{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nThe provided abstracts focus on the role of type II transmembrane serine proteases (TTSPs) in viral infection processes. One study demonstrates that proteases such as TMPRSS11A are capable of cleaving and activating viral glycoproteins—including influenza virus hemagglutinin (HA) and the Middle East respiratory syndrome coronavirus spike protein (MERS‑S)—which is essential for viral entry and spread."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nA second study characterizes the expression and redundancy of proteases within the HAT/DESC subfamily, showing that these enzymes, including TMPRSS11A, are not critical for normal development or survival in mice under baseline conditions."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}]}, {"type": "t", "text": " This work emphasizes the coordinated expression of these proteases but does not attribute any direct regulatory functions to other molecular entities.\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nNotably, neither abstract provides any information regarding NEGR1‑IT1. Although NEGR1‑IT1 may be of interest as a potential regulatory noncoding RNA in other contexts, these studies do not report any role or function of NEGR1‑IT1 in relation to the activation of viral glycoproteins or the regulatory mechanisms of TTSP proteases. Further research would be required to clarify any connection between NEGR1‑IT1 and these viral or protease-related processes."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "2"}, {"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Pawel Zmora, Markus Hoffmann, Heike Kollmus, et al. "}, {"type": "b", "children": [{"type": "t", "text": "TMPRSS11A activates the influenza A virus hemagglutinin and the MERS coronavirus spike protein and is insensitive against blockade by HAI-1."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Biol Chem (2018)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1074/jbc.RA118.001273"}], "href": "https://doi.org/10.1074/jbc.RA118.001273"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "29976755"}], "href": "https://pubmed.ncbi.nlm.nih.gov/29976755"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Katiuchia Uzzun Sales, John P Hobson, Rebecca Wagenaar-Miller, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Expression and genetic loss of function analysis of the HAT/DESC cluster proteases TMPRSS11A and HAT."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "PLoS One (2011)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1371/journal.pone.0023261"}], "href": "https://doi.org/10.1371/journal.pone.0023261"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "21853097"}], "href": "https://pubmed.ncbi.nlm.nih.gov/21853097"}]}]}]}