Genetic Variant ALMS1:c.-48C>G (chr2-73385821-C-G) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_StrongBS1

The NM_015120.4(ALMS1):c.-48C>G variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000245 in 680,840 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.00066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00013 ( 0 hom. )

Consequence

ALMS1
NM_015120.4 5_prime_UTR

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.134

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

Alstrom syndrome
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, PanelApp Australia, G2P, Orphanet, Genomics England PanelApp

ALMS1 links:

ENSG00000285068 (HGNC:):

ENSG00000285068 links:

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ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.78).

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000657 (100/152130) while in subpopulation AFR AF = 0.00188 (78/41554). AF 95% confidence interval is 0.00154. There are 0 homozygotes in GnomAd4. There are 52 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	MANE	Protein	UniProt
ALMS1	NM_015120.4 link	c.-48C>G	5_prime_UTR_variant	Exon 1 of 23		NP_055935.4	Q8TCU4
ALMS1	NM_001378454.1 link	c.-48C>G	upstream_gene_variant		ENST00000613296.6	NP_001365383.1
LOC105374804	XR_007087045.1 link	n.-140G>C	upstream_gene_variant
LOC105374804	XR_007087053.1 link	n.-140G>C	upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ALMS1	ENST00000613296.6 link	c.-48C>G		upstream_gene_variant		1	NM_001378454.1	ENSP00000482968.1		Q8TCU4-1

Frequencies

GnomAD3 genomes

AF:

0.000664

AC:

101

AN:

152026

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00191

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00137

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:

0.000478

GnomAD2 exomes

AF:

0.000188

AC:

AN:

100932

AF XY:

0.000167

show subpopulations

Gnomad AFR exome

AF:

0.00201

Gnomad AMR exome

AF:

0.000369

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000306

GnomAD4 exome

AF:

0.000127

AC:

AN:

528710

Hom.:

Cov.:

AF XY:

0.000102

AC XY:

AN XY:

284466

show subpopulations

African (AFR)

AF:

0.00234

AC:

AN:

14926

American (AMR)

AF:

0.000339

AC:

AN:

32466

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

18064

East Asian (EAS)

AF:

0.00

AC:

AN:

31324

South Asian (SAS)

AF:

0.0000354

AC:

AN:

56466

European-Finnish (FIN)

AF:

0.00

AC:

AN:

33752

Middle Eastern (MID)

AF:

0.000424

AC:

AN:

2358

European-Non Finnish (NFE)

AF:

0.00000969

AC:

AN:

309700

Other (OTH)

AF:

0.000506

AC:

AN:

29654

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.582

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000657

AC:

100

AN:

152130

Hom.:

Cov.:

AF XY:

0.000699

AC XY:

AN XY:

74374

show subpopulations

African (AFR)

AF:

0.00188

AC:

AN:

41554

American (AMR)

AF:

0.00137

AC:

AN:

15300

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5132

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10608

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67928

Other (OTH)

AF:

0.000473

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.508

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.000763

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.78

CADD

Benign

9.3

(source)

DANN

Benign

0.63

PhyloP100

0.13

PromoterAI

0.010

Neutral

(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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2-73385821-C-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over