chr19-2438273-C-A

Position:

chr19-2438273-C-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBP6

The NM_032737.4(LMNB2):c.574G>T(p.Ala192Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000465 in 1,613,926 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/19 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. A192V) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00032 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00048 ( 0 hom. )

Consequence

LMNB2
NM_032737.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:2

Conservation

PhyloP100: 1.58

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.08369461).

BP6

Variant 19-2438273-C-A is Benign according to our data. Variant chr19-2438273-C-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 542437.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LMNB2	NM_032737.4 linkuse as main transcript	c.574G>T	p.Ala192Ser	missense_variant	4/12	ENST00000325327.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LMNB2	ENST00000325327.4 linkuse as main transcript	c.574G>T	p.Ala192Ser	missense_variant	4/12	1	NM_032737.4	P1

Frequencies

GnomAD3 genomes

AF:

0.000315

AC:

AN:

152256

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000723

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000632

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000319

AC:

AN:

250888

Hom.:

AF XY:

0.000302

AC XY:

AN XY:

135800

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.000202

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000163

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000565

Gnomad OTH exome

AF:

0.000327

GnomAD4 exome

AF:

0.000480

AC:

702

AN:

1461670

Hom.:

Cov.:

AF XY:

0.000510

AC XY:

371

AN XY:

727126

show subpopulations

Gnomad4 AFR exome

AF:

0.000119

Gnomad4 AMR exome

AF:

0.000179

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000116

Gnomad4 FIN exome

AF:

0.000113

Gnomad4 NFE exome

AF:

0.000587

Gnomad4 OTH exome

AF:

0.000348

GnomAD4 genome

AF:

0.000315

AC:

AN:

152256

Hom.:

Cov.:

AF XY:

0.000282

AC XY:

AN XY:

74388

show subpopulations

Gnomad4 AFR

AF:

0.0000723

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000941

Gnomad4 NFE

AF:

0.000632

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000465

Hom.:

Bravo

AF:

0.000268

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000698

AC:

ExAC

AF:

0.000379

AC:

EpiCase

AF:

0.000654

EpiControl

AF:

0.000356

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Athena Diagnostics	May 16, 2018	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Oct 01, 2023	LMNB2: BP4 -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 26, 2022

The c.514G>T (p.A172S) alteration is located in exon 4 (coding exon 4) of the LMNB2 gene. This alteration results from a G to T substitution at nucleotide position 514, causing the alanine (A) at amino acid position 172 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

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

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 19, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.085

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.33

CADD

Benign

5.3

DANN

Benign

0.95

DEOGEN2

Uncertain

0.43

Eigen

Benign

-0.87

Eigen_PC

Benign

-0.93

FATHMM_MKL

Benign

0.71

LIST_S2

Benign

0.18

M_CAP

Benign

0.035

MetaRNN

Benign

0.084

MetaSVM

Benign

-1.0

MutationTaster

Benign

0.99

N;N

PrimateAI

Benign

0.37

REVEL

Benign

0.28

Sift4G

Benign

0.68

Vest4

0.37

MVP

0.21

MPC

0.25

ClinPred

0.014

GERP RS

0.59

Varity_R

0.020

gMVP

0.089

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