6-152236946-C-A

Variant names:

• chr6-152236946-C-A
• rs141263831
• NM_182961.4:c.20070G>T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_182961.4(SYNE1):​c.20070G>T​(p.Thr6690Thr) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. T6690T) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SYNE1 NM_182961.4 splice_region, synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.97
• Publications: 0 publications found

Genes affected

SYNE1 (HGNC:17089): (spectrin repeat containing nuclear envelope protein 1) This gene encodes a spectrin repeat containing protein expressed in skeletal and smooth muscle, and peripheral blood lymphocytes, that localizes to the nuclear membrane. Mutations in this gene have been associated with autosomal recessive spinocerebellar ataxia 8, also referred to as autosomal recessive cerebellar ataxia type 1 or recessive ataxia of Beauce. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

SYNE1 Gene-Disease associations (from GenCC):

• autosomal recessive ataxia, Beauce type

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, G2P, Orphanet, Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae)
• arthrogryposis multiplex congenita 3, myogenic type

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• Emery-Dreifuss muscular dystrophy 4, autosomal dominant

  Inheritance: AD Classification: MODERATE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Illumina
• autosomal dominant Emery-Dreifuss muscular dystrophy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• autosomal recessive myogenic arthrogryposis multiplex congenita

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).
• BP7: Synonymous conserved (PhyloP=-1.97 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SYNE1	NM_182961.4	c.20070G>T	p.Thr6690Thr	splice_region_variant, synonymous_variant	Exon 109 of 146	ENST00000367255.10	NP_892006.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SYNE1	ENST00000367255.10	c.20070G>T	p.Thr6690Thr	splice_region_variant, synonymous_variant	Exon 109 of 146	1	NM_182961.4	ENSP00000356224.5
SYNE1	ENST00000423061.6	c.19857G>T	p.Thr6619Thr	splice_region_variant, synonymous_variant	Exon 108 of 146	1		ENSP00000396024.1
SYNE1	ENST00000367256.9	n.3762G>T		splice_region_variant, non_coding_transcript_exon_variant	Exon 24 of 61	1
SYNE1	ENST00000409694.6	n.3654G>T		splice_region_variant, non_coding_transcript_exon_variant	Exon 22 of 59	1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	0.0020
DANN	Benign	0.58
PhyloP100		-2.0

Splicing

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

Other links and lift over

dbSNP: rs141263831; hg19: chr6-152558081;