18-23689950-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 0P and 7B. BP4_StrongBP6_ModerateBP7

The NM_198129.4(LAMA3):c.267C>T(p.Thr89Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000048 in 1,520,136 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 Benign (★).

Frequency

Genomes: 𝑓 0.00020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000031 ( 0 hom. )

Consequence

LAMA3
NM_198129.4 synonymous

Scores

Clinical Significance

Benign criteria provided, single submitter B:1

Conservation

PhyloP100: -1.34

Publications

2 publications found

Variant links:

Genes affected

LAMA3 (HGNC:6483): (laminin subunit alpha 3) The protein encoded by this gene belongs to the laminin family of secreted molecules. Laminins are heterotrimeric molecules that consist of alpha, beta, and gamma subunits that assemble through a coiled-coil domain. Laminins are essential for formation and function of the basement membrane and have additional functions in regulating cell migration and mechanical signal transduction. This gene encodes an alpha subunit and is responsive to several epithelial-mesenchymal regulators including keratinocyte growth factor, epidermal growth factor and insulin-like growth factor. Mutations in this gene have been identified as the cause of Herlitz type junctional epidermolysis bullosa and laryngoonychocutaneous syndrome. Alternative splicing and alternative promoter usage result in multiple transcript variants. [provided by RefSeq, Dec 2014]

LAMA3 Gene-Disease associations (from GenCC):

junctional epidermolysis bullosa
Inheritance: AR Classification: DEFINITIVE Submitted by: Myriad Women’s Health
laryngo-onycho-cutaneous syndrome
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp
junctional epidermolysis bullosa Herlitz type
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Orphanet
junctional epidermolysis bullosa, non-Herlitz type
Inheritance: AR Classification: STRONG Submitted by: Genomics England PanelApp
generalized junctional epidermolysis bullosa non-Herlitz type
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

LAMA3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -7 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.55).

BP6

Variant 18-23689950-C-T is Benign according to our data. Variant chr18-23689950-C-T is described in ClinVar as Benign. ClinVar VariationId is 764266.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=-1.34 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_198129.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
LAMA3	NM_198129.4	MANE Select	c.267C>T	p.Thr89Thr	synonymous	Exon 1 of 75	NP_937762.2	Q16787-2
LAMA3	NM_001127717.4		c.267C>T	p.Thr89Thr	synonymous	Exon 1 of 74	NP_001121189.2	A0A0A0MSA0
LAMA3	NM_001302996.2		c.267C>T	p.Thr89Thr	synonymous	Exon 1 of 9	NP_001289925.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
LAMA3	ENST00000313654.14	TSL:1 MANE Select	c.267C>T	p.Thr89Thr	synonymous	Exon 1 of 75	ENSP00000324532.8	Q16787-2
LAMA3	ENST00000399516.7	TSL:1	c.267C>T	p.Thr89Thr	synonymous	Exon 1 of 74	ENSP00000382432.2	Q16787-3
LAMA3	ENST00000585600.5	TSL:1	n.267C>T		non_coding_transcript_exon	Exon 1 of 13	ENSP00000468316.1	A0A075B783

Frequencies

GnomAD3 genomes

AF:

0.000197

AC:

AN:

152212

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00385

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000204

AC:

AN:

112944

AF XY:

0.000129

show subpopulations

Gnomad AFR exome

AF:

0.000310

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00285

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000314

AC:

AN:

1367806

Hom.:

Cov.:

AF XY:

0.0000238

AC XY:

AN XY:

673268

show subpopulations

African (AFR)

AF:

0.000138

AC:

AN:

29022

American (AMR)

AF:

0.0000298

AC:

AN:

33574

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24198

East Asian (EAS)

AF:

0.000936

AC:

AN:

33114

South Asian (SAS)

AF:

0.00

AC:

AN:

75848

European-Finnish (FIN)

AF:

0.0000226

AC:

AN:

44312

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5516

European-Non Finnish (NFE)

AF:

9.39e-7

AC:

AN:

1065426

Other (OTH)

AF:

0.0000880

AC:

AN:

56796

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.504

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.000197

AC:

AN:

152330

Hom.:

Cov.:

AF XY:

0.000201

AC XY:

AN XY:

74494

show subpopulations

African (AFR)

AF:

0.000241

AC:

AN:

41576

American (AMR)

AF:

0.00

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00386

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68016

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

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:

0.00

Hom.:

Bravo

AF:

0.000219

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

ClinVar submissions

Significance:Benign

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.55

CADD

Benign

7.7

(source)

DANN

Benign

0.95

PhyloP100

-1.3

PromoterAI

-0.051

Neutral

(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

Computational scores

Splicing

Publications

Other links and lift over