6MGH

X-ray structure of monomeric near-infrared fluorescent protein miRFP670nano


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Smallest near-infrared fluorescent protein evolved from cyanobacteriochrome as versatile tag for spectral multiplexing.

Oliinyk, O.S.Shemetov, A.A.Pletnev, S.Shcherbakova, D.M.Verkhusha, V.V.

(2019) Nat Commun 10: 279-279

  • DOI: 10.1038/s41467-018-08050-8

  • PubMed Abstract: 
  • From a single domain of cyanobacteriochrome (CBCR) we developed a near-infrared (NIR) fluorescent protein (FP), termed miRFP670nano, with excitation at 645 nm and emission at 670 nm. This is the first CBCR-derived NIR FP evolved to efficiently bind e ...

    From a single domain of cyanobacteriochrome (CBCR) we developed a near-infrared (NIR) fluorescent protein (FP), termed miRFP670nano, with excitation at 645 nm and emission at 670 nm. This is the first CBCR-derived NIR FP evolved to efficiently bind endogenous biliverdin chromophore and brightly fluoresce in mammalian cells. miRFP670nano is a monomer with molecular weight of 17 kDa that is 2-fold smaller than bacterial phytochrome (BphP)-based NIR FPs and 1.6-fold smaller than GFP-like FPs. Crystal structure of the CBCR-based NIR FP with biliverdin reveals a molecular basis of its spectral and biochemical properties. Unlike BphP-derived NIR FPs, miRFP670nano is highly stable to denaturation and degradation and can be used as an internal protein tag. miRFP670nano is an effective FRET donor for red-shifted NIR FPs, enabling engineering NIR FRET biosensors spectrally compatible with GFP-like FPs and blue-green optogenetic tools. miRFP670nano unlocks a new source of diverse CBCR templates for NIR FPs.


    Organizational Affiliation

    Medicum, Faculty of Medicine, University of Helsinki, 00290, Helsinki, Finland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
miRFP670nano
A, B, C, D, E, F, G, H
163N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
B, C, G, H
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
IPA
Query on IPA

Download SDF File 
Download CCD File 
B, C
ISOPROPYL ALCOHOL
2-PROPANOL
C3 H8 O
KFZMGEQAYNKOFK-UHFFFAOYSA-N
 Ligand Interaction
JRA
Query on JRA

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H
3-[2-[(~{Z})-[5-[(~{Z})-[(3~{S},4~{R})-3-ethenyl-4-methyl-5-oxidanylidene-pyrrolidin-2-ylidene]methyl]-3-(3-hydroxy-3-oxopropyl)-4-methyl-pyrrol-2-ylidene]methyl]-5-[(~{Z})-(4-ethenyl-3-methyl-5-oxidanylidene-pyrrol-2-ylidene)methyl]-4-methyl-1~{H}-pyrrol-3-yl]propanoic acid
C33 H36 N4 O6
WLDQKQLRZDEERT-YTUMONHESA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.182 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 187.598α = 90.00
b = 72.124β = 129.99
c = 136.698γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
MOLREPphasing
SCALEPACKdata scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2018-09-13 
  • Released Date: 2018-12-19 
  • Deposition Author(s): Pletnev, S.

Revision History 

  • Version 1.0: 2018-12-19
    Type: Initial release
  • Version 1.1: 2019-01-30
    Type: Data collection, Database references