Potassium in PDB 4aya: Crystal Structure of ID2 Hlh Homodimer at 2.1A Resolution

The structure of Crystal Structure of ID2 Hlh Homodimer at 2.1A Resolution, PDB code: 4aya was solved by M.V.Wong, S.Jiang, P.Palasingam, P.R.Kolatkar, with X-Ray Crystallography technique. A brief refinement statistics is given in the table below:

Resolution Low / High (Å)	44.706 / 2.10
Space group	P 32 2 1
Cell size a, b, c (Å), α, β, γ (°)	51.622, 51.622, 111.474, 90.00, 90.00, 120.00
R / Rfree (%)	22.46 / 24.97

The binding sites of Potassium atom in the Crystal Structure of ID2 Hlh Homodimer at 2.1A Resolution (pdb code 4aya). 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 ID2 Hlh Homodimer at 2.1A Resolution, PDB code: 4aya:
Jump to Potassium binding site number: 1; 2;

Potassium binding site 1 out of 2 in the Crystal Structure of ID2 Hlh Homodimer at 2.1A Resolution


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 ID2 Hlh Homodimer at 2.1A Resolution within 5.0Å range: probe atom residue distance (Å) B Occ A:K1089 b:54.3 occ:1.00 O A:ILE53 2.6 57.0 1.0 O A:VAL50 2.7 51.2 1.0 O A:LYS47 2.7 51.5 1.0 OE1 A:GLN55 3.0 72.8 1.0 O A:HOH2001 3.1 58.0 1.0 C A:VAL50 3.5 53.8 1.0 O A:PRO51 3.7 54.6 1.0 C A:ILE53 3.7 55.3 1.0 CD A:GLN55 3.8 68.5 1.0 CG A:GLN55 3.8 66.3 1.0 O A:GLU48 3.9 59.8 1.0 CA A:PRO51 3.9 54.9 1.0 C A:LYS47 3.9 54.2 1.0 C A:PRO51 4.0 50.0 1.0 N A:PRO51 4.1 50.0 1.0 N A:ILE53 4.2 53.2 1.0 CB A:ILE53 4.2 50.9 1.0 CA A:ILE53 4.2 52.4 1.0 C A:GLU48 4.3 55.3 1.0 CA A:GLU48 4.4 57.1 1.0 N A:VAL50 4.4 53.3 1.0 CA A:VAL50 4.6 52.1 1.0 N A:GLU48 4.6 54.1 1.0 N A:PRO54 4.9 58.8 1.0 CG2 A:ILE53 4.9 53.0 1.0 N A:SER52 5.0 50.5 1.0 CA A:LYS47 5.0 51.2 1.0

Potassium binding site 2 out of 2 in the Crystal Structure of ID2 Hlh Homodimer at 2.1A Resolution


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 ID2 Hlh Homodimer at 2.1A Resolution within 5.0Å range: probe atom residue distance (Å) B Occ B:K1083 b:49.3 occ:1.00 O B:LYS47 2.6 49.4 1.0 O B:VAL50 2.6 43.7 1.0 O B:ILE53 2.7 44.6 1.0 O B:HOH2007 2.8 54.0 1.0 OE1 B:GLN55 2.9 57.4 1.0 C B:VAL50 3.6 46.1 1.0 CD B:GLN55 3.6 54.7 1.0 O B:PRO51 3.7 49.4 1.0 CG B:GLN55 3.7 52.4 1.0 C B:ILE53 3.8 45.5 1.0 C B:LYS47 3.8 48.8 1.0 O B:GLU48 3.9 56.5 1.0 C B:PRO51 4.0 45.6 1.0 CA B:PRO51 4.0 47.7 1.0 N B:ILE53 4.2 43.7 1.0 N B:PRO51 4.2 49.3 1.0 C B:GLU48 4.2 51.9 1.0 O B:HOH2004 4.3 57.8 1.0 CA B:ILE53 4.4 43.5 1.0 CA B:GLU48 4.4 53.8 1.0 CB B:ILE53 4.5 44.6 1.0 N B:VAL50 4.6 45.5 1.0 N B:GLU48 4.6 49.6 1.0 O B:HOH2006 4.7 48.8 1.0 CA B:VAL50 4.7 46.7 1.0 NE2 B:GLN55 4.8 57.2 1.0 CA B:LYS47 4.8 49.5 1.0 N B:SER52 4.9 45.0 1.0 N B:PRO54 4.9 44.1 1.0

M.V.Wong, S.Jiang, P.Palasingam, P.R.Kolatkar. A Divalent Ion Is Crucial in the Structure and Dominant- Negative Function of Id Proteins, A Class of Helix-Loop- Helix Transcription Regulators. Plos One V. 7 48591 2012.
ISSN: ISSN 1932-6203
PubMed: 23119064
DOI: 10.1371/JOURNAL.PONE.0048591