2KS9

Solution conformation of substance P in water complexed with NK1R


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

NMR evidence of GM1-induced conformational change of Substance P using isotropic bicelles

Gayen, A.Goswami, S.K.Mukhopadhyay, C.

(2010) Biochim.Biophys.Acta --: --

  • DOI: 10.1016/j.bbamem.2010.09.023
  • Primary Citation of Related Structures:  2KSA, 2KSB

  • PubMed Abstract: 
  • Substance P (SP) is one of the target neurotransmitters associated with diseases related to chronic inflammation, pain and depression. The selective receptor for SP, NK(1)R is located in the heterogeneous microdomains or caveolae in membrane. Ganglio ...

    Substance P (SP) is one of the target neurotransmitters associated with diseases related to chronic inflammation, pain and depression. The selective receptor for SP, NK(1)R is located in the heterogeneous microdomains or caveolae in membrane. Gangliosides, specifically GM1, are markers of these heterogeneous sites. Also, gangliosides are considered as important regulatory elements in cell-cell recognition and cell signaling. In the present work, we describe the conformations of Substance P in the presence of ternary membrane systems containing GM1 at the physiological concentration. SP is mostly unstructured in water, but appears as extended 3(10) helical or turn III in isotropic bicelles, more pronounced in the presence of GM1. NMR results suggest that, in the GM1 containing bicelles, the peptide is more inserted into the membrane with its C-terminus, while N-terminus lies close to the membrane-water interface. The NMR-derived conformation of SP in GM1 bicelles is docked on homology modeled NK(1)R and resulting interactions satisfy reported mutagenesis, fluorescence, photo-affinity labeling and modeling data. The results highlight efficacy of GM1 in membrane in providing structure in an otherwise flexible neurotransmitter Substance P; thus providing indication that it may be useful also for other neurotransmitter peptides/proteins associated with membrane.


    Organizational Affiliation

    Department of Chemistry, University of Calcutta, 92 APC Road, Kolkata 700009, India.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Substance-P receptor
A
364Homo sapiensGene Names: TACR1 (NK1R, TAC1R)
Find proteins for P25103 (Homo sapiens)
Go to Gene View: TACR1
Go to UniProtKB:  P25103
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Substance P
B
11Homo sapiensGene Names: TAC1 (NKA, NKNA, TAC2)
Find proteins for P20366 (Homo sapiens)
Go to Gene View: TAC1
Go to UniProtKB:  P20366
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 20 
  • Conformers Submitted: 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2KS9 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance