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Crystal structure of the coenzyme F420-dependent sulfite reductase from methanothermococcus thermolithotrophicus at 1.55-a resolution

Analyse Crystal structure of the coenzyme F420-dependent sulfite reductase from… in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
7NPA
Type
protein
Length
9,878 residues
Chains
16
Method
x-ray diffraction
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Coenzyme F420-dependent sulfite reductase
EC
1.8.98.3
UniProt
A0A2Z5PF12
Ligands
SF4, FAD, SRM, LI, SO4, CL, H2S
Pockets
20 · best druggability 0.86

Structure

x-ray diffraction · 3 distinct chains · 34% helix, 23% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
A, B, C, F, G, I, JCoenzyme F420-dependent sulfite reductase (EC 1.8.98.3)protein61834% helix, 23% strandA0A2Z5PF12
D, E, H, K, L, M, O, PCoenzyme F420-dependent sulfite reductase (EC 1.8.98.3)protein61734% helix, 23% strandA0A2Z5PF12
NCoenzyme F420-dependent sulfite reductase (EC 1.8.98.3)protein61634% helix, 24% strandA0A2Z5PF12

Ligands and binding sites

  • SF4 · Iron/sulfur cluster · ligand · 97 copies · chains A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P
  • FAD · Flavin-adenine dinucleotide · ligand · 17 copies · chains A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P
  • SRM · Siroheme · ligand · 16 copies · chains A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P
  • LI · Lithium ion · metal · 4 copies · chains A, C, F, H, J, L, N, P
  • SO4 · Sulfate ion · ion · 31 copies · chains A, B, C, D, E, F, G, H, I, J, K, L, M, P, N, O
  • CL · Chloride ion · ion · 29 copies · chains A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P
  • H2S · Hydrosulfuric acid · ion · 16 copies · chains A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P
  • EDO · 1,2-ethanediol · additive · 123 copies · chains A, B, D, C, E, F, H, G, I, J, O, P, L, K, M, N
  • GOL · Glycerol · additive · 19 copies · chains A, B, C, E, F, G, I, J, L, K, M, P, N, O
  • PEG · Di(hydroxyethyl)ether · additive · 5 copies · chains C, D, K, L, M, N, O
  • TRS · 2-amino-2-hydroxymethyl-propane-1,3-diol · additive · 2 copies · chains H, I, O

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

Pockets

20 pockets found on a 1 Å grid, 20 with a druggability of 0.5 or more.

PocketVolume (ų)DruggabilityBuriednessLining residuesInside
19930.860.87111SRM, EDO, SO4, H2S, SF4
29830.860.87114SRM, SO4, H2S, SF4, EDO
35450.850.9169FAD
45560.850.9170FAD
59360.850.87117SF4, EDO, SRM, SO4, H2S

Interfaces

33 interfaces between chains.

  • K–L · 3276 Ų buried · 52 hydrogen bonds · protein-protein
  • I–J · 3239 Ų buried · 54 hydrogen bonds · protein-protein
  • G–H · 3224 Ų buried · 53 hydrogen bonds · protein-protein
  • E–F · 3209 Ų buried · 54 hydrogen bonds · protein-protein
  • C–D · 3207 Ų buried · 52 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 4 cofactor (flavinylation).

Compared structures

  • 7NPA · Crystal structure of the Coenzyme F420-dependent sulfite reductase from… · the same entry in another collection · chain A against A, TM-score 1.00

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