14-22812899-C-T

Variant names:

• chr14-22812899-C-T
• rs386833817
• NM_003982.4:c.499+1G>A

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PVS1_Strong PM2 PP5_Moderate

The NM_003982.4(SLC7A7):​c.499+1G>A variant causes a splice donor, intron change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 29)
• Consequence: SLC7A7 NM_003982.4 splice_donor, intron
• Scores: Splicing: ADA: 1.000
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 7.91
• Publications: 0 publications found

Genes affected

SLC7A7 (HGNC:11065): (solute carrier family 7 member 7) The protein encoded by this gene is the light subunit of a cationic amino acid transporter. This sodium-independent transporter is formed when the light subunit encoded by this gene dimerizes with the heavy subunit transporter protein SLC3A2. This transporter is found in epithelial cell membranes where it transfers cationic and large neutral amino acids from the cell to the extracellular space. Defects in this gene are a cause of lysinuric protein intolerance (LPI). Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2011]

SLC7A7 Gene-Disease associations (from GenCC):

• lysinuric protein intolerance

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, Ambry Genetics, ClinGen, Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, product NOT destroyed by NMD, known LOF gene, truncates exone, which is 0.35221353 fraction of the gene. Cryptic splice site detected, with MaxEntScore 4.4, offset of 15, new splice context is: gggGTagga. Cryptic site results in inframe change. If cryptic site found is not functional and variant results in exon loss, it results in frameshift change.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 14-22812899-C-T is Pathogenic according to our data. Variant chr14-22812899-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 56369.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003982.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC7A7	NM_003982.4	MANE Select	c.499+1G>A		splice_donor intron	N/A	NP_003973.3
	SLC7A7	NM_001126105.3		c.499+1G>A		splice_donor intron	N/A	NP_001119577.1	A0A0S2Z502
	SLC7A7	NM_001126106.4		c.499+1G>A		splice_donor intron	N/A	NP_001119578.1	Q9UM01

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC7A7	ENST00000674313.1	MANE Select	c.499+1G>A		splice_donor intron	N/A	ENSP00000501493.1	Q9UM01
	SLC7A7	ENST00000397528.8	TSL:1	c.499+1G>A		splice_donor intron	N/A	ENSP00000380662.4	Q9UM01
	SLC7A7	ENST00000397529.6	TSL:1	c.499+1G>A		splice_donor intron	N/A	ENSP00000380663.2	Q9UM01

Frequencies

GnomAD3 genomes Cov.: 29

GnomAD2 exomes AF: 0.00 AC: 0 AN: 246412 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 29

ExAC AF: 0.00000824 AC: 1

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
2	-	-	Lysinuric protein intolerance (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.36
CADD	Pathogenic	32
DANN	Uncertain	0.99
Eigen	Pathogenic	1.2
Eigen_PC	Pathogenic	1.1
FATHMM_MKL	Uncertain	0.94	D
PhyloP100		7.9
GERP RS		5.7
Mutation Taster		=1/99	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.94
SpliceAI score (max)		0.99		Details are displayed if max score is > 0.2
DS_DL_spliceai		0.99		Position offset: 1

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

Other links and lift over

dbSNP: rs386833817; hg19: chr14-23282108;