TMEM121B

Chr 22

transmembrane protein 121B

Also known as: CECR6

NCBI Gene: 27439ENSG00000183307UniProt: Q9BXQ6
188
ClinVar variants
65
Pathogenic / LP
0.70
pLI score
0
Active trials
Clinical Summary— TMEM121B
⚡
Population Constraint (gnomAD)
Moderately constrained gene (pLI 0.70) — some intolerance to loss-of-function variants.
📋
ClinVar Variants
65 Pathogenic / Likely Pathogenic· 118 VUS of 188 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.
0.57LOEUF
pLI 0.699
Z-score 2.34
OE 0.12 (0.04–0.57)
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.
1.50Z-score
OE missense 0.73 (0.65–0.83)
185 obs / 252.0 exp
Tolerant

Mild missense constraint

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.0.12 (0.04–0.57)
0≤0.351.4
Missense OE?Ratio of observed to expected missense variants. OE ≤ 0.6 = fewer missense variants than expected by chance.0.73 (0.65–0.83)
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.0.90
0≤1.21.6
LoF obs/exp: 1 / 8.2Missense obs/exp: 185 / 252.0Syn Z: 0.90

ClinVar Variant Classifications

188 submitted variants in ClinVar

ClinVar

Classification Summary

Pathogenic64
Likely Pathogenic1
VUS118
Likely Benign2
64
Pathogenic
1
Likely Pathogenic
118
VUS
2
Likely Benign

Curated Variants Distribution

Classified variants from ClinVar · 5 ACMG categories

ClassificationLoFMissense + InframeNon-codingSynonymousTotal
Pathogenic
0
0
64
0
64
Likely Pathogenic
0
0
1
0
1
VUS
0
99
19
0
118
Likely Benign
0
1
1
0
2
Benign
0
0
0
0
0
Total0100850185

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

View in ClinVar →

Protein Context — Lollipop Plot

TMEM121B · protein map & ClinVar variants

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

OMIM — Genotype-Phenotype

OMIM

No OMIM entries found.

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

No open access results found

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