chr14-74494082-G-A

Variant names:

• chr14-74494082-G-A
• NM_194279.4:c.104G>A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_194279.4(ISCA2):​c.104G>A​(p.Arg35His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000712 in 1,404,016 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.1e-7 (0 hom.)
• Consequence: ISCA2 NM_194279.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0970

Genes affected

ISCA2 (HGNC:19857): (iron-sulfur cluster assembly 2) The protein encoded by this gene is an A-type iron-sulfur cluster (ISC) protein found in mitochondria. The encoded protein appears to be involved in the maturation of mitochondrial iron-sulfur proteins. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2012]

NPC2 (HGNC:14537): (NPC intracellular cholesterol transporter 2) This gene encodes a protein containing a lipid recognition domain. The encoded protein may function in regulating the transport of cholesterol through the late endosomal/lysosomal system. Mutations in this gene have been associated with Niemann-Pick disease, type C2 and frontal lobe atrophy. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.085526854).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ISCA2	NM_194279.4	c.104G>A	p.Arg35His	missense_variant	Exon 2 of 4	ENST00000556816.6	NP_919255.2
ISCA2	NM_001272007.2	c.104G>A	p.Arg35His	missense_variant	Exon 2 of 3		NP_001258936.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ISCA2	ENST00000556816.6	c.104G>A	p.Arg35His	missense_variant	Exon 2 of 4	1	NM_194279.4	ENSP00000452007.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.12e-7 AC: 1 AN: 1404016 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 694340

Gnomad4 AFR exome AF: 0.00

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: 9.21e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	13
DANN	Uncertain	1.0
DEOGEN2	Benign	0.028	T;T;.
Eigen	Benign	-0.89
Eigen_PC	Benign	-0.90
FATHMM_MKL	Benign	0.078	N
LIST_S2	Benign	0.76	T;T;T
M_CAP	Benign	0.0044	T
MetaRNN	Benign	0.086	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.6	L;.;L
PrimateAI	Benign	0.42	T
PROVEAN	Benign	-1.3	N;N;D
REVEL	Benign	0.035
Sift	Benign	0.034	D;T;D
Sift4G	Benign	0.16	T;T;T
Polyphen		0.0090	B;.;.
Vest4		0.076
MutPred		0.38		Loss of MoRF binding (P = 0.0305);Loss of MoRF binding (P = 0.0305);Loss of MoRF binding (P = 0.0305);
MVP		0.081
MPC		0.70
ClinPred		0.35	T
GERP RS		-0.59
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.090
gMVP		0.28

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: chr14-74960785;