Genetic Variant CASTOR1:p.Ser116Cys (chr22-30287398-G-C) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_001037666.3(CASTOR1):c.347C>G(p.Ser116Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000248 in 1,613,022 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: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

CASTOR1
NM_001037666.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 10.0

Variant links:

Genes affected

CASTOR1 (HGNC:34423): (cytosolic arginine sensor for mTORC1 subunit 1) Enables arginine binding activity and identical protein binding activity. Involved in cellular response to L-arginine and negative regulation of TORC1 signaling. Located in cytosol. Colocalizes with GATOR2 complex. [provided by Alliance of Genome Resources, Apr 2022]

CASTOR1 links:

ENSG00000248751 (HGNC:):

ENSG00000248751 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.857

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CASTOR1	NM_001037666.3 link	c.347C>G	p.Ser116Cys	missense_variant	Exon 3 of 9	ENST00000407689.8	NP_001032755.1	Q8WTX7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CASTOR1	ENST00000407689.8 link	c.347C>G	p.Ser116Cys	missense_variant	Exon 3 of 9	1	NM_001037666.3	ENSP00000384183.4		Q8WTX7
ENSG00000248751	ENST00000434291.5 link	c.914C>G	p.Ser305Cys	missense_variant	Exon 8 of 13	2		ENSP00000401535.1		H7C1Q1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152258

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1460764

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726654

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

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:

0.0000131

AC:

AN:

152258

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74392

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 16, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.347C>G (p.S116C) alteration is located in exon 3 (coding exon 3) of the GATSL3 gene. This alteration results from a C to G substitution at nucleotide position 347, causing the serine (S) at amino acid position 116 to be replaced by a cysteine (C). 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

Pathogenic

0.97

BayesDel_addAF

Uncertain

0.16

BayesDel_noAF

Uncertain

-0.010

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.45

T;T;.

Eigen

Pathogenic

1.0

Eigen_PC

Pathogenic

0.98

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.94

D;D;D

M_CAP

Benign

0.074

MetaRNN

Pathogenic

0.86

D;D;D

MetaSVM

Benign

-0.43

PROVEAN

Uncertain

-4.1

D;D;N

REVEL

Uncertain

0.59

Sift

Pathogenic

0.0

D;D;D

Sift4G

Pathogenic

0.0

D;D;D

Polyphen

1.0

D;D;.

Vest4

0.94

MutPred

0.78

Gain of catalytic residue at M114 (P = 0.001);Gain of catalytic residue at M114 (P = 0.001);.;

MVP

0.57

MPC

1.4

ClinPred

1.0

GERP RS

5.5

Varity_R

0.84

gMVP

0.92

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