1-52373362-T-G

Variant names:

• chr1-52373362-T-G
• rs587780411
• NM_004153.4:c.2405A>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_004153.4(ORC1):​c.2405A>C​(p.His802Pro) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,648 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. H802R) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: ORC1 NM_004153.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.72
• Publications: 0 publications found

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: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
• Meier-Gorlin syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.928

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004153.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ORC1	NM_004153.4	MANE Select	c.2405A>C	p.His802Pro	missense	Exon 17 of 17	NP_004144.2
	ORC1	NM_001190818.2		c.2405A>C	p.His802Pro	missense	Exon 17 of 17	NP_001177747.1	Q13415
	ORC1	NM_001190819.2		c.2390A>C	p.His797Pro	missense	Exon 17 of 17	NP_001177748.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ORC1	ENST00000371568.8	TSL:1 MANE Select	c.2405A>C	p.His802Pro	missense	Exon 17 of 17	ENSP00000360623.3	Q13415
	ORC1	ENST00000371566.1	TSL:1	c.2405A>C	p.His802Pro	missense	Exon 17 of 17	ENSP00000360621.1	Q13415
	ORC1	ENST00000959732.1		c.2405A>C	p.His802Pro	missense	Exon 16 of 16	ENSP00000629791.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461648 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 727120

African (AFR) AF: 0.00 AC: 0 AN: 33476

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53352

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111850

Other (OTH) AF: 0.00 AC: 0 AN: 60392

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.21	D
BayesDel_noAF	Uncertain	0.060
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Benign	0.29	T
Eigen	Pathogenic	0.70
Eigen_PC	Pathogenic	0.67
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.85	T
M_CAP	Benign	0.041	D
MetaRNN	Pathogenic	0.93	D
MetaSVM	Benign	-0.67	T
MutationAssessor	Uncertain	2.7	M
PhyloP100		5.7
PrimateAI	Uncertain	0.65	T
PROVEAN	Pathogenic	-6.6	D
REVEL	Uncertain	0.49
Sift	Uncertain	0.024	D
Sift4G	Uncertain	0.024	D
Polyphen		1.0	D
Vest4		0.86
MutPred		0.77		Gain of phosphorylation at Y799 (P = 0.1311)
MVP		0.82
MPC		0.81
ClinPred		0.99	D
GERP RS		5.3
Varity_R		0.99
gMVP		0.88
Mutation Taster		=18/82	disease causing

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

Other links and lift over

dbSNP: rs587780411; hg19: chr1-52839034; COSMIC: COSV65364106; COSMIC: COSV65364106;