6GD6

Cytochrome c in complex with Sulfonato-calix[8]arene, H3 form with ammonium sulfate

PDB DOI: https://doi.org/10.2210/pdb6GD6/pdb

Classification: OXIDOREDUCTASE
Organism(s): Saccharomyces cerevisiae S288C
Expression System: Escherichia coli BL21(DE3)
Mutation(s): Yes

Deposited: 2018-04-23 Released: 2018-08-29
Deposition Author(s): Rennie, M.L., Fox, G.C., Crowley, P.B.
Funding Organization(s): Science Foundation Ireland

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 1.20 Å
R-Value Free: 0.136
R-Value Work: 0.119
R-Value Observed: 0.120

Starting Model: experimental
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wwPDB Validation 3D Report Full Report

Ligand Structure Quality Assessment

This is version 1.3 of the entry. See complete history.

Literature

Auto-regulated Protein Assembly on a Supramolecular Scaffold.

Rennie, M.L., Fox, G.C., Perez, J., Crowley, P.B.

(2018) Angew Chem Int Ed Engl 57: 13764-13769

PubMed: 30109907 Search on PubMed
DOI: https://doi.org/10.1002/anie.201807490
Primary Citation of Related Structures:
6GD6, 6GD7, 6GD8, 6GD9

PubMed Abstract:
Controlled protein assembly provides a means to regulate function. Supramolecular building blocks, including rigid macrocycles, are versatile triggers of protein assembly. Now it is shown that sulfonato-calix[8]arene (sclx ₈ ) mediates the formation of cytochrome c tetramers in solution. This tetramer spontaneously disassembles at ≥2 equivalents of sclx ₈ , providing a remarkable example of auto-regulation. Using X-ray crystallography the sclx ₈ binding sites on cytochrome c were characterized. Crystal structures at different protein-ligand ratios reveal varying degrees (up to 35 %) of protein surface coverage by the flexible calixarene and suggest a mechanism for oligomer disassembly. The solution structure of the oligomer was characterized by small-angle X-ray scattering. Overall, the data indicate calixarene-controlled protein assembly and disassembly without the requirement for a competitive inhibitor, and point to protein encapsulation by a flexible macrocycle.

Organizational Affiliation

School of Chemistry, National University of Ireland Galway, University Road, Galway, Ireland.

Macromolecule Content

Total Structure Weight: 14.63 kDa
Atom Count: 1,417
Modelled Residue Count: 108
Deposited Residue Count: 108
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cytochrome c iso-1	A	108	Saccharomyces cerevisiae S288C	Mutation(s): 1 Gene Names: CYC1, YJR048W, J1653
UniProt
Find proteins for P00044 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c)) Explore P00044 Go to UniProtKB: P00044
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	P00044
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
EVB (Subject of Investigation/LOI) Query on EVB Download Ideal Coordinates CCD File SDF format, chain C [auth A] MOL2 format, chain C [auth A] mmCIF format, chain C [auth A]	C [auth A]	sulfonato-calix[8]arene C₅₆ H₄₈ O₃₂ S₈ KCEGJGDGMRAJEP-UHFFFAOYSA-N		Interactions Focus chain C [auth A] Interactions & Density Focus chain C [auth A]
HEC Query on HEC Download Ideal Coordinates CCD File SDF format, chain B [auth A] MOL2 format, chain B [auth A] mmCIF format, chain B [auth A]	B [auth A]	HEME C C₃₄ H₃₄ Fe N₄ O₄ HXQIYSLZKNYNMH-LJNAALQVSA-N		Interactions Focus chain B [auth A] Interactions & Density Focus chain B [auth A]
SO4 Query on SO4 Download Ideal Coordinates CCD File SDF format, chain D [auth A] SDF format, chain E [auth A] SDF format, chain F [auth A] SDF format, chain G [auth A] SDF format, chain H [auth A] MOL2 format, chain D [auth A] MOL2 format, chain E [auth A] MOL2 format, chain F [auth A] MOL2 format, chain G [auth A] MOL2 format, chain H [auth A] mmCIF format, chain D [auth A] mmCIF format, chain E [auth A] mmCIF format, chain F [auth A] mmCIF format, chain G [auth A] mmCIF format, chain H [auth A]	D [auth A], E [auth A], F [auth A], G [auth A], H [auth A]	SULFATE ION O₄ S QAOWNCQODCNURD-UHFFFAOYSA-L		Interactions Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A] Interactions & Density Focus chain D [auth A] Focus chain E [auth A] Focus chain F [auth A] Focus chain G [auth A] Focus chain H [auth A]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 1.20 Å
R-Value Free: 0.136
R-Value Work: 0.119
R-Value Observed: 0.120
Space Group: H 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 82.003	α = 90
b = 82.003	β = 90
c = 82.535	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
Aimless	data scaling
PHASER	phasing
PDB_EXTRACT	data extraction

Structure Validation

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Ligand Structure Quality Assessment

Entry History & Funding Information

Deposition Data

Released Date: 2018-08-29

Deposition Author(s):

Rennie, M.L.

Fox, G.C.

Crowley, P.B.

Funding Organization	Location	Grant Number
Science Foundation Ireland	Ireland	13/ERC/B2912 and 13/CDA/2168

Revision History (Full details and data files)

Version 1.0: 2018-08-29
Type: Initial release
Version 1.1: 2018-10-17
Changes: Data collection, Database references
Version 1.2: 2024-01-17
Changes: Data collection, Database references, Refinement description
Version 1.3: 2024-10-16
Changes: Structure summary