arttechnow

MOLECULAR BIOLOGY SKILLS

FROM PROTEIN ENGINEERING TO PURIFICATION

  • Computational biology, molecular modeling, molecular dynamics, bioengineering

  • DNA sequencing by Sanger method using radioactive labels and modern automated methods 

  • Protein engineering using bacterial DNA (gene knock-outs, single point mutations, etc)

  • Protein cloning (PCR, Gibson protocol, etc)

  • Plasmid vector transformation (electro- and chemical)

  • Bacterial cell culture growth in various media

  • Protein expression and co-expression

  • Protein purification using chromatography (size exclusion, ion exchange, affinity, etc.)

  • Protein and protein complexes validation (SDS gels, mass-spectrometry, circular dichroism)

  • Protein complex assembly, proteins renaturation (using buffers and fixatives)

  • Stoichiometry determination in protein complexes

  • Immunoblotting

PROTEIN CRYSTALLOGRAPHY

  • Protein crystallization – manually and using mosquito robot

  • Crystals visualisation using light microscope and RockImager 

  • Small angle scattering and crystallographic data collection using home rotating anode X-ray source (Rigaku) and at the synchrotrons in France (Soleil, ESRF), Switzerland (SLS) and Germany (DESY)

  • Data acquisition and processing using HKL 2000, XDS, Mosflm crystallographic software

  • Structure determination using CCP4, Phenix, Shelx C/D/E, Phaser, ARP/wARP, AutoSharp software

NUCLEAR MAGNETIC RESONANCE

  • Cloning, expression and purification of C13, N15 isotope labeled proteins

  • NMR spectroscopy data collection using 600 and 800 MHz Bruker systems

  •  Data acquisition, processing and manual analysis using NMRPipe and Sparky software

  • Structure determination using NMR software (e.g., AutoProc, AutoAssign) and online servers (DisMeta, Pine)

SINGLE PARTICLE CRYO-ELECTRONE MICROSCOPY

  • Negative stain EM

  • Protein complex labelling with golden particles

  • Continuous thin carbon grids preparation

  • Sample cryo-vitrification using Vitrobot Mark IV (FEI)

  • Cryo-EM data collection at Titan Krios (Diamond facility, UK) and Tecnai F20 (Imperial College, UK) microscopes

  • Software usage:

    • EPU for data collection

    • MotionCor2 for image frames alignment

    • GCTF for contrast transfer function dtermination

    • Relion and IMagic for protein structure reconstruction

    • LocScale for sharpening of the electron map

    • I-Tasser, Chimera, Coot, Phenix, Swissmodel for model building and refinement

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