PHC2

Chr 1

polyhomeotic homolog 2

Also known as: EDR2, HPH2, PH2

NCBI Gene: 1912ENSG00000134686UniProt: Q8IXK0

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]

116
ClinVar variants
9
Pathogenic / LP
0.55
pLI score
0
Active trials
Clinical Summary— PHC2
⚡
Population Constraint (gnomAD)
Moderately constrained gene (pLI 0.55) — some intolerance to loss-of-function variants.
📋
ClinVar Variants
9 Pathogenic / Likely Pathogenic· 97 VUS of 116 total submissions

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

gnomAD
Moderate LoF intolerance
LoF Constraint?LOEUF (Loss-of-function Observed/Expected Upper bound Fraction) is the upper bound of the 90% CI for LoF OE — the preferred gnomAD v4 metric. Lower = more intolerant to LoF. LOEUF < 0.35 = highly constrained.
0.39LOEUF
pLI 0.546
Z-score 4.45
OE 0.21 (0.13–0.39)
Moderately constrained

More LoF-intolerant than ~75% of genes

Missense Constraint?Missense Z-score: standard deviations fewer missense variants observed vs. expected. Z > 3.09 (p < 0.001) = gene does not tolerate missense variation. OE missense < 0.6 is also considered constrained.
2.51Z-score
OE missense 0.69 (0.64–0.76)
367 obs / 529.3 exp
Mild constraint

Moderately missense-constrained (top ~2.5%)

Observed / Expected Ratios?Shaded band = 90% confidence interval. Vertical tick = point estimate. Grey threshold line = gnomAD constraint cutoff for that variant class.
LoF OE?Ratio of observed to expected LoF variants. Upper CI bound (LOEUF) ≤ 0.35 = strong LoF constraint signal.0.21 (0.13–0.39)
0≤0.351.4
Missense OE?Ratio of observed to expected missense variants. OE ≤ 0.6 = fewer missense variants than expected by chance.0.69 (0.64–0.76)
0≤0.61.4
Synonymous OE?Control metric — synonymous variants are largely neutral and expected near OE = 1.0. Significant deviation may indicate annotation issues.0.87
0≤1.21.6
LoF obs/exp: 8 / 37.3Missense obs/exp: 367 / 529.3Syn Z: 1.48

ClinVar Variant Classifications

116 submitted variants in ClinVar

ClinVar

Classification Summary

Pathogenic7
Likely Pathogenic2
VUS97
Likely Benign6
Benign4
7
Pathogenic
2
Likely Pathogenic
97
VUS
6
Likely Benign
4
Benign

Curated Variants Distribution

Classified variants from ClinVar · 5 ACMG categories

ClassificationLoFMissense + InframeNon-codingSynonymousTotal
Pathogenic
0
0
7
0
7
Likely Pathogenic
0
0
2
0
2
VUS
1
93
3
0
97
Likely Benign
0
4
0
2
6
Benign
0
2
0
2
4
Total199124116

LoF = frameshift, stop gained/lost, canonical splice · Counts from ClinVar esearch · Updated hourly

View in ClinVar →

Protein Context — Lollipop Plot

PHC2 · protein map & ClinVar variants

Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.

OMIM — Genotype-Phenotype Relationships

1 OMIM entry

OMIM
Clinical Literature
Landmark / reviewRecent case evidence
Key Publications
Landmark & review papers · by relevance
PubMed
Top 10 resultsSearch PubMed ↗
Recent Gene-Specific Literature
Gene in title · MEDLINE · newest first
Europe PMC
Top 5 resultsSearch Europe PMC ↗

Clinical Trials

Active and recruiting trials from ClinicalTrials.gov

ClinicalTrials.gov

No active trials found for this gene.

Search ClinicalTrials.gov →

External Resources

Links to major genomics databases and tools