2F5T

Crystal Structure of the sugar binding domain of the archaeal transcriptional regulator TrmB


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.162 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Crystal Structure of the Sugar Binding Domain of the Archaeal Transcriptional Regulator TrmB

Krug, M.Lee, S.J.Diederichs, K.Boos, W.Welte, W.

(2006) J Biol Chem 281: 10976-10982

  • DOI: 10.1074/jbc.M512809200
  • Primary Citation of Related Structures:  
    2F5T

  • PubMed Abstract: 
  • TrmB is an alpha-glucoside-sensing transcriptional regulator controlling two operons encoding maltose/trehalose and maltodextrin ABC transporters of Pyrococcus furiosus. The crystal structure of an N-terminal truncated derivative of TrmB (amino acids 2-109 deleted; TrmB(delta2-109)) was solved at 1 ...

    TrmB is an alpha-glucoside-sensing transcriptional regulator controlling two operons encoding maltose/trehalose and maltodextrin ABC transporters of Pyrococcus furiosus. The crystal structure of an N-terminal truncated derivative of TrmB (amino acids 2-109 deleted; TrmB(delta2-109)) was solved at 1.5 A resolution. This protein has lost its DNA binding domain but has retained its sugar recognition site. The structure represents a novel sugar-binding fold. TrmB(delta2-109) bound maltose, glucose, sucrose, and maltotriose, exhibiting Kd values of 6.8, 25, 34, and 160 microM, respectively. TrmB(delta2-109) behaved as a monomer in dilute buffer solution in contrast to the full-length protein, which is a dimer. Co-crystallization with bound maltose identified a binding site involving seven amino acid residues: Ser229, Asn305, Gly320, Met321, Val324, Ile325, and Glu326. Six of these residues interact with the nonreducing glucosyl residue of maltose. The nonreducing glucosyl residue is shared by all substrates bound to TrmB, suggesting it as a common recognition motif.


    Organizational Affiliation

    Department of Biology, University of Konstanz, 78457 Konstanz, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
archaeal transcriptional regulator TrmBA [auth X]233Thermococcus litoralisMutation(s): 0 
Find proteins for Q7LYW4 (Thermococcus litoralis (strain ATCC 51850 / DSM 5473 / JCM 8560 / NS-C))
Explore Q7LYW4 
Go to UniProtKB:  Q7LYW4
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranoseB [auth A]2 N/A Oligosaccharides Interaction
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IMD
Query on IMD

Download Ideal Coordinates CCD File 
C [auth X]IMIDAZOLE
C3 H5 N2
RAXXELZNTBOGNW-UHFFFAOYSA-O
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
MALKd :  6800   nM  PDBBind
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 2
IDChainsNameType/Class2D Diagram3D Interactions
PRD_900001
Query on PRD_900001
B [auth A]alpha-maltoseOligosaccharide /  Nutrient

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.45 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.162 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.857α = 90
b = 56.857β = 90
c = 132.482γ = 120
Software Package:
Software NamePurpose
XSCALEdata scaling
SOLVEphasing
RESOLVEphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-02-21
    Type: Initial release
  • Version 1.1: 2008-04-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Structure summary