rs772624348

Variant names:

• chr2-73572357-C-G
• rs772624348
• NM_001378454.1:c.10480C>G

Your query was ambiguous. Multiple possible variants found:

• chr2-73572357-C-G
• chr2-73572357-C-T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001378454.1(ALMS1):​c.10480C>G​(p.Gln3494Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000206 in 1,456,020 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 11/18 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q3494R) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: ALMS1 NM_001378454.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.23
• Publications: 4 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.19526184).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ALMS1	NM_001378454.1	c.10480C>G	p.Gln3494Glu	missense_variant	Exon 16 of 23	ENST00000613296.6	NP_001365383.1
ALMS1	NM_015120.4	c.10480C>G	p.Gln3494Glu	missense_variant	Exon 16 of 23		NP_055935.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ALMS1	ENST00000613296.6	c.10480C>G	p.Gln3494Glu	missense_variant	Exon 16 of 23	1	NM_001378454.1	ENSP00000482968.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000123 AC: 3 AN: 243456 AF XY: 0.0000152

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000112

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000901

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000206 AC: 3 AN: 1456020 Hom.: 0 Cov.: 31 AF XY: 0.00000276 AC XY: 2 AN XY: 723918

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33164

American (AMR) AF: 0.00 AC: 0 AN: 43934

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25794

East Asian (EAS) AF: 0.00 AC: 0 AN: 39638

South Asian (SAS) AF: 0.00 AC: 0 AN: 84788

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53162

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5726

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1109732

Other (OTH) AF: 0.0000166 AC: 1 AN: 60082

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000828 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.074
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.35
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.052	T;.;.
Eigen	Uncertain	0.43
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Benign	0.83	T;T;T
M_CAP	Benign	0.0024	T
MetaRNN	Benign	0.20	T;T;T
MetaSVM	Benign	-1.2	T
PhyloP100		2.2
PrimateAI	Benign	0.30	T
Sift4G	Uncertain	0.014	D;D;D
Vest4		0.34
MVP		0.35
ClinPred		0.75	D
GERP RS		5.6
Varity_R		0.17
gMVP		0.11
Mutation Taster		=93/7	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs772624348; hg19: chr2-73799484; COSMIC: COSV52501343;