6. class single molecule fluor part 2 Flashcards
Single molecule enzymatics
Single molecule enzymatics dynamics
Time dependent kcat
The lipase B from the yeast candida antarctica
Non fluorescent substrate conversion
Long observation time possible
Several conformations are involved
How many conformations are involved?
The ‘lazy’ enzyme
Size of the fluorogenic substrate
Size of the substrate
Single molecule enzymatics
Single molecule enzymatics
Phospholipases
Phospholipase A1 studied
Single molecule enzymatics
Single molecule enzymatics
first step
Single molecule enzymatics?
Water soluble perylenediimide dye (PDI)
Dual color excitation
Active PLA1 – High concentration
Active PLA1 – Low concentration
Active PLA1 vs inactive
Single enzyme trajectories
Image analysis
hetero vs Homogeneous track
Cummulative distribution functions
Enzyme mobility
Model of mode of operation
Getting closer to cell membranes….
Getting closer to nature….
Hydrolysis of giant unilamellar vesicles (GUV’s)
cytoplasma & er
YFP-PLCβ1 – Ca2+ response
eGFP-PLCβ1 – Ca2+ response + SPT
DNA sequencing & the human genome project
DNA sequencing
DNA-sequencing history
1 st gen: Sanger
1 st gen: Sanger method
1 st gen: Automated Sanger Method
1 st gen: Automated Sanger Method
1 st gen: Automated Sanger Method
2 nd gen: 454 sequencing
2 nd gen: 454 sequencing (Roche®)
2 nd gen: 454 sequencing (Roche®)
2 nd gen: 454 sequencing (Roche®)
2 nd gen: Illumina® (Solexa) sequencing
2 nd gen: Illumina® (Solexa) sequencing
reversible terminators
comparison of next generation sequencing platforms
Single molecule DNA Sequencing
Microcapillary-based SM DNA sequencing (M.Sauer et al. Heidelberg)
Microcapillary-based SM DNA sequencing
Microcapillary-based SM DNA sequencing
Flow-cytometry based DNA sequencing
cleavage vs control
DNA-sequencing: the Helicos-approach
step 1
DNA-sequencing: the Helicos-approach
step 2
DNA-sequencing: the Helicos-approach
step 3
DNA-sequencing: the Helicos-approach
step 4
DNA-sequencing: the Helicos-approach
step 5
DNA-sequencing: the Helicos-approach
step 6
DNA-sequencing: the Helicos-approach
step 7
DNA-sequencing: the Helicos-approach
step 8
DNA-sequencing: the Helicos-approach
step 9
helicos tool
correlogram
DNA target template
HELICOS & FRET
Pacific biosciences approach:
metal film
Pore-based sequencing