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Cryo-EM structure of RecBCD+DNA complex revealing activated nuclease domain

Analyse Cryo-EM structure of RecBCD+DNA complex revealing activated nuclease domain in the GL1X research workbench: secondary structure, accessibility, pockets, interfaces, conservation, variants, modifications, peptides, crosslinks and neighbours on the 3D structure.

PDB
5LD2
Type
protein + DNA
Length
2,928 residues
Chains
4
Method
electron microscopy
Collection
MolNFT v2 / PDB Bank
Contract
0xd58B01f6C18086e5202cdC5D7Ad3E41790360102
Owner
0xF4e1AA6f26B7DA48EeAD9B24a97927303eeA07b8
Resolution
3.83
Source
Escherichia coli (strain K12); SYNTHETIC CONSTRUCT
Molecule
RecBCD enzyme subunit RecB,RecBCD enzyme subunit RecB,RecBCD enzyme subunit RecB; RecBCD…
EC
3.1.11.5
UniProt
P08394, P07648, P04993
Ligands
ANP, MG
Pockets
20 · best druggability 0.82

Structure

electron microscopy · resolution 3.83 · 4 distinct chains · 47% helix, 13% strand (DSSP).

ChainMoleculeTypeResiduesSecondary structureUniProt
BRecBCD enzyme subunit RecB,RecBCD enzyme subunit RecB,RecBCD enzyme subunit RecB (EC 3.1.11.5)protein115148% helix, 13% strandP08394
CRecBCD enzyme subunit RecC (EC 3.1.11.5)protein112147% helix, 12% strandP07648
DRecBCD enzyme subunit RecD (EC 3.1.11.5)protein60544% helix, 15% strandP04993
XFork-Hairpin DNA (70-MER)dna51——

Ligands and binding sites

  • ANP · Phosphoaminophosphonic acid-adenylate ester · ligand · chains B
  • MG · Magnesium ion · metal · chains B

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
17560.820.8587empty
28810.800.8394empty
35860.770.8468empty
45210.750.8355empty
55040.730.8265ANP, MG

Interfaces

6 interfaces between chains.

  • B–C · 7345 Ų buried · 72 hydrogen bonds · protein-protein
  • C–D · 1386 Ų buried · 10 hydrogen bonds · protein-protein
  • B–X · 1247 Ų buried · 16 hydrogen bonds · protein-nucleic
  • D–X · 958 Ų buried · 12 hydrogen bonds · protein-nucleic
  • C–X · 783 Ų buried · 10 hydrogen bonds · protein-nucleic

Compared structures

  • 5LD2 · Cryo-EM structure of RECBCD+DNA complex revealing activated nuclease domain · the same entry in another collection · chain B against B, TM-score 1.00
  • P07648 · AlphaFold monomer V2.0 prediction for recbcd enzyme subunit recc (P07648) · a predicted model of the same protein · chain C against A, TM-score 0.96
  • P04993 · AlphaFold monomer V2.0 prediction for recbcd enzyme subunit recd (P04993) · a predicted model of the same protein · chain D against A, TM-score 0.96
  • P08394 · AlphaFold monomer V2.0 prediction for recbcd enzyme subunit recb (P08394) · a predicted model of the same protein · chain B against A, TM-score 0.82

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