4-138223292-T-G

Position:

• chr4-138223292-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_014331.4(SLC7A11):​c.553A>C​(p.Ser185Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000547 in 1,461,374 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: SLC7A11 NM_014331.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.70

Genes affected

SLC7A11 (HGNC:11059): (solute carrier family 7 member 11) This gene encodes a member of a heteromeric, sodium-independent, anionic amino acid transport system that is highly specific for cysteine and glutamate. In this system, designated Xc(-), the anionic form of cysteine is transported in exchange for glutamate. This protein has been identified as the predominant mediator of Kaposi sarcoma-associated herpesvirus fusion and entry permissiveness into cells. Also, increased expression of this gene in primary gliomas (compared to normal brain tissue) was associated with increased glutamate secretion via the XCT channels, resulting in neuronal cell death. [provided by RefSeq, Sep 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SLC7A11	NM_014331.4	c.553A>C	p.Ser185Arg	missense_variant	4/12	ENST00000280612.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SLC7A11	ENST00000280612.9	c.553A>C	p.Ser185Arg	missense_variant	4/12	1	NM_014331.4	P1
SLC7A11	ENST00000509248.1			upstream_gene_variant		5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461374 Hom.: 0 Cov.: 30 AF XY: 0.00000275 AC XY: 2 AN XY: 726972

Gnomad4 AFR exome AF: 0.0000299

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: 0.00000630

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 14, 2024

The c.553A>C (p.S185R) alteration is located in exon 4 (coding exon 4) of the SLC7A11 gene. This alteration results from a A to C substitution at nucleotide position 553, causing the serine (S) at amino acid position 185 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	0.46
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.21
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.32	T
Eigen	Benign	-0.16
Eigen_PC	Benign	0.083
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Uncertain	0.95	D
M_CAP	Benign	0.051	D
MetaRNN	Uncertain	0.58	D
MetaSVM	Benign	-0.41	T
MutationAssessor	Benign	-0.46	N
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.74	T
PROVEAN	Benign	0.92	N
REVEL	Uncertain	0.51
Sift	Benign	0.14	T
Sift4G	Benign	0.57	T
Polyphen		0.0090	B
Vest4		0.84
MutPred		0.54		Gain of MoRF binding (P = 0.0084);
MVP		0.61
MPC		0.82
ClinPred		0.91	D
GERP RS		5.3
Varity_R		0.63
gMVP		0.66

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

Other links and lift over

dbSNP: rs1737860763; hg19: chr4-139144446;