5-132378412-C-A

Variant names:

• chr5-132378412-C-A
• NM_003060.4:c.428C>A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_003060.4(SLC22A5):​c.428C>A​(p.Pro143Gln) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SLC22A5 NM_003060.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.48

Genes affected

SLC22A5 (HGNC:10969): (solute carrier family 22 member 5) Polyspecific organic cation transporters in the liver, kidney, intestine, and other organs are critical for elimination of many endogenous small organic cations as well as a wide array of drugs and environmental toxins. The encoded protein is a plasma integral membrane protein which functions both as an organic cation transporter and as a sodium-dependent high affinity carnitine transporter. The encoded protein is involved in the active cellular uptake of carnitine. Mutations in this gene are the cause of systemic primary carnitine deficiency (CDSP), an autosomal recessive disorder manifested early in life by hypoketotic hypoglycemia and acute metabolic decompensation, and later in life by skeletal myopathy or cardiomyopathy. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Apr 2015]

ACMG classification

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, 0.852

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC22A5	NM_003060.4	c.428C>A	p.Pro143Gln	missense_variant	Exon 2 of 10	ENST00000245407.8	NP_003051.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC22A5	ENST00000245407.8	c.428C>A	p.Pro143Gln	missense_variant	Exon 2 of 10	1	NM_003060.4	ENSP00000245407.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jun 06, 2023

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: SLC22A5 c.428C>A (p.Pro143Gln) results in a non-conservative amino acid change located in the Major facilitator superfamily domain (IPR020846) of the encoded protein sequence. Three of five in-silico tools predict a damaging effect of the variant on protein function. The variant was absent in 251496 control chromosomes (gnomAD). The available data on variant occurrences in the general population are insufficient to allow any conclusion about variant significance. To our knowledge, no occurrence of c.428C>A in individuals affected with Systemic Primary Carnitine Deficiency and no experimental evidence demonstrating its impact on protein function have been reported. However, a different missense variant affecting the same amino acid (Pro143Leu), is classified as pathogenic by our laboratory, indicating that this residue might be functionally important. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.74
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.090
CADD	Pathogenic	26
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.51	D;.;.
Eigen	Uncertain	0.66
Eigen_PC	Pathogenic	0.68
FATHMM_MKL	Benign	0.64	D
LIST_S2	Uncertain	0.97	D;D;D
M_CAP	Benign	0.075	D
MetaRNN	Pathogenic	0.85	D;D;D
MetaSVM	Benign	-0.75	T
MutationAssessor	Benign	1.5	L;.;.
PrimateAI	Uncertain	0.49	T
PROVEAN	Pathogenic	-7.2	D;D;D
REVEL	Uncertain	0.46
Sift	Uncertain	0.0010	D;D;T
Sift4G	Benign	0.14	T;T;T
Polyphen		1.0	D;.;.
Vest4		0.71
MutPred		0.62		Gain of ubiquitination at K141 (P = 0.1008);.;.;
MVP		0.82
MPC		0.77
ClinPred		0.99	D
GERP RS		5.7
Varity_R		0.86
gMVP		0.79

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr5-131714104;