rs796051883

Variant names:

• chr1-209650014-A-C
• rs796051883
• NM_000228.3:c.133T>G

Your query was ambiguous. Multiple possible variants found:

• chr1-209650014-A-C
• chr1-209650014-A-G

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_000228.3(LAMB3):​c.133T>G​(p.Ser45Ala) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (no stars). Synonymous variant affecting the same amino acid position (i.e. S45S) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: LAMB3 NM_000228.3 missense
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 7.01
• Publications: 2 publications found

Genes affected

LAMB3 (HGNC:6490): (laminin subunit beta 3) The product encoded by this gene is a laminin that belongs to a family of basement membrane proteins. This protein is a beta subunit laminin, which together with an alpha and a gamma subunit, forms laminin-5. Mutations in this gene cause epidermolysis bullosa junctional Herlitz type, and generalized atrophic benign epidermolysis bullosa, diseases that are characterized by blistering of the skin. Multiple alternatively spliced transcript variants that encode the same protein have been found for this gene. [provided by RefSeq, Jul 2008]

LAMB3 Gene-Disease associations (from GenCC):

• junctional epidermolysis bullosa

  Inheritance: AR Classification: DEFINITIVE Submitted by: Myriad Women’s Health
• junctional epidermolysis bullosa Herlitz type

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Genomics England PanelApp, Ambry Genetics, Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae)
• junctional epidermolysis bullosa, non-Herlitz type

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, Ambry Genetics
• amelogenesis imperfecta type 1A

  Inheritance: AD Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• amelogenesis imperfecta type 1

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• generalized junctional epidermolysis bullosa non-Herlitz type

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.787

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000228.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LAMB3	NM_000228.3	MANE Select	c.133T>G	p.Ser45Ala	missense	Exon 3 of 23	NP_000219.2	A0A0S2Z3R6
	LAMB3	NM_001017402.2		c.133T>G	p.Ser45Ala	missense	Exon 2 of 22	NP_001017402.1	Q13751
	LAMB3	NM_001127641.1		c.133T>G	p.Ser45Ala	missense	Exon 3 of 23	NP_001121113.1	A0A0S2Z3R6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LAMB3	ENST00000356082.9	TSL:1 MANE Select	c.133T>G	p.Ser45Ala	missense	Exon 3 of 23	ENSP00000348384.3	Q13751
	LAMB3	ENST00000367030.7	TSL:1	c.133T>G	p.Ser45Ala	missense	Exon 3 of 23	ENSP00000355997.3	Q13751
	LAMB3	ENST00000391911.5	TSL:1	c.133T>G	p.Ser45Ala	missense	Exon 2 of 22	ENSP00000375778.1	Q13751

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	1	-	Autism (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.37
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.010
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.37	T
Eigen	Uncertain	0.62
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Uncertain	0.83	D
LIST_S2	Benign	0.73	T
M_CAP	Uncertain	0.14	D
MetaRNN	Pathogenic	0.79	D
MetaSVM	Uncertain	-0.033	T
MutationAssessor	Pathogenic	3.5	H
PhyloP100		7.0
PrimateAI	Uncertain	0.57	T
PROVEAN	Uncertain	-2.6	D
REVEL	Uncertain	0.62
Sift	Uncertain	0.0060	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.54
MutPred		0.75		Gain of sheet (P = 0.0827)
MVP		0.91
MPC		0.49
ClinPred		0.99	D
GERP RS		5.4
Varity_R		0.56
gMVP		0.63
Mutation Taster		=85/15	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs796051883; hg19: chr1-209823359;