Structure and oligomeric state of human transcription factor TFIIE.
The general RNA polymerase II transcription factor TFIIE, which is composed of two subunits, has essential roles in both transcription initiation and promoter escape. Electron microscopy analysis of negatively stained human TFIIE showed a large proportion of alpha/beta heterodimers as well as a small proportion of tetramers. Analytical ultracentrifugation, chemical crosslinking, pulldown experiments and cryo-electron microscopy confirmed that TFIIE is a alpha/beta heterodimer in solution. Three-dimensional envelopes of the alpha/beta particles showed an elongated structure composed of three distinct modules. Finally, a model for the quaternary architecture of the complex is proposed that provides a structural framework to discuss the function of TFIIE in the context of RNA polymerase II transcription initiation.
Department of Structural Biology and Genomics, Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/ULP, rue Laurent Fries, 67404 Illkirch, France.
Anass
A
Jawhari
Muriel
M
Uhring
Sacha
S
De Carlo
Corinne
C
Crucifix
Guiseppe
G
Tocchini-Valentini
Dino
D
Moras
Patrick
P
Schultz
Arnaud
A
Poterszman
D019281:Dimerization; D006801:Humans; D008958:Models, Molecular; D020836:Protein Structure, Quaternary; D017434:Protein Structure, Tertiary; D021122:Protein Subunits / Q000737:chemistry / Q000235:genetics; D013329:Structure-Activity Relationship; D019473:Transcription Factors, TFII / Q000737:chemistry* / Q000235:genetics
D021122:Protein Subunits; D019473:Transcription Factors, TFII; C066644:transcription factor TFIIE