SMTL ID : 5ffr.1

Crystal Structure of Surfactant Protein-A complexed with phosphocholine

Coordinates

PDB Format

Method

X-RAY DIFFRACTION 2.20 Å

Oligo State

homo-trimer

Ligands

3 x CA: CALCIUM ION(Non-covalent)

CA.1: 4 residues within 4Å: Chain A: E.115, E.122, N.134, D.135 5 PLIP interactions: 3 interactions with chain A, 2 Ligand-Water interactions Metal complexes: A:E.115, A:E.122, A:D.135, H2O.1, H2O.2 CA.4: 4 residues within 4Å: Chain B: E.115, E.122, N.134, D.135 5 PLIP interactions: 3 interactions with chain B, 2 Ligand-Water interactions Metal complexes: B:E.115, B:E.122, B:D.135, H2O.5, H2O.5 CA.7: 4 residues within 4Å: Chain C: E.115, E.122, N.134, D.135 5 PLIP interactions: 3 interactions with chain C, 2 Ligand-Water interactions Metal complexes: C:E.115, C:E.122, C:D.135, H2O.9, H2O.9

3 x PC: PHOSPHOCHOLINE(Non-covalent)

PC.2: 5 residues within 4Å: Chain A: N.83, Y.84, R.136, Q.140, R.142 5 PLIP interactions: 5 interactions with chain A Hydrogen bonds: A:Q.140 Water bridges: A:R.142 Salt bridges: A:R.136, A:R.142 pi-Cation interactions: A:Y.84 PC.5: 5 residues within 4Å: Chain B: N.83, Y.84, R.136, Q.140, R.142 5 PLIP interactions: 5 interactions with chain B Hydrogen bonds: B:Q.140 Water bridges: B:R.142 Salt bridges: B:R.136, B:R.142 pi-Cation interactions: B:Y.84 PC.8: 5 residues within 4Å: Chain C: N.83, Y.84, R.136, Q.140, R.142 5 PLIP interactions: 5 interactions with chain C Hydrogen bonds: C:Q.140 Water bridges: C:R.142 Salt bridges: C:R.136, C:R.142 pi-Cation interactions: C:Y.84

3 x NA: SODIUM ION(Non-functional Binders)

NA.3: 7 residues within 4Å: Chain A: E.91, G.118, Q.119, G.120, K.121, E.122, D.135 4 PLIP interactions: 4 interactions with chain A Hydrogen bonds: A:E.91, A:G.120, A:E.122 Water bridges: A:G.96 NA.6: 7 residues within 4Å: Chain B: E.91, G.118, Q.119, G.120, K.121, E.122, D.135 4 PLIP interactions: 4 interactions with chain B Hydrogen bonds: B:G.120, B:E.122, B:D.135 Water bridges: B:G.96 NA.9: 7 residues within 4Å: Chain C: E.91, G.118, Q.119, G.120, K.121, E.122, D.135 4 PLIP interactions: 4 interactions with chain C Hydrogen bonds: C:G.120, C:E.122, C:D.135 Water bridges: C:G.96

Links

RCSB   PDBe   PDBe-KB   PDBj   PDBsum   CATH   PLIP

Citation

Goh, B.C. et al., Elucidation of Lipid Binding Sites on Lung Surfactant Protein A Using X-ray Crystallography, Mutagenesis, and Molecular Dynamics Simulations. Biochemistry (2016)

Release Date

2016-07-06

Peptides

Pulmonary surfactant-associated protein A: ABC

SMTL:PDB

SMTL Chain Id:
PDB Chain Id:

A
A

B
A

C
A

Pulmonary surfactant-associated protein A

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