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Type III-a csm complex, cryo-EM structure of csm-ntr, ATP bound

Analyse Type III-a csm complex, cryo-EM structure of csm-ntr, ATP bound in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
6IFR
Type
protein + RNA
Length
2,286 residues
Chains
10
Method
electron microscopy
Collection
MolNFT v1 / PDB
Contract
0xDE3723766Bc32dcACD03C17BaA400A7B36837Eba
Owner
0x3396CDB397284571d12822B4ae1189a8E22AAAAA
Molecule
Type III-a CRISPR-associated protein CSM1; Type III-a CRISPR-associated protein CSM2…
UniProt
A0A2U2M0F3, A0A2U2M049, A0A2U2M035, A0A2U2M037, A0A2U2M038
Ligands
ATP, MG
Pockets
20 · best druggability 0.85

Structure

electron microscopy · 9 distinct chains · 29% helix, 16% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
AType III-a CRISPR-associated protein CSM1protein69443% helix, 9% strandA0A2U2M0F3
D, CType III-a CRISPR-associated protein CSM2protein12161% helix, 2% strandA0A2U2M049
GType III-a CRISPR-associated ramp protein CSM3protein21719% helix, 24% strandA0A2U2M035
FType III-a CRISPR-associated ramp protein CSM3protein21717% helix, 27% strandA0A2U2M035
EType III-a CRISPR-associated ramp protein CSM3protein20518% helix, 22% strandA0A2U2M035
BType III-a CRISPR-associated ramp protein CSM4protein28817% helix, 19% strandA0A2U2M037
HType III-a CRISPR-associated ramp protein CSM5protein35321% helix, 15% strandA0A2U2M038
NType III-a CRISPR-CAS interference complex, crrnarna35——
JType III-a CRISPR-CAS interference complex, ntrrna35——

Ligands and binding sites

  • ATP · Adenosine-5'-triphosphate · ligand · 2 copies · chains A, B
  • MG · Magnesium ion · metal · 2 copies · chains A

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
110120.850.8682empty
23650.840.9442empty
32370.830.9628empty
46010.830.8954empty
511960.820.8399empty

Interfaces

34 interfaces between chains.

  • G–H · 1558 Ų buried · 17 hydrogen bonds · protein-protein
  • B–N · 1542 Ų buried · 45 hydrogen bonds · protein-nucleic
  • E–B · 1532 Ų buried · 21 hydrogen bonds · protein-protein
  • G–F · 1435 Ų buried · 6 hydrogen bonds · protein-protein
  • F–E · 1370 Ų buried · 15 hydrogen bonds · protein-protein

Modifications

Observed in the structure: 1 covalent (covalent ligand).

Compared structures

  • 6IFR · Type III-A Csm complex, Cryo-EM structure of Csm-NTR, ATP bound · the same entry in another collection · chain A against A, TM-score 1.00

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