# LC3-associated phagocytosis: a sorting mechanism for ubiquitinated membrane proteins?

**Authors:** Femmy C. Stempels, Geert van den Bogaart

PMC · DOI: 10.1080/27694127.2022.2040765 · Autophagy Reports · 2022-03-22

## TL;DR

This paper suggests that LC3-associated phagocytosis may help sort proteins for degradation by grouping them in specific areas of cell membranes.

## Contribution

The paper proposes a novel mechanistic role for LC3-associated phagocytosis as a sorting mechanism for membrane proteins.

## Key findings

- LAP may cluster proteins for degradation in discrete phagosomal membrane domains.
- The study suggests LAP integrates phagocytosis and autophagy mechanisms.
- Findings hint at LAP's role in immune signaling and antigen presentation.

## Abstract

The process of LC3-associated phagocytosis (LAP) combines elements of phagocytosis and autophagy. LAP is involved in clearance of pathogens and cell debris, antigen presentation, and immune signaling. However, the mechanistic role of LAP is incompletely understood. Based on observations from our recent study, we propose that LAP might serve as a sorting mechanism to cluster proteins destined for degradation into discrete domains of the phagosomal membrane.

## Linked entities

- **Proteins:** MAP1LC3A (microtubule associated protein 1 light chain 3 alpha)

## Full-text entities

- **Genes:** PIK3R1 (phosphoinositide-3-kinase regulatory subunit 1) [NCBI Gene 5295] {aka AGM7, GRB1, IMD36, p85, p85-ALPHA, p85alpha}, SQSTM1 (sequestosome 1) [NCBI Gene 8878] {aka A170, DMRV, EBIAP, FTDALS3, NADGP, OSIL}, MAP1LC3B (microtubule associated protein 1 light chain 3 beta) [NCBI Gene 81631] {aka ATG8F, LC3B, MAP1A/1BLC3, MAP1LC3B-a}, STX17 (syntaxin 17) [NCBI Gene 55014], RUBCN (rubicon autophagy regulator) [NCBI Gene 9711] {aka KIAA0226, RUBICON, SCAR15}, MAP1LC3A (microtubule associated protein 1 light chain 3 alpha) [NCBI Gene 84557] {aka ATG8E, LC3, LC3A, MAP1ALC3, MAP1BLC3}, PIK3C3 (phosphatidylinositol 3-kinase catalytic subunit type 3) [NCBI Gene 5289] {aka VPS34, Vps34, hVps34}, CYBB (cytochrome b-245 beta chain) [NCBI Gene 1536] {aka AMCBX2, CGD, CGDX, GP91-1, GP91-PHOX, GP91PHOX}, GABARAPL1 (GABA type A receptor associated protein like 1) [NCBI Gene 23710] {aka APG8-LIKE, APG8L, ATG8, ATG8B, ATG8L, GEC1}, LAP (Laryngeal adductor paralysis) [NCBI Gene 7939]
- **Diseases:** autoimmune diseases (MESH:D001327), inflammatory (MESH:D007249)
- **Chemicals:** MG132 (MESH:C072553), EACC (-), cycloheximide (MESH:D003513), PE (MESH:C483858), bafilomycin A1 (MESH:C040929), SAR405 (MESH:C000594652), chloroquine (MESH:D002738)
- **Species:** Homo sapiens (human, species) [taxon 9606]
- **Cell lines:** HeLa — Homo sapiens (Human), Human papillomavirus-related endocervical adenocarcinoma, Cancer cell line (CVCL_0030)

## Full text

_Full body text omitted from this summary view._ Fetch the complete paper as Markdown: https://tomesphere.com/paper/PMC11864675/full.md

## Figures

2 figures with captions in the complete paper: https://tomesphere.com/paper/PMC11864675/full.md

## References

1 references — full list in the complete paper: https://tomesphere.com/paper/PMC11864675/full.md

---
Source: https://tomesphere.com/paper/PMC11864675