Structural Biology and Bioinformatics
Research Groupings: Structural and molecular cell biology | Developmental and regenerative biology and medicine
Tom Blundell completed his terms of thirteen years as Sir William Dunn Professor of Biochemistry and Head of Department and six years as Head of the School of biological Sciences on 30th September 2009. He was appointed Director of Research and Professor Emeritus. He continues to teach and conduct research in structural and computational biology and in drug discovery. In July 2009 he took up the post of Chair of the Biotechnology and Biological Sciences Research Council, a non-executive part-time appointment. He is also President of The Biochemical Society.
Research
Tom Blundell’s research is focused on structural biology and bioinformatics and their applications to drug discovery and medicine
Most of his work has been on multi-component protein assemblies – cell surface receptors and intracellular signal systems - that mediate cell regulation. In the 1960s and 1970s he became interested in the molecular structure and function of the hormones insulin, glucagon and oxytocin, but more recently has focused on growth factors including nerve growth factor (NGF), fibroblast growth factor (FGF) and hepatocyte growth factor/ scatter factor (HGF/SF) and their receptors. He has been particularly interested in the ways that multiprotein assemblies can achieve high signal to noise in Nature through cooperative interactions leading to specific but often transient assemblies.
Over the past decade he has extended his work on multiprotein systems to understanding DNA damage repair signaling, focusing on initially on homologous recombination (HR) in the study of Rad51 interactions with BRCA2, and more recently on Non-Homologous End Joining (NHEJ), both of which play major roles in double-strand break DNA repair. In NHEJ a ring-shaped Ku70/Ku80 heterodimer forms first at broken DNA ends, and DNA-dependent protein kinase catalytic subunit (DNA-PKcs) binds to mediate synapsis. His group has recently reported a 3D structure of DNA-PKcs in complex with a fragment of Ku. DNA ligase IV (LigIV) is recruited as a complex with XRCC4 for ligation, with XLF/Cernunnos, playing a role in enhancing activity of LigIV. They have used X-ray crystallography to determine structures of both XRCC4 and XLF. They are now using a combination of methods - X-ray crystallography, electron microscopy, small angle X-ray scattering, nanospray mass spectrometry, ITC and SPR - to gain insights the organisation of higher order complexes.
The group has developed widely used software in structural bioinformatics, including databases of three-dimensional structures of proteins (CREDO, PICCOLO, BIPA), software for sequence-structure (fold) recognition (FUGUE) and software for comparative modeling (COMPOSER, MODELLER, ORCHESTRAR, RAPPER). The current focus is on the identification and analysis of drug targets, especially those in Mycobacterium tuberculosis and Man, and on the analysis of the roles of nsSNPs and somatic mutations in human disease.
These interests have led to extensive work on structure-guided drug discovery. In the 1970s and 80s Tom Blundell focused on approaches to lead optimization, particularly antihypertensives targeted to renin, and AIDS antivirals, against HIV proteinase. In the past two decades he has become interested in fragment-based approaches to lead discovery, co-founding Astex Therapeutics and establishing academic groups in the University funded by the Bill and Melinda Gates Foundation, by the Wellcome Trust and by European Union, against both difficult targets (multiprotein systems) and neglected diseases (tuberculosis).
Lab members
Noha Abdel-Rahman, Michal Blaszczyk, Victor Bolanos-Garcia, Dimitri Chirgadze, Marcio Dias, Sungsam Gong, Alicia Higueruelo, Anjum Karmali, Semin Lee, Ann Ling, Bernado Ochoa Montano, Takashi Ochi, Will Pitt, Adrian Schreyer, Lynn Sibanda, Anna Sigurdardottir, Leonardo Silvestre, Jawon Song, Sachin Surade, Qian Wu.