NM_001143981.2:c.782G>T

Variant names:

• chrX-110688800-C-A
• rs387906713
• NM_001143981.2:c.782G>T

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM2 PP3_Strong PP5

The NM_001143981.2(CHRDL1):​c.782G>T​(p.Cys261Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000922 in 1,084,441 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency:
  • Genomes: not found (cov: 20)
  • Exomes 𝑓: 9.2e-7 (0 hom. 1 hem.)
• Consequence: CHRDL1 NM_001143981.2 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.56
• Publications: 2 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: Likely_pathogenic. The variant received 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.994
• PP5: Variant X-110688800-C-A is Pathogenic according to our data. Variant chrX-110688800-C-A is described in ClinVar as Pathogenic. ClinVar VariationId is 29958.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.782G>T	p.Cys261Phe	missense	Exon 9 of 12	NP_001137453.1
	CHRDL1	NM_001367204.1		c.782G>T	p.Cys261Phe	missense	Exon 9 of 12	NP_001354133.1
	CHRDL1	NM_001143982.2		c.779G>T	p.Cys260Phe	missense	Exon 9 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.782G>T	p.Cys261Phe	missense	Exon 9 of 12	ENSP00000361112.1
	CHRDL1	ENST00000444321.2	TSL:1	c.779G>T	p.Cys260Phe	missense	Exon 9 of 12	ENSP00000399739.2
	CHRDL1	ENST00000372045.5	TSL:1	c.761G>T	p.Cys254Phe	missense	Exon 9 of 12	ENSP00000361115.1

Frequencies

GnomAD3 genomes Cov.: 20

GnomAD4 exome AF: 9.22e-7 AC: 1 AN: 1084441 Hom.: 0 Cov.: 28 AF XY: 0.00000285 AC XY: 1 AN XY: 350593

African (AFR) AF: 0.00 AC: 0 AN: 26113

American (AMR) AF: 0.00 AC: 0 AN: 35188

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19304

East Asian (EAS) AF: 0.00 AC: 0 AN: 30152

South Asian (SAS) AF: 0.00 AC: 0 AN: 53760

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40499

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3613

European-Non Finnish (NFE) AF: 0.00000120 AC: 1 AN: 830206

Other (OTH) AF: 0.00 AC: 0 AN: 45606

GnomAD4 genome Cov.: 20

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
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.73	D
BayesDel_noAF	Pathogenic	0.81
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.65	D
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.90	D
M_CAP	Pathogenic	0.98	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	4.4	H
PhyloP100		7.6
PrimateAI	Pathogenic	0.90	D
PROVEAN	Pathogenic	-7.5	D
REVEL	Pathogenic	0.98
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.97
MutPred		0.96		Gain of methylation at K249 (P = 0.0797)
MVP		0.91
MPC		1.4
ClinPred		1.0	D
GERP RS		4.8
Varity_R		0.99
gMVP		0.95
Mutation Taster		=2/98	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: rs387906713; hg19: chrX-109932028;