rs61741524
Variant summary
Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2
The NM_001378454.1(ALMS1):c.11821G>A(p.Gly3941Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000852 in 1,614,176 control chromosomes in the GnomAD database, including 16 homozygotes. In-silico tool predicts a benign outcome for this variant. 12/17 in silico tools predict 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. G3941C) has been classified as Uncertain significance.
Frequency
Consequence
NM_001378454.1 missense
Scores
Clinical Significance
Conservation
Publications
- Alstrom syndromeInheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, PanelApp Australia, G2P, Orphanet, Genomics England PanelApp
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ACMG classification
Our verdict: Benign. The variant received -20 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.00391 AC: 595AN: 152198Hom.: 8 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.00115 AC: 289AN: 251190 AF XY: 0.00107 show subpopulations
GnomAD4 exome AF: 0.000534 AC: 780AN: 1461860Hom.: 8 Cov.: 31 AF XY: 0.000546 AC XY: 397AN XY: 727236 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.00391 AC: 595AN: 152316Hom.: 8 Cov.: 32 AF XY: 0.00411 AC XY: 306AN XY: 74470 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
not specified Benign:6
Variant summary: ALMS1 c.11818G>A (p.Gly3940Ser, alternative name c.11824G>A) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.0014 in 277116 control chromosomes, predominantly within the African subpopulation at a frequency of 0.013 in the gnomAD database, including 4 homozygotes. The observed variant frequency within African control individuals is approximately 5.8 fold above the estimated maximal expected allele frequency for a pathogenic variant in ALMS1 causing Cardiomyopathy phenotype (0.0022), strongly suggesting that the variant is a benign polymorphism found primarily in populations of African origin. c.11818G>A has been reported in the literature in patients with clinical features of Alstrom syndrome. But this report does not provide unequivocal conclusions about association of the variant with cardiomyopathy or with Alstrom syndrome and is listed among a series of SNV's that were deemed as being unlikely to be pathogenic by the authors. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Three clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 and all laboratories classified the variant as benign/likely benign. Based on the evidence outlined above, the variant was classified as Benign. -
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p.Gly3940Ser in exon 18 of ALMS1: This variant is not expected to have clinical significance because it has been identified in 1.30% (309/24020) of African chro mosomes including 4 homozygotes by the Genome Aggregation Database (gnomAD, http ://gnomAD.broadinstitute.org; dbSNP rs61741524). ACMG/AMP criteria applied: BA1 . -
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not provided Benign:4
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Alstrom syndrome Benign:4
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Potent mutations in ALMS1 are associated with a rare condition called Alstrom syndrome. It can cause excessive eating, insulin resistance. However, no evidence is found to ascertain the role of rs61741524 in Alstrom syndrome yet. -
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Monogenic diabetes Benign:1
ACMG criteria: BP4 (9 predictors, Revel score 0.031), BA1 (1.3% in gnomAD African) , BP1, BS2 (4 homozygotes in gnomAD African)= benign -
Cardiovascular phenotype Benign:1
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. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at