SYTL2
Chr 11synaptotagmin like 2
Also known as: CHR11SYT, EXO4, PPP1R151, SGA72M, SLP2, SLP2A
SYTL2 encodes synaptotagmin-like protein 2, which acts as a RAB27A effector protein controlling vesicle trafficking, cytotoxic granule exocytosis in lymphocytes, and glucagon-containing granule recruitment in pancreatic alpha cells. Mutations cause autosomal recessive familial hemophagocytic lymphohistiocytosis type 5, a severe immunodeficiency disorder affecting the hematopoietic and immune systems. The gene shows high tolerance to loss-of-function variants (LOEUF 1.01), suggesting that pathogenic variants may involve specific functional disruptions rather than complete protein loss.
Population Genetics & Constraint
gnomAD v4 — loss-of-function & missense intolerance
Highly tolerant — LoF variants common in population
Tolerant to missense variation
This gene has evidence for multiple mechanisms of pathogenicity (dominant-negative and gain-of-function). Both the Badonyi & Marsh prediction and the broader genomic evidence point to dominant-negative as the predominant mechanism. Different variants in this gene may act through different mechanisms — interpret in context of the specific variant.
Note: In-silico variant effect predictors (SIFT, PolyPhen, REVEL, CADD) may underestimate pathogenicity of missense variants in genes with GOF or DN mechanisms. Consider functional evidence and clinical context.
Predictions from Badonyi M, Marsh JA. PLoS ONE. 2024;19(8):e0307312.
ClinVar Variant Classifications
343 submitted variants in ClinVar
Classification Summary
Curated Variants Distribution
Classified variants from ClinVar · 5 ACMG categories
| Classification | LoF | Missense + Inframe | Non-coding | Synonymous | Total |
|---|---|---|---|---|---|
Pathogenic | 0 | 0 | 20 | 0 | 20 |
Likely Pathogenic | 0 | 0 | 1 | 0 | 1 |
VUS | 1 | 254 | 12 | 0 | 267 |
Likely Benign | 0 | 21 | 2 | 4 | 27 |
Benign | 0 | 3 | 0 | 1 | 4 |
| Total | 1 | 278 | 35 | 5 | 319 |
LoF = frameshift, stop gained/lost, canonical splice · Counts from ClinVar esearch · Updated hourly
View in ClinVar →Protein Context — Lollipop Plot
SYTL2 · protein map & ClinVar variants
Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.
3D Protein StructureAlphaFold
External Resources
Links to major genomics databases and tools
Clinical Trials
Active and recruiting trials from ClinicalTrials.gov
No active trials found for this gene.
Search ClinicalTrials.gov →External Resources
Links to major genomics databases and tools