rs780022870

Positions:

• chr8-47864551-G-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP6

The NM_006904.7(PRKDC):​c.5571+5C>T variant causes a splice donor 5th base, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000145 in 1,602,554 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.000072 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00015 (1 hom.)
• Consequence: PRKDC NM_006904.7 splice_donor_5th_base, intron
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: -0.515

Genes affected

PRKDC (HGNC:9413): (protein kinase, DNA-activated, catalytic subunit) This gene encodes the catalytic subunit of the DNA-dependent protein kinase (DNA-PK). It functions with the Ku70/Ku80 heterodimer protein in DNA double strand break repair and recombination. The protein encoded is a member of the PI3/PI4-kinase family.[provided by RefSeq, Jul 2010]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.8).
• BP6: Variant 8-47864551-G-A is Benign according to our data. Variant chr8-47864551-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 379417.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}. Variant chr8-47864551-G-A is described in Lovd as [Likely_benign].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PRKDC	NM_006904.7	c.5571+5C>T		splice_donor_5th_base_variant, intron_variant		ENST00000314191.7	NP_008835.5
PRKDC	NM_001081640.2	c.5571+5C>T		splice_donor_5th_base_variant, intron_variant			NP_001075109.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PRKDC	ENST00000314191.7	c.5571+5C>T		splice_donor_5th_base_variant, intron_variant		1	NM_006904.7	ENSP00000313420	P1
PRKDC	ENST00000338368.7	c.5571+5C>T		splice_donor_5th_base_variant, intron_variant		1		ENSP00000345182
PRKDC	ENST00000546304.1	n.237+5C>T		splice_donor_5th_base_variant, intron_variant, non_coding_transcript_variant		2

Frequencies

GnomAD3 genomes AF: 0.0000723 AC: 11 AN: 152166 Hom.: 0 Cov.: 32

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: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.000118

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.000128 AC: 30 AN: 234806 Hom.: 0 AF XY: 0.000142 AC XY: 18 AN XY: 126676

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000305

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.000106

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000208

Gnomad OTH exome AF: 0.000691

GnomAD4 exome AF: 0.000153 AC: 222 AN: 1450270 Hom.: 1 Cov.: 30 AF XY: 0.000171 AC XY: 123 AN XY: 720286

Gnomad4 AFR exome AF: 0.000240

Gnomad4 AMR exome AF: 0.0000232

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000107

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000140

Gnomad4 OTH exome AF: 0.000334

GnomAD4 genome AF: 0.0000722 AC: 11 AN: 152284 Hom.: 0 Cov.: 32 AF XY: 0.0000671 AC XY: 5 AN XY: 74466

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000118

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.000203 Hom.: 0

Bravo AF: 0.000113

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Severe combined immunodeficiency due to DNA-PKcs deficiency Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 23, 2022

This sequence change falls in intron 41 of the PRKDC gene. It does not directly change the encoded amino acid sequence of the PRKDC protein. It affects a nucleotide within the consensus splice site. This variant is present in population databases (rs780022870, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with PRKDC-related conditions. ClinVar contains an entry for this variant (Variation ID: 379417). Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant is not likely to affect RNA splicing. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

not provided Benign:1

Likely benign, criteria provided, single submitter

clinical testing

GeneDx

Mar 11, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.80
CADD	Benign	0.64
DANN	Benign	0.39

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

Other links and lift over

dbSNP: rs780022870; hg19: chr8-48777112;