Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 41.29 kDa 
• Atom Count: 3078 
• Modelled Residue Count: 371 
• Deposited Residue Count: 372 
• Unique protein chains: 1

1JVX

Maltodextrin-binding protein variant D207C/A301GS/P316C cross-linked in crystal

• PDB DOI: 10.2210/pdb1JVX/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2001-08-31 Released: 2001-09-12 
• Deposition Author(s): Srinivasan, U., Iyer, G.H., Przybycien, T.A., Samsonoff, W.A., Bell, J.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.304 
• R-Value Work: 0.232 
• R-Value Observed: 0.239 

Literature

Crystine: Fibrous Biomolecular Material from Protein Crystals Cross-linked in a Specific Geometry

Srinivasan, U., Iyer, G.H., Przybycien, T.A., Samsonoff, W.A., Bell, J.A.

(2002) Protein Eng 15: 895-902

• PubMed: 12538909 
• DOI: 10.1093/protein/15.11.895
• Primary Citation of Related Structures:  
  1JVX, 1JVY


• PubMed Abstract: 
  

Cysteine substitutions were engineered on the surface of maltose binding protein to produce crystine fibers, linear polymers of folded protein formed within a crystal. Disulfide bond formation between adjacent protein molecules within the lattice was monitored by X-ray crystallography. The cross-linked crystals were resistant to dissolution in water or neutral buffer solutions, even though the cross-linking was one-dimensional. However, crystine fibers were observed by transmission electron microscopy to dissociate from the crystals in acidic solutions. Some fibers remained associated as two-dimensional bundles or sheets, with a repeat unit along the fibers consistent with the packing of the individual protein molecules in the crystal. Neutralization of the acidic solutions caused the fibers to re-associate as a solid. Crystine threads were drawn out of this solution. In scanning electron microscopy images, many individual fibers could be seen unwinding from the ends of some threads. Crystine fibers are a new type of biomolecular material with potential applications wherever the use of proteins in a fibrous form is desirable, for example, the incorporation of enzymes into cloth or filtration material.

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Organizational Affiliation: 

Department of Chemistry, Rensselaer Polytechnic Institute, Troy, NY 12180, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
maltodextrin-binding protein	A	372	Escherichia coli	Mutation(s): 2  Gene Names: malE
UniProt
Find proteins for P0AEX9 (Escherichia coli (strain K12)) Explore P0AEX9  Go to UniProtKB:  P0AEX9

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose	B	2		N/A
Glycosylation Resources
GlyTouCan:  G07411ON GlyCosmos:  G07411ON

Biologically Interesting Molecules (External Reference) 1 Unique

Entity ID: 2
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_900001	B	alpha-maltose	Oligosaccharide / Nutrient		Ligand Interaction

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.304 
• R-Value Work: 0.232 
• R-Value Observed: 0.239 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 103.61	α = 90
b = 67.58	β = 113.31
c = 57.27	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
CNS	refinement
CNX	refinement
CCP4	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-08-31 
• Released Date: 2001-09-12 
Deposition Author(s): Srinivasan, U., Iyer, G.H., Przybycien, T.A., Samsonoff, W.A., Bell, J.A.

Revision History  

• Version 1.0: 2001-09-12
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary
• Version 2.1: 2021-10-27
  Changes: Database references, Structure summary