{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nAlthough the query requested information on MIR4320, none of the provided abstracts mention or characterize any gene or microRNA by that name. Instead, these studies focus on the transcriptional regulation and functional properties of closely situated mouse RING finger protein genes (Rnf33 and Rnf35) during early embryogenesis. Two independent investigations revealed that Rnf33 and Rnf35 are expressed predominantly at the two‐cell stage with complex transcriptional initiation events—including alternative splicing, differential 3′ cleavage, and polyadenylation—as well as utilization of multiple and stage‐specific promoters, highlighting a permissive and opportunistic mode of gene expression in the preimplantation embryo."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nAnother study characterized RNF33 (also referred to as Trim60) from a different perspective. Here, RNF33 was identified as a tripartite motif (TRIM) protein that, in addition to its transient embryonic expression, is present in adult testis. Through protein–protein interaction assays—including yeast two-hybrid screening and co-immunoprecipitation—RNF33 was shown to interact with the kinesin-2 motor subunits KIF3A and KIF3B, implicating it in kinesin-dependent transport along microtubules."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nA further investigation into TRIM60, a close relative within the TRIM protein family, uncovered its role in modulating the innate immune response. In macrophages, TRIM60 dampens the activation of the TAK1 signalosome by promoting the SUMOylation of TAB2 at specific lysine residues. This modification hinders the assembly of the TRAF6/TAB2/TAK1 complex, resulting in reduced downstream activation of MAPK and NF‐κB signaling pathways and ultimately leading to a tempered production of proinflammatory cytokines. In vivo, TRIM60 deficiency correlates with heightened sensitivity to endotoxin-induced septic shock and bacterial infection."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": "\n"}]}, {"type": "t", "text": "\n\n"}, {"type": "p", "children": [{"type": "t", "text": "\nIn summary, while these abstracts provide detailed insights into the roles of Rnf33/Rnf35 in early embryonic gene expression and of RNF33/TRIM60 in intracellular transport and innate immune regulation, they do not address any function for MIR4320. Consequently, the biological role of MIR4320 remains unexplored within the context of these studies.\n"}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Huang-Hui Chen, Tiffany Yi-Chen Liu, Hung Li, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Use of a common promoter by two juxtaposed and intronless mouse early embryonic genes, Rnf33 and Rnf35: implications in zygotic gene expression."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Genomics (2002)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1006/geno.2002.6808"}], "href": "https://doi.org/10.1006/geno.2002.6808"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "12160726"}], "href": "https://pubmed.ncbi.nlm.nih.gov/12160726"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Kong-Bung Choo, Huang-Hui Chen, Tiffany Yi-Chen Liu, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Different modes of regulation of transcription and pre-mRNA processing of the structurally juxtaposed homologs, Rnf33 and Rnf35, in eggs and in pre-implantation embryos."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Nucleic Acids Res (2002)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1093/nar/gkf623"}], "href": "https://doi.org/10.1093/nar/gkf623"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "12433986"}], "href": "https://pubmed.ncbi.nlm.nih.gov/12433986"}]}, {"type": "r", "ref": 3, "children": [{"type": "t", "text": "Chiu-Jung Huang, Chih-Cheng Huang, Chih-Chun Chang "}, {"type": "b", "children": [{"type": "t", "text": "Association of the testis-specific TRIM/RBCC protein RNF33/TRIM60 with the cytoplasmic motor proteins KIF3A and KIF3B."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Mol Cell Biochem (2012)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1007/s11010-011-1050-8"}], "href": "https://doi.org/10.1007/s11010-011-1050-8"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "21909995"}], "href": "https://pubmed.ncbi.nlm.nih.gov/21909995"}]}, {"type": "r", "ref": 4, "children": [{"type": "t", "text": "Zhiwen Gu, Xueying Chen, Wenyong Yang, et al. "}, {"type": "b", "children": [{"type": "t", "text": "The SUMOylation of TAB2 mediated by TRIM60 inhibits MAPK/NF-κB activation and the innate immune response."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Cell Mol Immunol (2021)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1038/s41423-020-00564-w"}], "href": "https://doi.org/10.1038/s41423-020-00564-w"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "33184450"}], "href": "https://pubmed.ncbi.nlm.nih.gov/33184450"}]}]}]}