3IP2

Crystal structure of red fluorescent protein Neptune at pH 7.0


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Autofluorescent proteins with excitation in the optical window for intravital imaging in mammals.

Lin, M.Z.McKeown, M.R.Ng, H.L.Aguilera, T.A.Shaner, N.C.Campbell, R.E.Adams, S.R.Gross, L.A.Ma, W.Alber, T.Tsien, R.Y.

(2009) Chem Biol 16: 1169-1179

  • DOI: 10.1016/j.chembiol.2009.10.009
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Fluorescent proteins have become valuable tools for biomedical research as protein tags, reporters of gene expression, biosensor components, and cell lineage tracers. However, applications of fluorescent proteins for deep tissue imaging in whole mamm ...

    Fluorescent proteins have become valuable tools for biomedical research as protein tags, reporters of gene expression, biosensor components, and cell lineage tracers. However, applications of fluorescent proteins for deep tissue imaging in whole mammals have been constrained by the opacity of tissues to excitation light below 600 nm, because of absorbance by hemoglobin. Fluorescent proteins that excite efficiently in the "optical window" above 600 nm are therefore highly desirable. We report here the evolution of far-red fluorescent proteins with peak excitation at 600 nm or above. The brightest one of these, Neptune, performs well in imaging deep tissues in living mice. The crystal structure of Neptune reveals a novel mechanism for red-shifting involving the acquisition of a new hydrogen bond with the acylimine region of the chromophore.


    Organizational Affiliation

    Department of Pharmacology, University of California, San Diego, La Jolla, 92093, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Neptune red fluorescent proteinA242Entacmaea quadricolorMutation(s): 0 
Find proteins for Q8ISF8 (Entacmaea quadricolor)
Explore Q8ISF8 
Go to UniProtKB:  Q8ISF8
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
NRQ
Query on NRQ
AL-PEPTIDE LINKINGC16 H17 N3 O4 SMET,TYR,GLY
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.173 
  • Space Group: P 42 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.144α = 90
b = 92.144β = 90
c = 53.216γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-12-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance