13-20574471-T-C

Variant names:

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 2P and 12B. PM2BP4_StrongBP6_Very_Strong

The NM_006531.5(IFT88):c.86T>C(p.Ile29Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000153 in 1,576,908 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00023 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00015 ( 1 hom. )

Consequence

IFT88
NM_006531.5 missense

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 2.34

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -10 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.006410986).

BP6

Variant 13-20574471-T-C is Benign according to our data. Variant chr13-20574471-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 1591717.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IFT88	NM_006531.5 link	c.86T>C	p.Ile29Thr	missense_variant	Exon 2 of 26	ENST00000351808.10	NP_006522.2	Q13099-2A0A140VJL7B3KX42

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
IFT88	ENST00000351808.10 link	c.86T>C	p.Ile29Thr	missense_variant	Exon 2 of 26	1	NM_006531.5	ENSP00000261632.5	Q13099-2
IFT88	ENST00000319980.10 link	c.113T>C	p.Ile38Thr	missense_variant	Exon 4 of 28	1		ENSP00000323580.6	Q13099-1
IFT88	ENST00000389373.3 link	c.86T>C	p.Ile29Thr	missense_variant	Exon 3 of 4	4		ENSP00000374024.3	F6SRW8

Frequencies

GnomAD3 genomes

AF:

0.000230

AC:

AN:

152202

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00170

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00191

GnomAD3 exomes

AF:

0.000441

AC:

109

AN:

247314

Hom.:

AF XY:

0.000389

AC XY:

AN XY:

133664

show subpopulations

Gnomad AFR exome

AF:

0.0000622

Gnomad AMR exome

AF:

0.00233

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000673

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000196

Gnomad OTH exome

AF:

0.000998

GnomAD4 exome

AF:

0.000145

AC:

207

AN:

1424588

Hom.:

Cov.:

AF XY:

0.000132

AC XY:

AN XY:

710636

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00232

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000238

Gnomad4 FIN exome

AF:

0.0000188

Gnomad4 NFE exome

AF:

0.0000740

Gnomad4 OTH exome

AF:

0.000373

GnomAD4 genome

AF:

0.000230

AC:

AN:

152320

Hom.:

Cov.:

AF XY:

0.000242

AC XY:

AN XY:

74496

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00170

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00189

Alfa

AF:

0.000149

Hom.:

Bravo

AF:

0.000423

ExAC

AF:

0.000486

AC:

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Jan 20, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

IFT88-related disorder

Benign:1

Aug 02, 2022

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.046

BayesDel_addAF

Benign

-0.56

BayesDel_noAF

Benign

-0.58

CADD

Benign

DANN

Benign

0.24

DEOGEN2

Benign

0.087

.;T;.

Eigen

Benign

-0.77

Eigen_PC

Benign

-0.53

FATHMM_MKL

Benign

0.093

LIST_S2

Benign

0.79

T;T;T

M_CAP

Benign

0.0039

MetaRNN

Benign

0.0064

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-1.1

.;N;.

PrimateAI

Benign

0.37

PROVEAN

Benign

0.49

N;N;N

REVEL

Benign

0.074

Sift

Benign

1.0

T;T;T

Sift4G

Benign

0.89

T;T;T

Polyphen

0.0

.;B;.

Vest4

0.17

MutPred

0.38

.;Gain of catalytic residue at I35 (P = 0.0041);.;

MVP

0.22

MPC

0.052

ClinPred

0.0055

GERP RS

4.6

Varity_R

0.031

gMVP

0.22

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

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