X-ray structure of the complex between human alpha thrombin and a thrombin binding aptamer variant (tba-3LEU), which contains leucyl amide in the side chain of THY3 at N3.

Structure

x-ray diffraction · 3 distinct chains · 14% helix, 31% strand (DSSP).

Ligands and binding sites

• 0G6 · D-phenylalanyl-N-[(2S,3S)-6-{[amino(iminio)methyl]amino}-1-chloro-2-hydroxyhexan-3-yl]-L-prolinamide · ligand · chains H
• NA · Sodium ion · metal · chains H
• K · Potassium ion · metal · chains B

Binding sites are the residues within 4.5 Å of a ligand's heavy atoms.

Pockets

3 pockets found on a 1 Å grid, 1 with a druggability of 0.5 or more.

Interfaces

2 interfaces between chains.

• L–H · 974 Ų buried · 24 hydrogen bonds · protein-protein
• H–B · 605 Ų buried · 24 hydrogen bonds · protein-nucleic

Modifications

Observed in the structure: 4 disulfide, 2 covalent, 1 modified (disulfide, covalent ligand, nucleotide modification).

Compared structures

• 6Z8X · X-ray structure of the complex between human alpha thrombin and a thrombin binding… · the same entry in another collection · chain L against L, TM-score 1.00
• P00734 · AlphaFold monomer V2.0 prediction for prothrombin (P00734) · a predicted model of the same protein · chain H against A, TM-score 0.92

Analyse

• Open in the research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides and crosslinks on the 3D structure
• Every structure of UniProt P00734
• Elsewhere: RCSB PDB 6Z8X · PDBe 6Z8X · UniProt P00734