SMTL ID : 1tlf.1

UNPRECEDENTED QUATERNARY STRUCTURE OF E. COLI LAC REPRESSOR CORE TETRAMER: IMPLICATIONS FOR DNA LOOPING

Coordinates

PDB Format Compare

Method

X-RAY DIFFRACTION 2.60 Å

Oligo State

homo-tetramer

Ligands

4 x EMC: ETHYL MERCURY ION(Non-covalent)

EMC.1: 5 residues within 4Å: Chain A: S.221, C.222, R.267 Chain B: M.164, R.196 2 PLIP interactions: 2 interactions with chain A Metal complexes: A:S.221, A:C.222 EMC.3: 5 residues within 4Å: Chain A: M.164, R.196 Chain B: S.221, C.222, R.267 1 PLIP interactions: 1 interactions with chain B Metal complexes: B:C.222 EMC.5: 6 residues within 4Å: Chain C: S.221, C.222, R.267 Chain D: M.164, F.167, R.196 No protein-ligand interaction detected (PLIP) EMC.7: 8 residues within 4Å: Chain C: M.164, F.167, R.196 Chain D: D.216, E.218, S.221, C.222, K.231 1 PLIP interactions: 1 interactions with chain D Metal complexes: D:C.222

4 x IPT: 1-methylethyl 1-thio-beta-D-galactopyranoside(Non-covalent)

IPT.2: 16 residues within 4Å: Chain A: S.10, L.14, A.16, P.17, I.20, N.66, P.68, L.89, D.90, S.134, R.138, W.161, A.186, N.187, D.215, Q.232 6 PLIP interactions: 6 interactions with chain A Hydrophobic interactions: A:I.20 Hydrogen bonds: A:S.10, A:R.138, A:R.138, A:N.187, A:D.215 IPT.4: 18 residues within 4Å: Chain B: S.10, L.14, A.16, P.17, I.20, R.42, N.66, L.89, D.90, S.132, S.134, R.138, W.161, A.186, N.187, Y.214, D.215, Q.232 8 PLIP interactions: 8 interactions with chain B Hydrophobic interactions: B:I.20 Hydrogen bonds: B:S.10, B:R.42, B:R.138, B:R.138, B:N.187, B:D.215, B:Q.232 IPT.6: 16 residues within 4Å: Chain C: S.10, L.14, A.16, P.17, I.20, R.42, N.66, L.89, D.90, S.134, R.138, W.161, A.186, N.187, D.215, Q.232 10 PLIP interactions: 10 interactions with chain C Hydrophobic interactions: C:I.20 Hydrogen bonds: C:S.10, C:A.16, C:R.42, C:R.42, C:R.138, C:R.138, C:N.187, C:D.215, C:Q.232 IPT.8: 17 residues within 4Å: Chain D: S.10, L.14, A.16, P.17, R.42, N.66, P.68, L.89, D.90, S.132, S.134, R.138, W.161, A.186, N.187, D.215, Q.232 9 PLIP interactions: 9 interactions with chain D Hydrophobic interactions: D:D.90 Hydrogen bonds: D:S.10, D:R.42, D:R.42, D:R.138, D:R.138, D:N.187, D:D.215, D:Q.232

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Friedman, A.M. et al., Crystal structure of lac repressor core tetramer and its implications for DNA looping. Science (1995)

Release Date

1995-07-31

Peptides

LAC REPRESSOR: ABCD

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

B
B

C
C

D
D

LAC REPRESSOR