X-ray diffraction
1.36Å resolution

CTX-M-9 class A beta-lactamase complexed with compound 11

Source organism: Escherichia coli
Entry authors: Nichols DA, Chen Y

Function and Biology Details

Reaction catalysed:
A beta-lactam + H(2)O = a substituted beta-amino acid
Biochemical function:
Biological process:
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Beta-lactamase Chains: A, B
Molecule details ›
Chains: A, B
Length: 263 amino acids
Theoretical weight: 27.96 KDa
Source organism: Escherichia coli
Expression system: Escherichia coli BL21(DE3)
  • Canonical: Q9L5C8 (Residues: 29-291; Coverage: 100%)
Gene names: RCS51_P0174, bla CTX-M-9, blaCTX-M-9, blaCTX-M-9a, blaCTX-M-9b
Sequence domains: Beta-lactamase enzyme family
Structure domains: DD-peptidase/beta-lactamase superfamily

Ligands and Environments

2 bound ligands:
1 modified residue:

Experiments and Validation Details

Entry percentile scores
X-ray source: NSLS BEAMLINE X6A
Spacegroup: P21
Unit cell:
a: 45.245Å b: 106.941Å c: 47.681Å
α: 90° β: 100.97° γ: 90°
R R work R free
0.158 0.156 0.199
Expression system: Escherichia coli BL21(DE3)