rs751222088

Positions:

chr12-110127467-G-C

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM2PP5_Very_Strong

The NM_014055.4(IFT81):c.87G>C(p.Leu29Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000137 in 1,610,172 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00015 ( 0 hom. )

Consequence

IFT81
NM_014055.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3

Conservation

PhyloP100: 1.16

Variant links:

Genes affected

IFT81 (HGNC:14313): (intraflagellar transport 81) The protein encoded by this gene, together with IFT74, forms a tubulin-binding module of intraflagellar transport complex B. This module is involved in transport of tubulin within the cilium, and the encoded protein is required for ciliogenesis. Mutations in this gene are a cause of short-rib polydactyly syndromes. [provided by RefSeq, Dec 2016]

IFT81 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 10 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 12-110127467-G-C is Pathogenic according to our data. Variant chr12-110127467-G-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 495122.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
IFT81	NM_014055.4 linkuse as main transcript	c.87G>C	p.Leu29Phe	missense_variant	2/19	ENST00000242591.10	NP_054774.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
IFT81	ENST00000242591.10 linkuse as main transcript	c.87G>C	p.Leu29Phe	missense_variant	2/19	1	NM_014055.4	ENSP00000242591	P1	Q8WYA0-1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152090

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000366

AC:

AN:

245732

Hom.:

AF XY:

0.0000376

AC XY:

AN XY:

133004

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000808

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000148

AC:

216

AN:

1458082

Hom.:

Cov.:

AF XY:

0.000163

AC XY:

118

AN XY:

725172

show subpopulations

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:

0.000193

Gnomad4 OTH exome

AF:

0.0000332

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152090

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74310

show subpopulations

Gnomad4 AFR

AF:

0.0000724

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000565

Hom.:

Bravo

AF:

0.0000453

ExAC

AF:

0.0000412

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Short-rib thoracic dysplasia 19 with or without polydactyly

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

curation

SIB Swiss Institute of Bioinformatics

Oct 15, 2018

This variant is interpreted as Likely Pathogenic, for Short-rib thoracic dysplasia 19 with or without polydactyly, autosomal recessive. The following ACMG Tag(s) were applied: PM2 => Absent from controls (or at extremely low frequency if recessive) in Exome Sequencing Project, 1000 Genomes Project, or Exome Aggregation Consortium. PP3 => Multiple lines of computational evidence support a deleterious effect on the gene or gene product. PM3-Supporting => PM3 downgraded in strength to Supporting (https://www.ncbi.nlm.nih.gov/pubmed/27666822). PS3 => Well-established functional studies show a deleterious effect (https://www.ncbi.nlm.nih.gov/pubmed/27666822). -

not provided

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 11, 2023

This sequence change replaces leucine, which is neutral and non-polar, with phenylalanine, which is neutral and non-polar, at codon 29 of the IFT81 protein (p.Leu29Phe). This variant is present in population databases (rs751222088, gnomAD 0.007%). This missense change has been observed in individual(s) with clinical features of short-rib polydactyly syndrome and/or clinical features of short-rib thoracic dystrophy (PMID: 27666822; Invitae). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 495122). 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) performed at Invitae indicates that this missense variant is expected to disrupt IFT81 protein function. Studies have shown that this missense change alters IFT81 gene expression (PMID: 27666822). For these reasons, this variant has been classified as Pathogenic. -

SHORT-RIB THORACIC DYSPLASIA 19 WITHOUT POLYDACTYLY

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Feb 28, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.32

BayesDel_addAF

Uncertain

0.033

BayesDel_noAF

Uncertain

0.0

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.32

.;T;T;.

Eigen

Uncertain

0.46

Eigen_PC

Uncertain

0.44

FATHMM_MKL

Uncertain

0.93

LIST_S2

Uncertain

0.96

D;.;D;D

M_CAP

Uncertain

0.17

MetaRNN

Uncertain

0.58

D;D;D;D

MetaSVM

Uncertain

0.33

MutationAssessor

Uncertain

2.5

M;M;M;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.67

PROVEAN

Uncertain

-2.9

D;D;D;D

REVEL

Uncertain

0.61

Sift

Uncertain

0.013

D;D;D;D

Sift4G

Uncertain

0.018

D;T;T;D

Polyphen

1.0

D;D;D;.

Vest4

0.76

MutPred

0.38

Gain of catalytic residue at D27 (P = 5e-04);Gain of catalytic residue at D27 (P = 5e-04);Gain of catalytic residue at D27 (P = 5e-04);Gain of catalytic residue at D27 (P = 5e-04);

MVP

0.91

MPC

0.61

ClinPred

0.67

GERP RS

5.2

Varity_R

0.32

gMVP

0.64

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