rs727503775

chr10-110601015-GTTACAGGAACT-G

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PVS1 PP3 PP5

The NM_005445.4(SMC3):c.2536-5_2541del variant causes a splice acceptor, coding sequence, intron change involving the alteration of a conserved nucleotide. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SMC3 NM_005445.4 splice_acceptor, coding_sequence, intron
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.53

Genes affected

SMC3 (HGNC:2468): (structural maintenance of chromosomes 3) This gene belongs to the SMC3 subfamily of SMC proteins. The encoded protein occurs in certain cell types as either an intracellular, nuclear protein or a secreted protein. The nuclear form, known as structural maintenance of chromosomes 3, is a component of the multimeric cohesin complex that holds together sister chromatids during mitosis, enabling proper chromosome segregation. Post-translational modification of the encoded protein by the addition of chondroitin sulfate chains gives rise to the secreted proteoglycan bamacan, an abundant basement membrane protein. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PVS1: Splicing variant, LoF is a know mechanism of disease, Cryptic splice site detected, with MaxEntScore 3.5, offset of 35, new splice context is: agggggtactgttctcacAGcca. Cryptic site results in frameshift change. If cryptic site found is not functional and variant results in exon loss, it results in frameshift change.
• PP3: No computational evidence supports a deleterious effect, but strongly conserved according to phyloP
• PP5: Variant 10-110601015-GTTACAGGAACT-G is Pathogenic according to our data. Variant chr10-110601015-GTTACAGGAACT-G is described in ClinVar as [Pathogenic]. Clinvar id is 180199.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SMC3	NM_005445.4	c.2536-5_2541del		splice_acceptor_variant, coding_sequence_variant, intron_variant	23/29	ENST00000361804.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SMC3	ENST00000361804.5	c.2536-5_2541del		splice_acceptor_variant, coding_sequence_variant, intron_variant	23/29	1	NM_005445.4	P1

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: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Cornelia de Lange syndrome 3;C1854630:Wiedemann-Steiner syndrome Pathogenic:1

Pathogenic, no assertion criteria provided

research

Lupski Lab, Baylor-Hopkins CMG, Baylor College of Medicine

Dec 02, 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: rs727503775; hg19: chr10-112360773;