6KCR

X-ray structure of the MtlR-HPr complex from Escherichia coli


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.241 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural insight into glucose repression of the mannitol operon.

Choe, M.Min, H.Park, Y.H.Kim, Y.R.Woo, J.S.Seok, Y.J.

(2019) Sci Rep 9: 13930-13930

  • DOI: 10.1038/s41598-019-50249-2

  • PubMed Abstract: 
  • Carbon catabolite repression is a regulatory mechanism to ensure sequential utilization of carbohydrates and is usually accomplished by repression of genes for the transport and metabolism of less preferred carbon compounds by a more preferred one. A ...

    Carbon catabolite repression is a regulatory mechanism to ensure sequential utilization of carbohydrates and is usually accomplished by repression of genes for the transport and metabolism of less preferred carbon compounds by a more preferred one. Although glucose and mannitol share the general components, enzyme I and HPr, of the phosphoenolpyruvate-dependent phosphotransferase system (PTS) for their transport, glucose represses the transport and metabolism of mannitol in a manner dependent on the mannitol operon repressor MtlR in Escherichia coli. In a recent study, we identified the dephosphorylated form of HPr as a regulator determining the glucose preference over mannitol by interacting with and augmenting the repressor activity of MtlR in E. coli. Here, we determined the X-ray structure of the MtlR-HPr complex at 3.5 Å resolution to understand how phosphorylation of HPr impedes its interaction with MtlR. The phosphorylation site (His15) of HPr is located close to Glu108 and Glu140 of MtlR and phosphorylation at His15 causes electrostatic repulsion between the two proteins. Based on this structural insight and comparative sequence analyses, we suggest that the determination of the glucose preference over mannitol solely by the MtlR-HPr interaction is conserved within  the Enterobacteriaceae family.


    Organizational Affiliation

    Department of Life Sciences, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea. jaesungwoo@korea.ac.kr.,School of Biological Sciences and Institute of Microbiology, Seoul National University, Seoul, 00826, Korea.,School of Biological Sciences and Institute of Microbiology, Seoul National University, Seoul, 00826, Korea. yjseok@snu.ac.kr.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mannitol operon repressor
A, C
201Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: mtlR
Find proteins for P0AF10 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AF10
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Phosphocarrier protein HPr
B, D
85Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: ptsH (hpr)
Find proteins for P0AA04 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AA04
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.241 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 97.360α = 90.00
b = 122.317β = 90.00
c = 147.533γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHENIXrefinement
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Research Foundation (Korea)Korea, Republic OfNRF-2018R1A5A1025077
National Research Foundation (Korea)Korea, Republic Of2019R1A2C2004143

Revision History 

  • Version 1.0: 2019-10-09
    Type: Initial release