chr2-200947528-G-A

Position:

• chr2-200947528-G-A

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_006190.5(ORC2):​c.328+2026C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.316 in 152,010 control chromosomes in the GnomAD database, including 10,027 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.32 (10027 hom., cov: 32)
• Consequence: ORC2 NM_006190.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.694

Genes affected

ORC2 (HGNC:8488): (origin recognition complex subunit 2) The origin recognition complex (ORC) is a highly conserved six subunits protein complex essential for the initiation of the DNA replication in eukaryotic cells. Studies in yeast demonstrated that ORC binds specifically to origins of replication and serves as a platform for the assembly of additional initiation factors such as Cdc6 and Mcm proteins. The protein encoded by this gene is a subunit of the ORC complex. This protein forms a core complex with ORC3, -4, and -5. It also interacts with CDC45 and MCM10, which are proteins known to be important for the initiation of DNA replication. This protein has been demonstrated to specifically associate with the origin of replication of Epstein-Barr virus in human cells, and is thought to be required for DNA replication from viral origin of replication. Alternatively spliced transcript variants have been found, one of which is a nonsense-mediated mRNA decay candidate. [provided by RefSeq, Oct 2010]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.95).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.587 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ORC2	NM_006190.5	c.328+2026C>T		intron_variant		ENST00000234296.7	NP_006181.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ORC2	ENST00000234296.7	c.328+2026C>T		intron_variant		1	NM_006190.5	ENSP00000234296	P1
ORC2	ENST00000467605.5	n.474+2026C>T		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes AF: 0.316 AC: 47935 AN: 151892 Hom.: 10002 Cov.: 32

Gnomad AFR AF: 0.593

Gnomad AMI AF: 0.189

Gnomad AMR AF: 0.207

Gnomad ASJ AF: 0.336

Gnomad EAS AF: 0.0127

Gnomad SAS AF: 0.156

Gnomad FIN AF: 0.206

Gnomad MID AF: 0.215

Gnomad NFE AF: 0.224

Gnomad OTH AF: 0.286

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.316 AC: 48017 AN: 152010 Hom.: 10027 Cov.: 32 AF XY: 0.311 AC XY: 23085 AN XY: 74298

Gnomad4 AFR AF: 0.593

Gnomad4 AMR AF: 0.207

Gnomad4 ASJ AF: 0.336

Gnomad4 EAS AF: 0.0127

Gnomad4 SAS AF: 0.155

Gnomad4 FIN AF: 0.206

Gnomad4 NFE AF: 0.224

Gnomad4 OTH AF: 0.291

Alfa AF: 0.266 Hom.: 1297

Bravo AF: 0.327

Asia WGS AF: 0.139 AC: 486 AN: 3474

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.95
CADD	Benign	6.4
DANN	Benign	0.44

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: rs68133847; hg19: chr2-201812251;