1-241634533-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001381853.1(CHML):c.1234G>A(p.Asp412Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000471 in 1,613,856 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00028 ( 1 hom., cov: 32)

Exomes 𝑓: 0.000023 ( 0 hom. )

Consequence

CHML
NM_001381853.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.18

Variant links:

Genes affected

CHML (HGNC:1941): (CHM like Rab escort protein) The product of the CHML gene supports geranylgeranylation of most Rab proteins and may substitute for REP-1 in tissues other than retina. CHML is localized close to the gene for Usher syndrome type II. [provided by RefSeq, Jul 2008]

CHML links:

OPN3 (HGNC:14007): (opsin 3) Opsins are members of the guanine nucleotide-binding protein (G protein)-coupled receptor superfamily. In addition to the visual opsins, mammals possess several photoreceptive non-visual opsins that are expressed in extraocular tissues. This gene, opsin 3, is strongly expressed in brain and testis and weakly expressed in liver, placenta, heart, lung, skeletal muscle, kidney, and pancreas. The gene may also be expressed in the retina. The protein has the canonical features of a photoreceptive opsin protein. [provided by RefSeq, Jul 2008]

OPN3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.06281918).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CHML	NM_001381853.1 linkuse as main transcript	c.1234G>A	p.Asp412Asn	missense_variant	2/2	ENST00000366553.3
OPN3	NM_014322.3 linkuse as main transcript	c.373+5349G>A		intron_variant		ENST00000366554.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHML	ENST00000366553.3 linkuse as main transcript	c.1234G>A	p.Asp412Asn	missense_variant	2/2	2	NM_001381853.1	P1
OPN3	ENST00000366554.3 linkuse as main transcript	c.373+5349G>A		intron_variant		1	NM_014322.3	P1	Q9H1Y3-1

Frequencies

GnomAD3 genomes

AF:

0.000270

AC:

AN:

152092

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000845

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000136

AC:

AN:

250588

Hom.:

AF XY:

0.0000958

AC XY:

AN XY:

135634

show subpopulations

Gnomad AFR exome

AF:

0.00119

Gnomad AMR exome

AF:

0.000405

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000226

AC:

AN:

1461646

Hom.:

Cov.:

AF XY:

0.0000124

AC XY:

AN XY:

727114

show subpopulations

Gnomad4 AFR exome

AF:

0.000358

Gnomad4 AMR exome

AF:

0.000403

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.000283

AC:

AN:

152210

Hom.:

Cov.:

AF XY:

0.000322

AC XY:

AN XY:

74438

show subpopulations

Gnomad4 AFR

AF:

0.000843

Gnomad4 AMR

AF:

0.000524

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000423

Hom.:

Bravo

AF:

0.000230

ESP6500AA

AF:

0.000681

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000157

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 12, 2024

The c.1234G>A (p.D412N) alteration is located in exon 1 (coding exon 1) of the CHML gene. This alteration results from a G to A substitution at nucleotide position 1234, causing the aspartic acid (D) at amino acid position 412 to be replaced by an asparagine (N). 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

0.11

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.42

Cadd

Uncertain

Dann

Uncertain

1.0

DEOGEN2

Uncertain

0.64

Eigen

Uncertain

0.38

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.86

LIST_S2

Uncertain

0.89

M_CAP

Uncertain

0.10

MetaRNN

Benign

0.063

MetaSVM

Benign

-0.87

MutationAssessor

Uncertain

2.8

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Benign

0.47

PROVEAN

Uncertain

-2.4

REVEL

Benign

0.27

Sift

Benign

0.17

Sift4G

Benign

0.14

Polyphen

0.97

Vest4

0.24

MVP

0.76

MPC

0.15

ClinPred

0.082

GERP RS

4.9

Varity_R

0.24

gMVP

0.62

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over