3-184381740-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001304473.2(CHRD):​c.-546C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,836 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)
Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

CHRD
NM_001304473.2 5_prime_UTR_premature_start_codon_gain

Scores

1
7
11

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.28
Variant links:
Genes affected
CHRD (HGNC:1949): (chordin) This gene encodes a secreted protein that dorsalizes early vertebrate embryonic tissues by binding to ventralizing TGF-beta-like bone morphogenetic proteins and sequestering them in latent complexes. The encoded protein may also have roles in organogenesis and during adulthood. It has been suggested that this gene could be a candidate gene for Cornelia de Lange syndrome. Reduced expression of this gene results in enhanced bone regeneration. Alternative splicing results in multiple transcript variants. Other alternative splice variants have been described but their full length sequence has not been determined. [provided by RefSeq, Jan 2015]
THPO (HGNC:11795): (thrombopoietin) Megakaryocytopoiesis is the cellular development process that leads to platelet production. The main functional protein encoded by this gene is a humoral growth factor that is necessary for megakaryocyte proliferation and maturation, as well as for thrombopoiesis. This protein is the ligand for MLP/C_MPL, the product of myeloproliferative leukemia virus oncogene. Mutations in this gene are the cause of thrombocythemia 1. Alternative promoter usage and differential splicing result in multiple transcript variants differing in the 5' UTR and/or coding region. Multiple AUG codons upstream of the main open reading frame (ORF) have been identified, and these upstream AUGs inhibit translation of the main ORF at different extent. [provided by RefSeq, Feb 2014]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2
Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
CHRDNM_003741.4 linkc.536C>T p.Pro179Leu missense_variant Exon 5 of 23 ENST00000204604.6 NP_003732.2 Q9H2X0-1Q8N2W7

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
CHRDENST00000204604.6 linkc.536C>T p.Pro179Leu missense_variant Exon 5 of 23 1 NM_003741.4 ENSP00000204604.1 Q9H2X0-1

Frequencies

GnomAD3 genomes
Cov.:
32
GnomAD4 exome
AF:
6.85e-7
AC:
1
AN:
1460836
Hom.:
0
Cov.:
35
AF XY:
0.00000138
AC XY:
1
AN XY:
726750
show subpopulations
Gnomad4 AFR exome
AF:
0.00
Gnomad4 AMR exome
AF:
0.00
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.00
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
8.99e-7
Gnomad4 OTH exome
AF:
0.00
GnomAD4 genome
Cov.:
32

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

not specified Uncertain:1
Feb 19, 2025
Ambry Genetics
Significance: Uncertain significance
Review Status: criteria provided, single submitter
Collection Method: clinical testing

The c.536C>T (p.P179L) alteration is located in exon 5 (coding exon 5) of the CHRD gene. This alteration results from a C to T substitution at nucleotide position 536, causing the proline (P) at amino acid position 179 to be replaced by a leucine (L). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.10
BayesDel_addAF
Benign
-0.084
T
BayesDel_noAF
Benign
-0.36
CADD
Uncertain
24
DANN
Uncertain
0.99
DEOGEN2
Uncertain
0.76
D;.;.
Eigen
Benign
0.032
Eigen_PC
Benign
0.18
FATHMM_MKL
Uncertain
0.93
D
LIST_S2
Uncertain
0.89
D;D;D
M_CAP
Benign
0.025
T
MetaRNN
Uncertain
0.62
D;D;D
MetaSVM
Benign
-1.0
T
MutationAssessor
Benign
1.5
L;.;L
PrimateAI
Pathogenic
0.84
D
PROVEAN
Uncertain
-4.0
D;D;D
REVEL
Benign
0.10
Sift
Uncertain
0.0060
D;D;D
Sift4G
Benign
0.098
T;T;T
Polyphen
0.48
P;B;.
Vest4
0.66
MutPred
0.45
Gain of glycosylation at S181 (P = 0.0455);Gain of glycosylation at S181 (P = 0.0455);Gain of glycosylation at S181 (P = 0.0455);
MVP
0.73
MPC
0.37
ClinPred
0.98
D
GERP RS
4.4
RBP_binding_hub_radar
0.92
RBP_regulation_power_radar
2.0
Varity_R
0.23
gMVP
0.65

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr3-184099528; API