Variant chr18-77017165-G-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM2BP4_StrongBP6_Moderate

The NM_001025101.2(MBP):c.243C>T(p.His81=) variant causes a synonymous change. The variant allele was found at a frequency of 0.00099 in 1,549,846 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.00076 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0010 ( 0 hom. )

Consequence

MBP
NM_001025101.2 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 5.46

Variant links:

Genes affected

MBP (HGNC:6925): (myelin basic protein) The protein encoded by the classic MBP gene is a major constituent of the myelin sheath of oligodendrocytes and Schwann cells in the nervous system. However, MBP-related transcripts are also present in the bone marrow and the immune system. These mRNAs arise from the long MBP gene (otherwise called "Golli-MBP") that contains 3 additional exons located upstream of the classic MBP exons. Alternative splicing from the Golli and the MBP transcription start sites gives rise to 2 sets of MBP-related transcripts and gene products. The Golli mRNAs contain 3 exons unique to Golli-MBP, spliced in-frame to 1 or more MBP exons. They encode hybrid proteins that have N-terminal Golli aa sequence linked to MBP aa sequence. The second family of transcripts contain only MBP exons and produce the well characterized myelin basic proteins. This complex gene structure is conserved among species suggesting that the MBP transcription unit is an integral part of the Golli transcription unit and that this arrangement is important for the function and/or regulation of these genes. [provided by RefSeq, Jul 2008]

MBP links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.53).

BP6

Variant 18-77017165-G-A is Benign according to our data. Variant chr18-77017165-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 728242.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MBP	NM_001025101.2 linkuse as main transcript	c.243C>T	p.His81=	synonymous_variant	4/9	ENST00000355994.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MBP	ENST00000355994.7 linkuse as main transcript	c.243C>T	p.His81=	synonymous_variant	4/9	5	NM_001025101.2	P1	P02686-1

Frequencies

GnomAD3 genomes

AF:

0.000762

AC:

116

AN:

152214

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000265

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000188

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00147

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000614

AC:

123

AN:

200452

Hom.:

AF XY:

0.000582

AC XY:

AN XY:

106440

show subpopulations

Gnomad AFR exome

AF:

0.000319

Gnomad AMR exome

AF:

0.0000751

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00124

Gnomad OTH exome

AF:

0.000219

GnomAD4 exome

AF:

0.00101

AC:

1418

AN:

1397632

Hom.:

Cov.:

AF XY:

0.000985

AC XY:

678

AN XY:

688290

show subpopulations

Gnomad4 AFR exome

AF:

0.000159

Gnomad4 AMR exome

AF:

0.0000554

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000785

Gnomad4 NFE exome

AF:

0.00129

Gnomad4 OTH exome

AF:

0.000348

GnomAD4 genome

AF:

0.000762

AC:

116

AN:

152214

Hom.:

Cov.:

AF XY:

0.000659

AC XY:

AN XY:

74366

show subpopulations

Gnomad4 AFR

AF:

0.000265

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000188

Gnomad4 NFE

AF:

0.00147

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.000454

Hom.:

Bravo

AF:

0.000665

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Dec 31, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.53

CADD

Benign

8.1

DANN

Benign

0.69

Splicing

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