1-52385927-C-T

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.1406G>A(p.Cys469Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00178 in 1,613,606 control chromosomes in the GnomAD database, including 35 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 Benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. C469R) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.010 ( 20 hom., cov: 32)

Exomes 𝑓: 0.00092 ( 15 hom. )

Consequence

ORC1
NM_004153.4 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 0.00100

Publications

9 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=0.0030913353).

BP6

Variant 1-52385927-C-T is Benign according to our data. Variant chr1-52385927-C-T is described in ClinVar as [Benign]. Clinvar id is 129857.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.01 (1526/152272) while in subpopulation AFR AF = 0.0351 (1460/41566). AF 95% confidence interval is 0.0336. There are 20 homozygotes in GnomAd4. There are 718 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 20 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ORC1	NM_004153.4 link	c.1406G>A	p.Cys469Tyr	missense_variant	Exon 9 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.1406G>A	p.Cys469Tyr	missense_variant	Exon 9 of 17	1	NM_004153.4	ENSP00000360623.3		Q13415
ORC1	ENST00000371566.1 link	c.1406G>A	p.Cys469Tyr	missense_variant	Exon 9 of 17	1		ENSP00000360621.1		Q13415

Frequencies

GnomAD3 genomes

AF:

0.0100

AC:

1524

AN:

152154

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0352

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00301

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00766

GnomAD2 exomes

AF:

0.00250

AC:

627

AN:

251278

AF XY:

0.00183

show subpopulations

Gnomad AFR exome

AF:

0.0346

Gnomad AMR exome

AF:

0.00153

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000528

Gnomad OTH exome

AF:

0.000816

GnomAD4 exome

AF:

0.000918

AC:

1342

AN:

1461334

Hom.:

Cov.:

AF XY:

0.000785

AC XY:

571

AN XY:

726982

show subpopulations

African (AFR)

AF:

0.0331

AC:

1107

AN:

33450

American (AMR)

AF:

0.00188

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000696

AC:

AN:

86228

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00130

AC:

AN:

5394

European-Non Finnish (NFE)

AF:

0.0000189

AC:

AN:

1111926

Other (OTH)

AF:

0.00194

AC:

117

AN:

60360

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.463

Heterozygous variant carriers

144

217

289

361

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0100

AC:

1526

AN:

152272

Hom.:

Cov.:

AF XY:

0.00964

AC XY:

718

AN XY:

74454

show subpopulations

African (AFR)

AF:

0.0351

AC:

1460

AN:

41566

American (AMR)

AF:

0.00301

AC:

AN:

15290

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.000207

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68024

Other (OTH)

AF:

0.00758

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

145

217

290

362

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00381

Hom.:

Bravo

AF:

0.0115

ESP6500AA

AF:

0.0300

AC:

132

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00308

AC:

374

Asia WGS

AF:

0.00260

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000178

ClinVar

Significance: Benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

not specified

Benign:1

Jul 02, 2013

Genetic Services Laboratory, University of Chicago

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Meier-Gorlin syndrome 1

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: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 benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.062

BayesDel_addAF

Benign

-0.67

BayesDel_noAF

Benign

-0.71

CADD

Benign

0.37

(source)

DANN

Benign

0.39

DEOGEN2

Benign

0.0052

T;T

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.4

FATHMM_MKL

Benign

0.040

LIST_S2

Benign

0.78

.;T

MetaRNN

Benign

0.0031

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.2

L;L

PhyloP100

0.0010

PrimateAI

Benign

0.25

PROVEAN

Benign

0.010

N;N

REVEL

Benign

0.041

Sift

Benign

0.20

T;T

Sift4G

Uncertain

0.056

T;T

Polyphen

0.0020

B;B

Vest4

0.14

MVP

0.19

MPC

0.26

ClinPred

0.0021

GERP RS

-5.9

Varity_R

0.023

gMVP

0.24

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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1-52385927-C-T

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