chr8-74350205-T-TAA

Variant names:

• chr8-74350205-T-TAA
• rs112601241
• ENST00000521872.2:n.110_111dupTT

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP6_Moderate BS1 BS2

The ENST00000521872.2(ENSG00000253596):​n.110_111dupTT variant causes a non coding transcript exon change involving the alteration of a non-conserved nucleotide. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: 𝑓 0.0086 (11 hom., cov: 0)
• Consequence: ENSG00000253596 ENST00000521872.2 non_coding_transcript_exon
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.410
• Publications: 1 publications found

Genes affected

ENSG00000253596 (HGNC:):

GDAP1 (HGNC:15968): (ganglioside induced differentiation associated protein 1) This gene encodes a member of the ganglioside-induced differentiation-associated protein family, which may play a role in a signal transduction pathway during neuronal development. Mutations in this gene have been associated with various forms of Charcot-Marie-Tooth Disease and neuropathy. Two transcript variants encoding different isoforms and a noncoding variant have been identified for this gene. [provided by RefSeq, Feb 2012]

GDAP1 Gene-Disease associations (from GenCC):

• Charcot-Marie-Tooth disease

  Inheritance: SD Classification: DEFINITIVE Submitted by: ClinGen
• Charcot-Marie-Tooth disease axonal type 2K

  Inheritance: AD, AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
• Charcot-Marie-Tooth disease recessive intermediate A

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
• autosomal dominant Charcot-Marie-Tooth disease type 2K

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Charcot-Marie-Tooth disease type 4A

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -10 ACMG points.

• BP6: Variant 8-74350205-T-TAA is Benign according to our data. Variant chr8-74350205-T-TAA is described in ClinVar as [Likely_benign]. Clinvar id is 1202471.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.0086 (1262/146788) while in subpopulation SAS AF = 0.0272 (127/4676). AF 95% confidence interval is 0.0233. There are 11 homozygotes in GnomAd4. There are 625 alleles in the male GnomAd4 subpopulation. Median coverage is 0. This position passed quality control check.
• BS2: High Homozygotes in GnomAd4 at 11 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GDAP1	NM_018972.4	c.-257_-256insAA		upstream_gene_variant		ENST00000220822.12	NP_061845.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GDAP1	ENST00000220822.12	c.-257_-256insAA		upstream_gene_variant		1	NM_018972.4	ENSP00000220822.7

Frequencies

GnomAD3 genomes AF: 0.00859 AC: 1260 AN: 146756 Hom.: 11 Cov.: 0

Gnomad AFR AF: 0.00314

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0119

Gnomad ASJ AF: 0.00868

Gnomad EAS AF: 0.000790

Gnomad SAS AF: 0.0270

Gnomad FIN AF: 0.00615

Gnomad MID AF: 0.0131

Gnomad NFE AF: 0.0107

Gnomad OTH AF: 0.0113

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

GnomAD4 genome AF: 0.00860 AC: 1262 AN: 146788 Hom.: 11 Cov.: 0 AF XY: 0.00876 AC XY: 625 AN XY: 71332

African (AFR) AF: 0.00320 AC: 129 AN: 40256

American (AMR) AF: 0.0119 AC: 177 AN: 14842

Ashkenazi Jewish (ASJ) AF: 0.00868 AC: 30 AN: 3456

East Asian (EAS) AF: 0.000792 AC: 4 AN: 5048

South Asian (SAS) AF: 0.0272 AC: 127 AN: 4676

European-Finnish (FIN) AF: 0.00615 AC: 52 AN: 8452

Middle Eastern (MID) AF: 0.0107 AC: 3 AN: 280

European-Non Finnish (NFE) AF: 0.0107 AC: 717 AN: 66820

Other (OTH) AF: 0.0112 AC: 23 AN: 2052

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Nov 14, 2019

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		-0.41

Splicing

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

Other links and lift over

dbSNP: rs112601241; hg19: chr8-75262440;