21-18266029-G-T

Position:

• chr21-18266029-G-T

Variant summary

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

The NM_024944.3(CHODL):​c.813G>T​(p.Met271Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: CHODL NM_024944.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.58

Genes affected

CHODL (HGNC:17807): (chondrolectin) This gene encodes a type I membrane protein with a carbohydrate recognition domain characteristic of C-type lectins in its extracellular portion. In other proteins, this domain is involved in endocytosis of glycoproteins and exogenous sugar-bearing pathogens. This protein localizes predominantly to the perinuclear region. Several transcript variants encoding a few different isoforms have been found for this gene. [provided by RefSeq, Feb 2011]

ACMG classification

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/exons	MANE	Protein	UniProt
CHODL	NM_024944.3	c.813G>T	p.Met271Ile	missense_variant	6/6	ENST00000299295.7	NP_079220.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CHODL	ENST00000299295.7	c.813G>T	p.Met271Ile	missense_variant	6/6	1	NM_024944.3	ENSP00000299295	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

Bravo AF: 0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 18, 2023

The c.813G>T (p.M271I) alteration is located in exon 6 (coding exon 6) of the CHODL gene. This alteration results from a G to T substitution at nucleotide position 813, causing the methionine (M) at amino acid position 271 to be replaced by an isoleucine (I). 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	Pathogenic	0.64
BayesDel_addAF	Uncertain	0.047	T
BayesDel_noAF	Benign	-0.17
CADD	Uncertain	26
DANN	Uncertain	0.99
DEOGEN2	Benign	0.025	.;.;T;.
Eigen	Uncertain	0.64
Eigen_PC	Uncertain	0.62
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.72	.;T;T;T
M_CAP	Benign	0.049	D
MetaRNN	Uncertain	0.44	T;T;T;T
MetaSVM	Benign	-0.72	T
MutationTaster	Benign	1.0	D;D;D;D;N;N;N
PrimateAI	Uncertain	0.69	T
PROVEAN	Benign	-1.1	N;N;N;N
REVEL	Benign	0.12
Sift	Uncertain	0.021	D;D;D;D
Sift4G	Uncertain	0.028	D;D;D;D
Polyphen		0.92	.;.;P;.
Vest4		0.56
MutPred		0.20		.;.;Gain of sheet (P = 0.0266);.;
MVP		0.35
MPC		0.40
ClinPred		0.98	D
GERP RS		5.1
Varity_R		0.49
gMVP		0.35

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

LitVar

Other links and lift over

dbSNP: rs918781595; hg19: chr21-19638346;