chr10-49625629-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 2P and 10B. PM2BP4_StrongBP6BP7BS1

The NM_020549.5(CHAT):c.909C>T(p.His303His) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000541 in 1,581,602 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00046 ( 1 hom. )

Consequence

CHAT
NM_020549.5 synonymous

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:2

Conservation

PhyloP100: -0.0300

Variant links:

Genes affected

CHAT (HGNC:1912): (choline O-acetyltransferase) This gene encodes an enzyme which catalyzes the biosynthesis of the neurotransmitter acetylcholine. This gene product is a characteristic feature of cholinergic neurons, and changes in these neurons may explain some of the symptoms of Alzheimer's disease. Polymorphisms in this gene have been associated with Alzheimer's disease and mild cognitive impairment. Mutations in this gene are associated with congenital myasthenic syndrome associated with episodic apnea. Multiple transcript variants encoding different isoforms have been found for this gene, and some of these variants have been shown to encode more than one isoform. [provided by RefSeq, May 2010]

CHAT links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.57).

BP6

Variant 10-49625629-C-T is Benign according to our data. Variant chr10-49625629-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 497741.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Benign=1, Uncertain_significance=1}.

BP7

Synonymous conserved (PhyloP=-0.03 with no splicing effect.

BS1

Variant frequency is greater than expected in population amr. gnomad4 allele frequency = 0.00127 (194/152334) while in subpopulation AMR AF= 0.00274 (42/15306). AF 95% confidence interval is 0.00224. There are 0 homozygotes in gnomad4. There are 102 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CHAT	NM_020549.5 link	c.909C>T	p.His303His	synonymous_variant	Exon 6 of 15	ENST00000337653.7	NP_065574.4	P28329-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CHAT	ENST00000337653.7 link	c.909C>T	p.His303His	synonymous_variant	Exon 6 of 15	1	NM_020549.5	ENSP00000337103.2		P28329-1

Frequencies

GnomAD3 genomes

AF:

0.00127

AC:

193

AN:

152216

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00263

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00275

Gnomad ASJ

AF:

0.00461

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000265

Gnomad OTH

AF:

0.00335

GnomAD3 exomes

AF:

0.000730

AC:

143

AN:

195844

Hom.:

AF XY:

0.000747

AC XY:

AN XY:

104452

show subpopulations

Gnomad AFR exome

AF:

0.00203

Gnomad AMR exome

AF:

0.00174

Gnomad ASJ exome

AF:

0.00442

Gnomad EAS exome

AF:

0.0000682

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000252

Gnomad OTH exome

AF:

0.00136

GnomAD4 exome

AF:

0.000463

AC:

662

AN:

1429268

Hom.:

Cov.:

AF XY:

0.000465

AC XY:

329

AN XY:

707788

show subpopulations

Gnomad4 AFR exome

AF:

0.00286

Gnomad4 AMR exome

AF:

0.00196

Gnomad4 ASJ exome

AF:

0.00392

Gnomad4 EAS exome

AF:

0.0000262

Gnomad4 SAS exome

AF:

0.0000122

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000289

Gnomad4 OTH exome

AF:

0.000997

GnomAD4 genome

AF:

0.00127

AC:

194

AN:

152334

Hom.:

Cov.:

AF XY:

0.00137

AC XY:

102

AN XY:

74496

show subpopulations

Gnomad4 AFR

AF:

0.00265

Gnomad4 AMR

AF:

0.00274

Gnomad4 ASJ

AF:

0.00461

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000265

Gnomad4 OTH

AF:

0.00331

Alfa

AF:

0.00102

Hom.:

Bravo

AF:

0.00174

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Mar 01, 2023

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

CHAT: BP4, BP7 -

Oct 21, 2016

Eurofins Ntd Llc (ga)

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Familial infantile myasthenia

Benign:1

Jan 23, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.57

CADD

Benign

1.3

DANN

Benign

0.56

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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