Targeting LRRK2 for Parkinson's Disease with the Transcreener® GDP GTPase Assay

Transcreener GDP Assay - TR-FRET Readout

The Transcreener® GDP Assay with TR-FRET readout uses displacement of a tracer by GDP to measure enzymatic activity. This disrupts FRET from the antibody-bound Terbium chelate leading to a decrease in the TR-FRET signal. In addition to the time-resolved signal, the assay uses a far-red tracer to minimize interference from fluorescent compounds and light scattering. 

The assay produces an excellent signal at low substrate conversion for a broad range of initial GTP concentrations (0.1-1,000 µM). Both reagents & signal are stable at room temperature for over 24 hours, providing outstanding flexibility for automated high-volume screening programs. The universal detection method allows screening of virtually any GTPase in a high throughput format. 

Used in over millions of well by pharma since 2006, Transcreener is the most extensively validated GDP detection method available backed by the best technical support in the industry. 

Direct Detection of GDP to Measure GTPase Enzymatic Activity

Time-Resolved Förster Resonance Energy Transfer (TR-FRET)

GDP Assay Kit - TR-FRET Readout

Applications

  • Measure enzymatic activity of GTPases
  • Screen compound libraries for GTPase modulators
  • Quantify inhibitor potency
  • Inhibitor selectivity profiling
  • Measure drug-target residence time

Features

  • Direct detection of unlabeled GDP
  • Robust Assay Z' > 0.7 under initial velocity conditions
  • Far-red fluorescent readouts minimize compound interference
  • A safe, non-radioactive method
  • Use with GTP concentrations from 0.1 to 1000 µM
  • Universal - use with virtually any GTPase

Easy-to-Use, Mix-&-Read, HTS Ready

Run your enzyme reaction, add Transcreener reagents, and read your plates. The GDP assay is compatible with 96, 384, and 1536-well formats. 

Mix-and-Read-GAP-Assay

Example Applications

GTPase FamilyEnzyme
Ras FamilyKRAS
HRAS
NRAS
RRAS
Rho FamilyRhoA
RhoC
Cdc42
Rac1
Ran FamilyRan

Far Red TR-FRET Readouts Validated on Major Multimode Readers

SupplierInstrumentTR-FRET Assays
TriStar2S LB 942Click Me ArrowValidated
Mithras2 LB 943Click Me ArrowValidated
CytationTM 5Validated
CytationTM 3Validated
CytationTM 1Validated
SynergyTM H1Validated
SynergyTM 2/H4/4Click Me ArrowValidated
SynergyTM HTXNot Capable
SynergyTM Neo 2Validated
POLARstar® OmegaClick Me ArrowValidated
FLUOstar® OmegaClick Me ArrowValidated
PHERAstar® FSXClick Me ArrowValidated
PHERAstar® Plus/FSClick Me ArrowValidated
CLARIOstar® /PlusClick Me ArrowValidated
VANTAstarTMClick Me ArrowValidated
SenseIn Review
Analyst® GT/HTClick Me ArrowValidated
Gemini® XPS/EMNot Capable
SpectraMax® M2/M2eNot Capable
SpectraMax® M5/M5e/FlexStation® 3Click Me ArrowValidated
SpectraMax® ParadigmClick Me ArrowContact Us
SpectraMax® iD3/iD5Click Me ArrowValidated
EnVision®/EnVision® XciteClick Me ArrowValidated
Infinite® M1000/M1000Pro/Safire2TMClick Me ArrowValidated
Infinite® M200Not Capable
Infinite® F500Click Me ArrowValidated
Infinite® F200/UltraevolutionClick Me ArrowContact Us
SparkTM 10MClick Me ArrowValidated

Validation Criteria for Plate Readers

  • 384-Well Format
  • Z'-Factor ≥ 0.7 at 10% conversion of 10 μM ATP
  • Z' specifications to be met using Transcreener ADP2 Assay Reagents
  • Read time to achieve Z' specifications ≤ 5 minutes

Look for these stickers on instruments that have successfully met the validation criteria. 

The instrument validation program is a collaborative effort with the major suppliers of multimode readers to insure that Transcreener assays perform optimally on your specific instrument. Scientists at BellBrook and/or the instrument vendor have tested Transcreener reagents with each instrument to determine optimal filters and settings for maximal assay performance. We provide you with application notes with all the important details, so you can be confident of success using Transcreener assays on the instrument of your choice. 

Transcreener Instrument Validation

What's Included

What You Will Need

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