chr10-49616541-C-T

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBP6

The NM_020984.4(CHAT):c.-29C>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 0.0000992 in 1,613,232 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 0.000085 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00010 ( 0 hom. )

Consequence

CHAT
NM_020984.4 5_prime_UTR_premature_start_codon_gain

Scores

Clinical Significance

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

Conservation

PhyloP100: 1.57

Publications

5 publications found

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 Gene-Disease associations (from GenCC):

congenital myasthenic syndrome 6
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), ClinGen
presynaptic congenital myasthenic syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

CHAT links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.05212763).

BP6

Variant 10-49616541-C-T is Benign according to our data. Variant chr10-49616541-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 461459.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020984.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CHAT	NM_020549.5	MANE Select	c.326C>T	p.Thr109Met	missense	Exon 2 of 15	NP_065574.4	P28329-1
CHAT	NM_001142929.2		c.-29C>T		5_prime_UTR_premature_start_codon_gain	Exon 2 of 15	NP_001136401.2	P28329-3
CHAT	NM_001142934.2		c.-29C>T		5_prime_UTR_premature_start_codon_gain	Exon 3 of 16	NP_001136406.2	P28329-3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CHAT	ENST00000339797.5	TSL:1	c.-29C>T		5_prime_UTR_premature_start_codon_gain	Exon 2 of 15	ENSP00000343486.1	P28329-3
CHAT	ENST00000337653.7	TSL:1 MANE Select	c.326C>T	p.Thr109Met	missense	Exon 2 of 15	ENSP00000337103.2	P28329-1
CHAT	ENST00000395562.2	TSL:1	c.80C>T	p.Thr27Met	missense	Exon 3 of 16	ENSP00000378929.2	P28329-2

Frequencies

GnomAD3 genomes

AF:

0.0000723

AC:

AN:

152184

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000240

AC:

AN:

249580

AF XY:

0.0000222

show subpopulations

Gnomad AFR exome

AF:

0.000124

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000266

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000101

AC:

147

AN:

1460930

Hom.:

Cov.:

AF XY:

0.0000963

AC XY:

AN XY:

726684

show subpopulations

African (AFR)

AF:

0.000209

AC:

AN:

33432

American (AMR)

AF:

0.00

AC:

AN:

44656

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26126

East Asian (EAS)

AF:

0.0000505

AC:

AN:

39640

South Asian (SAS)

AF:

0.0000465

AC:

AN:

86034

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53384

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000111

AC:

123

AN:

1111550

Other (OTH)

AF:

0.000182

AC:

AN:

60340

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.445

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000854

AC:

AN:

152302

Hom.:

Cov.:

AF XY:

0.0000940

AC XY:

AN XY:

74472

show subpopulations

African (AFR)

AF:

0.000193

AC:

AN:

41558

American (AMR)

AF:

0.00

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5168

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.489

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000119

Hom.:

Bravo

AF:

0.000102

ExAC

AF:

0.0000330

AC:

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

Familial infantile myasthenia (2)

Inborn genetic diseases (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.076

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.36

CADD

Benign

(source)

DANN

Benign

0.77

DEOGEN2

Benign

0.11

Eigen

Benign

-0.75

Eigen_PC

Benign

-0.62

FATHMM_MKL

Benign

0.063

LIST_S2

Benign

0.48

M_CAP

Benign

0.039

MetaRNN

Benign

0.052

MetaSVM

Benign

-0.72

MutationAssessor

Benign

-0.20

PhyloP100

1.6

PrimateAI

Benign

0.34

PROVEAN

Benign

-0.22

REVEL

Benign

0.18

Sift

Benign

0.17

Sift4G

Benign

0.27

Polyphen

0.0010

Vest4

0.12

MVP

0.81

MPC

0.26

ClinPred

0.027

GERP RS

2.8

Varity_R

0.025

gMVP

0.22

Mutation Taster

=92/8

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over