1WUA

The structure of Aplyronine A-actin complex

• PDB DOI:  https://doi.org/10.2210/pdb1WUA/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Oryctolagus cuniculus
• Mutation(s): Yes 


• Deposited: 2004-12-03 Released: 2006-02-14 
• Deposition Author(s): Hirata, K., Muraoka, S., Suenaga, K., Kuroda, T., Kato, K., Tanaka, H., Yamamoto, M., Takata, M., Yamada, K., Kigoshi, H.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.176 
• R-Value Work: 0.151 
• R-Value Observed: 0.153 

Literature

Structure basis for antitumor effect of aplyronine a

Hirata, K., Muraoka, S., Suenaga, K., Kuroda, T., Kato, K., Tanaka, H., Yamamoto, M., Takata, M., Yamada, K., Kigoshi, H.

(2006) J Mol Biol 356: 945-954

• PubMed: 16406066 
• DOI: https://doi.org/10.1016/j.jmb.2005.12.031
• Primary Citation of Related Structures:  
  1WUA


• PubMed Abstract: 
  

Aplyronine A, isolated from the sea hare Aplysia kurodai, possesses an exceedingly potent antitumor effect in vivo and it is one of the promising candidates as an anticancer drug. This macrolide is known to depolymerize F-actin and inhibit the polymerization of actin by forming a 1:1 complex with monomeric actin. The first complex structure of actin-aplyronine A was determined via a synchrotron X-ray analysis at a 1.45 A resolution. As expected, aplyronine A binds to a hydrophobic cleft composed of subdomains 1 and 3 of actin by intercalating its aliphatic tail part into the actin molecule as do the other reported F-actin depolymerizing agents. Unexpectedly, this complex structure shows the specific structural features around the trimethylserine moiety, revealed as an important moiety of aplyronine A for cytotoxicity against HeLa cells. Combining this result and our previous one, the moiety should strongly relate to the specific biological activity of aplyronine A; i.e. a potent antitumor effect.

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Organizational Affiliation: 

JASRI/SPring-8, 1-1-1 Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5198 Japan.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 43.5 kDa 
• Atom Count: 3,716 
• Modelled Residue Count: 358 
• Deposited Residue Count: 375 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Actin, alpha skeletal muscle	A	375	Oryctolagus cuniculus	Mutation(s): 1  Gene Names: ACTA1, ACTA
UniProt
Find proteins for P68135 (Oryctolagus cuniculus) Explore P68135  Go to UniProtKB:  P68135

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
AP8	D [auth A]	(8R,9R,10R,11R,14S,18S,20S,24S)-24-{(1R,2S,3R,6R,7R,8R,9S,10E)-8-(ACETYLOXY)-6-[(N,N-DIMETHYLALANYL)OXY]-11-[FORMYL(MET HYL)AMINO]-2-HYDROXY-1,3,7,9-TETRAMETHYLUNDEC-10-ENYL}-10-HYDROXY-14,20-DIMETHOXY-9,11,15,18-TETRAMETHYL-2-OXOOXACYCLOTE TRACOSA-3,5,15,21-TETRAEN-8-YL N,N,O-TRIMETHYLSERINATE C59 H101 N3 O14 JMXMEKJLQWJRHY-GDEZZODWSA-N
ATP	C [auth A]	ADENOSINE-5'-TRIPHOSPHATE C10 H16 N5 O13 P3 ZKHQWZAMYRWXGA-KQYNXXCUSA-N
CA	B [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
HIC	A	L-PEPTIDE LINKING	C7 H11 N3 O2		HIS

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.176 
• R-Value Work: 0.151 
• R-Value Observed: 0.153 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 39.704	α = 90
b = 75.123	β = 95.23
c = 67.546	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
CCP4	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2006-02-14 
Deposition Author(s): Hirata, K., Muraoka, S., Suenaga, K., Kuroda, T., Kato, K., Tanaka, H., Yamamoto, M., Takata, M., Yamada, K., Kigoshi, H.

Revision History  

• Version 1.0: 2006-02-14
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance