rs28935174

Variant names:

• chrX-48527256-G-A
• rs28935174
• NM_006579.3:c.440G>A

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PM1 PM2 PM5 PP3_Strong PP5_Very_Strong

The NM_006579.3(EBP):​c.440G>A​(p.Arg147His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R147S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 23)
• Consequence: EBP NM_006579.3 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:6
• Conservation: PhyloP100: 8.98
• Publications: 12 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: Pathogenic. The variant received 18 ACMG points.

• PM1: In a domain EXPERA (size 143) in uniprot entity EBP_HUMAN there are 27 pathogenic changes around while only 10 benign (73%) in NM_006579.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chrX-48527255-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 265110.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.994
• PP5: Variant X-48527256-G-A is Pathogenic according to our data. Variant chrX-48527256-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 11492.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 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.440G>A	p.Arg147His	missense	Exon 4 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.440G>A	p.Arg147His	missense	Exon 4 of 5	ENSP00000417052.1	Q15125
	ENSG00000286268	ENST00000651615.1		c.440G>A	p.Arg147His	missense	Exon 4 of 7	ENSP00000498524.1	A0A494C0F3
	EBP	ENST00000882073.1		c.440G>A	p.Arg147His	missense	Exon 5 of 6	ENSP00000552132.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD2 exomes AF: 0.00000545 AC: 1 AN: 183409 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000122

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 23

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
4	-	-	Chondrodysplasia punctata 2 X-linked dominant (4)
1	-	-	Chondrodysplasia punctata 2 X-linked dominant;C4085243:MEND syndrome (1)
1	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.45
BayesDel_addAF	Pathogenic	0.72	D
BayesDel_noAF	Pathogenic	0.79
CADD	Uncertain	25
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.99	D
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.84	T
M_CAP	Pathogenic	0.91	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.3	M
PhyloP100		9.0
PrimateAI	Benign	0.39	T
PROVEAN	Pathogenic	-4.8	D
REVEL	Pathogenic	0.95
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0030	D
Polyphen		1.0	D
Vest4		0.93
MutPred		0.97		Loss of methylation at R142 (P = 0.1043)
MVP		1.0
MPC		1.8
ClinPred		0.99	D
GERP RS		5.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.94
gMVP		0.94
Mutation Taster		=15/85	disease causing (ClinVar)

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: rs28935174; hg19: chrX-48385644; COSMIC: COSV99339273; COSMIC: COSV99339273;