22-50070565-C-G

Position:

• chr22-50070565-C-G

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PS1_Moderate PM1 PM2 PP3_Strong

The NM_015166.4(MLC1):​c.733G>C​(p.Ala245Pro) variant causes a missense change. The variant allele was found at a frequency of 0.000000708 in 1,412,914 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as not provided (no stars). Another nucleotide change resulting in same amino acid change has been previously reported as Likely pathogenicin UniProt. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A245G) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.1e-7 (0 hom.)
• Consequence: MLC1 NM_015166.4 missense
• Clinical Significance: not provided no classification provided O:1
• Conservation: PhyloP100: 4.33

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]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PS1: Transcript NM_015166.4 (MLC1) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in UniProt
• PM1: In a transmembrane_region Helical (size 20) in uniprot entity MLC1_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_015166.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.956

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MLC1	NM_015166.4	c.733G>C	p.Ala245Pro	missense_variant	9/12	ENST00000311597.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MLC1	ENST00000311597.10	c.733G>C	p.Ala245Pro	missense_variant	9/12	1	NM_015166.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.08e-7 AC: 1 AN: 1412914 Hom.: 0 Cov.: 31 AF XY: 0.00000143 AC XY: 1 AN XY: 697928

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.21e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

Submissions by phenotype

not provided Other:1

not provided, no classification provided

literature only

UniProtKB/Swiss-Prot

-

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.95
BayesDel_addAF	Pathogenic	0.39	D
BayesDel_noAF	Pathogenic	0.32
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.47	T;T;.
Eigen	Uncertain	0.62
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.90	.;D;D
M_CAP	Uncertain	0.21	D
MetaRNN	Pathogenic	0.96	D;D;D
MetaSVM	Uncertain	0.72	D
MutationAssessor	Uncertain	2.2	M;M;.
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Uncertain	0.68	T
PROVEAN	Pathogenic	-4.6	D;D;D
REVEL	Pathogenic	0.88
Sift	Uncertain	0.0040	D;D;D
Sift4G	Uncertain	0.014	D;D;D
Polyphen		1.0	D;D;.
Vest4		0.91
MutPred		0.89		Gain of loop (P = 0.002);Gain of loop (P = 0.002);.;
MVP		0.89
MPC		1.0
ClinPred		0.99	D
GERP RS		3.7
Varity_R		0.86
gMVP		0.93

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		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: rs281875312; hg19: chr22-50508994;