NM_006579.3:c.201_203dupCTG

Variant names:

• chrX-48523969-G-GTGC
• rs797045542
• NM_006579.3:c.201_203dupCTG

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM1 PM2 PM4_Supporting PP5_Moderate

The NM_006579.3(EBP):​c.201_203dupCTG​(p.Cys67dup) variant causes a disruptive inframe insertion change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency: Genomes: not found (cov: 22)
• Consequence: EBP NM_006579.3 disruptive_inframe_insertion
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 3.31
• Publications: 0 publications found

Genes affected

EBP (HGNC:3133): (EBP cholestenol delta-isomerase) The protein encoded by this gene is an integral membrane protein of the endoplasmic reticulum. It is a high affinity binding protein for the antiischemic phenylalkylamine Ca2+ antagonist [3H]emopamil and the photoaffinity label [3H]azidopamil. It is similar to sigma receptors and may be a member of a superfamily of high affinity drug-binding proteins in the endoplasmic reticulum of different tissues. This protein shares structural features with bacterial and eukaryontic drug transporting proteins. It has four putative transmembrane segments and contains two conserved glutamate residues which may be involved in the transport of cationic amphiphilics. Another prominent feature of this protein is its high content of aromatic amino acid residues (>23%) in its transmembrane segments. These aromatic amino acid residues have been suggested to be involved in the drug transport by the P-glycoprotein. Mutations in this gene cause Chondrodysplasia punctata 2 (CDPX2; also known as Conradi-Hunermann syndrome). [provided by RefSeq, Jul 2008]

EBP Gene-Disease associations (from GenCC):

• chondrodysplasia punctata 2, X-linked dominant

  Inheritance: XL Classification: DEFINITIVE Submitted by: Illumina
• MEND syndrome

  Inheritance: XL Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Genomics England PanelApp, ClinGen
• X-linked chondrodysplasia punctata 2

  Inheritance: XL Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, G2P

ENSG00000286268 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

• PM1: In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 7 uncertain in NM_006579.3
• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_006579.3. Strenght limited to Supporting due to length of the change: 1aa.
• PP5: Variant X-48523969-G-GTGC is Pathogenic according to our data. Variant chrX-48523969-G-GTGC is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 210901.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006579.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EBP	NM_006579.3	MANE Select	c.201_203dupCTG	p.Cys67dup	disruptive_inframe_insertion	Exon 2 of 5	NP_006570.1	Q15125

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EBP	ENST00000495186.6	TSL:1 MANE Select	c.201_203dupCTG	p.Cys67dup	disruptive_inframe_insertion	Exon 2 of 5	ENSP00000417052.1	Q15125
	ENSG00000286268	ENST00000651615.1		c.201_203dupCTG	p.Cys67dup	disruptive_inframe_insertion	Exon 2 of 7	ENSP00000498524.1	A0A494C0F3
	EBP	ENST00000882073.1		c.201_203dupCTG	p.Cys67dup	disruptive_inframe_insertion	Exon 3 of 6	ENSP00000552132.1

Frequencies

GnomAD3 genomes Cov.: 22

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 22

ClinVar

ClinVar submissions

Significance: Likely pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
1	-	-	Chondrodysplasia punctata 2 X-linked dominant (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		3.3
Mutation Taster		=37/63	disease causing (ClinVar)

Splicing

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

Other links and lift over

dbSNP: rs797045542; hg19: chrX-48382357;