3IJT

Structural Characterization of SMU.440, a Hypothetical Protein from Streptococcus mutans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.377 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Bioinformatics and structural characterization of a hypothetical protein from Streptococcus mutans: implication of antibiotic resistance

Nan, J.Brostromer, E.Liu, X.-Y.Kristensen, O.Su, X.-D.

(2009) Plos One 4: e7245-e7245

  • DOI: 10.1371/journal.pone.0007245

  • PubMed Abstract: 
  • As an oral bacterial pathogen, Streptococcus mutans has been known as the aetiologic agent of human dental caries. Among a total of 1960 identified proteins within the genome of this organism, there are about 500 without any known functions. One of t ...

    As an oral bacterial pathogen, Streptococcus mutans has been known as the aetiologic agent of human dental caries. Among a total of 1960 identified proteins within the genome of this organism, there are about 500 without any known functions. One of these proteins, SMU.440, has very few homologs in the current protein databases and it does not fall into any protein functional families. Phylogenetic studies showed that SMU.440 is related to a particular ecological niche and conserved specifically in some oral pathogens, due to lateral gene transfer. The co-occurrence of a MarR protein within the same operon among these oral pathogens suggests that SMU.440 may be associated with antibiotic resistance. The structure determination of SMU.440 revealed that it shares the same fold and a similar pocket as polyketide cyclases, which indicated that it is very likely to bind some polyketide-like molecules. From the interlinking structural and bioinformatics studies, we have concluded that SMU.440 could be involved in polyketide-like antibiotic resistance, providing a better understanding of this hypothetical protein. Besides, the combination of multiple methods in this study can be used as a general approach for functional studies of a protein with unknown function.


    Organizational Affiliation

    National Laboratory of Protein Engineering and Plant Genetic Engineering, College of Life Sciences, Peking University, Beijing, People's Republic of China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative uncharacterized protein
A, B
155Streptococcus mutans serotype c (strain ATCC 700610 / UA159)Mutation(s): 0 
Find proteins for Q8DVN6 (Streptococcus mutans serotype c (strain ATCC 700610 / UA159))
Go to UniProtKB:  Q8DVN6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.377 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.211 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 93.400α = 90.00
b = 99.680β = 90.00
c = 45.290γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
MAR345dtbdata collection
SCALEPACKdata scaling
PHENIXrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-08-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2018-05-23
    Type: Advisory, Data collection