External ID: SERCaMPGLuc-p1-antagonist

Protocol: PROTOCOL TABLES
SEQUENCE No. (1, 2, 3, etc.); PARAMETER (e.g., Cells, Incubation, Reagent, etc.); VALUE and DESCRIPTION.
1; Reagent; 5 uL; 1000 SH-SY5Y cells per wells
2; Time; 5 hour; 37C, 5% CO2
3; Compound; 23 nL; Control inhibitor / compound library
4; Time; 16 hour; 37C, 5% CO2
5; Reagent; 100 nM; Thapsigargin
6; Time; 4 hour; 37C, 5% CO2
7; Reagent; 1 uL; 0.5x coelenterazine
8; Detection; Luminescence; ViewLux imaging system

NOTES (numbers refer to sequence above)
1; SH-SY5Y human neuroblastoma cells stably expressing GLuc-SERCaMP (SH-SY5Y-GLuc-ASARTDL) cells were seeded in 1,536 well white tissue culture treated plates (Corning, Cat# 7464) in DMEM-high glucose-sodium pyruvate (ThermoFisher Scientific, Cat #10569) supplemented with 10% bovine growth serum (Hyclone), 10 U/ml penicillin (Gibco), 10 ug/ml streptomycin (Gibco), and 20 mM HEPES.
2; Assay plates were incubated for 5 hour at 37C in a humidified incubator containing 5% CO2.
3; qHTS libraries (23 nl, final concentrations of 1.53 uM, 7.67 uM, 38.3 uM) or controls (neutral control: DMSO, positive control: dantrolene) were added using a Kalypsis pin-tool Robotic System equipped with 1536 pinheads.
4; Cells were then incubated for 16 hours at 37C, 5% CO2.
5; Thapsigargin was added at 100 nM to deplete ER calcium stores.
6; Cells were incubated for 4 hour (37oC, 5% CO2)
7; Gaussia luciferase in the medium was measured by adding 1 ul of 0.5x coelenterazine (final concentration 0.07x) prepared in Gaussia Luciferase Glow Assay Buffer (Pierce), without addition of the Cell Lysis Buffer Reagent.
8; Luminescence was measured using a ViewLux high-432 throughput CCD imaging system (Perkin Elmer) equipped with clear filters. Compounds exhibiting inhibitory activity (defined as curve class -1.1, -1.2, -1.3, -1.4, -2.1, -2.2, -2.3, -2.4, -3) were identified by normalizing plate-wise to corresponding intra-plate controls (neutral control = Tg only; positive control (100% inhibition) = DMSO vehicle) with percent activity derived using in-house software (https://tripod.nih.gov/curvefit). The same controls were also used for the calculation of the Z' factor, a measure of assay quality control, as previously described (Zhang et al., 1999). For the initial validation of activity in the SERCaMP assays, hits from the primary screen were assayed again at 11-concentrations (1.3 nM - 76.6 uM). SH-SY5Y-GLuc-SERCaMP cells were assayed for ER Ca2+ depletion as outlined above.

Reference:
1. Zhang, J.H., Chung, T.D., and Oldenburg, K.R. (1999). A Simple Statistical Parameter for Use in Evaluation and Validation of High Throughput Screening Assays. J Biomol Screen 4, 67-73.

Comment: Disclaimer:
Although all reasonable efforts have been made to ensure the accuracy and reliability of the data, caution should be exercised when interpreting the results as artifacts are possible from nonspecific effects such as assay signal interference. The curve fitting and activity calls presented here are based on the NCATS analysis methods.

Compound Ranking:
1. Compounds are first classified as having full titration curves, partial modulation, partial curve (weaker actives), single point activity (at highest concentration only), or inactive. For this assay, apparent inhibitors are ranked higher than compounds that showed apparent activation.
2. For all inactive compounds, with a ratio activity curve class of 4, PUBCHEM_ACTIVITY_SCORE is 0. For all active compounds, a score range was given for each curve class type given above. Active compounds have PUBCHEM_ACTIVITY_SCORE between 40 and 100. For a ratio activity curve class = -1.1, score = 80+abs((log_ac50+4.5)*inf_activity/20). For ratio.curve_class == -1.2 && abs(ratio.max_response) > 6*10, score = 60+abs((log_ac50+4.5)*inf_activity/20). For ratio.curve_class == -2.1 || ( ratio.curve_class==-2.2 && abs(ratio.max_response) > 6*10), score = 40+abs((log_ac50+4.5)*inf_activity/20). For ratio.curve_class == -1.2 || ratio.curve_class == -2.2, score = 20+abs((log_ac50+4.5)*inf_activity/20). Inconclusive compounds, with a donor curve class other than 4, have PUBCHEM_ACTIVITY_SCORE of 10. Inconclusive compounds have PUBCHEM_ACTIVITY_SCORE between 1 and 39.

External ID: CHEMBL5062802

Protocol: N/A

Comment: Target ChEMBL ID: CHEMBL301
ChEMBL Target Name: Cyclin-dependent kinase 2
ChEMBL Target Type: SINGLE PROTEIN - Target is a single protein chain
Relationship Type: D - Direct protein target assigned
Confidence: Direct single protein target assigned

Data Source: EUbOPEN Chemogenomic Library

External ID: TDP1100

Protocol: DT40-hTDP1 cells without 20 nM Camptothecin (add 20 microL of DMSO in 1 L of cell culture medium) were dispensed at 400 cells/5microL/well in tissue culture treated 1536-well white wall/solid bottom assay plates (Greiner Bio-One North America, NC, U.S.A.) using a Multidrop Combi 8 channel dispenser (Thermo Fisher, Waltham, MA, USA). 23 nL compounds and controls were transferred using the pin tool (Kalypsys, San Diego, CA, USA) to the assay plates. The assay plates were then incubated at 37 masculineC for a minimum 48 hr. Three microL of Cell Titer Glo solution was added to the plates and incubated at RT in dark for 30 min. Luminescence was read using ViewLux (Perkin Elmer) with 1 sec exposure slow speed, high gain and 2x binning.

Comment: Compound Ranking:

1. Compounds are first classified as having full titration curves, partial modulation, partial curve (weaker actives), single point activity (at highest concentration only), or inactive. See data field "Curve Description". For this assay, apparent inhibitors are ranked higher than compounds that showed apparent activation.
2. For all inactive compounds, PUBCHEM_ACTIVITY_SCORE is 0. For all active compounds, a score range was given for each curve class type given above. Active compounds have PUBCHEM_ACTIVITY_SCORE between 40 and 100. Inconclusive compounds have PUBCHEM_ACTIVITY_SCORE between 1 and 39. Fit_LogAC50 was used for determining relative score and was scaled to each curve class' score range.

External ID: TDP1101

Protocol: DT40-hTDP1 cells with 20 nM Camptothecin (add 20 microL of 1 mM CPT stock in 1 L of cell culture medium) were dispensed at 400 cells/5microL/well in tissue culture treated 1536-well white wall/solid bottom assay plates (Greiner Bio-One North America, NC, U.S.A.) using a Multidrop Combi 8 channel dispenser (Thermo Fisher, Waltham, MA, USA). 23 nL compounds and controls were transferred using the pin tool (Kalypsys, San Diego, CA, USA) to the assay plates. The assay plates were then incubated at 37 masculineC for a minimum 48 hr. Three microL of Cell Titer Glo solution was added to the plates and incubated at RT in dark for 30 min. Luminescence was read using ViewLux (Perkin Elmer) with 1 sec exposure slow speed, high gain and 2x binning.

Comment: Compound Ranking:

1. Compounds are first classified as having full titration curves, partial modulation, partial curve (weaker actives), single point activity (at highest concentration only), or inactive. See data field "Curve Description". For this assay, apparent inhibitors are ranked higher than compounds that showed apparent activation.
2. For all inactive compounds, PUBCHEM_ACTIVITY_SCORE is 0. For all active compounds, a score range was given for each curve class type given above. Active compounds have PUBCHEM_ACTIVITY_SCORE between 40 and 100. Inconclusive compounds have PUBCHEM_ACTIVITY_SCORE between 1 and 39. Fit_LogAC50 was used for determining relative score and was scaled to each curve class' score range.

