chr2-73448365-G-A

Variant names:

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The NM_001378454.1(ALMS1):c.1838G>A(p.Gly613Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000394 in 1,613,924 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G613N) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0020 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00023 ( 4 hom. )

Consequence

ALMS1
NM_001378454.1 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:8

Conservation

PhyloP100: -0.295

Publications

1 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, Unknown Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), ClinGen, Orphanet

ALMS1 links:

ENSG00000295621 (HGNC:):

ENSG00000295621 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0040860176).

BP6

Variant 2-73448365-G-A is Benign according to our data. Variant chr2-73448365-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 198876.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00199 (302/152138) while in subpopulation AFR AF = 0.00691 (287/41518). AF 95% confidence interval is 0.00626. There are 1 homozygotes in GnomAd4. There are 158 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 4 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001378454.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALMS1	NM_001378454.1	MANE Select	c.1838G>A	p.Gly613Asp	missense	Exon 8 of 23	NP_001365383.1	Q8TCU4-1
	ALMS1	NM_015120.4		c.1838G>A	p.Gly613Asp	missense	Exon 8 of 23	NP_055935.4	Q8TCU4

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
ALMS1	ENST00000613296.6	TSL:1 MANE Select	c.1838G>A	p.Gly613Asp	missense	Exon 8 of 23	ENSP00000482968.1	Q8TCU4-1
ALMS1	ENST00000484298.5	TSL:1	c.1712G>A	p.Gly571Asp	missense	Exon 7 of 22	ENSP00000478155.1	A0A087WTU9
ALMS1	ENST00000684548.1		c.1457G>A	p.Gly486Asp	missense	Exon 6 of 21	ENSP00000507421.1	A0A804HJA5

Frequencies

GnomAD3 genomes

AF:

0.00199

AC:

303

AN:

152020

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00696

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000786

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:

0.00144

GnomAD2 exomes

AF:

0.000421

AC:

105

AN:

249178

AF XY:

0.000296

show subpopulations

Gnomad AFR exome

AF:

0.00646

Gnomad AMR exome

AF:

0.0000580

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000885

Gnomad OTH exome

AF:

0.000330

GnomAD4 exome

AF:

0.000228

AC:

334

AN:

1461786

Hom.:

Cov.:

AF XY:

0.000190

AC XY:

138

AN XY:

727194

show subpopulations

African (AFR)

AF:

0.00890

AC:

298

AN:

33472

American (AMR)

AF:

0.000157

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.000347

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1111938

Other (OTH)

AF:

0.000397

AC:

AN:

60386

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

108

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00199

AC:

302

AN:

152138

Hom.:

Cov.:

AF XY:

0.00212

AC XY:

158

AN XY:

74378

show subpopulations

African (AFR)

AF:

0.00691

AC:

287

AN:

41518

American (AMR)

AF:

0.000785

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3460

East Asian (EAS)

AF:

0.00

AC:

AN:

5150

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10604

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67972

Other (OTH)

AF:

0.00142

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000838

Hom.:

Bravo

AF:

0.00235

ESP6500AA

AF:

0.00634

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000521

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Alstrom syndrome (3)

not specified (3)

not provided (2)

Cardiovascular phenotype (1)

Monogenic diabetes (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Benign

-0.56

BayesDel_noAF

Benign

-0.58

CADD

Benign

1.6

(source)

DANN

Benign

0.92

DEOGEN2

Benign

0.089

Eigen

Benign

-0.85

Eigen_PC

Benign

-0.97

FATHMM_MKL

Benign

0.019

LIST_S2

Benign

0.44

M_CAP

Benign

0.0056

MetaRNN

Benign

0.0041

MetaSVM

Benign

-1.0

PhyloP100

-0.29

PrimateAI

Benign

0.23

Sift4G

Benign

0.067

Vest4

0.096

MVP

0.088

ClinPred

0.0054

GERP RS

-0.39

Varity_R

0.060

gMVP

0.039

Mutation Taster

=98/2

polymorphism

(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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over