NM_032737.4:c.255C>G

Variant names:

Variant summary

Our verdict is Benign. The variant received -17 ACMG points: 0P and 17B. BP4_StrongBP6_Very_StrongBP7BS2

The NM_032737.4(LMNB2):c.255C>G(p.Thr85Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000755 in 1,543,186 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0011 ( 1 hom., cov: 30)

Exomes 𝑓: 0.00071 ( 4 hom. )

Consequence

LMNB2
NM_032737.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 0.771

Publications

2 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 Gene-Disease associations (from GenCC):

microcephaly 27, primary, autosomal dominant
Inheritance: AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
progressive myoclonic epilepsy type 9
Inheritance: AR Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet
microcephaly
Inheritance: AD Classification: MODERATE Submitted by: Franklin by Genoox
lipodystrophy, partial, acquired, susceptibility to
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
central nervous system malformation
Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

LMNB2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -17 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.58).

BP6

Variant 19-2456679-G-C is Benign according to our data. Variant chr19-2456679-G-C is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 542445.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=0.771 with no splicing effect.

BS2

High Homozygotes in GnomAdExome4 at 4 AD,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_032737.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LMNB2	NM_032737.4	MANE Select	c.255C>G	p.Thr85Thr	synonymous	Exon 1 of 12	NP_116126.3

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LMNB2	ENST00000325327.4	TSL:1 MANE Select	c.255C>G	p.Thr85Thr	synonymous	Exon 1 of 12	ENSP00000327054.3

Frequencies

GnomAD3 genomes

AF:

0.00115

AC:

174

AN:

151732

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000725

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00374

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00544

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00149

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00129

AC:

246

AN:

190622

AF XY:

0.00132

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000142

Gnomad ASJ exome

AF:

0.00452

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00429

Gnomad NFE exome

AF:

0.00127

Gnomad OTH exome

AF:

0.00226

GnomAD4 exome

AF:

0.000712

AC:

991

AN:

1391346

Hom.:

Cov.:

AF XY:

0.000771

AC XY:

533

AN XY:

691584

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

28442

American (AMR)

AF:

0.000130

AC:

AN:

38374

Ashkenazi Jewish (ASJ)

AF:

0.00414

AC:

AN:

23652

East Asian (EAS)

AF:

0.00

AC:

AN:

32566

South Asian (SAS)

AF:

0.00

AC:

AN:

79614

European-Finnish (FIN)

AF:

0.00433

AC:

218

AN:

50292

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4506

European-Non Finnish (NFE)

AF:

0.000590

AC:

636

AN:

1077442

Other (OTH)

AF:

0.000602

AC:

AN:

56458

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.457

Heterozygous variant carriers

144

192

240

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

100

<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:

0.00115

AC:

174

AN:

151840

Hom.:

Cov.:

AF XY:

0.00139

AC XY:

103

AN XY:

74212

show subpopulations

African (AFR)

AF:

0.0000723

AC:

AN:

41490

American (AMR)

AF:

0.00

AC:

AN:

15256

Ashkenazi Jewish (ASJ)

AF:

0.00374

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5150

South Asian (SAS)

AF:

0.00

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.00544

AC:

AN:

10472

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.00149

AC:

101

AN:

67874

Other (OTH)

AF:

0.00

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.512

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:

0.00179

Hom.:

Bravo

AF:

0.000525

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Jun 17, 2019

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Feb 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

LMNB2: BP4, BP7

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

Benign:1

Jan 15, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.58

CADD

Benign

(source)

DANN

Benign

0.89

PhyloP100

0.77

PromoterAI

0.12

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Mutation Taster

=100/0

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over