External ID: HMS1315

Protocol: Cybrid cells were washed with PBS, trypsinized, spun down at 300g for 5 minutes, and resuspended in 10 mLs of PBS. Cells were counted, and the appropriate amount of cells were added to a vial containing DMEM (No Glucose) + 2%FBS + 1% P/S + 10mM Galactose, DMEM (No Glucose) + 2%FBS + 1% P/S + 10mM Galactose + 0.3% DMSO, DMEM No Glucose + 2% FBS + 1% P/S + 10mM Galactose + 1uM I-BET GSK 525762A, or DMEM (No Glucose) + 2%FBS + 1% P/S + 10mM Galactose + 1.25mM Glucose. Cells were then seeded in a Corning 3570 384-well plate (40 ul/well,1500 cells/well). Two replicates were prepared as described at the same time per library plate.

100 nl of compound was added to each well via pin transfer immediately after seeding. After the addition of compound, cells were incubated for 72 hours at 37 degrees C with 5% CO2.

Following the 72 hour incubation period, the 384 well plates were centrifuged for 1 minute at 1000 rpm. The media was aspirated using an aspiration wand and fresh media DMEM only, was added to the cells (40uL/ well) using a well-mate. Fifteen-microliters of Cell Titer Glow substrate was then added to each well using the well-mate. The plates were gently vortexed for 10 seconds and then centrifuged for 1 minute at 1000 rpm. The plates were then immediately read on the Envision instrument and the luminescence was detected for each individual well.

Positive control (strong): Cells seeded in DMEM (No Glucose) + 2%FBS + 1% P/S + 10mM Galactose + 1.25mM Glucose
Positive control (weak): Cells seeded in DMEM No Glucose + 2% FBS + 1% P/S + 10mM Galactose + 1uM I-BET GSK 525762A
Negative control: Cells seeded in DMEM (No Glucose) + 2%FBS + 1% P/S + 10mM Galactose + 0.3% DMSO

Comment: Data analysis method and criteria for scoring active compounds:

Z-scores were calculated for both replicates separately using the plate average and standard deviation of experimental well luminescence (Z = (x - mu)/sigma). Compounds were considered active if both replicate Z-scores >= 1.8. Activity scores were determined by scaling replicate average Z-scores from 0 (activity score = 0) to 4 (activity score = 100), with activity score > 45 being considered active. Z-scores < 0 were set to activity score = 0; Z-scores > 4 were set to activity score = 100 (100% activity).

External ID: IucA Pilot Assay Tocris Library

Protocol: A solution containing 55.6 mM HEPES pH 7.5, 0.11% Tween 20, 16.7 mM MgCl2, 55.6 mM hydroxylamine, 55.6 microM ATP, 55.6 microM citrate, and 0.28 U/mL IPP was dispensed (45 microL) into clear polystyrene microplates (Corning, Inc.) using a BioTek MicroFlo dispenser.

Next, 40 nL of test compounds (10 mM in DMSO, 8 microM final concentration) were transferred from deep-well blocks to the reaction solution using a stainless-steel pin tool operated by a robotic workstation (JANUS, PerkinElmer, Waltham, MA). The IucA-catalyzed reaction was initiated by adding 5 microL of 3 microM IucA in 25 mM HEPES, 75 mM NaCl, and 0.1 mM TCEP at pH 7.5.

The reactions were allowed to proceed for 30 min at room temperature before being quenched by dispensing (microFill, BioTek) 13 microL of MG developing solution, containing 1.0 mg/mL MG oxalate, 1.5% (w/v) ammonium molybdate, 0.15% (v/v) Tween 20, and 4.7 N sulfuric acid. After allowing the assay color to develop/stabilize for 30 min, the absorbance at 620 nm was measured (EnVision 2103 Multilabel Microplate Reader, PerkinElmer).

Average positive controls from 24 wells with no test compound and average negative controls from 8 wells with no enzyme were calculated. Dynamic range was calculated by difference between Avg Pos Control and Avg Neg Control. Percent inhibition was calculated by the ratio of (Avg. Pos. Ctrl - Sample OD) to Dynamic Range.

Comment: Protein Target is
IucA

EMB09144
574 aa
G057_19877
Klebsiella pneumoniae hvKP1

Active compounds were defined by <80% activity at 8 microM screening concentration.

External ID: CHEMBL5066886

Protocol: N/A

Comment: Target ChEMBL ID: CHEMBL4040
ChEMBL Target Name: MAP kinase ERK2
ChEMBL Target Type: SINGLE PROTEIN - Target is a single protein chain
Relationship Type: H - Homologous protein target assigned
Confidence: Homologous single protein target assigned

External ID: CHEMBL5063170

Protocol: N/A

Comment: Target ChEMBL ID: CHEMBL301
ChEMBL Target Name: Cyclin-dependent kinase 2
ChEMBL Target Type: SINGLE PROTEIN - Target is a single protein chain
Relationship Type: H - Homologous protein target assigned
Confidence: Homologous single protein target assigned

External ID: 7124-01_Inhibitor_SinglePoint_HTS_Activity

Protocol:
Protocol:
1) Plate 10 uL BL2-NFkB-luc cells at 12.5K cells/well, using a Multidrop Combi reagent dispenser (1,250 cells/uL).
2) Add 25 nL compound or positive control, by pin transfer; IKK inhibitor VII will be used at 50 uM.
3) Incubate at 37 masculineC for 1 hour (allowing compounds to enter cells for action).
4) Add 5 uL 192 ng/mL tCD40L per well for a final concentration of 64 ng/ml using a Thermo Multidrop Combi.
5) Incubate at 37 masculineC for 4 hrs, then leave plate at RT for 30 minutes.
6) Add 15 uL SteadyGlo luciferase substrate (Promega) per well using a Thermo Multidrop Combi.
7) Incubate at RT for 5min, then read Luminescence using LJL Analyst HT plate reader.

Comment: PRESENCE OF CONTROLS: Neutral control wells (NC) and positive control wells (PC) were included on every plate.

EXPECTED OUTCOME: Active compounds result in decreasing readout signal.

NORMALIZATION:
The raw signals of the plate wells were normalized using the 'Neutral Controls Minus Inhibitors' method in Genedata Assay Analyzer (v10.0.2):
The median raw signal of the intraplate neutral control wells was set to a normalized activity value of 0.
The median raw signal of the intraplate positive control wells was set to a normalized activity value of -100.
Experimental wells values were scaled to this range.

PATTERN CORRECTION: No plate pattern correction algorithm from Genedata Condoseo (v.10.0.2) was applied.

PUBCHEM_ACTIVITY_SCORE:
This was set as equal to the mean of the normalized sample replicate activities, rounded to the nearest integer .
The minimum PUBCHEM_ACTIVITY_SCORE required for a compound to be called a hit (the activity threshold, or AT) was set at -50.

PERCENTAGE OF ACTIVE REPLICATES:
For each sample, the percentage of replicates (PCT_ACTIVE_REP) which had activity scores >= AT was determined.
The minimum percentage of replicates required for a compound to be called a hit (PAR_T) was set at 55.

