X-153688586-G-C

Position:

chrX-153688586-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_005629.4(SLC6A8):c.12G>C(p.Lys4Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000384 in 1,042,912 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K4R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000019 ( 0 hom., 1 hem., cov: 20)

Exomes 𝑓: 0.0000021 ( 0 hom. 0 hem. )

Consequence

SLC6A8
NM_005629.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.0820

Variant links:

Genes affected

SLC6A8 (HGNC:11055): (solute carrier family 6 member 8) The protein encoded by this gene is a plasma membrane protein whose function is to transport creatine into and out of cells. Defects in this gene can result in X-linked creatine deficiency syndrome. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2008]

SLC6A8 links:

PNCK (HGNC:13415): (pregnancy up-regulated nonubiquitous CaM kinase) PNCK is a member of the calcium/calmodulin-dependent protein kinase family of protein serine/threonine kinases (see CAMK1; MIM 604998) (Gardner et al., 2000 [PubMed 10673339]).[supplied by OMIM, Mar 2008]

PNCK links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.13588709).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC6A8	NM_005629.4 linkuse as main transcript	c.12G>C	p.Lys4Asn	missense_variant	1/13	ENST00000253122.10
SLC6A8	NM_001142805.2 linkuse as main transcript	c.12G>C	p.Lys4Asn	missense_variant	1/13

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC6A8	ENST00000253122.10 linkuse as main transcript	c.12G>C	p.Lys4Asn	missense_variant	1/13	1	NM_005629.4	P1	P48029-1
PNCK	ENST00000458354.5 linkuse as main transcript	c.-3+229C>G		intron_variant		3
PNCK	ENST00000480693.1 linkuse as main transcript	n.64+229C>G		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes

AF:

0.0000190

AC:

AN:

105114

Hom.:

Cov.:

AF XY:

0.0000343

AC XY:

AN XY:

29182

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:

0.0000396

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000213

AC:

AN:

937798

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

296840

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:

0.00000264

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000190

AC:

AN:

105114

Hom.:

Cov.:

AF XY:

0.0000343

AC XY:

AN XY:

29182

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:

0.0000396

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Creatine transporter deficiency

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 03, 2024

This sequence change replaces lysine, which is basic and polar, with asparagine, which is neutral and polar, at codon 4 of the SLC6A8 protein (p.Lys4Asn). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with SLC6A8-related conditions. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt SLC6A8 protein function with a negative predictive value of 95%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.19

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.70

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.10

FATHMM_MKL

Benign

0.17

LIST_S2

Benign

0.59

M_CAP

Pathogenic

0.98

MetaRNN

Benign

0.14

MetaSVM

Benign

-0.90

MutationAssessor

Benign

0.0

MutationTaster

Benign

1.0

PrimateAI

Pathogenic

0.89

PROVEAN

Benign

-0.40

REVEL

Benign

0.10

Sift

Benign

0.23

Sift4G

Benign

0.11

Polyphen

0.0010

Vest4

0.20

MutPred

0.22

Loss of ubiquitination at K4 (P = 0.0067);

MVP

0.34

MPC

1.4

ClinPred

0.11

GERP RS

2.6

Varity_R

0.18

gMVP

0.30

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