rs115502075

Variant names:

Variant summary

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

The NM_001134831.2(AHI1):c.178A>G(p.Thr60Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000531 in 1,609,594 control chromosomes in the GnomAD database, including 6 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 Likely benign (★★).

Frequency

Genomes: 𝑓 0.0026 ( 2 hom., cov: 32)

Exomes 𝑓: 0.00031 ( 4 hom. )

Consequence

AHI1
NM_001134831.2 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: -1.59

Publications

1 publications found

Variant links:

Genes affected

AHI1 (HGNC:21575): (Abelson helper integration site 1) This gene is apparently required for both cerebellar and cortical development in humans. This gene mutations cause specific forms of Joubert syndrome-related disorders. Joubert syndrome (JS) is a recessively inherited developmental brain disorder with several identified causative chromosomal loci. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Oct 2008]

AHI1 Gene-Disease associations (from GenCC):

Joubert syndrome 3
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, ClinGen, Laboratory for Molecular Medicine, Ambry Genetics
Joubert syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Joubert syndrome with ocular defect
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
retinitis pigmentosa
Inheritance: AR, AD Classification: SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Orphanet

AHI1 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=0.0042335093).

BP6

Variant 6-135467592-T-C is Benign according to our data. Variant chr6-135467592-T-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 260841.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 = 0.00261 (398/152342) while in subpopulation AFR AF = 0.00911 (379/41582). AF 95% confidence interval is 0.00836. There are 2 homozygotes in GnomAd4. There are 193 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 2 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AHI1	NM_001134831.2 link	c.178A>G	p.Thr60Ala	missense_variant	Exon 6 of 29	ENST00000265602.11	NP_001128303.1	Q8N157-1Q8NER0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AHI1	ENST00000265602.11 link	c.178A>G	p.Thr60Ala	missense_variant	Exon 6 of 29	1	NM_001134831.2	ENSP00000265602.6		Q8N157-1

Frequencies

GnomAD3 genomes

AF:

0.00261

AC:

397

AN:

152224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00912

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000785

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:

0.0000441

Gnomad OTH

AF:

0.00191

GnomAD2 exomes

AF:

0.000806

AC:

200

AN:

248174

AF XY:

0.000765

show subpopulations

Gnomad AFR exome

AF:

0.0116

Gnomad AMR exome

AF:

0.000292

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000557

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000444

Gnomad OTH exome

AF:

0.000664

GnomAD4 exome

AF:

0.000314

AC:

457

AN:

1457252

Hom.:

Cov.:

AF XY:

0.000287

AC XY:

208

AN XY:

725132

show subpopulations

African (AFR)

AF:

0.0113

AC:

378

AN:

33348

American (AMR)

AF:

0.000336

AC:

AN:

44620

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26064

East Asian (EAS)

AF:

0.0000253

AC:

AN:

39508

South Asian (SAS)

AF:

0.0000349

AC:

AN:

85986

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53154

Middle Eastern (MID)

AF:

0.000521

AC:

AN:

5756

European-Non Finnish (NFE)

AF:

0.0000280

AC:

AN:

1108592

Other (OTH)

AF:

0.000432

AC:

AN:

60224

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.454

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome 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

GnomAD4 genome

AF:

0.00261

AC:

398

AN:

152342

Hom.:

Cov.:

AF XY:

0.00259

AC XY:

193

AN XY:

74504

show subpopulations

African (AFR)

AF:

0.00911

AC:

379

AN:

41582

American (AMR)

AF:

0.000784

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68016

Other (OTH)

AF:

0.00189

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.00108

Hom.:

Bravo

AF:

0.00316

ESP6500AA

AF:

0.0125

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000985

AC:

119

Asia WGS

AF:

0.000867

AC:

AN:

3474

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Feb 21, 2017

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:2

Jan 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

AHI1: BP4, BS2 -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Joubert syndrome

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

0.063

BayesDel_addAF

Benign

-0.71

BayesDel_noAF

Benign

-0.78

CADD

Benign

0.0090

(source)

DANN

Benign

0.22

DEOGEN2

Benign

0.067

T;T;T;.

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.4

FATHMM_MKL

Benign

0.0030

LIST_S2

Benign

0.29

.;.;T;T

MetaRNN

Benign

0.0042

T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.2

L;L;L;L

PhyloP100

-1.6

PrimateAI

Benign

0.23

PROVEAN

Benign

-0.17

N;N;N;N

REVEL

Benign

0.019

Sift

Benign

1.0

T;T;T;T

Sift4G

Benign

0.66

T;T;T;T

Polyphen

0.0010

B;B;B;B

Vest4

0.084

MVP

0.16

MPC

0.041

ClinPred

0.0024

GERP RS

-1.0

Varity_R

0.033

gMVP

0.020

Mutation Taster

=100/0

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