2-27458798-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_015662.3(IFT172):c.2858G>A(p.Arg953His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00135 in 1,614,136 control chromosomes in the GnomAD database, including 12 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 Benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R953C) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0055 ( 4 hom., cov: 32)

Exomes 𝑓: 0.00092 ( 8 hom. )

Consequence

IFT172
NM_015662.3 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 0.161

Publications

10 publications found

Variant links:

Genes affected

IFT172 (HGNC:30391): (intraflagellar transport 172) This gene encodes a subunit of the intraflagellar transport subcomplex IFT-B. Subcomplexes IFT-A and IFT-B are necessary for ciliary assembly and maintenance. Mutations in this gene have been associated with skeletal ciliopathies, with or without polydactyly, such as such short-rib thoracic dysplasias 1, 9 or 10. [provided by RefSeq, Mar 2014]

IFT172 Gene-Disease associations (from GenCC):

short-rib thoracic dysplasia 10 with or without polydactyly
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
Bardet-Biedl syndrome 20
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
retinitis pigmentosa 71
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
retinitis pigmentosa
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Bardet-Biedl syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Jeune syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
short-rib thoracic dysplasia 9 with or without polydactyly
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

IFT172 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.009088665).

BP6

Variant 2-27458798-C-T is Benign according to our data. Variant chr2-27458798-C-T is described in ClinVar as Benign. ClinVar VariationId is 380464.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00549 (836/152288) while in subpopulation AFR AF = 0.0177 (737/41554). AF 95% confidence interval is 0.0167. There are 4 homozygotes in GnomAd4. There are 411 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 4 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IFT172	NM_015662.3 link	c.2858G>A	p.Arg953His	missense_variant	Exon 26 of 48	ENST00000260570.8	NP_056477.1	Q9UG01-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IFT172	ENST00000260570.8 link	c.2858G>A	p.Arg953His	missense_variant	Exon 26 of 48	1	NM_015662.3	ENSP00000260570.3		Q9UG01-1

Frequencies

GnomAD3 genomes

AF:

0.00548

AC:

834

AN:

152170

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0177

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00183

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.000283

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000867

Gnomad OTH

AF:

0.00382

GnomAD2 exomes

AF:

0.00179

AC:

451

AN:

251378

AF XY:

0.00148

show subpopulations

Gnomad AFR exome

AF:

0.0188

Gnomad AMR exome

AF:

0.00101

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000647

Gnomad NFE exome

AF:

0.000783

Gnomad OTH exome

AF:

0.000652

GnomAD4 exome

AF:

0.000919

AC:

1344

AN:

1461848

Hom.:

Cov.:

AF XY:

0.000857

AC XY:

623

AN XY:

727222

show subpopulations

African (AFR)

AF:

0.0205

AC:

685

AN:

33478

American (AMR)

AF:

0.00112

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.000197

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.000374

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.000694

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.000452

AC:

503

AN:

1111990

Other (OTH)

AF:

0.00108

AC:

AN:

60388

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.464

Heterozygous variant carriers

150

226

301

376

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

102

136

170

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00549

AC:

836

AN:

152288

Hom.:

Cov.:

AF XY:

0.00552

AC XY:

411

AN XY:

74466

show subpopulations

African (AFR)

AF:

0.0177

AC:

737

AN:

41554

American (AMR)

AF:

0.00183

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.000207

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.000283

AC:

AN:

10616

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000867

AC:

AN:

68026

Other (OTH)

AF:

0.00378

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

Heterozygous variant carriers

128

170

213

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00269

Hom.:

Bravo

AF:

0.00588

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.0136

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.00197

AC:

239

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.000327

EpiControl

AF:

0.000830

ClinVar

Significance: Benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Oct 24, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

not specified

Benign:1

Jan 10, 2022

Genetic Services Laboratory, University of Chicago

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Short-rib thoracic dysplasia 10 with or without polydactyly;C4225342:Retinitis pigmentosa 71

Benign:1

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.073

BayesDel_addAF

Benign

-0.70

BayesDel_noAF

Benign

-0.76

CADD

Benign

(source)

DANN

Benign

0.92

DEOGEN2

Benign

0.15

Eigen

Benign

-0.78

Eigen_PC

Benign

-0.60

FATHMM_MKL

Benign

0.74

LIST_S2

Benign

0.72

MetaRNN

Benign

0.0091

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.54

PhyloP100

0.16

PrimateAI

Benign

0.26

PROVEAN

Benign

-0.63

REVEL

Benign

0.046

Sift

Benign

0.25

Sift4G

Benign

0.20

Polyphen

0.0

Vest4

0.097

MVP

0.061

MPC

0.22

ClinPred

0.026

GERP RS

1.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.014

gMVP

0.28

Mutation Taster

=94/6

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over