NM_001143981.2:c.652C>T

Variant names:

• chrX-110694289-G-A
• rs387906714
• NM_001143981.2:c.652C>T

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_001143981.2(CHRDL1):​c.652C>T​(p.Arg218*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000912 in 1,096,862 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 9.1e-7 (0 hom. 0 hem.)
• Consequence: CHRDL1 NM_001143981.2 stop_gained
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 0.0860
• Publications: 4 publications found

Genes affected

CHRDL1 (HGNC:29861): (chordin like 1) This gene encodes an antagonist of bone morphogenetic protein 4. The encoded protein may play a role in topographic retinotectal projection and in the regulation of retinal angiogenesis in response to hypoxia. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jan 2009]

CHRDL1 Gene-Disease associations (from GenCC):

• isolated congenital megalocornea

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

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-110694289-G-A is Pathogenic according to our data. Variant chrX-110694289-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 29961.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001143981.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHRDL1	NM_001143981.2	MANE Select	c.652C>T	p.Arg218*	stop_gained	Exon 8 of 12	NP_001137453.1
	CHRDL1	NM_001367204.1		c.652C>T	p.Arg218*	stop_gained	Exon 8 of 12	NP_001354133.1
	CHRDL1	NM_001143982.2		c.649C>T	p.Arg217*	stop_gained	Exon 8 of 12	NP_001137454.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CHRDL1	ENST00000372042.6	TSL:2 MANE Select	c.652C>T	p.Arg218*	stop_gained	Exon 8 of 12	ENSP00000361112.1
	CHRDL1	ENST00000444321.2	TSL:1	c.649C>T	p.Arg217*	stop_gained	Exon 8 of 12	ENSP00000399739.2
	CHRDL1	ENST00000372045.5	TSL:1	c.631C>T	p.Arg211*	stop_gained	Exon 8 of 12	ENSP00000361115.1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 9.12e-7 AC: 1 AN: 1096862 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 362264

African (AFR) AF: 0.00 AC: 0 AN: 26371

American (AMR) AF: 0.00 AC: 0 AN: 35177

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19361

East Asian (EAS) AF: 0.00 AC: 0 AN: 30197

South Asian (SAS) AF: 0.00 AC: 0 AN: 54040

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40513

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4133

European-Non Finnish (NFE) AF: 0.00000119 AC: 1 AN: 841027

Other (OTH) AF: 0.00 AC: 0 AN: 46043

GnomAD4 genome Cov.: 23

Alfa AF: 0.00 Hom.: 0

ClinVar

ClinVar submissions as Germline

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Megalocornea (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.74	D
BayesDel_noAF	Pathogenic	0.58
CADD	Pathogenic	35
DANN	Uncertain	1.0
FATHMM_MKL	Benign	0.62	D
PhyloP100		0.086
Vest4		0.92
GERP RS		3.3
Mutation Taster		=0/200	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: rs387906714; hg19: chrX-109937517;