1EU8

STRUCTURE OF TREHALOSE MALTOSE BINDING PROTEIN FROM THERMOCOCCUS LITORALIS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.198 

wwPDB Validation 3D Report Full Report


This is version 1.3 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

  • 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 ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TREHALOSE/MALTOSE BINDING PROTEIN
A
409Thermococcus litoralis (strain ATCC 51850 / DSM 5473 / JCM 8560 / NS-C)Mutation(s): 0 
Gene Names: malE
Find proteins for Q7LYW7 (Thermococcus litoralis (strain ATCC 51850 / DSM 5473 / JCM 8560 / NS-C))
Go to UniProtKB:  Q7LYW7
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
TRE
Query on TRE

Download SDF File 
Download CCD File 
A
TREHALOSE
ALPHA-D-GLUCOPYRANOSYL-ALPHA-D-GLUCOPYRANOSIDE
C12 H22 O11
HDTRYLNUVZCQOY-LIZSDCNHSA-N
 Ligand Interaction
PT
Query on PT

Download SDF File 
Download CCD File 
A
PLATINUM (II) ION
Pt
HRGDZIGMBDGFTC-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.198 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 59.243α = 90.00
b = 81.526β = 90.00
c = 86.455γ = 90.00
Software Package:
Software NamePurpose
MAR345data collection
SHARPphasing
CNSrefinement
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-03-14
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-04
    Type: Refinement description