chr19-53882571-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 1P and 1B. PP2BP4

The NM_002739.5(PRKCG):​c.77G>A​(p.Arg26Lys) variant causes a missense change. The variant allele was found at a frequency of 0.0000564 in 1,613,954 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R26G) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 31)
Exomes 𝑓: 0.000058 ( 0 hom. )

Consequence

PRKCG
NM_002739.5 missense

Scores

3
2
14

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.05
Variant links:
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]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PP2
Missense variant in gene, where missense usually causes diseases (based on misZ statistic), PRKCG. . Gene score misZ 3.0601 (greater than the threshold 3.09). Trascript score misZ 3.8304 (greater than threshold 3.09). GenCC has associacion of gene with spinocerebellar ataxia type 14.
BP4
Computational evidence support a benign effect (MetaRNN=0.28822452).

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE UniProt
PRKCGNM_002739.5 linkuse as main transcriptc.77G>A p.Arg26Lys missense_variant 1/18 ENST00000263431.4
PRKCGNM_001316329.2 linkuse as main transcriptc.77G>A p.Arg26Lys missense_variant 1/19
PRKCGXM_047439092.1 linkuse as main transcriptc.-308G>A 5_prime_UTR_variant 2/20

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Appris UniProt
PRKCGENST00000263431.4 linkuse as main transcriptc.77G>A p.Arg26Lys missense_variant 1/181 NM_002739.5 P1P05129-1

Frequencies

GnomAD3 genomes
AF:
0.0000394
AC:
6
AN:
152166
Hom.:
0
Cov.:
31
show subpopulations
Gnomad AFR
AF:
0.00
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.00
Gnomad ASJ
AF:
0.00
Gnomad EAS
AF:
0.00
Gnomad SAS
AF:
0.00
Gnomad FIN
AF:
0.00
Gnomad MID
AF:
0.00
Gnomad NFE
AF:
0.0000882
Gnomad OTH
AF:
0.00
GnomAD3 exomes
AF:
0.0000239
AC:
6
AN:
251238
Hom.:
0
AF XY:
0.0000368
AC XY:
5
AN XY:
135896
show subpopulations
Gnomad AFR exome
AF:
0.00
Gnomad AMR exome
AF:
0.00
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.00
Gnomad SAS exome
AF:
0.00
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.0000528
Gnomad OTH exome
AF:
0.00
GnomAD4 exome
AF:
0.0000581
AC:
85
AN:
1461788
Hom.:
0
Cov.:
63
AF XY:
0.0000605
AC XY:
44
AN XY:
727168
show subpopulations
Gnomad4 AFR exome
AF:
0.0000299
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:
0.0000728
Gnomad4 OTH exome
AF:
0.0000497
GnomAD4 genome
AF:
0.0000394
AC:
6
AN:
152166
Hom.:
0
Cov.:
31
AF XY:
0.0000538
AC XY:
4
AN XY:
74322
show subpopulations
Gnomad4 AFR
AF:
0.00
Gnomad4 AMR
AF:
0.00
Gnomad4 ASJ
AF:
0.00
Gnomad4 EAS
AF:
0.00
Gnomad4 SAS
AF:
0.00
Gnomad4 FIN
AF:
0.00
Gnomad4 NFE
AF:
0.0000882
Gnomad4 OTH
AF:
0.00
Alfa
AF:
0.0000902
Hom.:
0
Bravo
AF:
0.0000302
ExAC
AF:
0.0000247
AC:
3
EpiCase
AF:
0.000109
EpiControl
AF:
0.0000593

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

not provided Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingInvitaeAug 07, 2017This sequence change replaces arginine with lysine at codon 26 of the PRKCG protein (p.Arg26Lys). The arginine residue is moderately conserved and there is a small physicochemical difference between arginine and lysine. This variant is present in population databases (rs763526841, ExAC 0.005%). In summary, this variant has uncertain impact on PRKCG function. The available evidence is currently insufficient to determine its role in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but the clinical significance of these predictions is uncertain. A different missense substitution at this codon (p.Arg26Gly) has been reported to segregate with spinocerebellar ataxia in a large family (PMID: 22675081). This suggests that the Arg26 residue may be important for PRKCG protein function, but this prediction has not been confirmed by published functional studies. This variant has not been reported in the literature in individuals with a PRKCG-related disease. -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
0.66
BayesDel_addAF
Benign
-0.23
T
BayesDel_noAF
Benign
-0.47
CADD
Uncertain
25
DANN
Benign
0.97
DEOGEN2
Benign
0.34
T
Eigen
Benign
0.098
Eigen_PC
Benign
0.17
FATHMM_MKL
Uncertain
0.81
D
LIST_S2
Uncertain
0.93
D
M_CAP
Pathogenic
0.36
D
MetaRNN
Benign
0.29
T
MetaSVM
Benign
-0.56
T
MutationAssessor
Benign
1.2
L
MutationTaster
Benign
0.54
N;N;N
PrimateAI
Pathogenic
0.84
D
PROVEAN
Benign
-1.2
N
REVEL
Benign
0.22
Sift
Benign
0.45
T
Sift4G
Benign
0.57
T
Polyphen
0.34
B
Vest4
0.084
MutPred
0.54
Gain of methylation at R26 (P = 0.027);
MVP
0.76
MPC
1.5
ClinPred
0.23
T
GERP RS
4.1
Varity_R
0.33
gMVP
0.81

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs763526841; hg19: chr19-54385825; COSMIC: COSV54728872; API