PUBCHEM_ACTIVITY_OUTCOME:
Samples passing BOTH threshold criteria were assigned an outcome of 2 (active):
PUBCHEM_ACTIVITY_SCORE >= AT, and PCT_ACTIVE_REP >= PAR_T

Samples passing NEITHER threshold criteria were assigned an outcome of 1 (inactive):
PUBCHEM_ACTIVITY_SCORE < AT, and PCT_ACTIVE_REP < PAR_T

Samples passing AT only were assigned an outcome of 1 (inactive) :
PUBCHEM_ACTIVITY_SCORE >= AT, and PCT_ACTIVE_REP < PAR_T

Samples passing PAR_T only were assigned an outcome of 1 (inactive) :
PUBCHEM_ACTIVITY_SCORE < AT, and PCT_ACTIVE_REP >= PAR_T

External ID: CHEMBL5065589

Protocol: N/A

Comment: Target ChEMBL ID: CHEMBL262
ChEMBL Target Name: Glycogen synthase kinase-3 beta
ChEMBL Target Type: SINGLE PROTEIN - Target is a single protein chain
Relationship Type: D - Direct protein target assigned
Confidence: Direct single protein target assigned

Data Source: EUbOPEN Chemogenomic Library

External ID: VSVM-OFFLINE

Protocol: Two uL of HEK293 cell suspension are dispensed at 1000 cells/well into solid white 1536-well plates (Grenier) using a Multidrop Combi (Thermo Scientific). After addition of 23 nL compound by a pin tool (Kalypsys), the plate is incubated 1 h at 37 degrees C and then 3 uL of virus 1:100 dilution VSV-MARV is added. After 28 hr, 4 uL of assay reagent is added and the plates are read using a ViewLux (Perkin Elmer). Assays are performed in sub-saturating amounts of virus (MOI <0.5), therefore luciferase signals reflect the amount (titer) of virus able to infect the cells in presence of the compound.

Comment: Compound Ranking:

1. Compounds are first classified as having full titration curves, partial modulation, partial curve (weaker actives), single point activity (at highest concentration only), or inactive. See data field "Curve Description". For this assay, apparent inhibitors are ranked higher than compounds that showed apparent activation.
2. For all inactive compounds, PUBCHEM_ACTIVITY_SCORE is 0. For all active compounds, a score range was given for each curve class type given above. Active compounds have PUBCHEM_ACTIVITY_SCORE between 40 and 100. Inconclusive compounds have PUBCHEM_ACTIVITY_SCORE between 1 and 39. Fit_LogAC50 was used for determining relative score and was scaled to each curve class' score range.

External ID: VSVL-OFFLINE

Protocol: For screening, 1000 cells in 2 ul/well were dispensed into white solid 1536-well plates (Greiner) using a solenoid-based dispenser. Following transfer of 23nl compound or DMSO vehicle by a pin tool, 3 ul/well of VSV-LV was added. The plates were centrifuged 1 min at 1000 RPM and then incubated 16 hr at 37 C and 5% CO2. After addition of 4 ul/well SteadyLite (PerkinElmer) detection reagent, the plates were incubated 10 min at ambient temperature and luminescence was measured on a ViewLux (Perkin Elmer) plate reader.

Keywords: NIH Roadmap, MLPCN, MLI, MLSMR, qHTS, NCGC, Lassa virus, luciferase, cell assay, infection

Comment: Compound Ranking:

1. Compounds are first classified as having full titration curves, partial modulation, partial curve (weaker actives), single point activity (at highest concentration only), or inactive. See data field "Curve Description". For this assay, apparent inhibitors are ranked higher than compounds that showed apparent activation.
2. For all inactive compounds, PUBCHEM_ACTIVITY_SCORE is 0. For all active compounds, a score range was given for each curve class type given above. Active compounds have PUBCHEM_ACTIVITY_SCORE between 40 and 100. Inconclusive compounds have PUBCHEM_ACTIVITY_SCORE between 1 and 39. Fit_LogAC50 was used for determining relative score and was scaled to each curve class' score range.

