19-53891711-T-A

Variant names:

• chr19-53891711-T-A
• rs3745406
• NM_002739.5:c.567T>A

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP2 PP3

The NM_002739.5(PRKCG):​c.567T>A​(p.Asn189Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N189S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: PRKCG NM_002739.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.335
• Publications: 27 publications found

Genes affected

PRKCG (HGNC:9402): (protein kinase C gamma) Protein kinase C (PKC) is a family of serine- and threonine-specific protein kinases that can be activated by calcium and second messenger diacylglycerol. PKC family members phosphorylate a wide variety of protein targets and are known to be involved in diverse cellular signaling pathways. PKC also serve as major receptors for phorbol esters, a class of tumor promoters. Each member of the PKC family has a specific expression profile and is believed to play distinct roles in cells. The protein encoded by this gene is one of the PKC family members. This protein kinase is expressed solely in the brain and spinal cord and its localization is restricted to neurons. It has been demonstrated that several neuronal functions, including long term potentiation (LTP) and long term depression (LTD), specifically require this kinase. Knockout studies in mice also suggest that this kinase may be involved in neuropathic pain development. Defects in this protein have been associated with neurodegenerative disorder spinocerebellar ataxia-14 (SCA14). Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2015]

PRKCG Gene-Disease associations (from GenCC):

• spinocerebellar ataxia type 14

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the PRKCG gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 36 curated pathogenic missense variants (we use a threshold of 10). The gene has 5 curated benign missense variants. Gene score misZ: 3.0601 (below the threshold of 3.09). Trascript score misZ: 3.8304 (above the threshold of 3.09). GenCC associations: The gene is linked to spinocerebellar ataxia type 14.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.754

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002739.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRKCG	NM_002739.5	MANE Select	c.567T>A	p.Asn189Lys	missense	Exon 6 of 18	NP_002730.1	P05129-1
	PRKCG	NM_001316329.2		c.567T>A	p.Asn189Lys	missense	Exon 6 of 19	NP_001303258.1	A0A804HIU5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRKCG	ENST00000263431.4	TSL:1 MANE Select	c.567T>A	p.Asn189Lys	missense	Exon 6 of 18	ENSP00000263431.3	P05129-1
	PRKCG	ENST00000682028.1		c.567T>A	p.Asn189Lys	missense	Exon 6 of 19	ENSP00000507230.1	A0A804HIU5
	PRKCG	ENST00000683513.1		c.567T>A	p.Asn189Lys	missense	Exon 6 of 17	ENSP00000506809.1	A0A804HHY0

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251486 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 52

GnomAD4 genome Cov.: 31

ExAC AF: 0.00000824 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Benign	-0.10	T
BayesDel_noAF	Benign	-0.30
CADD	Benign	23
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.81	D
Eigen	Benign	-0.22
Eigen_PC	Benign	-0.36
FATHMM_MKL	Benign	0.32	N
LIST_S2	Benign	0.82	T
M_CAP	Benign	0.080	D
MetaRNN	Pathogenic	0.75	D
MetaSVM	Uncertain	-0.25	T
MutationAssessor	Uncertain	2.0	M
PhyloP100		-0.34
PrimateAI	Pathogenic	0.81	D
PROVEAN	Pathogenic	-5.4	D
REVEL	Uncertain	0.43
Sift	Uncertain	0.0020	D
Sift4G	Benign	0.068	T
Polyphen		1.0	D
Vest4		0.75
MutPred		0.63		Gain of ubiquitination at N189 (P = 0.0048)
MVP		0.86
MPC		1.4
ClinPred		0.98	D
GERP RS		-1.7
Varity_R		0.70
gMVP		0.88
Mutation Taster		=20/80	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.30		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.30		Position offset: 2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs3745406; hg19: chr19-54394965;