Biological Assembly 1  

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 37.97 kDa 
• Atom Count: 3,024 
• Modelled Residue Count: 344 
• Deposited Residue Count: 344 
• Unique protein chains: 1

 1HH2

Crystal structure of NusA from Thermotoga maritima

• PDB DOI: 10.2210/pdb1HH2/pdb

• Classification: TRANSCRIPTION REGULATION
• Organism(s): Thermotoga maritima
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2000-12-18 Released: 2001-10-19 
• Deposition Author(s): Worbs, M., Bourenkov, G.P., Bartunik, H.D., Huber, R., Wahl, M.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.319 
• R-Value Work: 0.244 
• R-Value Observed: 0.244 

Literature

An Extended RNA Binding Surface Through Arrayed S1 and Kh Domains in Transcription Factor Nusa

Worbs, M., Bourenkov, G.P., Bartunik, H.D., Huber, R., Wahl, M.C.

(2001) Mol Cell 7: 1177

• PubMed: 11430821 
• DOI: 10.1016/s1097-2765(01)00262-3
• Primary Citation of Related Structures:  
  1HH2


• PubMed Abstract: 
  

The crystal structure of Thermotoga maritima NusA, a transcription factor involved in pausing, termination, and antitermination processes, reveals a four-domain, rod-shaped molecule. An N-terminal alpha/beta portion, a five-stranded beta-barrel (S1 domain), and two K-homology (KH) modules create a continuous spine of positive electrostatic potential, suitable for nonspecific mRNA attraction. Homology models suggest how, in addition, specific mRNA regulatory sequences can be recognized by the S1 and KH motifs. An arrangement of multiple S1 and KH domains mediated by highly conserved residues is seen, creating an extended RNA binding surface, a paradigm for other proteins with similar domain arrays. Structural and mutational analyses indicate that the motifs cooperate, modulating strength and specificity of RNA binding.

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Organizational Affiliation: 

Max-Planck-Institut für Biochemie, Abteilung Strukturforschung, Am Klopferspitz 18a, D-82152, Martinsried, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
N UTILIZATION SUBSTANCE PROTEIN A	A [auth P]	344	Thermotoga maritima	Mutation(s): 0  Gene Names: nusA
UniProt
Find proteins for Q9X298 (Thermotoga maritima (strain ATCC 43589 / DSM 3109 / JCM 10099 / NBRC 100826 / MSB8)) Explore Q9X298  Go to UniProtKB:  Q9X298

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.10 Å
• R-Value Free: 0.319 
• R-Value Work: 0.244 
• R-Value Observed: 0.244 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 115.531	α = 90
b = 115.531	β = 90
c = 63.81	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2001-10-19 
Deposition Author(s): Worbs, M., Bourenkov, G.P., Bartunik, H.D., Huber, R., Wahl, M.C.

Revision History  

• Version 1.0: 2001-10-19
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance