NM_004153.4:c.2314G>A

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_004153.4(ORC1):c.2314G>A(p.Val772Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00579 in 1,612,708 control chromosomes in the GnomAD database, including 40 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V772L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0048 ( 1 hom., cov: 32)

Exomes 𝑓: 0.0059 ( 39 hom. )

Consequence

ORC1
NM_004153.4 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:7O:1

Conservation

PhyloP100: -1.02

Publications

8 publications found

Variant links:

Genes affected

ORC1 (HGNC:8487): (origin recognition complex subunit 1) 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 the largest subunit of the ORC complex. While other ORC subunits are stable throughout the cell cycle, the levels of this protein vary during the cell cycle, which has been shown to be controlled by ubiquitin-mediated proteolysis after initiation of DNA replication. This protein is found to be selectively phosphorylated during mitosis. It is also reported to interact with MYST histone acetyltransferase 2 (MyST2/HBO1), a protein involved in control of transcription silencing. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jun 2010]

ORC1 Gene-Disease associations (from GenCC):

Meier-Gorlin syndrome 1
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
Meier-Gorlin syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ORC1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0065743923).

BP6

Variant 1-52374887-C-T is Benign according to our data. Variant chr1-52374887-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 297579.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.00475 (724/152282) while in subpopulation NFE AF = 0.00657 (447/68026). AF 95% confidence interval is 0.00607. There are 1 homozygotes in GnomAd4. There are 372 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 39 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ORC1	NM_004153.4 link	c.2314G>A	p.Val772Ile	missense_variant	Exon 16 of 17	ENST00000371568.8	NP_004144.2	Q13415

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ORC1	ENST00000371568.8 link	c.2314G>A	p.Val772Ile	missense_variant	Exon 16 of 17	1	NM_004153.4	ENSP00000360623.3		Q13415
ORC1	ENST00000371566.1 link	c.2314G>A	p.Val772Ile	missense_variant	Exon 16 of 17	1		ENSP00000360621.1		Q13415

Frequencies

GnomAD3 genomes

AF:

0.00475

AC:

723

AN:

152164

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00104

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00157

Gnomad ASJ

AF:

0.000864

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0193

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00657

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.00489

AC:

1228

AN:

251312

AF XY:

0.00498

show subpopulations

Gnomad AFR exome

AF:

0.00105

Gnomad AMR exome

AF:

0.00113

Gnomad ASJ exome

AF:

0.0000992

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0188

Gnomad NFE exome

AF:

0.00647

Gnomad OTH exome

AF:

0.00440

GnomAD4 exome

AF:

0.00590

AC:

8620

AN:

1460426

Hom.:

Cov.:

AF XY:

0.00574

AC XY:

4170

AN XY:

726668

show subpopulations

African (AFR)

AF:

0.000837

AC:

AN:

33450

American (AMR)

AF:

0.00141

AC:

AN:

44708

Ashkenazi Jewish (ASJ)

AF:

0.000498

AC:

AN:

26122

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.0000580

AC:

AN:

86232

European-Finnish (FIN)

AF:

0.0168

AC:

895

AN:

53412

Middle Eastern (MID)

AF:

0.000347

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.00661

AC:

7337

AN:

1110702

Other (OTH)

AF:

0.00459

AC:

277

AN:

60344

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.466

Heterozygous variant carriers

375

749

1124

1498

1873

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

286

572

858

1144

1430

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00475

AC:

724

AN:

152282

Hom.:

Cov.:

AF XY:

0.00500

AC XY:

372

AN XY:

74460

show subpopulations

African (AFR)

AF:

0.00103

AC:

AN:

41556

American (AMR)

AF:

0.00157

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.000864

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.0193

AC:

205

AN:

10602

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00657

AC:

447

AN:

68026

Other (OTH)

AF:

0.000473

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

Heterozygous variant carriers

113

150

188

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00476

Hom.:

Bravo

AF:

0.00339

TwinsUK

AF:

0.00701

AC:

ALSPAC

AF:

0.00778

AC:

ESP6500AA

AF:

0.00182

AC:

ESP6500EA

AF:

0.00593

AC:

ExAC

AF:

0.00455

AC:

552

EpiCase

AF:

0.00562

EpiControl

AF:

0.00551

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:7Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:3

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

May 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

ORC1: BP4, BS2 -

Jan 30, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Meier-Gorlin syndrome 1

Benign:2Other:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Sep 29, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

GenomeConnect, ClinGen

Significance:not provided

Review Status:no classification provided

Collection Method:phenotyping only

GenomeConnect assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. GenomeConnect staff make no attempt to reinterpret the clinical significance of the variant. -

not specified

Benign:1

Apr 19, 2017

Genetic Services Laboratory, University of Chicago

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

ORC1-related disorder

Benign:1

Jun 27, 2019

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.068

BayesDel_addAF

Benign

-0.69

BayesDel_noAF

Benign

-0.75

CADD

Benign

6.8

(source)

DANN

Benign

0.84

DEOGEN2

Benign

0.0084

T;T

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.11

LIST_S2

Benign

0.61

.;T

MetaRNN

Benign

0.0066

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.1

L;L

PhyloP100

-1.0

PrimateAI

Benign

0.23

PROVEAN

Benign

-0.21

N;N

REVEL

Benign

0.047

Sift

Benign

0.46

T;T

Sift4G

Benign

0.56

T;T

Polyphen

0.0

B;B

Vest4

0.077

MVP

0.17

MPC

0.12

ClinPred

0.0046

GERP RS

-0.62

Varity_R

0.076

gMVP

0.067

Mutation Taster

=99/1

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over