3ftf

X-ray diffraction
2.8Å resolution

Crystal structure of A. aeolicus KsgA in complex with RNA and SAH

Released:

Function and Biology Details

Reaction catalysed:
4 S-adenosyl-L-methionine + adenine(1518)/adenine(1519) in 16S rRNA = 4 S-adenosyl-L-homocysteine + N(6)-dimethyladenine(1518)/N(6)-dimethyladenine(1519) in 16S rRNA 
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
hetero trimer (preferred)
PDBe Complex ID:
PDB-CPX-130533 (preferred)
Entry contents:
1 distinct polypeptide molecule
1 distinct RNA molecule
Macromolecules (2 distinct):
Ribosomal RNA small subunit methyltransferase A Chain: A
Molecule details ›
Chain: A
Length: 249 amino acids
Theoretical weight: 28.48 KDa
Source organism: Aquifex aeolicus VF5
Expression system: Escherichia coli
UniProt:
  • Canonical: O67680 (Residues: 1-248; Coverage: 100%)
Gene names: aq_1816, ksgA, rsmA
Sequence domains: Ribosomal RNA adenine dimethylase
Structure domains:
5'-R(P*AP*AP*CP*CP*GP*UP*AP*GP*GP*GP*GP*AP*AP*CP*CP*UP*GP*CP*GP*GP*UP*U)-3' Chains: C, D
Molecule details ›
Chains: C, D
Length: 22 nucleotides
Theoretical weight: 7.11 KDa
Source organism: Aquifex aeolicus VF5
Expression system: Not provided

Ligands and Environments


Cofactor: Ligand SAH 1 x SAH
1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 22-BM
Spacegroup: P21
Unit cell:
a: 43.13Å b: 58.074Å c: 68.981Å
α: 90° β: 109.82° γ: 90°
R-values:
R R work R free
0.241 0.239 0.288
Expression systems:
  • Escherichia coli
  • Not provided