Genetic Variant IFT172:p.Ser1724Asn (chr2-27444511-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_015662.3(IFT172):c.5171G>A(p.Ser1724Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,122 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S1724I) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

IFT172
NM_015662.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.38

Publications

0 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 links:

KRTCAP3 (HGNC:28943): (keratinocyte associated protein 3) Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

KRTCAP3 links:

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ACMG classification

Classification was made for transcript

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

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.25320637).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015662.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
IFT172	NM_015662.3	MANE Select	c.5171G>A	p.Ser1724Asn	missense	Exon 48 of 48	NP_056477.1	Q9UG01-1
IFT172	NM_001410739.1		c.5105G>A	p.Ser1702Asn	missense	Exon 48 of 48	NP_001397668.1	A0A6Q8PGJ2
KRTCAP3	NM_001168364.2		c.*5+450C>T		intron	N/A	NP_001161836.1	Q53RY4-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
IFT172	ENST00000260570.8	TSL:1 MANE Select	c.5171G>A	p.Ser1724Asn	missense	Exon 48 of 48	ENSP00000260570.3	Q9UG01-1
IFT172	ENST00000509128.5	TSL:1	n.*616G>A		non_coding_transcript_exon	Exon 16 of 16	ENSP00000427255.1	H0YAI8
IFT172	ENST00000509128.5	TSL:1	n.*616G>A		3_prime_UTR	Exon 16 of 16	ENSP00000427255.1	H0YAI8

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461122

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726842

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33464

American (AMR)

AF:

0.00

AC:

AN:

44678

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26116

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.00

AC:

AN:

86088

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53352

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5758

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1111600

Other (OTH)

AF:

0.00

AC:

AN:

60370

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<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

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.47

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.10

Eigen

Benign

-0.21

Eigen_PC

Benign

0.022

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.87

M_CAP

Benign

0.025

MetaRNN

Benign

0.25

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.7

PhyloP100

7.4

PrimateAI

Uncertain

0.70

PROVEAN

Benign

-0.72

REVEL

Benign

0.051

Sift

Benign

0.24

Sift4G

Benign

0.44

Polyphen

0.043

Vest4

0.56

MutPred

0.27

Gain of ubiquitination at K1720 (P = 0.1245)

MVP

0.30

MPC

0.17

ClinPred

0.87

GERP RS

4.7

Varity_R

0.18

gMVP

0.51

Mutation Taster

=84/16

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over