1EU8

STRUCTURE OF TREHALOSE MALTOSE BINDING PROTEIN FROM THERMOCOCCUS LITORALIS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.199 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

The crystal structure of a liganded trehalose/maltose-binding protein from the hyperthermophilic Archaeon Thermococcus litoralis at 1.85 A.

Diez, J.Diederichs, K.Greller, G.Horlacher, R.Boos, W.Welte, W.

(2001) J Mol Biol 305: 905-915

  • DOI: 10.1006/jmbi.2000.4203
  • Primary Citation of Related Structures:  
    1EU8

  • PubMed Abstract: 
  • We report the crystallization and structure determination at 1.85 A of the extracellular, membrane-anchored trehalose/maltose-binding protein (TMBP) in complex with its substrate trehalose. TMBP is the substrate recognition site of the high-affinity trehalose/maltose ABC transporter of the hyperthermophilic Archaeon Thermococcus litoralis ...

    We report the crystallization and structure determination at 1.85 A of the extracellular, membrane-anchored trehalose/maltose-binding protein (TMBP) in complex with its substrate trehalose. TMBP is the substrate recognition site of the high-affinity trehalose/maltose ABC transporter of the hyperthermophilic Archaeon Thermococcus litoralis. In vivo, this protein is anchored to the membrane, presumably via an N-terminal cysteine lipid modification. The crystallized protein was N-terminally truncated, resulting in a soluble protein exhibiting the same binding characteristics as the wild-type protein. The protein shows the characteristic features of a transport-related, substrate-binding protein and is structurally related to the maltose-binding protein (MBP) of Escherichia coli. It consists of two similar lobes, each formed by a parallel beta-sheet flanked by alpha-helices on both sides. Both are connected by a hinge region consisting of two antiparallel beta-strands and an alpha-helix. As in MBP, the substrate is bound in the cleft between the lobes by hydrogen bonds and hydrophobic interactions. However, compared to maltose binding in MBP, direct hydrogen bonding between the substrate and the protein prevails while apolar contacts are reduced. To elucidate factors contributing to thermostability, we compared TMBP with its mesophilic counterpart MBP and found differences known from similar investigations. Specifically, we find helices that are longer than their structurally equivalent counterparts, and fewer internal cavities.


    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
TREHALOSE/MALTOSE BINDING PROTEINA409Thermococcus litoralisMutation(s): 0 
Find proteins for Q7LYW7 (Thermococcus litoralis (strain ATCC 51850 / DSM 5473 / JCM 8560 / NS-C))
Explore Q7LYW7 
Go to UniProtKB:  Q7LYW7
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
alpha-D-glucopyranose-(1-1)-alpha-D-glucopyranoseB2 N/A Oligosaccharides Interaction
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 2
IDChainsNameType/Class2D Diagram3D Interactions
PRD_900006
Query on PRD_900006
BtrehaloseOligosaccharide /  Nutrient

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.198 
  • R-Value Observed: 0.199 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.243α = 90
b = 81.526β = 90
c = 86.455γ = 90
Software Package:
Software NamePurpose
SHARPphasing
CNSrefinement
MAR345data collection
XDSdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-03-14
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-04
    Changes: Refinement description
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Non-polymer description, Structure summary