rs115517108

Positions:

• chr2-73450681-C-G

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_001378454.1(ALMS1):​c.4154C>G​(p.Thr1385Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00315 in 1,610,408 control chromosomes in the GnomAD database, including 153 homozygotes. In-silico tool predicts a benign outcome for this variant. 11/16 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.017 (67 hom., cov: 32)
  • Exomes 𝑓: 0.0018 (86 hom.)
• Consequence: ALMS1 NM_001378454.1 missense
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:13
• Conservation: PhyloP100: -0.411

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]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0024403334).
• BP6: Variant 2-73450681-C-G is Benign according to our data. Variant chr2-73450681-C-G is described in ClinVar as [Benign]. Clinvar id is 221015.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0557 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ALMS1	NM_001378454.1	c.4154C>G	p.Thr1385Arg	missense_variant	8/23	ENST00000613296.6	NP_001365383.1
ALMS1	NM_015120.4	c.4154C>G	p.Thr1385Arg	missense_variant	8/23		NP_055935.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ALMS1	ENST00000613296.6	c.4154C>G	p.Thr1385Arg	missense_variant	8/23	1	NM_001378454.1	ENSP00000482968.1

Frequencies

GnomAD3 genomes AF: 0.0166 AC: 2462 AN: 148752 Hom.: 66 Cov.: 32

Gnomad AFR AF: 0.0577

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00624

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.0144

Gnomad NFE AF: 0.000239

Gnomad OTH AF: 0.00891

GnomAD3 exomes AF: 0.00410 AC: 1022 AN: 249200 Hom.: 25 AF XY: 0.00324 AC XY: 438 AN XY: 135176

Gnomad AFR exome AF: 0.0573

Gnomad AMR exome AF: 0.00264

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000981

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000239

Gnomad OTH exome AF: 0.00248

GnomAD4 exome AF: 0.00179 AC: 2611 AN: 1461530 Hom.: 86 Cov.: 39 AF XY: 0.00160 AC XY: 1165 AN XY: 727080

Gnomad4 AFR exome AF: 0.0615

Gnomad4 AMR exome AF: 0.00291

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000130

Gnomad4 OTH exome AF: 0.00399

GnomAD4 genome AF: 0.0166 AC: 2467 AN: 148878 Hom.: 67 Cov.: 32 AF XY: 0.0155 AC XY: 1129 AN XY: 72656

Gnomad4 AFR AF: 0.0576

Gnomad4 AMR AF: 0.00623

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000239

Gnomad4 OTH AF: 0.00882

Alfa AF: 0.00484 Hom.: 5

Bravo AF: 0.0182

ESP6500AA AF: 0.0553 AC: 206

ESP6500EA AF: 0.000487 AC: 4

ExAC AF: 0.00515 AC: 622

Asia WGS AF: 0.00491 AC: 17 AN: 3478

EpiCase AF: 0.000273

EpiControl AF: 0.000356

ClinVar

Significance: Benign

Submissions summary: Benign:13

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:4

Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Mar 21, 2019	- -
Benign, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Jun 04, 2015	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Likely benign, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -

Alstrom syndrome Benign:4

Benign, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 16, 2020	- -
Benign, criteria provided, single submitter	research	Clinical Genomics, Uppaluri K&H Personalized Medicine Clinic	-	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 rs115517108 in Alstrom syndrome yet. -
Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Sep 06, 2023	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 01, 2024	- -

not specified Benign:3

Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Mar 21, 2016	p.Thr1384Arg in exon 8 of ALMS1: This variant is not expected to have clinical s ignificance because it has been identified in 5.85% (573/9792) of African chromo somes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs115517108). -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Oct 11, 2016	- -
Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -

Monogenic diabetes Benign:1

Benign, criteria provided, single submitter

research

Personalized Diabetes Medicine Program, University of Maryland School of Medicine

Feb 08, 2019

ACMG criteria: BP4 (REVEL score 0.017 + 5 predictors, not using PP3/4 predictors), BA1 (5.7% in gnomAD African), BS2 (46 homozygotes in gnomAD), BP1 (most ALMS1 pathogenic variants are truncating)= benign -

Cardiovascular phenotype Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 07, 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.034
BayesDel_addAF	Benign	-0.65	T
BayesDel_noAF	Benign	-0.66
CADD	Benign	0.024
DANN	Benign	0.12
DEOGEN2	Benign	0.0051	T;.;.
Eigen	Benign	-1.6
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.00041	N
LIST_S2	Benign	0.18	T;T;T
MetaRNN	Benign	0.0024	T;T;T
MetaSVM	Benign	-0.95	T
PrimateAI	Benign	0.24	T
Sift4G	Benign	0.32	T;T;T
Vest4		0.092
MVP		0.076
ClinPred		0.00064	T
GERP RS		1.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.043
gMVP		0.014

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

Other links and lift over

dbSNP: rs115517108; hg19: chr2-73677808;