rs1554301637

chr6-129464288-AGTCCTCAGGTGGAAGATAGTGAGGGGACTATTCAATTTGATGGAGAAGGTTATGCATTGGTCAGCCGTCCCATTCGCTGGTACCCCAACATCTCCACTGTCATGTTCAAGTTCAGAACATTTTCTTCGAGTGCTCTTCTGATGTATCTTGCCACACGAGACCT-A

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PVS1 PP3 PP5_Moderate

The NM_000426.4(LAMA2):c.6993_7155del(p.Ser2331ArgfsTer5) variant causes a splice acceptor, coding sequence change involving the alteration of a conserved nucleotide. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: LAMA2 NM_000426.4 splice_acceptor, coding_sequence
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 9.48

Genes affected

LAMA2 (HGNC:6482): (laminin subunit alpha 2) Laminin, an extracellular protein, is a major component of the basement membrane. It is thought to mediate the attachment, migration, and organization of cells into tissues during embryonic development by interacting with other extracellular matrix components. It is composed of three subunits, alpha, beta, and gamma, which are bound to each other by disulfide bonds into a cross-shaped molecule. This gene encodes the alpha 2 chain, which constitutes one of the subunits of laminin 2 (merosin) and laminin 4 (s-merosin). Mutations in this gene have been identified as the cause of congenital merosin-deficient muscular dystrophy. Two transcript variants encoding different proteins have been found for this gene. [provided by RefSeq, Jul 2008]

(HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 11 ACMG points.

• PVS1: Splicing variant, LoF is a know mechanism of disease, No cryptic splice site detected. Exon removal results in frameshift change.
• PP3: No computational evidence supports a deleterious effect, but strongly conserved according to phyloP
• PP5: Variant 6-129464288-AGTCCTCAGGTGGAAGATAGTGAGGGGACTATTCAATTTGATGGAGAAGGTTATGCATTGGTCAGCCGTCCCATTCGCTGGTACCCCAACATCTCCACTGTCATGTTCAAGTTCAGAACATTTTCTTCGAGTGCTCTTCTGATGTATCTTGCCACACGAGACCT-A is Pathogenic according to our data. Variant chr6-129464288-AGTCCTCAGGTGGAAGATAGTGAGGGGACTATTCAATTTGATGGAGAAGGTTATGCATTGGTCAGCCGTCCCATTCGCTGGTACCCCAACATCTCCACTGTCATGTTCAAGTTCAGAACATTTTCTTCGAGTGCTCTTCTGATGTATCTTGCCACACGAGACCT-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 266109.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LAMA2	NM_000426.4	c.6993_7155del	p.Ser2331ArgfsTer5	splice_acceptor_variant, coding_sequence_variant	50/65	ENST00000421865.3
LAMA2	NM_001079823.2	c.6993_7155del	p.Ser2331ArgfsTer5	splice_acceptor_variant, coding_sequence_variant	50/64

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LAMA2	ENST00000421865.3	c.6993_7155del	p.Ser2331ArgfsTer5	splice_acceptor_variant, coding_sequence_variant	50/65	5	NM_000426.4
	ENST00000665046.1	n.976-23199_976-23037del		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Merosin deficient congenital muscular dystrophy Pathogenic:1

Likely pathogenic, criteria provided, single submitter

research

Diagnostics Division, CENTRE FOR DNA FINGERPRINTING AND DIAGNOSTICS

Jan 01, 2014

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Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1554301637; hg19: chr6-129785433;