The University of Southampton
Centre for Biological Sciences
Phone:
(023) 8059 4415
Email:
Ivo.Tews@soton.ac.uk

Dr Ivo Tews PhD

Lecturer in Structural Biology, Admissions Tutor - Natural Sciences, Principal Investigator (Protein interactions & cell membranes)

Dr Ivo Tews's photo
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Dr Ivo Tews is Lecturer in Structural Biology within the Centre for Biological Sciences at the University of Southampton.

Career history

2010-2014: Lecturer in Structural Biology. University of Southampton, UK.
Postdoctural Research Fellow. Heidelberg University, Germany.
Postdoctural Research Fellow. NIMR Mill Hill, London, UK.

Academic qualifications

PhD in crystallography. The EMBL outstation, Hamburg, Germany.
Diploma in Biological Sciences. Heidelberg University, Germany.

Research

Publications

Teaching

Contact

Research interests

Vitamin B6 Biosynthesis

Vitamins are low molecular weight compounds which have to be taken up into our cells in trace amounts, and vitamin deprivation leads to disease. In the body, vitamins often serve as enzymatic cofactors. Studies of their biosynthesis by human pathogens are of particular interest in order to develop specific drugs.
The main pathway for de novo vitamin B6 biosynthesis is a recent discovery. We address the architecture of key enzyme complex, PLP synthase and study protein-protein interaction, complex formation, activation of the enzymes and the biosynthesis of the vitamin by the enzyme complex.

Protein transport across cell membranes

Cell survival critically depends on transport. Metabolic products have to be transferred into and out of the cell, and proteins are secreted. Inside the cell there is transport as well, for example into and out of organelles. These transport phenomena involve transfer across membranes. We study plant chloroplast protein import as one example. Proteins required for photosynthesis are mainly synthesized in the cytosol of plant cells, and thus need to be transported into the organelle. Protein transport is mediated by the Toc-Translocon in the outer chloroplast membrane. The GTPases investigated by us are receptors of protein import.

Mycobacterial Adenylyl Cyclases

The Mycobacterium tuberculosis genome has 15 open reading frames for class III adenylyl cyclases (ACs). We investigate ACs that respond to environmental pH and lipid composition. The proteins contain a regulatory domain at the N-terminus and a class III cyclase homology domain (CHD) at the C-terminus. Depending on regulatory stimuli, the CHDs dimerise to form the active enzyme. The activated enzymes produce the universal second messenger cAMP from ATP. Reorientation of the catalytic domains on pH change leads to inactivation, while a dimeric structure is retained through interaction of the regulatory domains.

Research group(s)

Molecular and Cellular Biosciences

Affiliate research group(s)

Research Facilities

Article(s)

Lecturer

BIOL2012 Exploring Proteins: Structure and Function
BIOL3012 Cell Membranes
BIOL3013 Molecular Recognition
BIOL3017 The Molecular and Structural Basis for Disease

Dr Ivo Tews
Centre for Biological Sciences Faculty of Natural & Environmental Sciences Life Sciences Building 85 University of Southampton Highfield Campus Southampton SO17 1BJ

Room Number: 85/4041

Telephone: (023) 8059 4415
Email: Ivo.Tews@soton.ac.uk

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