1BJA

ACTIVATION DOMAIN OF THE PHAGE T4 TRANSCRIPTION FACTOR MOTA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The activation domain of the MotA transcription factor from bacteriophage T4.

Finnin, M.S.Cicero, M.P.Davies, C.Porter, S.J.White, S.W.Kreuzer, K.N.

(1997) EMBO J 16: 1992-2003

  • DOI: 10.1093/emboj/16.8.1992
  • Primary Citation of Related Structures:  
    1BJA

  • PubMed Abstract: 
  • Bacteriophage T4 encodes a transcription factor, MotA, that binds to the -30 region of middle-mode promoters and activates transcription by host RNA polymerase. We have solved the structure of the MotA activation domain to 2.2 A by X-ray crystallogra ...

    Bacteriophage T4 encodes a transcription factor, MotA, that binds to the -30 region of middle-mode promoters and activates transcription by host RNA polymerase. We have solved the structure of the MotA activation domain to 2.2 A by X-ray crystallography, and have also determined its secondary structure by NMR. An area on the surface of the protein has a distinctive patch that is populated with acidic and hydrophobic residues. Mutations within this patch cause a defective T4 growth phenotype, arguing that the patch is important for MotA function. One of the mutant MotA activation domains was purified and analyzed by NMR, and the spectra clearly show that the domain is properly folded. The mutant full-length protein appears to bind DNA normally but is deficient in transcriptional activation. We conclude that the acidic/hydrophobic surface patch is specifically involved in transcriptional activation, which is reminiscent of eukaryotic acidic activation domains.


    Organizational Affiliation

    Department of Microbiology, Duke University Medical Center, Durham, NC 27710, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TRANSCRIPTION REGULATORY PROTEIN MOTAAB95Escherichia virus T4Mutation(s): 0 
Gene Names: motA
Find proteins for P22915 (Enterobacteria phage T4)
Explore P22915 
Go to UniProtKB:  P22915
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.19 Å
  • R-Value Free: 0.291 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.7α = 90
b = 46.7β = 90
c = 139.6γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-11-04
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance