chr7-96170045-G-A

Variant names:

• chr7-96170045-G-A
• rs879255502
• NM_014251.3:c.1311C>T

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_Strong BP7

The NM_014251.3(SLC25A13):​c.1311C>T​(p.Cys437Cys) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000958 in 1,461,676 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000096 (0 hom.)
• Consequence: SLC25A13 NM_014251.3 splice_region, synonymous
• Scores: Splicing: ADA: 0.0006916
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: 2.25
• Publications: 5 publications found

Genes affected

SLC25A13 (HGNC:10983): (solute carrier family 25 member 13) This gene is a member of the mitochondrial carrier family. The encoded protein contains four EF-hand Ca(2+) binding motifs in the N-terminal domain, and localizes to mitochondria. The protein catalyzes the exchange of aspartate for glutamate and a proton across the inner mitochondrial membrane, and is stimulated by calcium on the external side of the inner mitochondrial membrane. Mutations in this gene result in citrullinemia, type II. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2009]

SLC25A13 Gene-Disease associations (from GenCC):

• citrin deficiency

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• citrullinemia, type II, adult-onset

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• citrullinemia type II

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• neonatal intrahepatic cholestasis due to citrin deficiency

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.48).
• BP7: Synonymous conserved (PhyloP=2.25 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC25A13	NM_014251.3	c.1311C>T	p.Cys437Cys	splice_region_variant, synonymous_variant	Exon 13 of 18	ENST00000265631.10	NP_055066.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC25A13	ENST00000265631.10	c.1311C>T	p.Cys437Cys	splice_region_variant, synonymous_variant	Exon 13 of 18	1	NM_014251.3	ENSP00000265631.6

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.0000318 AC: 8 AN: 251256 AF XY: 0.0000295

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000435

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000958 AC: 14 AN: 1461676 Hom.: 0 Cov.: 30 AF XY: 0.00000963 AC XY: 7 AN XY: 727168

African (AFR) AF: 0.00 AC: 0 AN: 33470

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.000227 AC: 9 AN: 39698

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86252

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53414

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1111828

Other (OTH) AF: 0.0000166 AC: 1 AN: 60386

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

Neonatal intrahepatic cholestasis due to citrin deficiency Uncertain:1

Jun 02, 2009

Shenzhen Institute of Pediatrics, Shenzhen Children's Hospital

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Citrin deficiency Uncertain:1

Jan 14, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change affects codon 437 of the SLC25A13 mRNA. It is a 'silent' change, meaning that it does not change the encoded amino acid sequence of the SLC25A13 protein. It affects a nucleotide within the consensus splice site. This variant is present in population databases (no rsID available, gnomAD 0.05%). This variant has been observed in individual(s) with citrin deficiency (PMID: 21507300). ClinVar contains an entry for this variant (Variation ID: 252922). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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
BayesDel_noAF	Benign	-0.48
CADD	Benign	11
DANN	Benign	0.62
PhyloP100		2.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=74/26	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.00069
dbscSNV1_RF	Benign	0.074
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

Other links and lift over

dbSNP: rs879255502; hg19: chr7-95799357;