External ID: CHEMBL5060015

Protocol: N/A

Comment: Target ChEMBL ID: CHEMBL1862
ChEMBL Target Name: Tyrosine-protein kinase ABL
ChEMBL Target Type: SINGLE PROTEIN - Target is a single protein chain
Relationship Type: D - Direct protein target assigned
Confidence: Direct single protein target assigned

Data Source: EUbOPEN Chemogenomic Library

External ID: CHEMBL5209826

Protocol: N/A

Comment: Target ChEMBL ID: CHEMBL4227
ChEMBL Target Name: Lipoxin A4 receptor
ChEMBL Target Type: SINGLE PROTEIN - Target is a single protein chain
Relationship Type: D - Direct protein target assigned
Confidence: Direct single protein target assigned

Data Source: EUbOPEN Chemogenomic Library

External ID: epac1-activator-v

Protocol: Briefly, three uL of reagents (100 nM EPAC1, 250 nM RAP1B-BODIPY-GDP, 50 uM GDP) were dispensed into a 1536-well Greiner black solid-bottom medium binding assay plate. Controls and test compounds (23 nL) were transferred to the plate via a Kalypsys pin tool equipped with a 1536-pin array. The plates were centrifuged at 1,000 rpm for 15 seconds followed by 5 minute incubation at room temperature. The assay plates were read at 5 minute intervals for 30 minutes in the ViewLux plate reader using 480nm excitation and 540nm emission filters. The results were normalized to the agonist positive control of 6.5 mM cAMP.

Comment: Disclaimer:
Although all reasonable efforts have been made to ensure the accuracy and reliability of the data, caution should be exercised when interpreting the results as artifacts are possible from nonspecific effects such as assay signal interference. The curve fitting and activity calls presented here are based on the NCATS analysis methods.

Compound Ranking:
1. Compounds are first classified as having full titration curves, partial modulation, partial curve (weaker actives), single point activity (at highest concentration only), or inactive. For this assay, apparent activators are ranked higher than compounds that showed apparent inhibition.
2. For all inactive compounds, with a ratio activity curve class of 4, PUBCHEM_ACTIVITY_SCORE is 0. For all active compounds, a score range was given for each curve class type given above. Active compounds have PUBCHEM_ACTIVITY_SCORE between 40 and 100. For a ratio activity curve class = 1.1, score = 80+abs((log_ac50+4.5)*inf_activity/20). For ratio.curve_class == 1.2 && abs(ratio.max_response) > 6*10, score = 60+abs((log_ac50+4.5)*inf_activity/20). For ratio.curve_class == 2.1 || ( ratio.curve_class==-2.2 && abs(ratio.max_response) > 6*10), score = 40+abs((log_ac50+4.5)*inf_activity/20). For ratio.curve_class == 1.2 || ratio.curve_class == 2.2, score = 20+abs((log_ac50+4.5)*inf_activity/20). Inconclusive compounds, with a donor curve class other than 4, have PUBCHEM_ACTIVITY_SCORE of 10. Inconclusive compounds also have PUBCHEM_ACTIVITY_SCORE between 1 and 39.

External ID: CHEMBL5209829

Protocol: N/A

Comment: Target ChEMBL ID: CHEMBL1784
ChEMBL Target Name: Glucagon-like peptide 1 receptor
ChEMBL Target Type: SINGLE PROTEIN - Target is a single protein chain
Relationship Type: D - Direct protein target assigned
Confidence: Direct single protein target assigned

Data Source: EUbOPEN Chemogenomic Library

External ID: epac1-inhibitor-v

Protocol: Briefly, three uL of reagents (100 nM EPAC1, 250 nM RAP1B-BODIPY-GDP, 50 uM GDP) were dispensed into a 1536-well Greiner black solid-bottom medium binding assay plate. Controls and test compounds (23 nL) were transferred to the plate via a Kalypsys pin tool equipped with a 1536-pin array. The plates were centrifuged at 1,000 rpm for 15 seconds followed by 5 minute incubation at room temperature. The assay plates were read at 5 minute intervals for 30 minutes in the ViewLux plate reader using 480nm excitation and 540nm emission filters. The results were normalized to the agonist positive control ATA and DMSO.

Comment: Disclaimer:
Although all reasonable efforts have been made to ensure the accuracy and reliability of the data, caution should be exercised when interpreting the results as artifacts are possible from nonspecific effects such as assay signal interference. The curve fitting and activity calls presented here are based on the NCATS analysis methods.

