Potassium in PDB 1xra: Crystal Structure of S-Adenosylmethionine Synthetase

All present enzymatic activity of Crystal Structure of S-Adenosylmethionine Synthetase:
2.5.1.6;

The structure of Crystal Structure of S-Adenosylmethionine Synthetase, PDB code: 1xra was solved by F.Takusagawa, S.Kamitori, S.Misaki, G.D.Markham, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	10.00 / 3.00
Space group	P 62 2 2
Cell size a, b, c (Å), α, β, γ (°)	128.900, 128.900, 139.800, 90.00, 90.00, 120.00
R / Rfree (%)	18.9 / 26

The structure of Crystal Structure of S-Adenosylmethionine Synthetase also contains other interesting chemical elements:

Magnesium

(Mg)

2 atoms

The binding sites of Potassium atom in the Crystal Structure of S-Adenosylmethionine Synthetase (pdb code 1xra). This binding sites where shown within 5.0 Angstroms radius around Potassium atom.
In total 2 binding sites of Potassium where determined in the Crystal Structure of S-Adenosylmethionine Synthetase, PDB code: 1xra:
Jump to Potassium binding site number: 1; 2;

Potassium binding site 1 out of 2 in the Crystal Structure of S-Adenosylmethionine Synthetase


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 1 of Crystal Structure of S-Adenosylmethionine Synthetase within 5.0Å range: probe atom residue distance (Å) B Occ A:K413 b:56.8 occ:1.00 OE2 A:GLU42 2.8 36.0 1.0 OE1 A:GLU42 2.9 20.2 1.0 CD A:GLU42 3.0 23.2 1.0 O A:SER263 3.1 24.8 1.0 CD A:LYS265 3.5 22.8 1.0 HG1 A:THR242 3.6 17.6 0.0 OG1 A:THR242 3.9 16.9 1.0 CG A:LYS265 4.0 21.5 1.0 CG A:GLU42 4.0 13.3 1.0 O4 A:PO4385 4.1 0.3 1.0 HZ3 A:LYS265 4.2 17.6 0.0 C A:SER263 4.3 22.2 1.0 O A:CYS41 4.4 28.4 1.0 CE A:LYS265 4.5 33.8 1.0 H A:CYS41 4.6 17.6 0.0 NZ A:LYS265 4.7 44.9 1.0 O2 A:PO4385 4.8 0.3 1.0 C A:CYS41 4.8 19.1 1.0 CB A:ALA261 4.8 19.2 1.0 C A:GLY264 4.9 22.3 1.0 CA A:GLU42 4.9 5.6 1.0 HZ1 A:LYS265 4.9 17.6 0.0 CB A:GLU42 4.9 4.0 1.0 CA A:GLY264 4.9 21.0 1.0 N A:CYS41 5.0 15.0 1.0

Potassium binding site 2 out of 2 in the Crystal Structure of S-Adenosylmethionine Synthetase


Mono view


Stereo pair view

A full contact list of Potassium with other atoms in the K binding site number 2 of Crystal Structure of S-Adenosylmethionine Synthetase within 5.0Å range: probe atom residue distance (Å) B Occ A:K414 b:90.7 occ:0.50 O A:GLY243 2.5 20.2 1.0 C A:GLY243 3.8 17.8 1.0 CB A:ILE246 4.1 17.9 1.0 CD A:ARG244 4.1 11.6 1.0 CA A:ARG244 4.2 18.7 1.0 O A:ARG244 4.2 30.0 1.0 H A:ILE246 4.2 17.6 0.0 CG1 A:ILE246 4.2 24.1 1.0 N A:ARG244 4.5 14.2 1.0 CG2 A:ILE246 4.5 4.8 1.0 C A:ARG244 4.5 22.1 1.0 CA A:GLY243 4.8 16.7 1.0 O A:GLY259 4.8 33.6 1.0 CG A:ARG244 4.9 13.0 1.0 N A:ILE246 5.0 19.6 1.0

F.Takusagawa, S.Kamitori, S.Misaki, G.D.Markham. Crystal Structure of S-Adenosylmethionine Synthetase. J.Biol.Chem. V. 271 136 1996.
ISSN: ISSN 0021-9258
PubMed: 8550549
DOI: 10.1074/JBC.271.1.136