2NXP image
Deposition Date 2006-11-17
Release Date 2007-01-09
Last Version Date 2024-11-20
Entry Detail
PDB ID:
2NXP
Keywords:
Title:
Structure of NTD2 domain of the human TAF5 subunit of TFIID
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.17 Å
R-Value Free:
0.26
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Transcription initiation factor TFIID subunit 5
Gene (Uniprot):TAF5
Chain IDs:A, B, C, D, E, F, G, H
Chain Length:156
Number of Molecules:8
Biological Source:Homo sapiens
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
MSE A MET SELENOMETHIONINE
Ligand Molecules
Primary Citation
Structural analysis and dimerization potential of the human TAF5 subunit of TFIID.
Proc.Natl.Acad.Sci.Usa 104 1189 1194 (2007)
PMID: 17227857 DOI: 10.1073/pnas.0610297104

Abstact

TFIID is an essential factor required for RNA polymerase II transcription but remains poorly understood because of its intrinsic complexity. Human TAF5, a 100-kDa subunit of general transcription factor TFIID, is an essential gene and plays a critical role in assembling the 1.2 MDa TFIID complex. We report here a structural analysis of the TAF5 protein. Our structure at 2.2-A resolution of the TAF5-NTD2 domain reveals an alpha-helical domain with distant structural similarity to RNA polymerase II CTD interacting factors. The TAF5-NTD2 domain contains several conserved clefts likely to be critical for TFIID complex assembly. Our biochemical analysis of the human TAF5 protein demonstrates the ability of the N-terminal half of the TAF5 gene to form a flexible, extended dimer, a key property required for the assembly of the TFIID complex.

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Primary Citation of related structures