Genetic Variant NM_016309.3:c.383C>T (chr16-25140226-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_016309.3(LCMT1):c.383C>T(p.Thr128Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000218 in 1,604,004 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000020 ( 0 hom. )

Consequence

LCMT1
NM_016309.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.41

Publications

0 publications found

Variant links:

Genes affected

LCMT1 (HGNC:17557): (leucine carboxyl methyltransferase 1) LCMT1 catalyzes the methylation of the carboxyl group of the C-terminal leucine residue (leu309) of the catalytic subunit of protein phosphatase-2A (PPP2CA; MIM 176915) (De Baere et al., 1999 [PubMed 10600115]).[supplied by OMIM, Mar 2008]

LCMT1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.20212546).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LCMT1	NM_016309.3 link	c.383C>T	p.Thr128Met	missense_variant	Exon 4 of 11	ENST00000399069.8	NP_057393.2	Q9UIC8-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
LCMT1	ENST00000399069.8 link	c.383C>T	p.Thr128Met	missense_variant	Exon 4 of 11	1	NM_016309.3	ENSP00000382021.3	Q9UIC8-1
LCMT1	ENST00000380962.9 link	n.*240C>T		non_coding_transcript_exon_variant	Exon 5 of 12	2		ENSP00000370349.5	H7BYF0
LCMT1	ENST00000380962.9 link	n.*240C>T		3_prime_UTR_variant	Exon 5 of 12	2		ENSP00000370349.5	H7BYF0

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152118

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000966

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000514

AC:

AN:

233346

AF XY:

0.0000397

show subpopulations

Gnomad AFR exome

AF:

0.000211

Gnomad AMR exome

AF:

0.000122

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000587

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000286

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000200

AC:

AN:

1451886

Hom.:

Cov.:

AF XY:

0.0000180

AC XY:

AN XY:

721048

show subpopulations

African (AFR)

AF:

0.000120

AC:

AN:

33354

American (AMR)

AF:

0.0000922

AC:

AN:

43378

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25882

East Asian (EAS)

AF:

0.0000506

AC:

AN:

39500

South Asian (SAS)

AF:

0.0000119

AC:

AN:

84112

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52956

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5756

European-Non Finnish (NFE)

AF:

0.0000163

AC:

AN:

1106846

Other (OTH)

AF:

0.00

AC:

AN:

60102

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.441

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152118

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74310

show subpopulations

African (AFR)

AF:

0.0000966

AC:

AN:

41408

American (AMR)

AF:

0.00

AC:

AN:

15272

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5198

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10594

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68030

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.567

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000113

Hom.:

Bravo

AF:

0.0000378

ExAC

AF:

0.0000414

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 06, 2021

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.383C>T (p.T128M) alteration is located in exon 4 (coding exon 4) of the LCMT1 gene. This alteration results from a C to T substitution at nucleotide position 383, causing the threonine (T) at amino acid position 128 to be replaced by a methionine (M). 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

-0.33

BayesDel_noAF

Benign

-0.43

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.19

T;.;.

Eigen

Benign

0.11

Eigen_PC

Benign

-0.0049

FATHMM_MKL

Uncertain

0.87

LIST_S2

Uncertain

0.89

D;D;D

M_CAP

Benign

0.020

MetaRNN

Benign

0.20

T;T;T

MetaSVM

Benign

-0.97

MutationAssessor

Benign

1.8

L;L;.

PhyloP100

3.4

PrimateAI

Benign

0.47

PROVEAN

Benign

-1.7

N;N;.

REVEL

Benign

0.079

Sift

Uncertain

0.0030

D;D;.

Sift4G

Uncertain

0.011

D;D;D

Polyphen

1.0

D;D;.

Vest4

0.26

MutPred

0.43

Gain of methylation at K130 (P = 0.1109);Gain of methylation at K130 (P = 0.1109);.;

MVP

0.59

MPC

0.35

ClinPred

0.11

GERP RS

4.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.27

gMVP

0.33

Mutation Taster

=75/25

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.17

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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NM_016309.3:c.383C>T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over