Biological Assembly 1  

 3D View: Structure | Electron Density

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

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

Biological Assembly 2  

 3D View: Structure | Electron Density

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 51.40 kDa 
• Atom Count: 3038 
• Residue Count: 376 
• Unique protein chains: 1

3F57

Crystal structure of human erythroid beta spectrin repeats 14 and 15 (ankyrin binding domain)

• DOI: 10.2210/pdb3F57/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2008-11-03 Released: 2009-02-24 
• Deposition Author(s): Ipsaro, J.J., Mondragon, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Free: 0.322 
• R-Value Work: 0.262 
• R-Value Observed: 0.265 

Literature

Structures of the spectrin-ankyrin interaction binding domains.

Ipsaro, J.J., Huang, L., Mondragon, A.

(2009) Blood 113: 5385-5393

• PubMed: 19141864 
• DOI: 10.1182/blood-2008-10-184358
• Primary Citation of Related Structures:  
  3F57, 3F59


• PubMed Abstract: 
  

As key components of the erythrocyte membrane skeleton, spectrin and ankyrin specifically interact to tether the spectrin cytoskeleton to the cell membrane. The structure of the spectrin binding domain of ankyrin and the ankyrin binding domain of spectrin have been solved to elucidate the structural basis for ankyrin-spectrin recognition. The structure of repeats 14 and 15 of spectrin shows that these repeats are similar to all other spectrin repeats. One feature that could account for the preference of ankyrin for these repeats is the presence of a conserved, negatively charged patch on one side of repeat 14. The structure of the ankyrin ZU5 domain shows a novel structure containing a beta core. The structure reveals that the canonical ZU5 consensus sequence is likely to be missing an important region that codes for a beta strand that forms part of the core of the domain. In addition, a positively charged region is suggestive of a binding surface for the negatively charged spectrin repeat 14. Previously reported mutants of ankyrin that map to this region lie mostly on the surface of the protein, although at least one is likely to be part of the core.

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Organizational Affiliation: 

Department of Biochemistry, Molecular Biology, and Cell Biology, Northwestern University, Evanston, IL 60208, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Spectrin beta chain, erythrocyte	A, B	225	Homo sapiens	Mutation(s): 0  Gene Names: SPTB, SPTB1
Find proteins for P11277 (Homo sapiens) Explore P11277  Go to UniProtKB:  P11277
NIH Common Fund Data Resources
PHAROS:  P11277 GTEx:  ENSG00000070182

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.90 Å
• R-Value Free: 0.322 
• R-Value Work: 0.262 
• R-Value Observed: 0.265 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 65.33	α = 90
b = 65.33	β = 90
c = 288.9	γ = 90

Software Package:

Software Name	Purpose
MAR345	data collection
SHARP	phasing
REFMAC	refinement
XDS	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-11-03 
• Released Date: 2009-02-24 
Deposition Author(s): Ipsaro, J.J., Mondragon, A.

Revision History 

• Version 1.0: 2009-02-24
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.2: 2017-10-25
  Changes: Refinement description