Genetic Variant THNSL1:p.His138Arg (chr10-25023636-A-G) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_024838.5(THNSL1):c.413A>G(p.His138Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,858 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

THNSL1
NM_024838.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.95

Publications

0 publications found

Variant links:

Genes affected

THNSL1 (HGNC:26160): (threonine synthase like 1)

THNSL1 links:

ENKUR (HGNC:28388): (enkurin, TRPC channel interacting protein) This gene encodes a protein that interacts with calmodulin and several transient receptor potential canonical cation channel proteins. The encoded protein may function as an adaptor to localize signal transduction machinery to calcium channels. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jun 2012]

ENKUR links:

ENSG00000285859 (HGNC:):

ENSG00000285859 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.915

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
THNSL1	NM_024838.5 link	c.413A>G	p.His138Arg	missense_variant	Exon 3 of 3	ENST00000376356.5	NP_079114.3	Q8IYQ7Q9H6P9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
THNSL1	ENST00000376356.5 link	c.413A>G	p.His138Arg	missense_variant	Exon 3 of 3	1	NM_024838.5	ENSP00000365534.4	Q8IYQ7
ENKUR	ENST00000615958.4 link	c.38-27767T>C		intron_variant	Intron 2 of 5	1		ENSP00000478989.1	A0A087WUX1
THNSL1	ENST00000524413.5 link	c.413A>G	p.His138Arg	missense_variant	Exon 3 of 3	3		ENSP00000434887.1	Q8IYQ7
ENSG00000285859	ENST00000648191.1 link	n.336+1728A>G		intron_variant	Intron 3 of 4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461858

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727230

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111998

Other (OTH)

AF:

0.00

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jun 03, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.413A>G (p.H138R) alteration is located in exon 3 (coding exon 1) of the THNSL1 gene. This alteration results from a A to G substitution at nucleotide position 413, causing the histidine (H) at amino acid position 138 to be replaced by an arginine (R). 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

Uncertain

0.39

BayesDel_addAF

Uncertain

0.12

BayesDel_noAF

Uncertain

-0.060

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.039

T;T

Eigen

Uncertain

0.65

Eigen_PC

Pathogenic

0.70

FATHMM_MKL

Uncertain

0.91

LIST_S2

Benign

0.83

.;T

M_CAP

Benign

0.017

MetaRNN

Pathogenic

0.91

D;D

MetaSVM

Benign

-0.83

MutationAssessor

Benign

1.5

L;L

PhyloP100

8.9

PrimateAI

Uncertain

0.75

PROVEAN

Uncertain

-2.8

D;D

REVEL

Uncertain

0.49

Sift

Uncertain

0.0010

D;D

Sift4G

Uncertain

0.0020

D;D

Polyphen

0.99

D;D

Vest4

0.80

MutPred

0.82

Gain of phosphorylation at S141 (P = 0.1064);Gain of phosphorylation at S141 (P = 0.1064);

MVP

0.61

MPC

0.21

ClinPred

0.97

GERP RS

5.7

Varity_R

0.81

gMVP

0.74

Mutation Taster

=64/36

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over