SMTL ID : 9i23.2 (1 other biounit)

Structure of Human helicase RecQ1- 795-2T G-quadruplex - ADP complex

Coordinates

PDB Format Compare

Method

X-RAY DIFFRACTION 3.69 Å

Oligo State

monomer

Ligands

1 x ZN: ZINC ION(Non-covalent)

ZN.1: 4 residues within 4Å: Chain A: C.392, C.410, C.414, C.417 4 PLIP interactions: 4 interactions with chain A Metal complexes: A:C.392, A:C.410, A:C.414, A:C.417

1 x ADP: ADENOSINE-5'-DIPHOSPHATE(Non-covalent)

ADP.2: 17 residues within 4Å: Chain A: L.28, K.30, F.31, R.32, Q.35, P.53, T.54, G.55, G.56, G.57, K.58, S.59, L.60, Q.86, M.315, D.318 Ligands: MG.3 14 PLIP interactions: 14 interactions with chain A Hydrogen bonds: A:K.30, A:R.32, A:R.32, A:R.32, A:Q.35, A:G.55, A:G.56, A:G.57, A:K.58, A:S.59, A:Q.86 Salt bridges: A:K.58 pi-Cation interactions: A:R.32, A:R.32

1 x MG: MAGNESIUM ION(Non-covalent)

MG.3: 4 residues within 4Å: Chain A: K.58, D.158, M.315 Ligands: ADP.2 No protein-ligand interaction detected (PLIP)

2 x K: POTASSIUM ION(Non-functional Binders)

K.4: 9 residues within 4Å: Chain B: G.2, G.3, G.6, G.7, G.10, G.11, G.14, G.15 Ligands: K.5 No protein-ligand interaction detected (PLIP) K.5: 8 residues within 4Å: Chain B: G.3, G.4, G.7, G.11, G.12, G.15, G.16 Ligands: K.4 No protein-ligand interaction detected (PLIP)

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Song, Z.Y. et al., Structural mechanism of RECQ1 helicase in unfolding G-quadruplexes compared with duplex DNA. Nucleic Acids Res. (2025)

Release Date

2025-10-01

Peptides

ATP-dependent DNA helicase Q1: A

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
B

ATP-dependent DNA helicase Q1

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