{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\nTRAPPC2B, also recognized as MIP‑2A, acts as a transcriptional cofactor that modulates gene expression by interacting with established transcriptional regulators. Originally identified through its association with MBP‑1—a transcriptional repressor—TRAPPC2B appears to relieve MBP‑1–mediated repression, suggesting it plays a role in fine‐tuning transcriptional outputs. Its expression is highly tissue‑specific, being most abundant in the right cerebellum, pituitary, adrenal gland, and testis while remaining nearly undetectable in skeletal muscle. In the pituitary gland, TRAPPC2B exerts a negative regulatory effect on the luteinizing hormone beta (LHβ) gene by physically interacting with the transcription factors SF‑1 and Ptx1, thereby inhibiting their synergistic activation of the LHβ promoter. These findings indicate that TRAPPC2B is involved in modulating hormone gene transcription and contributes to tissue‑specific transcriptional regulation."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": ""}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Asish K Ghosh, Robert Steele, Ratna B Ray "}, {"type": "b", "children": [{"type": "t", "text": "Modulation of human luteinizing hormone beta gene transcription by MIP-2A."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "J Biol Chem (2003)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1074/jbc.M211982200"}], "href": "https://doi.org/10.1074/jbc.M211982200"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "12700240"}], "href": "https://pubmed.ncbi.nlm.nih.gov/12700240"}]}]}]}