Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_052989.3(IFT122):c.2415C>T(p.Arg805Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00171 in 1,611,280 control chromosomes in the GnomAD database, including 38 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0081 ( 19 hom., cov: 33)

Exomes 𝑓: 0.0010 ( 19 hom. )

Consequence

IFT122
NM_052989.3 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -0.395

Publications

0 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:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.48).

BP6

Variant 3-129502750-C-T is Benign according to our data. Variant chr3-129502750-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 343253.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.395 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0081 (1234/152342) while in subpopulation AFR AF = 0.0273 (1133/41574). AF 95% confidence interval is 0.0259. There are 19 homozygotes in GnomAd4. There are 608 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 19 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_052989.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
IFT122	NM_052989.3	MANE Select	c.2415C>T	p.Arg805Arg	synonymous	Exon 20 of 30	NP_443715.1
IFT122	NM_052985.4		c.2568C>T	p.Arg856Arg	synonymous	Exon 21 of 31	NP_443711.2
IFT122	NM_001410808.1		c.2415C>T	p.Arg805Arg	synonymous	Exon 20 of 30	NP_001397737.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
IFT122	ENST00000348417.7	TSL:1 MANE Select	c.2415C>T	p.Arg805Arg	synonymous	Exon 20 of 30	ENSP00000324005.4
IFT122	ENST00000296266.7	TSL:1	c.2568C>T	p.Arg856Arg	synonymous	Exon 21 of 31	ENSP00000296266.3
IFT122	ENST00000507564.5	TSL:1	c.2391C>T	p.Arg797Arg	synonymous	Exon 20 of 30	ENSP00000425536.1

Frequencies

GnomAD3 genomes

AF:

0.00810

AC:

1233

AN:

152224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0273

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00451

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000176

Gnomad OTH

AF:

0.00813

GnomAD2 exomes

AF:

0.00232

AC:

578

AN:

249048

AF XY:

0.00189

show subpopulations

Gnomad AFR exome

AF:

0.0288

Gnomad AMR exome

AF:

0.00191

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000290

Gnomad OTH exome

AF:

0.00114

GnomAD4 exome

AF:

0.00104

AC:

1523

AN:

1458938

Hom.:

Cov.:

AF XY:

0.000928

AC XY:

674

AN XY:

725984

show subpopulations

African (AFR)

AF:

0.0300

AC:

1004

AN:

33480

American (AMR)

AF:

0.00208

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.000139

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50512

Middle Eastern (MID)

AF:

0.00260

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000229

AC:

255

AN:

1111990

Other (OTH)

AF:

0.00239

AC:

144

AN:

60372

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.489

Heterozygous variant carriers

102

204

305

407

509

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

114

152

190

<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:

0.00810

AC:

1234

AN:

152342

Hom.:

Cov.:

AF XY:

0.00816

AC XY:

608

AN XY:

74496

show subpopulations

African (AFR)

AF:

0.0273

AC:

1133

AN:

41574

American (AMR)

AF:

0.00451

AC:

AN:

15314

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000193

AC:

AN:

5178

South Asian (SAS)

AF:

0.000207

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000176

AC:

AN:

68036

Other (OTH)

AF:

0.00804

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.498

Heterozygous variant carriers

125

188

250

313

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:

0.00440

Hom.:

Bravo

AF:

0.00918

Asia WGS

AF:

0.00318

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.000356

ClinVar

ClinVar submissions as Germline

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Cranioectodermal dysplasia 1 (2)

not provided (2)

Connective tissue disorder (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.48

CADD

Benign

6.2

(source)

DANN

Benign

0.63

PhyloP100

-0.40

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Mutation Taster

=96/4

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

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

NM_052989.3:c.2415C>T

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

ClinVar submissions as Germline

Computational scores

Splicing

Publications

Other links and lift over