SMTL ID : 3br3.1 (1 other biounit)

Crystal Structure of the Complex of Ethidium Bound to QacR(E90Q), a Mutant of a Multidrug Binding Transcriptional Repressor

Coordinates

PDB Format Compare

Method

X-RAY DIFFRACTION 2.80 Å

Oligo State

homo-dimer

Ligands

8 x SO4: SULFATE ION(Non-functional Binders)

SO4.1: 4 residues within 4Å: Chain A: R.76, Y.80, Q.180, N.184 6 PLIP interactions: 6 interactions with chain A Hydrogen bonds: A:Y.80, A:Q.180, A:N.184 Water bridges: A:R.76, A:N.184 Salt bridges: A:R.76 SO4.2: 2 residues within 4Å: Chain A: L.186, S.187 No protein-ligand interaction detected (PLIP) SO4.3: 4 residues within 4Å: Chain A: I.142, N.143, D.144 Chain B: K.177 3 PLIP interactions: 1 interactions with chain B, 2 interactions with chain A Salt bridges: B:K.177 Hydrogen bonds: A:N.143, A:D.144 SO4.4: 3 residues within 4Å: Chain A: K.4, N.38, H.42 2 PLIP interactions: 2 interactions with chain A Hydrogen bonds: A:K.4 Salt bridges: A:H.42 SO4.5: 2 residues within 4Å: Chain A: H.128, K.132 2 PLIP interactions: 2 interactions with chain A Salt bridges: A:H.128, A:K.132 SO4.7: 2 residues within 4Å: Chain B: K.30, E.33 1 PLIP interactions: 1 interactions with chain B Salt bridges: B:K.30 SO4.8: 2 residues within 4Å: Chain B: H.128, K.132 2 PLIP interactions: 2 interactions with chain B Salt bridges: B:H.128, B:K.132 SO4.9: 2 residues within 4Å: Chain B: W.140, S.141 No protein-ligand interaction detected (PLIP)

1 x ET: ETHIDIUM(Non-covalent)

ET.6: 10 residues within 4Å: Chain B: W.61, S.86, Q.90, Q.96, M.116, E.120, Y.123, A.153, N.154, N.157 8 PLIP interactions: 8 interactions with chain B Hydrophobic interactions: B:W.61, B:E.120, B:Y.123, B:N.157 Hydrogen bonds: B:Q.90, B:N.154 pi-Stacking: B:Y.123, B:Y.123

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Brooks, B.E. et al., Formal electrostatic interactions do not govern QacR-cation affinity. To be Published

Release Date

2008-12-23

Peptides

HTH-type transcriptional regulator qacR: AB

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
B

B
A

HTH-type transcriptional regulator qacR

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