2BLM

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Observed: 0.208 

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
  • Structures With Same Primary Citation

  • 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-LACTAMASEA, B265Bacillus licheniformisMutation(s): 0 
Gene Names: penPblaP
EC: 3.5.2.6
Find proteins for P00808 (Bacillus licheniformis)
Explore P00808 
Go to UniProtKB:  P00808
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Observed: 0.208 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.8α = 90
b = 90.7β = 104.5
c = 43.6γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

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