rs200201741

Variant names:

• chr6-135457656-T-A
• rs200201741
• NM_001134831.2:c.989A>T

Your query was ambiguous. Multiple possible variants found:

• chr6-135457656-T-A
• chr6-135457656-T-C

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001134831.2(AHI1):​c.989A>T​(p.Asp330Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000248 in 1,613,814 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D330G) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: AHI1 NM_001134831.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.60
• Publications: 5 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.26669538).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001134831.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AHI1	NM_001134831.2	MANE Select	c.989A>T	p.Asp330Val	missense	Exon 9 of 29	NP_001128303.1
	AHI1	NM_001134830.2		c.989A>T	p.Asp330Val	missense	Exon 7 of 27	NP_001128302.1
	AHI1	NM_001350503.2		c.989A>T	p.Asp330Val	missense	Exon 9 of 29	NP_001337432.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AHI1	ENST00000265602.11	TSL:1 MANE Select	c.989A>T	p.Asp330Val	missense	Exon 9 of 29	ENSP00000265602.6
	AHI1	ENST00000367800.8	TSL:1	c.989A>T	p.Asp330Val	missense	Exon 7 of 27	ENSP00000356774.4
	AHI1	ENST00000457866.6	TSL:1	c.989A>T	p.Asp330Val	missense	Exon 8 of 28	ENSP00000388650.2

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152164 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461650 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727108

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.0000671 AC: 3 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39676

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53400

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111844

Other (OTH) AF: 0.00 AC: 0 AN: 60372

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152164 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74340

African (AFR) AF: 0.00 AC: 0 AN: 41432

American (AMR) AF: 0.0000655 AC: 1 AN: 15276

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3466

East Asian (EAS) AF: 0.00 AC: 0 AN: 5200

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10620

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68026

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Joubert syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Benign	-0.022	T
BayesDel_noAF	Benign	-0.27
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.19	T
Eigen	Uncertain	0.29
Eigen_PC	Uncertain	0.29
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.073	D
MetaRNN	Benign	0.27	T
MetaSVM	Benign	-0.81	T
MutationAssessor	Benign	0.69	N
PhyloP100		1.6
PrimateAI	Benign	0.29	T
PROVEAN	Benign	-2.0	N
REVEL	Benign	0.19
Sift	Benign	0.11	T
Sift4G	Benign	0.10	T
Polyphen		0.93	P
Vest4		0.36
MutPred		0.29		Loss of sheet (P = 0.0126)
MVP		0.70
MPC		0.31
ClinPred		0.87	D
GERP RS		5.5
PromoterAI		-0.0049	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.15
gMVP		0.23
Mutation Taster		=94/6	polymorphism

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

Other links and lift over

dbSNP: rs200201741; hg19: chr6-135778794;