0.53

Varity_R

0.18

gMVP

0.13

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

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