UBTF

Upstream binding transcription factor, RNA polymerase I; RNA聚合酶I上游結合因子
	PDB rendering based on 1k99.
有效結構
PDB	直系同源檢索：PDBe, RCSB
PDB查詢代碼列表
	1K99, 1L8Y, 1L8Z, 2HDZ
標識
代號	UBTF; NOR-90; UBF; UBF-1; UBF1
擴展標識	遺傳學：600673 鼠基因：98512 同源基因：7970 GeneCards: UBTF Gene
基因本體論描述
分子功能	· DNA binding; · protein binding;
細胞成分	· nucleoplasm; · nucleolus; · cytoplasm;
生物過程	· blastocyst growth; · regulation of transcription from RNA polymerase I promoter; · transcription from RNA polymerase I promoter; · transcription initiation from RNA polymerase I promoter; · transcription elongation from RNA polymerase I promoter; · termination of RNA polymerase I transcription; · embryo implantation; · gene expression; · positive regulation of transcription from RNA polymerase I promoter;
	Sources: Amigo / QuickGO
RNA表達模式
	更多表達數據
直系同源體
	閱; 論; 編;

核仁轉錄因子1（Nucleolar transcription factor 1）又叫上游結合轉錄因子（Upstream binding transcription factor，縮寫UBTF）或上游結合因子1（Upstream binding factor 1，縮寫UBF1）是一種由人類基因UBTF 所編碼的蛋白質^[1]^[2]。

功能[編輯]

UBTF是18S、5.8S和28S的核糖體RNA的轉錄所必須的轉錄因子，和SL1因子（一個四聚體，包括一個TATA結合蛋白和3個轉錄輔助因子TAF1（英語：TAF1））共同起作用。在人體中存在94和97kD的兩種UBF多肽鏈。UBF是一種核仁磷酸化蛋白（nucleolar phosphoprotein），同時具有DNA結合結構域和反式激活結構域，通過HMG盒結合到人rRNA啟動子的核心與上游部位。^[2]

相互作用[編輯]

UBTF已知能與酪蛋白激酶2α亞基（英語：Casein kinase 2, alpha 1）^[3]、TAF1C^[4]^[5]、視網膜母細胞瘤蛋白^[6]和TAF1^[7]進行交互作用。

參考文獻[編輯]

^ Matera AG, Wu W, Imai H, O'Keefe CL, Chan EK. Molecular cloning of the RNA polymerase I transcription factor hUBF/NOR-90 (UBTF) gene and localization to 17q21.3 by fluorescence in situ hybridization and radiation hybrid mapping. Genomics. May 1997, 41 (1): 135–8. PMID 9126496. doi:10.1006/geno.1997.4647.
^ ^2.0 ^2.1 Entrez Gene: UBTF upstream binding transcription factor, RNA polymerase I.
^ Voit, R; Kuhn A, Sander E E, Grummt I. Activation of mammalian ribosomal gene transcription requires phosphorylation of the nucleolar transcription factor UBF. Nucleic Acids Res. (ENGLAND). July 1995, 23 (14): 2593–9. ISSN 0305-1048. PMC 307079 . PMID 7651819. doi:10.1093/nar/23.14.2593.
^ Voit, R; Grummt I. Phosphorylation of UBF at serine 388 is required for interaction with RNA polymerase I and activation of rDNA transcription. Proc. Natl. Acad. Sci. U.S.A. (United States). November 2001, 98 (24): 13631–6. ISSN 0027-8424. PMC 61092 . PMID 11698641. doi:10.1073/pnas.231071698.
^ Zhai, W; Comai L. Repression of RNA Polymerase I Transcription by the Tumor Suppressor p53. Mol. Cell. Biol. (UNITED STATES). August 2000, 20 (16): 5930–8. ISSN 0270-7306. PMC 86070 . PMID 10913176. doi:10.1128/MCB.20.16.5930-5938.2000.
^ Hannan, K M; Hannan R D, Smith S D, Jefferson L S, Lun M, Rothblum L I. Rb and p130 regulate RNA polymerase I transcription: Rb disrupts the interaction between UBF and SL-1. Oncogene (ENGLAND). October 2000, 19 (43): 4988–99. ISSN 0950-9232. PMID 11042686. doi:10.1038/sj.onc.1203875.
^ Lin, Chih-Yin; Tuan JoAnn, Scalia Pierluigi, Bui Tiffany, Comai Lucio. The cell cycle regulatory factor TAF1 stimulates ribosomal DNA transcription by binding to the activator UBF. Curr. Biol. (England). Dec 2002, 12 (24): 2142–6. ISSN 0960-9822. PMID 12498690. doi:10.1016/S0960-9822(02)01389-1.

延伸閱讀[編輯]

Chan EK, Imai H, Hamel JC, Tan EM. Human autoantibody to RNA polymerase I transcription factor hUBF. Molecular identity of nucleolus organizer region autoantigen NOR-90 and ribosomal RNA transcription upstream binding factor. J. Exp. Med. 1991, 174 (5): 1239–44. PMC 2119007 . PMID 1940801. doi:10.1084/jem.174.5.1239.
Jantzen HM, Admon A, Bell SP, Tjian R. Nucleolar transcription factor hUBF contains a DNA-binding motif with homology to HMG proteins. Nature. 1990, 344 (6269): 830–6. PMID 2330041. doi:10.1038/344830a0.
Bell SP, Learned RM, Jantzen HM, Tjian R. Functional cooperativity between transcription factors UBF1 and SL1 mediates human ribosomal RNA synthesis. Science. 1988, 241 (4870): 1192–7. PMID 3413483. doi:10.1126/science.3413483.
Voit R, Kuhn A, Sander EE, Grummt I. Activation of mammalian ribosomal gene transcription requires phosphorylation of the nucleolar transcription factor UBF. Nucleic Acids Res. 1995, 23 (14): 2593–9. PMC 307079 . PMID 7651819. doi:10.1093/nar/23.14.2593.
Hempel WM; Cavanaugh AH; Hannan RD; et al. The species-specific RNA polymerase I transcription factor SL-1 binds to upstream binding factor. Mol. Cell. Biol. 1996, 16 (2): 557–63. PMC 231034 . PMID 8552083.
Hanada K; Song CZ; Yamamoto K; et al. RNA polymerase I associated factor 53 binds to the nucleolar transcription factor UBF and functions in specific rDNA transcription. EMBO J. 1996, 15 (9): 2217–26. PMC 450146 . PMID 8641287.
Pluta AF, Earnshaw WC. Specific interaction between human kinetochore protein CENP-C and a nucleolar transcriptional regulator. J. Biol. Chem. 1996, 271 (31): 18767–74. PMID 8702533. doi:10.1074/jbc.271.31.18767.
Whitehead CM, Winkfein RJ, Fritzler MJ, Rattner JB. ASE-1: a novel protein of the fibrillar centres of the nucleolus and nucleolus organizer region of mitotic chromosomes. Chromosoma. 1998, 106 (8): 493–502. PMID 9426281. doi:10.1007/s004120050271.
Voit R, Hoffmann M, Grummt I. Phosphorylation by G1-specific cdk-cyclin complexes activates the nucleolar transcription factor UBF. EMBO J. 1999, 18 (7): 1891–9. PMC 1171274 . PMID 10202152. doi:10.1093/emboj/18.7.1891.
Liu CJ, Wang H, Lengyel P. The interferon-inducible nucleolar p204 protein binds the ribosomal RNA-specific UBF1 transcription factor and inhibits ribosomal RNA transcription. EMBO J. 1999, 18 (10): 2845–54. PMC 1171365 . PMID 10329630. doi:10.1093/emboj/18.10.2845.
Hannan KM; Hannan RD; Smith SD; et al. Rb and p130 regulate RNA polymerase I transcription: Rb disrupts the interaction between UBF and SL-1. Oncogene. 2000, 19 (43): 4988–99. PMID 11042686. doi:10.1038/sj.onc.1203875.
Kalousek I, Krízková P. Lymphocyte mitogenic transformation is accompanied by phosphorylation of the nucleolar transcription factor UBF. Cell. Mol. Biol. (Noisy-le-grand). 2001, 46 (7): 1163–71. PMID 11075946.
Pelletier G; Stefanovsky VY; Faubladier M; et al. Competitive recruitment of CBP and Rb-HDAC regulates UBF acetylation and ribosomal transcription. Mol. Cell. 2002, 6 (5): 1059–66. PMID 11106745. doi:10.1016/S1097-2765(00)00104-0.
Miller G; Panov KI; Friedrich JK; et al. hRRN3 is essential in the SL1-mediated recruitment of RNA Polymerase I to rRNA gene promoters. EMBO J. 2001, 20 (6): 1373–82. PMC 145519 . PMID 11250903. doi:10.1093/emboj/20.6.1373.
Seither P, Iben S, Thiry M, Grummt I. PAF67, a novel protein that is associated with the initiation-competent form of RNA polymerase I. Biol. Chem. 2002, 382 (8): 1163–70. PMID 11592397. doi:10.1515/BC.2001.146.
Voit R, Grummt I. Phosphorylation of UBF at serine 388 is required for interaction with RNA polymerase I and activation of rDNA transcription. Proc. Natl. Acad. Sci. U.S.A. 2002, 98 (24): 13631–6. PMC 61092 . PMID 11698641. doi:10.1073/pnas.231071698.
Stefanovsky VY; Pelletier G; Hannan R; et al. An immediate response of ribosomal transcription to growth factor stimulation in mammals is mediated by ERK phosphorylation of UBF. Mol. Cell. 2002, 8 (5): 1063–73. PMID 11741541. doi:10.1016/S1097-2765(01)00384-7.
Andersen JS; Lyon CE; Fox AH; et al. Directed proteomic analysis of the human nucleolus. Curr. Biol. 2002, 12 (1): 1–11. PMID 11790298. doi:10.1016/S0960-9822(01)00650-9.
Dühr S; Torres-Montaner A; Astola A; et al. Molecular analysis of the 5' region of human ribosomal transcription factor UBF. DNA Seq. 2002, 12 (4): 267–72. PMID 11916260. doi:10.3109/10425170109025001.

