chr2-201710994-T-C

Variant names:

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_020919.4(ALS2):c.4119A>G(p.Ile1373Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00386 in 1,578,880 control chromosomes in the GnomAD database, including 29 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0040 ( 29 hom. )

Consequence

ALS2
NM_020919.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:11

Conservation

PhyloP100: 1.44

Variant links:

Genes affected

ALS2 (HGNC:443): (alsin Rho guanine nucleotide exchange factor ALS2) The protein encoded by this gene contains an ATS1/RCC1-like domain, a RhoGEF domain, and a vacuolar protein sorting 9 (VPS9) domain, all of which are guanine-nucleotide exchange factors that activate members of the Ras superfamily of GTPases. The protein functions as a guanine nucleotide exchange factor for the small GTPase RAB5. The protein localizes with RAB5 on early endosomal compartments, and functions as a modulator for endosomal dynamics. Mutations in this gene result in several forms of juvenile lateral sclerosis and infantile-onset ascending spastic paralysis. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2008]

ALS2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.00861302).

BP6

Variant 2-201710994-T-C is Benign according to our data. Variant chr2-201710994-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 282606.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-201710994-T-C is described in Lovd as [Likely_benign]. Variant chr2-201710994-T-C is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00261 (397/152354) while in subpopulation NFE AF= 0.00476 (324/68034). AF 95% confidence interval is 0.00434. There are 0 homozygotes in gnomad4. There are 180 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 29 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ALS2	NM_020919.4 link	c.4119A>G	p.Ile1373Met	missense_variant	Exon 26 of 34	ENST00000264276.11	NP_065970.2	Q96Q42-1A8K4R4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ALS2	ENST00000264276.11 link	c.4119A>G	p.Ile1373Met	missense_variant	Exon 26 of 34	1	NM_020919.4	ENSP00000264276.6		Q96Q42-1

Frequencies

GnomAD3 genomes

AF:

0.00261

AC:

397

AN:

152236

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000892

Gnomad AMI

AF:

0.00110

Gnomad AMR

AF:

0.000916

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00160

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00476

Gnomad OTH

AF:

0.00143

GnomAD3 exomes

AF:

0.00276

AC:

687

AN:

248982

Hom.:

AF XY:

0.00267

AC XY:

361

AN XY:

135100

show subpopulations

Gnomad AFR exome

AF:

0.000711

Gnomad AMR exome

AF:

0.000667

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000981

Gnomad FIN exome

AF:

0.00234

Gnomad NFE exome

AF:

0.00521

Gnomad OTH exome

AF:

0.00182

GnomAD4 exome

AF:

0.00399

AC:

5694

AN:

1426526

Hom.:

Cov.:

AF XY:

0.00388

AC XY:

2762

AN XY:

711874

show subpopulations

Gnomad4 AFR exome

AF:

0.000643

Gnomad4 AMR exome

AF:

0.000604

Gnomad4 ASJ exome

AF:

0.000154

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000117

Gnomad4 FIN exome

AF:

0.00218

Gnomad4 NFE exome

AF:

0.00494

Gnomad4 OTH exome

AF:

0.00305

GnomAD4 genome

AF:

0.00261

AC:

397

AN:

152354

Hom.:

Cov.:

AF XY:

0.00242

AC XY:

180

AN XY:

74518

show subpopulations

Gnomad4 AFR

AF:

0.000890

Gnomad4 AMR

AF:

0.000915

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00160

Gnomad4 NFE

AF:

0.00476

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.00390

Hom.:

Bravo

AF:

0.00264

TwinsUK

AF:

0.00512

AC:

ALSPAC

AF:

0.00441

AC:

ESP6500AA

AF:

0.000826

AC:

ESP6500EA

AF:

0.00489

AC:

ExAC

AF:

0.00304

AC:

367

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.00333

EpiControl

AF:

0.00344

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:11

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:4

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Jan 23, 2020	This variant is associated with the following publications: (PMID: 27790088, 25174650) -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Feb 01, 2025	ALS2: BS2 -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -

not specified

Benign:3

Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, Amsterdam University Medical Center	-	- -
Likely benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Aug 13, 2015	- -
Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Nov 07, 2023	- -

Infantile-onset ascending hereditary spastic paralysis

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 30, 2025

- -

Amyotrophic lateral sclerosis type 2, juvenile

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

ALS2-related disorder

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

Hereditary spastic paraplegia

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

Feb 23, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.076

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.43

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.11

Eigen

Benign

0.10

Eigen_PC

Uncertain

0.23

FATHMM_MKL

Uncertain

0.79

LIST_S2

Uncertain

0.92

M_CAP

Benign

0.032

MetaRNN

Benign

0.0086

MetaSVM

Benign

-0.93

MutationAssessor

Benign

1.3

PrimateAI

Uncertain

0.60

PROVEAN

Benign

-0.12

REVEL

Benign

0.069

Sift

Benign

0.064

Sift4G

Benign

0.10

Polyphen

0.44

Vest4

0.18

MVP

0.67

MPC

0.28

ClinPred

0.014

GERP RS

4.6

Varity_R

0.073

gMVP

0.26

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