Genetic Variant IFT20:p.Ala9Thr (chr17-28331961-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_001267776.2(IFT20):c.25G>A(p.Ala9Thr) variant causes a missense change. The variant allele was found at a frequency of 0.0000198 in 1,614,122 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

IFT20
NM_001267776.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.30

Publications

0 publications found

Variant links:

Genes affected

IFT20 (HGNC:30989): (intraflagellar transport 20) This gene encodes a intraflagellar transport protein important for intracellular transport. The encoded protein forms part of a complex involved in trafficking of proteins from the Golgi body, including recycling of immune signalling components (Finetti et al., PubMed: 19855387). This gene is part of a complex set of sense-antisense loci that may be co-regulated. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. A pseudogene of this gene is located on the long arm of chromosome 14.[provided by RefSeq, Jun 2012]

IFT20 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.18742684).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001267776.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
IFT20	NM_001267776.2	MANE Select	c.25G>A	p.Ala9Thr	missense	Exon 2 of 5	NP_001254705.1	Q8IY31-1
IFT20	NM_001267774.2		c.103G>A	p.Ala35Thr	missense	Exon 3 of 6	NP_001254703.1	Q8IY31-2
IFT20	NM_174887.4		c.25G>A	p.Ala9Thr	missense	Exon 2 of 6	NP_777547.1	Q8IY31-3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
IFT20	ENST00000395418.8	TSL:1 MANE Select	c.25G>A	p.Ala9Thr	missense	Exon 2 of 5	ENSP00000378809.3	Q8IY31-1
IFT20	ENST00000585089.5	TSL:1	c.103G>A	p.Ala35Thr	missense	Exon 3 of 6	ENSP00000464443.1	Q8IY31-2
IFT20	ENST00000357896.7	TSL:1	c.25G>A	p.Ala9Thr	missense	Exon 2 of 6	ENSP00000350570.3	Q8IY31-3

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152234

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000392

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:

0.0000398

AC:

AN:

251474

AF XY:

0.0000221

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000171

AC:

AN:

1461888

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

727244

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.000291

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000719

AC:

AN:

1112010

Other (OTH)

AF:

0.0000662

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.467

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

AF:

0.0000460

AC:

AN:

152234

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74390

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41464

American (AMR)

AF:

0.000392

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5200

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68032

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.461

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000529

ExAC

AF:

0.0000247

AC:

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.34

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.33

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.35

Eigen

Uncertain

0.49

Eigen_PC

Uncertain

0.58

FATHMM_MKL

Uncertain

0.90

LIST_S2

Uncertain

0.95

M_CAP

Benign

0.051

MetaRNN

Benign

0.19

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.6

PhyloP100

5.3

PrimateAI

Uncertain

0.71

PROVEAN

Benign

-1.1

REVEL

Benign

0.10

Sift

Uncertain

0.027

Sift4G

Benign

0.12

Polyphen

0.61

Vest4

0.58

MutPred

0.54

Loss of helix (P = 0.0376)

MVP

0.40

MPC

0.37

ClinPred

0.33

GERP RS

5.8

PromoterAI

0.0078

Neutral

(source)

Varity_R

0.17

gMVP

0.60

Mutation Taster

=67/33

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over