[pmid9126496-1] Matera AG, Wu W, Imai H, O'Keefe CL, Chan EK. Molecular cloning of the RNA polymerase I transcription factor hUBF/NOR-90 (UBTF) gene and localization to 17q21.3 by fluorescence in situ hybridization and radiation hybrid mapping. Genomics. May 1997, 41 (1): 135–8. PMID 9126496. doi:10.1006/geno.1997.4647.

[entrez-2] 2.0 ^2.1 Entrez Gene: UBTF upstream binding transcription factor, RNA polymerase I.

[pmid7651819-3] Voit, R; Kuhn A, Sander E E, Grummt I. Activation of mammalian ribosomal gene transcription requires phosphorylation of the nucleolar transcription factor UBF. Nucleic Acids Res. (ENGLAND). July 1995, 23 (14): 2593–9. ISSN 0305-1048. PMC 307079 . PMID 7651819. doi:10.1093/nar/23.14.2593.

[pmid11698641-4] Voit, R; Grummt I. Phosphorylation of UBF at serine 388 is required for interaction with RNA polymerase I and activation of rDNA transcription. Proc. Natl. Acad. Sci. U.S.A. (United States). November 2001, 98 (24): 13631–6. ISSN 0027-8424. PMC 61092 . PMID 11698641. doi:10.1073/pnas.231071698.

[pmid10913176-5] Zhai, W; Comai L. Repression of RNA Polymerase I Transcription by the Tumor Suppressor p53. Mol. Cell. Biol. (UNITED STATES). August 2000, 20 (16): 5930–8. ISSN 0270-7306. PMC 86070 . PMID 10913176. doi:10.1128/MCB.20.16.5930-5938.2000.

[pmid11042686-6] Hannan, K M; Hannan R D, Smith S D, Jefferson L S, Lun M, Rothblum L I. Rb and p130 regulate RNA polymerase I transcription: Rb disrupts the interaction between UBF and SL-1. Oncogene (ENGLAND). October 2000, 19 (43): 4988–99. ISSN 0950-9232. PMID 11042686. doi:10.1038/sj.onc.1203875.

[pmid12498690-7] Lin, Chih-Yin; Tuan JoAnn, Scalia Pierluigi, Bui Tiffany, Comai Lucio. The cell cycle regulatory factor TAF1 stimulates ribosomal DNA transcription by binding to the activator UBF. Curr. Biol. (England). Dec 2002, 12 (24): 2142–6. ISSN 0960-9822. PMID 12498690. doi:10.1016/S0960-9822(02)01389-1.

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