rs142557433

Variant names:

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_StrongBP6_Very_Strong

The NM_032737.4(LMNB2):c.815G>A(p.Arg272Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000156 in 1,610,378 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R272L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00082 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000087 ( 1 hom. )

Consequence

LMNB2
NM_032737.4 missense

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: 0.169

Publications

0 publications found

Variant links:

Genes affected

LMNB2 (HGNC:6638): (lamin B2) This gene encodes a B type nuclear lamin. The nuclear lamina consists of a two-dimensional matrix of proteins located next to the inner nuclear membrane. The lamin family of proteins make up the matrix and are highly conserved in evolution. During mitosis, the lamina matrix is reversibly disassembled as the lamin proteins are phosphorylated. Lamin proteins are thought to be involved in nuclear stability, chromatin structure and gene expression. Vertebrate lamins consist of two types, A and B. Mutations in this gene are associated with acquired partial lipodystrophy. [provided by RefSeq, May 2012]

LMNB2 links:

MIR7108 (HGNC:49998): (microRNA 7108) microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene expression in multicellular organisms by affecting both the stability and translation of mRNAs. miRNAs are transcribed by RNA polymerase II as part of capped and polyadenylated primary transcripts (pri-miRNAs) that can be either protein-coding or non-coding. The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70-nt stem-loop precursor miRNA (pre-miRNA), which is further cleaved by the cytoplasmic Dicer ribonuclease to generate the mature miRNA and antisense miRNA star (miRNA*) products. The mature miRNA is incorporated into a RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing with the miRNA and most commonly results in translational inhibition or destabilization of the target mRNA. The RefSeq represents the predicted microRNA stem-loop. [provided by RefSeq, Sep 2009]

MIR7108 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -12 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.008979231).

BP6

Variant 19-2435041-C-T is Benign according to our data. Variant chr19-2435041-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 475786.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LMNB2	NM_032737.4 link	c.815G>A	p.Arg272Gln	missense_variant	Exon 5 of 12	ENST00000325327.4	NP_116126.3	Q03252
MIR7108	NR_106958.1 link	n.-41G>A		upstream_gene_variant
MIR7108	unassigned_transcript_3190	n.-108G>A		upstream_gene_variant
MIR7108	unassigned_transcript_3191	n.-41G>A		upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LMNB2	ENST00000325327.4 link	c.815G>A	p.Arg272Gln	missense_variant	Exon 5 of 12	1	NM_032737.4	ENSP00000327054.3		Q03252

Frequencies

GnomAD3 genomes

AF:

0.000821

AC:

125

AN:

152208

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00299

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:

0.00

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.000181

AC:

AN:

243652

AF XY:

0.000135

show subpopulations

Gnomad AFR exome

AF:

0.00246

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000184

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000871

AC:

127

AN:

1458052

Hom.:

Cov.:

AF XY:

0.0000827

AC XY:

AN XY:

725496

show subpopulations

African (AFR)

AF:

0.00278

AC:

AN:

33460

American (AMR)

AF:

0.0000224

AC:

AN:

44700

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26108

East Asian (EAS)

AF:

0.00

AC:

AN:

39686

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86252

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50130

Middle Eastern (MID)

AF:

0.00104

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.0000117

AC:

AN:

1111630

Other (OTH)

AF:

0.000166

AC:

AN:

60320

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.482

Heterozygous variant carriers

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:

0.000821

AC:

125

AN:

152326

Hom.:

Cov.:

AF XY:

0.000805

AC XY:

AN XY:

74490

show subpopulations

African (AFR)

AF:

0.00298

AC:

124

AN:

41584

American (AMR)

AF:

0.00

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5178

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68020

Other (OTH)

AF:

0.000473

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.509

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:

0.000349

Hom.:

Bravo

AF:

0.000963

ESP6500AA

AF:

0.00341

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000231

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Lipodystrophy, partial, acquired, susceptibility to;C4225289:Progressive myoclonic epilepsy type 9

Benign:1

Dec 16, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:1

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.069

BayesDel_addAF

Benign

-0.41

BayesDel_noAF

Benign

-0.36

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.37

Eigen

Benign

-0.73

Eigen_PC

Benign

-0.65

FATHMM_MKL

Benign

0.023

LIST_S2

Uncertain

0.92

M_CAP

Benign

0.051

MetaRNN

Benign

0.0090

MetaSVM

Benign

-1.0

PhyloP100

0.17

PrimateAI

Benign

0.32

REVEL

Benign

0.019

Sift4G

Benign

0.68

Vest4

0.21

MVP

0.28

MPC

0.31

ClinPred

0.013

GERP RS

0.34

Varity_R

0.051

gMVP

0.031

Mutation Taster

=96/4

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over