5MU4

Tail Tubular Protein A of Klebsiella pneumoniae bacteriophage KP32


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Tail tubular protein A: a dual-function tail protein of Klebsiella pneumoniae bacteriophage KP32.

Pyra, A.Brzozowska, E.Pawlik, K.Gamian, A.Dauter, M.Dauter, Z.

(2017) Sci Rep 7: 2223-2223

  • DOI: 10.1038/s41598-017-02451-3
  • Primary Citation of Related Structures:  
    5MU4

  • PubMed Abstract: 
  • Tail tubular protein A (TTPA) is a structural tail protein of Klebsiella pneumoniae bacteriophage KP32, and is responsible for adhering the bacteriophage to host cells. For the first time, we found that TTPA also exhibits lytic activity towards capsular exopolysaccharide (EPS) of the multiresistant clinical strain of Klebsiella pneumoniae, PCM2713, and thus should be regarded as a dual-function macromolecule that exhibits both structural and enzymatic actions ...

    Tail tubular protein A (TTPA) is a structural tail protein of Klebsiella pneumoniae bacteriophage KP32, and is responsible for adhering the bacteriophage to host cells. For the first time, we found that TTPA also exhibits lytic activity towards capsular exopolysaccharide (EPS) of the multiresistant clinical strain of Klebsiella pneumoniae, PCM2713, and thus should be regarded as a dual-function macromolecule that exhibits both structural and enzymatic actions. Here, we present our crystallographic and enzymatic studies of TTPA. TTPA was crystallized and X-ray diffraction data were collected to a resolution of 1.9 Å. In the crystal, TTPA molecules were found to adopt a tetrameric structure with α-helical domains on one side and β-strands and loops on the other. The novel crystal structure of TTPA resembles those of the bacteriophage T7 tail protein gp11 and gp4 of bacteriophage P22, but TTPA contains an additional antiparallel β-sheet carrying a lectin-like domain that could be responsible for EPS binding. The enzymatic activity of TTPA may reflect the presence of a peptidoglycan hydrolase domain in the α-helical region (amino acid residues 126 to 173). These novel results provide new insights into the enzymatic mechanism through which TTPA acts on polysaccharides.


    Organizational Affiliation

    Synchrotron Radiation Research Section, MCL, National Cancer Institute, Argonne National Laboratory, Argonne, IL, 60439, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Tail tubular protein AA, B, C, D201Klebsiella phage KP32Mutation(s): 0 
Gene Names: 31
UniProt
Find proteins for D1L2W4 (Klebsiella phage KP32)
Explore D1L2W4 
Go to UniProtKB:  D1L2W4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD1L2W4
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 138.32α = 90
b = 138.32β = 90
c = 102.93γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
SHELXDEphasing
HKL-2000data scaling
HKLdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-05-31
    Type: Initial release
  • Version 1.1: 2017-06-07
    Changes: Data collection, Database references