Compound Ranking:
1. Compounds are first classified as having full titration curves, partial modulation, partial curve (weaker actives), single point activity (at highest concentration only), or inactive. For this assay, apparent inhibitors are ranked higher than compounds that showed apparent activation.
2. For all inactive compounds, with a ratio activity curve class of 4, PUBCHEM_ACTIVITY_SCORE is 0. For all active compounds, a score range was given for each curve class type given above. Active compounds have PUBCHEM_ACTIVITY_SCORE between 40 and 100. For a ratio activity curve class = -1.1, score = 80+abs((log_ac50+4.5)*inf_activity/20). For ratio.curve_class == -1.2 && abs(ratio.max_response) > 6*10, score = 60+abs((log_ac50+4.5)*inf_activity/20). For ratio.curve_class == -2.1 || ( ratio.curve_class==-2.2 && abs(ratio.max_response) > 6*10), score = 40+abs((log_ac50+4.5)*inf_activity/20). For ratio.curve_class == -1.2 || ratio.curve_class == -2.2, score = 20+abs((log_ac50+4.5)*inf_activity/20). Inconclusive compounds, with a donor curve class other than 4, have PUBCHEM_ACTIVITY_SCORE of 10. Inconclusive compounds have PUBCHEM_ACTIVITY_SCORE between 1 and 39.

External ID: CHEMBL5209823

Protocol: N/A

Comment: Target ChEMBL ID: CHEMBL5339
ChEMBL Target Name: G-protein coupled receptor 120
ChEMBL Target Type: SINGLE PROTEIN - Target is a single protein chain
Relationship Type: D - Direct protein target assigned
Confidence: Direct single protein target assigned

Data Source: EUbOPEN Chemogenomic Library

External ID: epac2-activator-v2

Protocol: Briefly, three uL of reagents (100 nM EPAC2, 250 nM RAP1B-BODIPY-GDP, 50 uM GDP) were dispensed into a 1536-well Greiner black solid-bottom medium binding assay plate. Controls and test compounds (23 nL) were transferred to the plate via a Kalypsys pin tool equipped with a 1536-pin array. The plates were centrifuged at 1,000 rpm for 15 seconds followed by 5 minute incubation at room temperature. The assay plates were read at 5 minute intervals for 30 minutes in the ViewLux plate reader using 480nm excitation and 540nm emission filters. The results were normalized to the agonist positive control of 6.5 mM cAMP.

Comment: Disclaimer:
Although all reasonable efforts have been made to ensure the accuracy and reliability of the data, caution should be exercised when interpreting the results as artifacts are possible from nonspecific effects such as assay signal interference. The curve fitting and activity calls presented here are based on the NCATS analysis methods.

Compound Ranking:
1. Compounds are first classified as having full titration curves, partial modulation, partial curve (weaker actives), single point activity (at highest concentration only), or inactive. For this assay, apparent activators are ranked higher than compounds that showed apparent inhibition.
2. For all inactive compounds, with a ratio activity curve class of 4, PUBCHEM_ACTIVITY_SCORE is 0. For all active compounds, a score range was given for each curve class type given above. Active compounds have PUBCHEM_ACTIVITY_SCORE between 40 and 100. For a ratio activity curve class = 1.1, score = 80+abs((log_ac50+4.5)*inf_activity/20). For ratio.curve_class == 1.2 && abs(ratio.max_response) > 6*10, score = 60+abs((log_ac50+4.5)*inf_activity/20). For ratio.curve_class == 2.1 || ( ratio.curve_class==-2.2 && abs(ratio.max_response) > 6*10), score = 40+abs((log_ac50+4.5)*inf_activity/20). For ratio.curve_class == 1.2 || ratio.curve_class == 2.2, score = 20+abs((log_ac50+4.5)*inf_activity/20). Inconclusive compounds, with a donor curve class other than 4, have PUBCHEM_ACTIVITY_SCORE of 10. Inconclusive compounds also have PUBCHEM_ACTIVITY_SCORE between 1 and 39.