17-15229806-C-A

Variant names:

• chr17-15229806-C-A
• rs7415
• NM_000304.4:c.*1111G>T

Variant summary

Our verdict is Benign. The variant received -18 ACMG points: 0P and 18B. BP4_Moderate BP6_Very_Strong BA1

The NM_000304.4(PMP22):​c.*1111G>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0464 in 152,664 control chromosomes in the GnomAD database, including 402 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.046 (402 hom., cov: 33)
  • Exomes 𝑓: 0.0024 (0 hom.)
• Consequence: PMP22 NM_000304.4 3_prime_UTR
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: 3.15
• Publications: 2 publications found

Genes affected

PMP22 (HGNC:9118): (peripheral myelin protein 22) This gene encodes an integral membrane protein that is a major component of myelin in the peripheral nervous system. Studies suggest two alternately used promoters drive tissue-specific expression. Various mutations of this gene are causes of Charcot-Marie-Tooth disease Type IA, Dejerine-Sottas syndrome, and hereditary neuropathy with liability to pressure palsies. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

PMP22 Gene-Disease associations (from GenCC):

• Charcot-Marie-Tooth disease type 1A

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), ClinGen, Laboratory for Molecular Medicine, Ambry Genetics
• hereditary neuropathy with liability to pressure palsies

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, Orphanet
• Charcot-Marie-Tooth disease type 1E

  Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, PanelApp Australia, Orphanet, Labcorp Genetics (formerly Invitae)
• Charcot-Marie-Tooth disease type 3

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -18 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.3).
• BP6: Variant 17-15229806-C-A is Benign according to our data. Variant chr17-15229806-C-A is described in ClinVar as [Likely_benign]. Clinvar id is 321846.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.146 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PMP22	NM_000304.4	c.*1111G>T		3_prime_UTR_variant	Exon 5 of 5	ENST00000312280.9	NP_000295.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PMP22	ENST00000312280.9	c.*1111G>T		3_prime_UTR_variant	Exon 5 of 5	1	NM_000304.4	ENSP00000308937.3

Frequencies

GnomAD3 genomes AF: 0.0464 AC: 7063 AN: 152124 Hom.: 403 Cov.: 33

Gnomad AFR AF: 0.122

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0418

Gnomad ASJ AF: 0.0242

Gnomad EAS AF: 0.154

Gnomad SAS AF: 0.0106

Gnomad FIN AF: 0.000471

Gnomad MID AF: 0.0475

Gnomad NFE AF: 0.00487

Gnomad OTH AF: 0.0436

GnomAD4 exome AF: 0.00237 AC: 1 AN: 422 Hom.: 0 Cov.: 0 AF XY: 0.00391 AC XY: 1 AN XY: 256

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AC: 0 AN: 0

American (AMR) AC: 0 AN: 0

Ashkenazi Jewish (ASJ) AC: 0 AN: 0

East Asian (EAS) AC: 0 AN: 0

South Asian (SAS) AC: 0 AN: 0

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 406

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 10

Other (OTH) AF: 0.167 AC: 1 AN: 6

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome AF: 0.0465 AC: 7079 AN: 152242 Hom.: 402 Cov.: 33 AF XY: 0.0469 AC XY: 3491 AN XY: 74442

African (AFR) AF: 0.122 AC: 5058 AN: 41522

American (AMR) AF: 0.0417 AC: 638 AN: 15300

Ashkenazi Jewish (ASJ) AF: 0.0242 AC: 84 AN: 3470

East Asian (EAS) AF: 0.155 AC: 805 AN: 5184

South Asian (SAS) AF: 0.0110 AC: 53 AN: 4816

European-Finnish (FIN) AF: 0.000471 AC: 5 AN: 10620

Middle Eastern (MID) AF: 0.0476 AC: 14 AN: 294

European-Non Finnish (NFE) AF: 0.00487 AC: 331 AN: 68014

Other (OTH) AF: 0.0431 AC: 91 AN: 2110

Alfa AF: 0.0238 Hom.: 399

Bravo AF: 0.0541

Asia WGS AF: 0.0620 AC: 216 AN: 3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:1

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Hereditary liability to pressure palsies Benign:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Charcot-Marie-Tooth disease, type I Benign:1

Jun 14, 2016

Illumina Laboratory Services, Illumina

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.30
CADD	Benign	16
DANN	Benign	0.92
PhyloP100		3.1
Mutation Taster		=100/0	polymorphism (auto)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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: rs7415; hg19: chr17-15133123; COSMIC: COSV56601929; COSMIC: COSV56601929;