rs140670994

Positions:

chr2-73450259-G-A

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_001378454.1(ALMS1):c.3732G>A(p.Lys1244=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000257 in 1,614,024 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0013 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00015 ( 2 hom. )

Consequence

ALMS1
NM_001378454.1 synonymous

Scores

Clinical Significance

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

Conservation

PhyloP100: -0.948

Variant links:

Genes affected

ALMS1 (HGNC:428): (ALMS1 centrosome and basal body associated protein) This gene encodes a protein containing a large tandem-repeat domain as well as additional low complexity regions. The encoded protein functions in microtubule organization, particularly in the formation and maintanance of cilia. Mutations in this gene cause Alstrom syndrome. There is a pseudogene for this gene located adjacent in the same region of chromosome 2. Alternative splice variants have been described but their full length nature has not been determined. [provided by RefSeq, Apr 2014]

ALMS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.79).

BP6

Variant 2-73450259-G-A is Benign according to our data. Variant chr2-73450259-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 198872.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.948 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00128 (195/152222) while in subpopulation AFR AF= 0.00431 (179/41530). AF 95% confidence interval is 0.00379. There are 1 homozygotes in gnomad4. There are 107 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ALMS1	NM_001378454.1 linkuse as main transcript	c.3732G>A	p.Lys1244=	synonymous_variant	8/23	ENST00000613296.6
ALMS1	NM_015120.4 linkuse as main transcript	c.3735G>A	p.Lys1245=	synonymous_variant	8/23

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ALMS1	ENST00000613296.6 linkuse as main transcript	c.3732G>A	p.Lys1244=	synonymous_variant	8/23	1	NM_001378454.1	P3	Q8TCU4-1

Frequencies

GnomAD3 genomes

AF:

0.00127

AC:

193

AN:

152104

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00427

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000917

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:

0.000958

GnomAD3 exomes

AF:

0.000350

AC:

AN:

248914

Hom.:

AF XY:

0.000296

AC XY:

AN XY:

134984

show subpopulations

Gnomad AFR exome

AF:

0.00459

Gnomad AMR exome

AF:

0.000377

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000887

Gnomad OTH exome

AF:

0.000166

GnomAD4 exome

AF:

0.000150

AC:

220

AN:

1461802

Hom.:

Cov.:

AF XY:

0.000138

AC XY:

100

AN XY:

727196

show subpopulations

Gnomad4 AFR exome

AF:

0.00469

Gnomad4 AMR exome

AF:

0.000425

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000580

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.000513

GnomAD4 genome

AF:

0.00128

AC:

195

AN:

152222

Hom.:

Cov.:

AF XY:

0.00144

AC XY:

107

AN XY:

74428

show subpopulations

Gnomad4 AFR

AF:

0.00431

Gnomad4 AMR

AF:

0.000916

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000948

Alfa

AF:

0.000715

Hom.:

Bravo

AF:

0.00147

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

Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Nov 28, 2016	Variant summary: The c.3729G>A (alternative name c.3735G>A) in ALMS1 gene is a synonymous change that involves a non-conserved nucleotide. 5/5 programs in Alamut predict that this variant does not affect a normal splicing, however no functional studies supporting these predictions were published at the time of evaluation. The variant is present in the large control population dataset of ExAC at a frequency 0.0004 (48/120640 chrs tested), predominantly in individuals of African origin (0.0045; 44/9792 chrs tested). This frequency exceeds the estimated maximal expected allele frequency of a pathogenic variant in ALMS1 gene (0.0022). The variant is present in a control population dataset of gmomAD predominantly in individuals of African origin: 0.0045 (117/ 25854 chrs); however, since the data set is still in beta mode, this data was not captured in pbGP. The c. 3729G>A has not, to our knowledge, been reported in affected individuals via published reports, but is cited as Likely Benign by a reputable database/clinical laboratory. The variant seems to be an ethnic specific polymorphism, therefore it has been classified as Benign. -
Likely benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Mar 05, 2015	- -

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Mar 29, 2021

- -

Cardiovascular phenotype

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 01, 2019

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Alstrom syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 28, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.79

CADD

Benign

0.099

DANN

Benign

0.51

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over