Transcription factor tau

Function

Transcription factor tau or TFIIIC is required for transcription of tRNA and 5S RNA genes by RNA polymerase III^[1]. TFIIIC conserved complex is involved in the mechanism controlling general genome organization^[2]. TFIIIC is a multisubunit protein which initiates transcription complex assembly on tRNA by binding to the internal box B promoter element of RNA polymerase III^[3].

Structural highlights

TFIIIC contains 6 subunits which are organized in 2 subcomplexes. Subcomplex A contains the 131 kDa, 95 kDa and 55kDa subunits while subcomplex B contains 138 kDa, 91 kDa and 60 kDa subunits^[4]. The structure of TFIIIC subunit SCF1 DNA-binding domain contains a (colored in green) and displays a (colored in royalblue)^[5].

Se-Met structure of TFIIIC subunit SCF1 DNA-binding domain (PDB code 4bji)

Drag the structure with the mouse to rotate

3D structures of transcription factor tau or TFIIIC3D structures of transcription factor tau or TFIIIC

Updated on 28-December-2023

Domains: dimerization 1-110; histidine phosphatase 1-272; DNA-binding 186-396; N-terminal TPR array 123-566; central EWH 546-641

4bjj - fyTFIIIC subunits SFC1 + SFC7 dimerization domain - fission yeast
4bji - fyTFIIIC subunit SFC1 DNA-binding domain
2yn0 - yTFIIIC 55 kDa subunit SFC7 histidine phosphatase domain - yeast
5aem, 5aio - yTFIIIC 131 kDa subunit SFC4 N-terminal TPR array
5aim - yTFIIIC 138 kDa subunit SFC3 central EWH domain
6yj6 - yTFIIIC 131 kDa + 95 kDa + 55 kDa subunits – Cryo EM
8ffz - yTFIIIC 138 kDa + 131 kDa + 95 kDa + 60 kDa + 55kDa subunits + TFIIIA + TFIIIB 70 kDa + DNA – Cryo EM

ReferencesReferences

↑ Dumay-Odelot H, Marck C, Durrieu-Gaillard S, Lefebvre O, Jourdain S, Prochazkova M, Pflieger A, Teichmann M. Identification, molecular cloning, and characterization of the sixth subunit of human transcription factor TFIIIC. J Biol Chem. 2007 Jun 8;282(23):17179-89. doi: 10.1074/jbc.M611542200. Epub 2007 , Apr 4. PMID:17409385 doi:http://dx.doi.org/10.1074/jbc.M611542200
↑ Noma K, Cam HP, Maraia RJ, Grewal SI. A role for TFIIIC transcription factor complex in genome organization. Cell. 2006 Jun 2;125(5):859-72. PMID:16751097 doi:10.1016/j.cell.2006.04.028
↑ L'Etoile ND, Fahnestock ML, Shen Y, Aebersold R, Berk AJ. Human transcription factor IIIC box B binding subunit. Proc Natl Acad Sci U S A. 1994 Mar 1;91(5):1652-6. PMID:8127861
↑ Vorlander MK, Jungblut A, Karius K, Baudin F, Grotsch H, Kosinski J, Muller CW. Structure of the TFIIIC subcomplex tauA provides insights into RNA polymerase III pre-initiation complex formation. Nat Commun. 2020 Sep 30;11(1):4905. doi: 10.1038/s41467-020-18707-y. PMID:32999288 doi:http://dx.doi.org/10.1038/s41467-020-18707-y
↑ Taylor NM, Baudin F, von Scheven G, Muller CW. RNA polymerase III-specific general transcription factor IIIC contains a heterodimer resembling TFIIF Rap30/Rap74. Nucleic Acids Res. 2013 Aug 5. PMID:23921640 doi:10.1093/nar/gkt664

Proteopedia Page Contributors and Editors (what is this?)Proteopedia Page Contributors and Editors (what is this?)

Michal Harel, Alexander Berchansky

[1] Dumay-Odelot H, Marck C, Durrieu-Gaillard S, Lefebvre O, Jourdain S, Prochazkova M, Pflieger A, Teichmann M. Identification, molecular cloning, and characterization of the sixth subunit of human transcription factor TFIIIC. J Biol Chem. 2007 Jun 8;282(23):17179-89. doi: 10.1074/jbc.M611542200. Epub 2007 , Apr 4. PMID:17409385 doi:http://dx.doi.org/10.1074/jbc.M611542200

[2] Noma K, Cam HP, Maraia RJ, Grewal SI. A role for TFIIIC transcription factor complex in genome organization. Cell. 2006 Jun 2;125(5):859-72. PMID:16751097 doi:10.1016/j.cell.2006.04.028

[3] L'Etoile ND, Fahnestock ML, Shen Y, Aebersold R, Berk AJ. Human transcription factor IIIC box B binding subunit. Proc Natl Acad Sci U S A. 1994 Mar 1;91(5):1652-6. PMID:8127861

[4] Vorlander MK, Jungblut A, Karius K, Baudin F, Grotsch H, Kosinski J, Muller CW. Structure of the TFIIIC subcomplex tauA provides insights into RNA polymerase III pre-initiation complex formation. Nat Commun. 2020 Sep 30;11(1):4905. doi: 10.1038/s41467-020-18707-y. PMID:32999288 doi:http://dx.doi.org/10.1038/s41467-020-18707-y

[5] Taylor NM, Baudin F, von Scheven G, Muller CW. RNA polymerase III-specific general transcription factor IIIC contains a heterodimer resembling TFIIF Rap30/Rap74. Nucleic Acids Res. 2013 Aug 5. PMID:23921640 doi:10.1093/nar/gkt664

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