Genetic Variant IFT56:p.Leu178Met (chr7-139147277-C-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The NM_024926.4(IFT56):c.532C>A(p.Leu178Met) variant causes a missense change. The variant allele was found at a frequency of 0.00000932 in 1,608,698 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000096 ( 0 hom. )

Consequence

IFT56
NM_024926.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.12

Publications

0 publications found

Variant links:

Genes affected

IFT56 (HGNC:21882): (intraflagellar transport 56) Predicted to enable intraciliary transport particle B binding activity. Predicted to be involved in cilium organization; protein localization to cilium; and smoothened signaling pathway. Predicted to act upstream of or within manchette assembly. Predicted to be located in cilium. Predicted to be part of intraciliary transport particle B. Predicted to be active in ciliary basal body and ciliary base. [provided by Alliance of Genome Resources, Apr 2022]

IFT56 Gene-Disease associations (from GenCC):

biliary, renal, neurologic, and skeletal syndrome
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

IFT56 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IFT56	NM_024926.4 link	c.532C>A	p.Leu178Met	missense_variant	Exon 6 of 18	ENST00000464848.5	NP_079202.2	A0AVF1-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IFT56	ENST00000464848.5 link	c.532C>A	p.Leu178Met	missense_variant	Exon 6 of 18	1	NM_024926.4	ENSP00000419279.1		A0AVF1-1
IFT56	ENST00000478836.6 link	c.399+4972C>A		intron_variant	Intron 5 of 15	2		ENSP00000419178.2		B7Z6R6

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152164

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000407

AC:

AN:

245644

AF XY:

0.0000301

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000303

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000802

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000961

AC:

AN:

1456534

Hom.:

Cov.:

AF XY:

0.00000966

AC XY:

AN XY:

724490

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33260

American (AMR)

AF:

0.0000230

AC:

AN:

43452

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25896

East Asian (EAS)

AF:

0.00

AC:

AN:

39608

South Asian (SAS)

AF:

0.00

AC:

AN:

85456

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52454

Middle Eastern (MID)

AF:

0.000523

AC:

AN:

5732

European-Non Finnish (NFE)

AF:

0.00000901

AC:

AN:

1110472

Other (OTH)

AF:

0.00

AC:

AN:

60204

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.464

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152164

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74334

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41438

American (AMR)

AF:

0.00

AC:

AN:

15274

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5196

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68022

Other (OTH)

AF:

0.00

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000868

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.0000741

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 07, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.532C>A (p.L178M) alteration is located in exon 6 (coding exon 6) of the TTC26 gene. This alteration results from a C to A substitution at nucleotide position 532, causing the leucine (L) at amino acid position 178 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.67

BayesDel_addAF

Uncertain

0.047

BayesDel_noAF

Uncertain

0.020

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.093

.;T;T;.

Eigen

Pathogenic

0.74

Eigen_PC

Uncertain

0.65

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.87

D;D;D;D

M_CAP

Uncertain

0.099

MetaRNN

Uncertain

0.73

D;D;D;D

MetaSVM

Uncertain

0.65

PhyloP100

4.1

PrimateAI

Pathogenic

0.87

PROVEAN

Benign

-1.6

N;N;N;N

REVEL

Uncertain

0.60

Sift

Uncertain

0.024

D;D;D;D

Sift4G

Uncertain

0.028

D;D;D;D

Polyphen

1.0

.;D;D;.

Vest4

0.71

MutPred

0.41

Loss of catalytic residue at L178 (P = 0.0215);Loss of catalytic residue at L178 (P = 0.0215);Loss of catalytic residue at L178 (P = 0.0215);.;

MVP

0.89

MPC

0.46

ClinPred

0.34

GERP RS

4.7

Varity_R

0.19

gMVP

0.46

Mutation Taster

=56/44

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

Details are displayed if max score is > 0.2

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

Publications

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chr7-139147277-C-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over