Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 19664.16 
• Atom Count: 1372 
• Residue Count: 166 
• Unique protein chains: 1

2CL7

CRYSTAL STRUCTURE ANALYSIS OF A FLUORESCENT FORM OF H-RAS P21 IN COMPLEX WITH GTP

• DOI: 10.2210/pdb2CL7/pdb

• Classification: NUCLEOTIDE-BINDING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): 2 


• Deposited: 2006-04-26 Released: 2006-05-24 
• Deposition Author(s): Klink, B.U., Goody, R.S., Scheidig, A.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.25 Å
• R-Value Free: 0.170 
• R-Value Work: 0.148 

Literature

A Newly Designed Microspectrofluorometer for Kinetic Studies on Protein Crystals in Combination with X-Ray Diffraction.

Klink, B.U., Goody, R.S., Scheidig, A.J.

(2006) Biophys.J. 91: 981

• PubMed: 16698776 
• DOI: 10.1529/biophysj.105.078931
• Primary Citation of Related Structures:  
  2CLD, 2CLC, 2CL6, 2CE2, 2EVW, 2CL0


• PubMed Abstract: 
  

We present a new design for a fluorescence microspectrophotometer for use in kinetic crystallography in combination with x-ray diffraction experiments. The FLUMIX device (Fluorescence spectroscopy to monitor intermediates in x-ray crystallography) is built for 0 degrees fluorescence detection, which has several advantages in comparison to a conventional fluorometer with 90 degrees design. Due to the reduced spatial requirements and the need for only one objective, the system is highly versatile, easy to handle, and can be used for many different applications. In combination with a conventional stereomicroscope, fluorescence measurements or reaction initiation can be performed directly in a hanging drop crystallization setup. The FLUMIX device can be combined with most x-ray sources, normally without the need of a specialized mechanical support. As a biological model system, we have used H-Ras p21 with an artificially introduced photo-labile GTP precursor (caged GTP) and a covalently attached fluorophore (IANBD amide). Using the FLUMIX system, detailed information about the state of photolyzed crystals of the modified H-Ras p21 (p21(mod)) could be obtained. Measurements in combination with a synchrotron beamline showed significant fluorescence changes in p21(mod) crystals even within a few seconds of x-ray exposure at 100 K.

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Organizational Affiliation: 

Max-Planck-Institut für Molekulare Physiologie, Abteilung Physikalische Biochemie, D-44225 Dortmund, Germany.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
GTPASE HRAS	X	166	Homo sapiens	Mutation(s): 2  Gene Names: HRAS (HRAS1)
Find proteins for P01112 (Homo sapiens) Go to Gene View: HRAS Go to UniProtKB:  P01112

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
GTP	X	GUANOSINE-5'-TRIPHOSPHATE C10 H16 N5 O14 P3 XKMLYUALXHKNFT-UUOKFMHZSA-N
XY2	X	N,N'-DIMETHYL-N-(ACETYL)-N'-(7-NITROBENZ-2-OXA-1,3-DIAZOL-4-YL)ETHYLENEDIAMINE C12 H15 N5 O4 YSVJZZZGPPWEIC-UHFFFAOYSA-N
MG	X	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.25 Å
• R-Value Free: 0.170 
• R-Value Work: 0.148 
• Space Group: P 4₁

Unit Cell:

Length (Å)	Angle (°)
a = 69.280	α = 90.00
b = 69.280	β = 90.00
c = 35.020	γ = 90.00

Software Package:

Software Name	Purpose
MOLREP	phasing
XDS	data reduction
REFMAC	refinement
XSCALE	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-04-26 
• Released Date: 2006-05-24 
• Deposition Author(s): Klink, B.U., Goody, R.S., Scheidig, A.J.

Revision History 

• Version 1.0: 2006-05-24
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Advisory, Version format compliance
• Version 1.2: 2015-04-22
  Type: Atomic model, Derived calculations, Non-polymer description, Other, Refinement description
• Version 1.3: 2019-01-30
  Type: Data collection, Experimental preparation, Other
• Version 1.4: 2019-02-06
  Type: Data collection, Experimental preparation