2BLM

BETA-LACTAMASE OF BACILLUS LICHENIFORMIS 749(SLASH)C AT 2 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Beta-lactamase of Bacillus licheniformis 749/C at 2 A resolution.

Moews, P.C.Knox, J.R.Dideberg, O.Charlier, P.Frere, J.M.

(1990) Proteins 7: 156-171

  • DOI: 10.1002/prot.340070205

  • PubMed Abstract: 
  • Two crystal forms (A and B) of the 29,500 Da Class A beta-lactamase (penicillinase) from Bacillus licheniformis 749/C have been examined crystallographically. The structure of B-form crystals has been solved to 2 A resolution, the starting model for ...

    Two crystal forms (A and B) of the 29,500 Da Class A beta-lactamase (penicillinase) from Bacillus licheniformis 749/C have been examined crystallographically. The structure of B-form crystals has been solved to 2 A resolution, the starting model for which was a 3.5 A structure obtained from A-form crystals. The beta-lactamase has an alpha + beta structure with 11 helices and 5 beta-strands seen also in a penicillin target DD-peptidase of Streptomyces R61. Atomic parameters of the two molecules in the asymmetric unit were refined by simulated annealing at 2.0 A resolution. The R factor is 0.208 for the 27,330 data greater than 3 sigma (F), with water molecules excluded from the model. The catalytic Ser-70 is at the N-terminus of a helix and is within hydrogen bonding distance of conserved Lys-73. Also interacting with the Lys-73 are Asn-132 and the conserved Glu-166, which is on a potentially flexible helix-containing loop. The structure suggests the binding of beta-lactam substrates is facilitated by interactions with Lys-234, Thr-235, and Ala-237 in a conserved beta-strand peptide, which is antiparallel to the beta-lactam's acylamido linkage; an exposed cavity near Asn-170 exists for acylamido substituents. The reactive double bond of clavulanate-type inhibitors may interact with Arg-244 on the fourth beta-strand. A very similar binding site architecture is seen in the DD-peptidase.


    Related Citations: 
    • Crystallographic Comparison of Penicillin-Recognizing Enzymes
      Knox, J.R.,Kelly, J.A.
      (1989) Molecular Recognition. Chemical and Biochemical Problems --: 46
    • On the Origin of Bacterial Resistance to Penicillin. Comparison of a Beta-Lactamase and a Penicillin Target
      Kelly, J.A.,Dideberg, O.,Charlier, P.,Wery, J.P.,Libert, M.,Moews, P.C.,Knox, J.R.,Duez, C.,Fraipont, C.,Joris, B.,Dusart, J.,Frere, J.M.,Ghuysen, J.M.
      (1986) Science 231: 1429


    Organizational Affiliation

    Department of Molecular and Cell Biology, University of Connecticut, Storrs 06269.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BETA-LACTAMASE
A, B
265Bacillus licheniformisGene Names: penP (blaP)
EC: 3.5.2.6
Find proteins for P00808 (Bacillus licheniformis)
Go to UniProtKB:  P00808
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 66.800α = 90.00
b = 90.700β = 104.50
c = 43.600γ = 90.00
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1990-10-15
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance