ISDA

Entry Detail

PDB ID:

8R3B

Keywords:

SUGAR BINDING PROTEIN

Title:

Cocrystal form I of the Pent - sulfonato-calix[8]arene complex

Biological Source:

Source Organism:

Enterobacteria phage L1

Host Organism:

Escherichia coli BL21(DE3)

PDB Version:

Deposition Date:

2023-11-08

Release Date:

2024-03-06

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.66 Å

R-Value Free:

0.23

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 43 21 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Beta propeller
Mutations:N33K
Chain IDs:A, B, C (auth: E), D, E (auth: C)
Chain Length:48
Number of Molecules:5
Biological Source:Enterobacteria phage L1

UniProt ID:A0A140UHM9 Pfam ID:PF14517

Ligand Molecules

EVB

NDG

Primary Citation

Multivalent Calixarene Complexation of a Designed Pentameric Lectin.

Flood, R.J, Cerofolini, L, Fragai, M, Crowley, P.B, Smock, R.G, Yadid, I, Dym, O, Clarke, J, Tawfik, D.S.Show

Biomacromolecules 25 1303 1309 (2024)

PMID: 38227741 DOI: 10.1021/acs.biomac.3c01280

Abstact

We describe complex formation between a designed pentameric β-propeller and the anionic macrocycle sulfonato-calix[8]arene (sclx8), as characterized by X-ray crystallography and NMR spectroscopy. Two crystal structures and 15N HSQC experiments reveal a single calixarene binding site in the concave pocket of the β-propeller toroid. Despite the symmetry mismatch between the pentameric protein and the octameric macrocycle, they form a high affinity multivalent complex, with the largest protein-calixarene interface observed to date. This system provides a platform for investigating multivalency.

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Primary Citation of related structures