Macromolecule Content

• Total Structure Weight: 4165.54 
• Atom Count: 295 
• Residue Count: 37 
• Unique protein chains: 1

1TZ4

[hPP19-23]-pNPY bound to DPC Micelles

• DOI: 10.2210/pdb1TZ4/pdb

• Classification: NEUROPEPTIDE
• Organism(s): Homo sapiens, Sus scrofa
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2004-07-09 Released: 2005-07-05 
• Deposition Author(s): Lerch, M., Kamimori, H., Folkers, G., Aguilar, M.I., Beck-Sickinger, A.G., Zerbe, O.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with acceptable covalent geometry, structures with favorable non-bond energy, structures with the lowest energy 

Literature

Strongly Altered Receptor Binding Properties in PP and NPY Chimeras Are Accompanied by Changes in Structure and Membrane Binding

Lerch, M., Kamimori, H., Folkers, G., Aguilar, M.I., Beck-Sickinger, A.G., Zerbe, O.

(2005) Biochemistry 44: 9255-9264

• PubMed: 15966750 
• DOI: 10.1021/bi0501232
• Primary Citation of Related Structures:  
  1TZ5


• PubMed Abstract: 
  

Neuropeptide Y (NPY) and the pancreatic polypeptide (PP) are members of the neuropeptide Y family of hormones. They bind to the Y receptors with very different affinities: Whereas PP is highly selective for the Y(4) receptor, NPY displays highest affinites for Y(1), Y(2), and Y(5) receptor subtypes. Introducing the NPY segment 19-23 into PP leads to an increase in affinity at the Y(1) and Y(2) receptor subtypes whereas the exchange of this segment from PP into NPY leads to a large decrease in affinity at all receptor subtypes. PP displays a very stable structure in solution, with the N terminus being back-folded onto the C-terminal alpha-helix (the so-called PP-fold). The helix of NPY is less stable and the N terminus is freely diffusing in solution. The exchange of this segment, however, does not alter the PP-fold propensities of the chimeric peptides in solution. The structures of the phospholipid micelle-bound peptides serving to mimic the membrane-bound species display segregation into a more flexible N-terminal region and a well-defined alpha-helical region. The introduction of the [19-23]-pNPY segment into hPP leads to an N-terminal extension of the alpha-helix, now starting at Pro(14) instead of Met(17). In contrast, a truncated helix is observed in [(19)(-)(23)hPP]-pNPY, starting at Leu(17) instead of Ala(14). All peptides display moderate binding affinities to neutral membranes (K(assoc) in the range of 1.7 to 6.8 x 10(4) mol(-)(1) as determined by surface plasmon resonance) with the differences in binding being most probably related to the exchange of Arg-19 (pNPY) by Glu-23 (hPP). Differences in receptor binding properties between the chimeras and their parental peptides are therefore most likely due to changes in the conformation of the micelle-bound peptides.

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Organizational Affiliation: 

Institute of Pharmaceutical Sciences, ETH Zurich, Switzerland. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Chimera of Neuropeptide Y and Pancreatic hormone	A	37	Homo sapiens, Sus scrofa This entity is chimeric	Mutation(s): 0  Gene Names: PPY (PNP), NPY
Find proteins for P01298 (Homo sapiens) Go to Gene View: PPY Go to UniProtKB:  P01298
Find proteins for P01304 (Sus scrofa) Go to Gene View: NPY Go to UniProtKB:  P01304

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
NH2	A	NON-POLYMER	H2 N		--

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with acceptable covalent geometry, structures with favorable non-bond energy, structures with the lowest energy 
• Olderado: 1TZ4 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-07-09 
• Released Date: 2005-07-05 
• Deposition Author(s): Lerch, M., Kamimori, H., Folkers, G., Aguilar, M.I., Beck-Sickinger, A.G., Zerbe, O.

Revision History 

• Version 1.0: 2005-07-05
  Type: Initial release
• Version 1.1: 2008-04-30
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance