Genetic Variant MLC1:c.772-34G>C (chr22-50068589-C-G) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_015166.4(MLC1):c.772-34G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000022 in 1,365,258 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 0.0000072 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000016 ( 0 hom. )

Consequence

MLC1
NM_015166.4 intron

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.637

Publications

3 publications found

Variant links:

Genes affected

MLC1 (HGNC:17082): (modulator of VRAC current 1) The function of this gene product is unknown; however, homology to other proteins suggests that it may be an integral membrane transporter. Mutations in this gene have been associated with megalencephalic leukoencephalopathy with subcortical cysts, an autosomal recessive neurological disorder. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Jul 2008]

MLC1 Gene-Disease associations (from GenCC):

megalencephalic leukoencephalopathy with subcortical cysts 1
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, Myriad Women’s Health, G2P, Ambry Genetics
megalencephalic leukoencephalopathy with subcortical cysts
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

MLC1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.9).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015166.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
MLC1	NM_015166.4	MANE Select	c.772-34G>C	intron	N/A	NP_055981.1	Q15049-1
MLC1	NM_001376472.1		c.772-34G>C	intron	N/A	NP_001363401.1	Q15049-1
MLC1	NM_001376473.1		c.772-34G>C	intron	N/A	NP_001363402.1	Q15049-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
MLC1	ENST00000311597.10	TSL:1 MANE Select	c.772-34G>C	intron	N/A	ENSP00000310375.6	Q15049-1
MLC1	ENST00000395876.6	TSL:1	c.772-34G>C	intron	N/A	ENSP00000379216.2	Q15049-1
MLC1	ENST00000879262.1		c.772-34G>C	intron	N/A	ENSP00000549321.1

Frequencies

GnomAD3 genomes

AF:

0.00000724

AC:

AN:

138124

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000156

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000163

AC:

AN:

1227134

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

608322

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

28370

American (AMR)

AF:

0.00

AC:

AN:

38094

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

17260

East Asian (EAS)

AF:

0.00

AC:

AN:

18182

South Asian (SAS)

AF:

0.00

AC:

AN:

83546

European-Finnish (FIN)

AF:

0.00

AC:

AN:

32664

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4210

European-Non Finnish (NFE)

AF:

0.00000104

AC:

AN:

959542

Other (OTH)

AF:

0.0000221

AC:

AN:

45266

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.00000724

AC:

AN:

138124

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

66556

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

38402

American (AMR)

AF:

0.00

AC:

AN:

13782

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3292

East Asian (EAS)

AF:

0.00

AC:

AN:

3908

South Asian (SAS)

AF:

0.00

AC:

AN:

3904

European-Finnish (FIN)

AF:

0.00

AC:

AN:

7746

Middle Eastern (MID)

AF:

0.00

AC:

AN:

302

European-Non Finnish (NFE)

AF:

0.0000156

AC:

AN:

63982

Other (OTH)

AF:

0.00

AC:

AN:

1948

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.90

CADD

Benign

0.77

(source)

DANN

Benign

0.41

PhyloP100

-0.64

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over