1-33354914-C-G

Variant names:

• chr1-33354914-C-G
• rs1207269080
• NM_001385109.1:c.1316G>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001385109.1(PHC2):​c.1316G>C​(p.Gly439Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000248 in 1,614,084 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. G439G) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: PHC2 NM_001385109.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.19
• Publications: 0 publications found

Genes affected

PHC2 (HGNC:3183): (polyhomeotic homolog 2) In Drosophila melanogaster, the 'Polycomb' group (PcG) of genes are part of a cellular memory system that is responsible for the stable inheritance of gene activity. PcG proteins form a large multimeric, chromatin-associated protein complex. The protein encoded by this gene has homology to the Drosophila PcG protein 'polyhomeotic' (Ph) and is known to heterodimerize with EDR1 and colocalize with BMI1 in interphase nuclei of human cells. The specific function in human cells has not yet been determined. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

PHC2-AS1 (HGNC:40205): (PHC2 antisense RNA 1)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.07075247).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001385109.1. 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
	PHC2	NM_001385109.1	MANE Select	c.1316G>C	p.Gly439Ala	missense	Exon 8 of 15	NP_001372038.1	Q8IXK0-5
	PHC2	NM_001385112.1		c.1382G>C	p.Gly461Ala	missense	Exon 8 of 15	NP_001372041.1	A0A994J5J9
	PHC2	NM_001385119.1		c.1316G>C	p.Gly439Ala	missense	Exon 9 of 16	NP_001372048.1	Q8IXK0-5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PHC2	ENST00000683057.1	MANE Select	c.1316G>C	p.Gly439Ala	missense	Exon 8 of 15	ENSP00000507877.1	Q8IXK0-5
	PHC2	ENST00000257118.5	TSL:1	c.1316G>C	p.Gly439Ala	missense	Exon 7 of 14	ENSP00000257118.5	Q8IXK0-1
	PHC2	ENST00000431992.6	TSL:1	c.1229G>C	p.Gly410Ala	missense	Exon 7 of 14	ENSP00000389436.2	A0A0A0MSI2

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152234 Hom.: 0 Cov.: 33

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: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000119 AC: 3 AN: 251250 AF XY: 0.00000736

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000578

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461850 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727220

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.0000447 AC: 2 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53380

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1112008

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152234 Hom.: 0 Cov.: 33 AF XY: 0.0000134 AC XY: 1 AN XY: 74372

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 41456

American (AMR) AF: 0.00 AC: 0 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5190

South Asian (SAS) AF: 0.00 AC: 0 AN: 4836

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68046

Other (OTH) AF: 0.00 AC: 0 AN: 2090

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.064
BayesDel_addAF	Benign	-0.36	T
BayesDel_noAF	Benign	-0.58
CADD	Benign	8.5
DANN	Benign	0.52
DEOGEN2	Benign	0.0055	T
Eigen	Benign	-0.43
Eigen_PC	Benign	-0.45
FATHMM_MKL	Benign	0.59	D
LIST_S2	Benign	0.72	T
M_CAP	Benign	0.011	T
MetaRNN	Benign	0.071	T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	0.81	L
PhyloP100		1.2
PrimateAI	Benign	0.36	T
PROVEAN	Benign	-0.59	N
REVEL	Benign	0.11
Sift	Benign	0.26	T
Sift4G	Benign	0.80	T
Polyphen		0.70	P
Vest4		0.15
MutPred		0.069		Loss of catalytic residue at V440 (P = 0.1539)
MVP		0.36
MPC		0.50
ClinPred		0.069	T
GERP RS		2.9
Varity_R		0.074
gMVP		0.40
Mutation Taster		=99/1	polymorphism

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: rs1207269080; hg19: chr1-33820515;