Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 76257.66 
• Atom Count: 5343 
• Residue Count: 691 
• Unique protein chains: 1

1LFH

MOLECULAR REPLACEMENT SOLUTION OF THE STRUCTURE OF APOLACTOFERRIN, A PROTEIN DISPLAYING LARGE-SCALE CONFORMATIONAL CHANGE

• DOI: 10.2210/pdb1LFH/pdb

• Classification: IRON TRANSPORT
• Organism(s): Homo sapiens


• Deposited: 1991-09-04 Released: 1993-10-31 
• Deposition Author(s): Anderson, B.F., Baker, E.N., Norris, G.E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å

Literature

Molecular replacement solution of the structure of apolactoferrin, a protein displaying large-scale conformational change.

Norris, G.E., Anderson, B.F., Baker, E.N.

(1991) Acta Crystallogr.,Sect.B 47: 998-1004

• PubMed: 1772635 


• PubMed Abstract: 
  

The crystal structure of an orthorhombic form of human apolactoferrin (ApoLf) has been determined from 2.8 A diffractometer data by molecular replacement methods. A variety of search models derived from the diferric lactoferrin structure (Fe2Lf) were used to obtain a consistent solution to the rotation function. An R-factor search gave the correct translational solution and the model was refined by rigid-body least-squares refinement (program CORELS). Only three of the four domains were located correctly by this procedure, however; the fourth was finally placed correctly by rotating it manually onto three strands of electron density which were recognized as part of its central beta-sheet. The final model, refined by restrained least-squares methods to an R factor of 0.214 for data in the resolution range 10.0 to 2.8 A, shows a large domain movement in the N-terminal half of the molecule (a 54 degree rotation of domain N2) and smaller domain movements elsewhere, when compared with Fe2Lf. A feature of the crystal structure is that although the ApoLf and Fe2Lf unit cells appear very similar, their crystal packing and molecular structures are quite different.

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Related Citations: 

• Structure of Human Lactoferrin: Crystallographic Structure Analysis and Refinement at 2.8 Angstroms Resolution
  Anderson, B.F.,Baker, H.M.,Norris, G.E.,Rice, D.W.,Baker, E.N.
  (1989) J.Mol.Biol. 209: 711
• Apolactoferrin Structure Demonstrates Ligand-Induced Conformational Change in Transferrins
  Anderson, B.F.,Baker, H.M.,Norris, G.E.,Rumball, S.V.,Baker, E.N.
  (1990) Nature 344: 784
• Structure of Human Lactoferrin at 3.2 Angstroms Resolution
  Anderson, B.F.,Baker, H.M.,Dodson, E.J.,Norris, G.E.,Rumball, S.V.,Waters, J.M.,Baker, E.N.
  (1987) Proc.Natl.Acad.Sci.USA 84: 1769
• Transferrins: Insights Into Structure and Function from Studies on Lactoferrin
  Baker, E.N.,Rumball, S.V.,Anderson, B.F.
  (1987) Trends Biochem.Sci.(Pers. Ed.) 12: 350




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Organizational Affiliation: 

Department of Chemistry and Biochemistry, Massey University, Palmerston North, New Zealand.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
LACTOFERRIN	A	691	Homo sapiens	Mutation(s): 0  Gene Names: LTF (GIG12, LF) EC: 3.4.21.-
Find proteins for P02788 (Homo sapiens) Go to Gene View: LTF Go to UniProtKB:  P02788

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
CL	A	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 152.090	α = 90.00
b = 94.580	β = 90.00
c = 55.790	γ = 90.00

Software Package:

Software Name	Purpose
TNT	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1991-09-04 
• Released Date: 1993-10-31 
• Deposition Author(s): Anderson, B.F., Baker, E.N., Norris, G.E.

Revision History 

• Version 1.0: 1993-10-31
  Type: Initial release
• Version 1.1: 2008-03-03
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-11-29
  Type: Derived calculations, Other