1EQY

COMPLEX BETWEEN RABBIT MUSCLE ALPHA-ACTIN: HUMAN GELSOLIN DOMAIN 1

• PDB DOI:  https://doi.org/10.2210/pdb1EQY/pdb

• Classification: CONTRACTILE PROTEIN
• Organism(s): Homo sapiens, Oryctolagus cuniculus
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2000-04-06 Released: 2000-05-03 
• Deposition Author(s): McLaughlin, P.J., Gooch, J.T., Mannherz, H.G., Weeds, A.G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.280 
• R-Value Work: 0.174 
• R-Value Observed: 0.174 

Literature

Structure of gelsolin segment 1-actin complex and the mechanism of filament severing.

McLaughlin, P.J., Gooch, J.T., Mannherz, H.G., Weeds, A.G.

(1993) Nature 364: 685-692

• PubMed: 8395021 
• DOI: https://doi.org/10.1038/364685a0
• Primary Citation of Related Structures:  
  1EQY


• PubMed Abstract: 
  

The structure of the segment 1 domain of gelsolin, a protein that fragments actin filaments in cells, is reported in complex with actin. Segment 1 binds monomer using an apolar patch rimmed by hydrogen bonds in a cleft between actin domains. On the actin filament model it binds tangentially, disrupting only those contacts between adjacent subunits in one helical strand. The segment 1 fold is general for all segments of the gelsolin family because the conserved residues form the core of the structure. It also provides a basis for understanding the origin of an amyloidosis caused by a gelsolin variant.

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Organizational Affiliation: 

MRC Laboratory of Molecular Biology, Cambridge, UK.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Macromolecule Content

• Total Structure Weight: 56.8 kDa 
• Atom Count: 4,486 
• Modelled Residue Count: 485 
• Deposited Residue Count: 502 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GELSOLIN	A [auth S]	125	Homo sapiens	Mutation(s): 1  Gene Names: GSN
UniProt & NIH Common Fund Data Resources
Find proteins for P06396 (Homo sapiens) Explore P06396  Go to UniProtKB:  P06396
PHAROS:  P06396

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
ALPHA ACTIN	B [auth A]	377	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 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ATP	F [auth A]	ADENOSINE-5'-TRIPHOSPHATE C10 H16 N5 O13 P3 ZKHQWZAMYRWXGA-KQYNXXCUSA-N
CA	C [auth S], D [auth S], E [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.280 
• R-Value Work: 0.174 
• R-Value Observed: 0.174 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 57.33	α = 90
b = 70.88	β = 90
c = 183.58	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
SHELXL-97	refinement
MOSFLM	data reduction
CCP4	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-05-03 
Deposition Author(s): McLaughlin, P.J., Gooch, J.T., Mannherz, H.G., Weeds, A.G.

Revision History  

• Version 1.0: 2000-05-03
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2021-11-03
  Changes: Data collection, Database references, Derived calculations