LSAMP

Chr 3

limbic system associated membrane protein

Also known as: IGLON3, LAMP

This gene encodes a member of the immunoglobulin LAMP, OBCAM and neurotrimin (IgLON) family of proteins. The encoded preproprotein is proteolytically processed to generate a neuronal surface glycoprotein. This protein may act as a selective homophilic adhesion molecule during axon guidance and neuronal growth in the developing limbic system. The encoded protein may also function as a tumor suppressor and may play a role in neuropsychiatric disorders. Alternative splicing results in multiple transcript variants, at least one of which encodes a preproprotein that is proteolytically processed. [provided by RefSeq, Jan 2016]

OMIMResearchGenerating clinical summary…
LOFmechanismLOEUF 0.27
Clinical SummaryLSAMP
Population Constraint (gnomAD)
Highly constrained gene — heterozygous loss-of-function variants are very rare in the population (pLI 0.99). One damaged copy is likely sufficient to cause disease.

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

LoF intolerant — likely haploinsufficient
LoF Constraint?
0.27LOEUF
pLI 0.987
Z-score 3.67
OE 0.06 (0.020.27)
Highly constrained

Highly LoF-intolerant (top ~10% of genes)

Missense Constraint?
1.57Z-score
OE missense 0.68 (0.590.79)
132 obs / 193.4 exp
Tolerant

Mild missense constraint

Observed / Expected Ratios?
LoF OE?0.06 (0.020.27)
00.351.4
Missense OE?0.68 (0.590.79)
00.61.4
Synonymous OE?0.94
01.21.6
LoF obs/exp: 1 / 17.6Missense obs/exp: 132 / 193.4Syn Z: 0.39

This gene — mechanism propensity

DN
0.4190th %ile
GOF
0.5367th %ile
LOF
0.68top 10%

The highest-scoring mechanism for this gene is loss-of-function (haploinsufficiency).

LOFprediction above median · LOEUF 0.27

Predictions from Badonyi M, Marsh JA. PLoS ONE. 2024;19(8):e0307312. Mechanism ranking also informed by gnomAD constraint, ClinVar, and ClinGen data.

ClinVar Variant Classifications

0 submitted variants in ClinVar

Protein Context — Lollipop Plot

LSAMP · protein map & ClinVar variants

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

Clinical Trials

Active and recruiting trials from ClinicalTrials.gov

No active trials found for this gene.

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