2-178432179-G-C

Position:

• chr2-178432179-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1 PM2 BP4_Moderate

The NM_003690.5(PRKRA):​c.860C>G​(p.Ser287Cys) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. S287S) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 35)
• Consequence: PRKRA NM_003690.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.93

Genes affected

PRKRA (HGNC:9438): (protein activator of interferon induced protein kinase EIF2AK2) This gene encodes a protein kinase activated by double-stranded RNA which mediates the effects of interferon in response to viral infection. Mutations in this gene have been associated with dystonia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2008]

CHROMR (HGNC:54059): (cholesterol induced regulator of metabolism RNA)

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM1: In a modified_residue Phosphoserine (size 0) in uniprot entity PRKRA_HUMAN
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.22681299).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PRKRA	NM_003690.5	c.860C>G	p.Ser287Cys	missense_variant	8/8	ENST00000325748.9
CHROMR	NR_110204.1	n.872-1203G>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PRKRA	ENST00000325748.9	c.860C>G	p.Ser287Cys	missense_variant	8/8	1	NM_003690.5	P1
CHROMR	ENST00000453026.7	n.896-1203G>C		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes Cov.: 35

GnomAD4 exome Cov.: 57

GnomAD4 genome Cov.: 35

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 14, 2024

The c.860C>G (p.S287C) alteration is located in exon 8 (coding exon 8) of the PRKRA gene. This alteration results from a C to G substitution at nucleotide position 860, causing the serine (S) at amino acid position 287 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Uncertain	0.016	T
BayesDel_noAF	Benign	-0.21
CADD	Benign	23
DANN	Benign	0.87
DEOGEN2	Benign	0.22	T;.;.
Eigen	Benign	-0.10
Eigen_PC	Benign	-0.084
FATHMM_MKL	Benign	0.73	D
LIST_S2	Benign	0.84	T;T;T
M_CAP	Benign	0.044	D
MetaRNN	Benign	0.23	T;T;T
MetaSVM	Benign	-0.44	T
MutationAssessor	Benign	1.3	L;.;.
MutationTaster	Benign	1.0	N;N;N;N
PrimateAI	Uncertain	0.59	T
PROVEAN	Benign	-1.7	N;N;N
REVEL	Benign	0.28
Sift	Benign	0.18	T;T;T
Sift4G	Benign	0.15	T;T;T
Polyphen		0.058	B;.;D
Vest4		0.26
MutPred		0.40		Loss of glycosylation at S287 (P = 0.0051);.;.;
MVP		0.86
MPC		0.67
ClinPred		0.24	T
GERP RS		2.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.050
gMVP		0.48

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: chr2-179296906;