rs112218090

Variant summary

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

The NM_001177701.3(IFT27):​c.415C>T​(p.Arg139Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0016 in 1,598,246 control chromosomes in the GnomAD database, including 39 homozygotes. In-silico tool predicts 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. R139Q) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0083 ( 25 hom., cov: 32)
Exomes 𝑓: 0.00090 ( 14 hom. )

Consequence

IFT27
NM_001177701.3 missense

Scores

1
9
8

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 3.44

Publications

3 publications found
Variant links:
Genes affected
IFT27 (HGNC:18626): (intraflagellar transport 27) This gene encodes a GTP-binding protein that is a core component of the intraflagellar transport complex B. Characterization of the similar Chlamydomonas protein indicates a function in cell cycle control. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Jan 2012]
CACNG2-DT (HGNC:55682): (CACNG2 divergent transcript)

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=0.0053834617).
BP6
Variant 22-36762951-G-A is Benign according to our data. Variant chr22-36762951-G-A is described in ClinVar as [Benign]. Clinvar id is 377288.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 = 0.00829 (1263/152340) while in subpopulation AFR AF = 0.0278 (1157/41566). AF 95% confidence interval is 0.0265. There are 25 homozygotes in GnomAd4. There are 598 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
BS2
High Homozygotes in GnomAd4 at 25 AR gene

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
IFT27NM_001177701.3 linkc.415C>T p.Arg139Trp missense_variant Exon 6 of 7 ENST00000433985.7 NP_001171172.1 Q9BW83-1

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
IFT27ENST00000433985.7 linkc.415C>T p.Arg139Trp missense_variant Exon 6 of 7 1 NM_001177701.3 ENSP00000393541.2 Q9BW83-1

Frequencies

GnomAD3 genomes
AF:
0.00824
AC:
1254
AN:
152222
Hom.:
23
Cov.:
32
show subpopulations
Gnomad AFR
AF:
0.0277
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.00543
Gnomad ASJ
AF:
0.00
Gnomad EAS
AF:
0.00
Gnomad SAS
AF:
0.00
Gnomad FIN
AF:
0.00
Gnomad MID
AF:
0.00633
Gnomad NFE
AF:
0.0000882
Gnomad OTH
AF:
0.00764
GnomAD2 exomes
AF:
0.00213
AC:
520
AN:
244614
AF XY:
0.00155
show subpopulations
Gnomad AFR exome
AF:
0.0279
Gnomad AMR exome
AF:
0.00154
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.00
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.000178
Gnomad OTH exome
AF:
0.00119
GnomAD4 exome
AF:
0.000898
AC:
1299
AN:
1445906
Hom.:
14
Cov.:
30
AF XY:
0.000801
AC XY:
575
AN XY:
717444
show subpopulations
African (AFR)
AF:
0.0290
AC:
962
AN:
33166
American (AMR)
AF:
0.00165
AC:
72
AN:
43580
Ashkenazi Jewish (ASJ)
AF:
0.00
AC:
0
AN:
26042
East Asian (EAS)
AF:
0.0000256
AC:
1
AN:
39024
South Asian (SAS)
AF:
0.0000360
AC:
3
AN:
83370
European-Finnish (FIN)
AF:
0.00
AC:
0
AN:
53202
Middle Eastern (MID)
AF:
0.00210
AC:
12
AN:
5722
European-Non Finnish (NFE)
AF:
0.0000998
AC:
110
AN:
1102036
Other (OTH)
AF:
0.00233
AC:
139
AN:
59764
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.478
Heterozygous variant carriers
0
67
133
200
266
333
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance

Age Distribution

Exome Het
Exome Hom
Variant carriers
0
36
72
108
144
180
<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:
0.00829
AC:
1263
AN:
152340
Hom.:
25
Cov.:
32
AF XY:
0.00803
AC XY:
598
AN XY:
74496
show subpopulations
African (AFR)
AF:
0.0278
AC:
1157
AN:
41566
American (AMR)
AF:
0.00536
AC:
82
AN:
15310
Ashkenazi Jewish (ASJ)
AF:
0.00
AC:
0
AN:
3472
East Asian (EAS)
AF:
0.00
AC:
0
AN:
5196
South Asian (SAS)
AF:
0.00
AC:
0
AN:
4830
European-Finnish (FIN)
AF:
0.00
AC:
0
AN:
10616
Middle Eastern (MID)
AF:
0.00680
AC:
2
AN:
294
European-Non Finnish (NFE)
AF:
0.0000882
AC:
6
AN:
68030
Other (OTH)
AF:
0.00756
AC:
16
AN:
2116
Allele Balance Distribution
Red line indicates average allele balance
Average allele balance: 0.501
Heterozygous variant carriers
0
62
125
187
250
312
0.00
0.20
0.40
0.60
0.80
0.95
Allele balance

Age Distribution

Genome Het
Genome Hom
Variant carriers
0
20
40
60
80
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:
0.00244
Hom.:
11
Bravo
AF:
0.00951
TwinsUK
AF:
0.000270
AC:
1
ALSPAC
AF:
0.00
AC:
0
ESP6500AA
AF:
0.0281
AC:
124
ESP6500EA
AF:
0.000116
AC:
1
ExAC
AF:
0.00278
AC:
337
Asia WGS
AF:
0.00231
AC:
8
AN:
3478

ClinVar

Significance: Benign
Submissions summary: Benign:3
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

not provided Benign:3
Feb 03, 2025
Labcorp Genetics (formerly Invitae), Labcorp
Significance:Benign
Review Status:criteria provided, single submitter
Collection Method:clinical testing

- -

Dec 30, 2016
Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics
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

- -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.16
BayesDel_addAF
Benign
-0.27
T
BayesDel_noAF
Benign
-0.14
CADD
Pathogenic
30
DANN
Pathogenic
1.0
DEOGEN2
Uncertain
0.61
.;D;D
Eigen
Uncertain
0.55
Eigen_PC
Uncertain
0.57
FATHMM_MKL
Uncertain
0.86
D
LIST_S2
Benign
0.77
T;T;D
MetaRNN
Benign
0.0054
T;T;T
MetaSVM
Benign
-0.55
T
MutationAssessor
Uncertain
2.7
.;M;.
PhyloP100
3.4
PrimateAI
Benign
0.27
T
PROVEAN
Uncertain
-4.1
D;D;D
REVEL
Uncertain
0.42
Sift
Uncertain
0.0040
D;D;D
Sift4G
Uncertain
0.010
D;D;.
Polyphen
0.97
D;D;.
Vest4
0.47
MVP
0.79
MPC
0.38
ClinPred
0.033
T
GERP RS
5.5
Varity_R
0.42
gMVP
0.47
Mutation Taster
=99/1
polymorphism

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.090
Details are displayed if max score is > 0.2

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

Publications

Other links and lift over

dbSNP: rs112218090; hg19: chr22-37158995; API