Table 3 Results of known arrhythmia-, inherited metabolic disease-, mitochondrial disease-, and salt-losing tubulopathy-related variants.

From: Accurate interpretation of genetic variants in sudden unexpected death in infancy by trio-targeted gene-sequencing panel analysis

Case

Gene

Variant

Coordinate

Amino Acids

Zygosity

Heredity

Genetic phenotype

Inheritance

SIFT

PolyPhen-2

dbSNP ID

1

KCNE1

C > C/T

35,821,680

Asp85Asn

Heterozygote

Mother

Long QT syndrome

AD

Deleterious (0.03)

Benign (0.441)

rs1805128

CLCNKB

T > T/C

16,373,054

Ile85Thr

Heterozygote

Father

Bartter syndrome type 3

AR

Deleterious (0)

Benign (0.097)

rs202202425

NDUFS4

A > A/G

52,979,034

Arg171Gly

Heterozygote

Father

Mitochondrial complex I deficiency

AR

Deleterious (0)

Probably damaging (1)

rs200758718

2

CAV3

G > G/A

8,775,602

Val14Ile

Heterozygote

Father

Long QT syndrome

AD

Tolerated-low confidence (0.66)

Benign (0.002)

rs121909281

3

SLC25A3

C > C/G

98,991,805

Leu152Val

Heterozygote

Mother

Mitochondrial phosphate carrier deficiency

AR

tolerated (0.31)

Benign (0.122)

–

MTHFR

G > G/A

11,854,077

Arg473Trp

Heterozygote

Father

Homocystinuria due to MTHFR deficiency

AR

Tolerated (0.38)

Possibly damaging (0.696)

rs750510348

4

MYBPC3

G > G/A

47,371,592

Arg160Trp

Heterozygote

Father

Cardiomyopathy

AD

Deleterious (0)

Probably damaging (0.998)

rs193068692

PDSS2

A > A/C

107,475,829

Phe398Leu

Heterozygote

Mother

Coenzyme Q10 deficiency

AR

Tolerated (0.16)

Possibly damaging (0.632)

rs74325037

GARS

G > G/A

30,673,468

Glu738Lys

Heterozygote

Mother

Neuronopathy (mitochondrial disease)

AR

Deleterious-low confidence (0.01)

Benign (0.175)

rs181251337

CPT1A

A > A/C

68,529,142

Leu630Arg

Heterozygote

Mother

CPT deficiency type IA

AR

Tolerated (0.35)

Benign (0.024)

–

5

AKAP9

A > A/G

91,712,512

Gln2730Arg

Heterozygote

Father

Long QT syndrome

AD

–

Possibly damaging (0.474)

rs80191629

CACNA1C

G > G/A

2,795,380

Arg1993Gln

Heterozygote

Mother

Long QT/Short QT syndrome

AD

–

–

rs190288386

ADCK3

A > A/G

227,152,710

Lys63Glu

Heterozygote

Father

Coenzyme Q10 deficiency

AR

Tolerated-low confidence (0.27)

Benign (0.028)

–

TTC19

T > T/G

15,902,833

Ile26Leu

Heterozygote

Father

Mitochondrial complex III deficiency

AR

tolerated (0.5)

Benign (0.002)

–

7

CACNA1C

G > G/A

2,795,380

Arg1993Gln

Heterozygote

Mother

Long QT/Short QT syndrome

AD

–

–

rs190288386

LRPPRC

C > C/T

44,177,714

Glu559Lys

Heterozygote

Mother

Mitochondrial complex IV deficiency

AR

Tolerated (1)

Benign (0)

–

PUS1

TG > TG/T

132,414,323

Gly20AspfsTer115

Heterozygote

Mother

Myopathy, Lactic acidosis

AR

–

–

–

PCCB

A > A/G

136,046,480

Tyr455Cys

Heterozygote

Mother

Propionicacidemia

AR

Deleterious-low confidence (0)

Probably damaging (0.999)

rs121964961

  1. MTHFR: methylenetetrahydrofolate reductase, CPT: carnitine palmitoyltransferase, AD: autosomal dominant, AR: autosomal recessive.