chr11-68936840-C-T

Position:

chr11-68936840-C-T

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_StrongBP6BS1BS2

The ENST00000255078.8(IGHMBP2):c.2360C>T(p.Pro787Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000763 in 1,613,466 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 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. P787S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00050 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00079 ( 2 hom. )

Consequence

IGHMBP2
ENST00000255078.8 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:4

Conservation

PhyloP100: -3.29

Variant links:

Genes affected

IGHMBP2 (HGNC:5542): (immunoglobulin mu DNA binding protein 2) This gene encodes a helicase superfamily member that binds a specific DNA sequence from the immunoglobulin mu chain switch region. Mutations in this gene lead to spinal muscle atrophy with respiratory distress type 1. [provided by RefSeq, Jul 2008]

IGHMBP2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -13 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.011444896).

BP6

Variant 11-68936840-C-T is Benign according to our data. Variant chr11-68936840-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 245872.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=4, Uncertain_significance=6}.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000499 (76/152286) while in subpopulation NFE AF= 0.000912 (62/68010). AF 95% confidence interval is 0.000729. There are 1 homozygotes in gnomad4. There are 34 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
IGHMBP2	NM_002180.3 linkuse as main transcript	c.2360C>T	p.Pro787Leu	missense_variant	13/15	ENST00000255078.8	NP_002171.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
IGHMBP2	ENST00000255078.8 linkuse as main transcript	c.2360C>T	p.Pro787Leu	missense_variant	13/15	1	NM_002180.3	ENSP00000255078	P1

Frequencies

GnomAD3 genomes

AF:

0.000499

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

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:

0.000848

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000912

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000630

AC:

157

AN:

249216

Hom.:

AF XY:

0.000615

AC XY:

AN XY:

135052

show subpopulations

Gnomad AFR exome

AF:

0.0000623

Gnomad AMR exome

AF:

0.000203

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000512

Gnomad NFE exome

AF:

0.00122

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000790

AC:

1155

AN:

1461180

Hom.:

Cov.:

AF XY:

0.000757

AC XY:

550

AN XY:

726918

show subpopulations

Gnomad4 AFR exome

AF:

0.000149

Gnomad4 AMR exome

AF:

0.000179

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.000530

Gnomad4 NFE exome

AF:

0.000973

Gnomad4 OTH exome

AF:

0.000514

GnomAD4 genome

AF:

0.000499

AC:

AN:

152286

Hom.:

Cov.:

AF XY:

0.000457

AC XY:

AN XY:

74464

show subpopulations

Gnomad4 AFR

AF:

0.0000481

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000848

Gnomad4 NFE

AF:

0.000912

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000725

Hom.:

Bravo

AF:

0.000495

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000466

AC:

ExAC

AF:

0.000832

AC:

101

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000818

EpiControl

AF:

0.000890

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3Benign:3

Likely benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Jun 17, 2021	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Feb 05, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Mar 28, 2017	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Apr 11, 2023	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Apr 06, 2021	This variant is associated with the following publications: (PMID: 25025039, 32376792) -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Oct 01, 2021	- -

Charcot-Marie-Tooth disease

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Molecular Genetics Laboratory, London Health Sciences Centre

- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 15, 2021

The p.P787L variant (also known as c.2360C>T), located in coding exon 13 of the IGHMBP2 gene, results from a C to T substitution at nucleotide position 2360. The proline at codon 787 is replaced by leucine, an amino acid with similar properties. This amino acid position is poorly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Autosomal recessive distal spinal muscular atrophy 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Autosomal recessive distal spinal muscular atrophy 1;C4015349:Charcot-Marie-Tooth disease axonal type 2S

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 28, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.087

BayesDel_addAF

Benign

-0.65

BayesDel_noAF

Benign

-0.75

CADD

Benign

0.87

DANN

Benign

0.89

DEOGEN2

Benign

0.10

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.029

LIST_S2

Benign

0.51

M_CAP

Benign

0.0057

MetaRNN

Benign

0.011

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.0

MutationTaster

Benign

1.0

PrimateAI

Benign

0.42

PROVEAN

Benign

-1.3

REVEL

Benign

0.019

Sift

Benign

0.27

Sift4G

Benign

0.11

Polyphen

0.34

Vest4

0.083

MVP

0.25

MPC

0.19

ClinPred

0.016

GERP RS

-1.9

Varity_R

0.010

gMVP

0.19

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