PXT1

Chr 6

peroxisomal testis enriched protein 1

Also known as: STEPP

NCBI Gene: 222659ENSG00000179165UniProt: Q8NFP0

Predicted to be involved in spermatogenesis. Predicted to act upstream of or within positive regulation of apoptotic process. Predicted to be located in nucleus and peroxisome. [provided by Alliance of Genome Resources, Jul 2025]

31
ClinVar variants
8
Pathogenic / LP
0.00
pLI score
0
Active trials
Clinical Summary— PXT1
⚡
Population Constraint (gnomAD)
Low constraint (pLI 0.00) — loss-of-function variants are relatively tolerated in the population.
📋
ClinVar Variants
8 Pathogenic / Likely Pathogenic· 22 VUS of 31 total submissions

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

gnomAD
Tolerant — LoF & missense variants common in population
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.
1.94LOEUF
pLI 0.000
Z-score -1.22
OE 1.64 (0.84–1.94)
Tolerant

Highly tolerant — LoF variants common in population

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.
-0.09Z-score
OE missense 1.03 (0.84–1.27)
63 obs / 61.1 exp
Tolerant

Tolerant to missense variation

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.1.64 (0.84–1.94)
0≤0.351.4
Missense OE?Ratio of observed to expected missense variants. OE ≤ 0.6 = fewer missense variants than expected by chance.1.03 (0.84–1.27)
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.0.77
0≤1.21.6
LoF obs/exp: 7 / 4.3Missense obs/exp: 63 / 61.1Syn Z: 0.82

ClinVar Variant Classifications

31 submitted variants in ClinVar

ClinVar

Classification Summary

Pathogenic7
Likely Pathogenic1
VUS22
Likely Benign1
7
Pathogenic
1
Likely Pathogenic
22
VUS
1
Likely Benign

Curated Variants Distribution

Classified variants from ClinVar · 5 ACMG categories

ClassificationLoFMissense + InframeNon-codingSynonymousTotal
Pathogenic
0
0
7
0
7
Likely Pathogenic
0
0
1
0
1
VUS
0
20
2
0
22
Likely Benign
0
1
0
0
1
Benign
0
0
0
0
0
Total02110031

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

View in ClinVar →

Protein Context — Lollipop Plot

PXT1 · 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