Genetic Variant NM_052989.3:c.1715G>T (chr3-129483546-G-T) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PP3_ModeratePP5_Moderate

The NM_052989.3(IFT122):c.1715G>T(p.Gly572Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).

Frequency

Genomes: not found (cov: 32)

Consequence

IFT122
NM_052989.3 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:2

Conservation

PhyloP100: 9.43

Publications

4 publications found

Variant links:

Genes affected

IFT122 (HGNC:13556): (intraflagellar transport 122) This gene encodes a member of the WD repeat protein family. WD repeats are minimally conserved regions of approximately 40 amino acids typically bracketed by gly-his and trp-asp (GH-WD), which may facilitate formation of heterotrimeric or multiprotein complexes. Members of this family are involved in a variety of cellular processes, including cell cycle progression, signal transduction, apoptosis, and gene regulation. This cytoplasmic protein contains seven WD repeats and an AF-2 domain which function by recruiting coregulatory molecules and in transcriptional activation. Mutations in this gene cause cranioectodermal dysplasia-1. A related pseudogene is located on chromosome 3. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2013]

IFT122 Gene-Disease associations (from GenCC):

cranioectodermal dysplasia 1
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: PanelApp Australia, G2P, ClinGen, Labcorp Genetics (formerly Invitae)
cranioectodermal dysplasia
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

IFT122 links:

ENSG00000299667 (HGNC:):

ENSG00000299667 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.868

PP5

Variant 3-129483546-G-T is Pathogenic according to our data. Variant chr3-129483546-G-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 191184.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IFT122	NM_052989.3 link	c.1715G>T	p.Gly572Val	missense_variant	Exon 15 of 30	ENST00000348417.7	NP_443715.1	Q9HBG6-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IFT122	ENST00000348417.7 link	c.1715G>T	p.Gly572Val	missense_variant	Exon 15 of 30	1	NM_052989.3	ENSP00000324005.4		Q9HBG6-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Cov.:

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Cranioectodermal dysplasia 1

Pathogenic:1

Mar 25, 2024

Genomic Medicine Center of Excellence, King Faisal Specialist Hospital and Research Centre

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Pathogenic:1

Genomic Medicine Center of Excellence, King Faisal Specialist Hospital and Research Centre

Significance:Likely pathogenic

Review Status:flagged submission

Collection Method:research

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Uncertain

0.12

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.71

.;.;.;.;.;.;.;D;T

Eigen

Pathogenic

0.68

Eigen_PC

Uncertain

0.59

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.96

D;D;D;D;D;D;D;D;D

M_CAP

Uncertain

0.24

MetaRNN

Pathogenic

0.87

D;D;D;D;D;D;D;D;D

MetaSVM

Uncertain

-0.27

MutationAssessor

Pathogenic

3.1

.;.;.;.;.;.;.;M;.

PhyloP100

9.4

PrimateAI

Pathogenic

0.81

PROVEAN

Pathogenic

-7.1

D;D;D;D;D;D;D;D;D

REVEL

Pathogenic

0.83

Sift

Uncertain

0.0070

D;D;D;D;D;D;D;D;D

Sift4G

Uncertain

0.0030

D;D;D;D;D;D;D;D;D

Polyphen

0.96, 0.99

.;.;D;.;.;.;.;D;.

Vest4

0.92

MutPred

0.56

.;.;.;.;.;.;.;Loss of sheet (P = 0.0457);.;

MVP

0.74

MPC

0.63

ClinPred

1.0

GERP RS

4.8

Varity_R

0.73

gMVP

0.77

Mutation Taster

=0/100

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.21

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.21

Position offset: 3

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over