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Human GTP cyclohydrolase I in complex with allosteric inhibitor

Analyse Human GTP cyclohydrolase I in complex with allosteric inhibitor in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
6Z89
Type
protein
Length
821 residues
Chains
5
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
GTP cyclohydrolase 1
EC
3.5.4.16
UniProt
P30793
Ligands
QBK, ZN
Pockets
10 · best druggability 0.77

Structure

x-ray diffraction · 5 distinct chains · 44% helix, 29% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
AGTP cyclohydrolase 1 (EC 3.5.4.16)protein18146% helix, 27% strandP30793
BGTP cyclohydrolase 1 (EC 3.5.4.16)protein17345% helix, 26% strandP30793
CGTP cyclohydrolase 1 (EC 3.5.4.16)protein12035% helix, 42% strandP30793
DGTP cyclohydrolase 1 (EC 3.5.4.16)protein18046% helix, 27% strandP30793
EGTP cyclohydrolase 1 (EC 3.5.4.16)protein16746% helix, 26% strandP30793

Ligands and binding sites

  • QBK · 5-azanyl-[1,3]thiazolo[5,4-d]pyrimidine-2,7-dione · ligand · 2 copies · chains A, B, D, E
  • ZN · Zinc ion · metal · 5 copies · chains A, B, C, D, E

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

Pockets

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

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
18840.770.8076empty
2570.590.9121ZN
3710.530.8623empty
41040.480.8020ZN
51520.480.7720QBK

Interfaces

7 interfaces between chains.

  • C–D · 1072 Ų buried · 17 hydrogen bonds · protein-protein
  • B–C · 1062 Ų buried · 18 hydrogen bonds · protein-protein
  • A–E · 1018 Ų buried · 16 hydrogen bonds · protein-protein
  • D–E · 968 Ų buried · 16 hydrogen bonds · protein-protein
  • A–B · 950 Ų buried · 15 hydrogen bonds · protein-protein

Compared structures

  • 6Z89 · human GTP cyclohydrolase I in complex with allosteric inhibitor · the same entry in another collection · chain E against E, TM-score 1.00
  • P30793 · AlphaFold monomer V2.0 prediction for GTP cyclohydrolase 1 (P30793) · a predicted model of the same protein · chain C against A, TM-score 0.99

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