| First Author | Lawrence DW | Year | 2012 |
| Journal | Cell Immunol | Volume | 279 |
| Issue | 1 | Pages | 46-52 |
| PubMed ID | 23085241 | Mgi Jnum | J:192192 |
| Mgi Id | MGI:5464156 | Doi | 10.1016/j.cellimm.2012.09.004 |
| Citation | Lawrence DW, et al. (2012) E3 ubiquitin ligase NKLAM is a macrophage phagosome protein and plays a role in bacterial killing. Cell Immunol 279(1):46-52 |
| abstractText | Macrophages are a critically important component of the innate and adaptive immune systems. They are equipped with oxidative and non-oxidative mechanisms to kill ingested pathogens. Natural Killer Lytic-Associated Molecule (NKLAM) is an E3 ubiquitin ligase expressed in macrophages and natural killer cells. We show that NKLAM expression in macrophages was enhanced by Toll-like receptor agonists and pro-inflammatory cytokines. Using confocal microscopy, we found that NKLAM colocalized with ingested Escherichia coli. In assays using IgG-opsonized latex beads as targets, we demonstrated that NKLAM translocated to the phagosome early during maturation at a time that coincided with elevated levels of ubiquitinated phagosome proteins. In killing assays with bone marrow-derived macrophages from wild type and NKLAM-deficient mice, we found that NKLAM-deficient macrophages demonstrated less killing of E. coli than wild type macrophages. Collectively, our data show that NKLAM is a novel component of macrophage phagosomes and is involved in macrophage bactericidal functions. |
