Rawson Robert B
Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
Genes Dev. 2008 Jun 15;22(12):1561-6. doi: 10.1101/gad.1686808.
Rhomboid intramembrane proteases occur throughout the kingdoms of life. In this issue of Genes & Development, Baxt and colleagues (pp. 1636-1646) report that the single proteolytic rhomboid (EhROM1) from Entamoeba histolytica cleaves cell surface galactose-binding or N-acetylgalactosamine-binding (Gal/Gal-NAc) lectins. EhROM1 and lectins colocalize during phagocytosis and receptor capping. EhROM1 is found at the base of the cap rather than in the cap proper, suggesting a role in receptor shedding and implying that EhROM1 is crucial for amoebal infection.
菱形膜内蛋白酶存在于整个生命王国中。在本期《基因与发育》中,巴克斯特及其同事(第1636 - 1646页)报告称,溶组织内阿米巴的单一蛋白水解菱形蛋白酶(EhROM1)可切割细胞表面的半乳糖结合或N - 乙酰半乳糖胺结合(Gal/Gal - NAc)凝集素。在吞噬作用和受体封帽过程中,EhROM1与凝集素共定位。EhROM1位于封帽的基部而非封帽本身,这表明它在受体脱落中起作用,并意味着EhROM1对阿米巴感染至关重要。