SMTL ID : 1drb.1

CRYSTAL STRUCTURE OF UNLIGANDED ESCHERICHIA COLI DIHYDROFOLATE REDUCTASE. LIGAND-INDUCED CONFORMATIONAL CHANGES AND COOPERATIVITY IN BINDING

Coordinates

PDB Format Compare

Method

X-RAY DIFFRACTION 1.96 Å

Oligo State

homo-dimer

Ligands

2 x CL: CHLORIDE ION(Non-functional Binders)

CL.1: 5 residues within 4Å: Chain A: G.43, R.44, H.45, T.46, G.96 Ligand excluded by PLIP CL.4: 4 residues within 4Å: Chain B: G.43, H.45, T.46, G.96 Ligand excluded by PLIP

2 x MTX: METHOTREXATE(Non-covalent)

MTX.2: 15 residues within 4Å: Chain A: I.5, A.6, A.7, L.28, F.31, K.32, S.49, I.50, R.52, L.54, R.57, I.94, Y.100, T.113 Ligands: EOH.3 12 PLIP interactions: 12 interactions with chain A Hydrophobic interactions: A:L.28, A:F.31 Hydrogen bonds: A:I.5, A:R.52, A:Y.100, A:T.113, A:T.113 Water bridges: A:A.7, A:K.32 Salt bridges: A:K.32, A:R.52, A:R.57 MTX.6: 14 residues within 4Å: Chain B: I.5, A.6, A.7, L.28, F.31, K.32, I.50, R.52, L.54, R.57, I.94, Y.100, T.113 Ligands: EOH.7 13 PLIP interactions: 13 interactions with chain B Hydrophobic interactions: B:L.28, B:L.28, B:F.31 Hydrogen bonds: B:I.5, B:R.52, B:T.113, B:T.113 Water bridges: B:A.7, B:K.32, B:Y.100 Salt bridges: B:K.32, B:R.52, B:R.57

2 x EOH: ETHANOL(Non-functional Binders)

EOH.3: 5 residues within 4Å: Chain A: A.7, W.22, C.27, L.28 Ligands: MTX.2 2 PLIP interactions: 2 interactions with chain A Hydrophobic interactions: A:A.7, A:L.28 EOH.7: 4 residues within 4Å: Chain B: A.7, C.27, L.28 Ligands: MTX.6 2 PLIP interactions: 2 interactions with chain B Hydrophobic interactions: B:A.7, B:L.28

1 x CA: CALCIUM ION(Non-covalent)

CA.5: 1 residues within 4Å: Chain B: S.135 3 PLIP interactions: 1 interactions with chain B, 2 Ligand-Water interactions Metal complexes: B:S.135, H2O.11, H2O.12

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Bystroff, C. et al., Crystal structure of unliganded Escherichia coli dihydrofolate reductase. Ligand-induced conformational changes and cooperativity in binding. Biochemistry (1991)

Release Date

1994-01-31

Peptides

DIHYDROFOLATE REDUCTASE: AB

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

B
B

DIHYDROFOLATE REDUCTASE