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Andrew Hitchcock

Dr at School of Biosciences

University of Sheffield
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Positions (1)

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Andrew Hitchcock

University Name
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University of Sheffield

This fully funded PhD position is part of the BBSRC Yorkshire Bioscience Doctoral Training Partnership (YBDTP), a collaboration among leading universities in the Yorkshire and Teesside region, including the University of Sheffield. The project focuses on developing cyanobacteria for enhanced light-driven biotechnology, aiming to engineer these photosynthetic microorganisms as 'green cell factories' for the sustainable production of high-value commercial chemicals. Despite their potential, cyanobacteria have not yet achieved the industrial impact of conventional microbes like E. coli or yeast. This research will address this gap by creating new cyanobacterial strains and co-cultures, optimizing metabolite production, and integrating these with established industrial microorganisms. The student will work within an interdisciplinary supervisory team at the University of Sheffield and collaborate with the industry partner Deep Blue Biotech. Training will cover molecular biology, microbial physiology, synthetic biology, and advanced analytical methods such as mass spectrometry and metabolomics. The project includes hands-on experience with laboratory-scale photobioreactors, opportunities to study scale-up processes, and exposure to industrial biotechnology environments. The student will be embedded in two academic research groups and a dynamic biotech start-up, gaining both technical expertise and insight into commercialization pathways. The research contributes to renewable chemicals, carbon capture, and sustainable manufacturing, making it ideal for candidates interested in microbiology, biotechnology, and synthetic biology. The YBDTP is committed to diversity and encourages applications from all backgrounds. Applicants must have or expect to obtain at least an upper second-class honours degree in a relevant scientific discipline. The studentship covers a tax-free stipend at the UKRI rate (£20,780 for 2025/26), tuition fees at the UK rate, and research costs. A limited number of full studentships are available for exceptional international applicants. The application deadline is 7 January 2026, and shortlisted candidates will be invited for interview in February 2025. For more information, visit the YBDTP website or contact the supervisors.

9 months ago

Articles (11)

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2023

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2023

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2023

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2023

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2023

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2023

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2023

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2022

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2022

In oxygenic photosynthesis, the cytochrome b6f (cytb6f) complex links the linear electron transfer (LET) reactions occurring at photosystems I and II and generates a transmembrane proton gradient via the Q-cycle. In addition to this central role in LET, cytb6f also participates in a range of processes including cyclic electron transfer (CET), state transitions and photosynthetic control. Many of the regulatory roles of cytb6f are facilitated by auxiliary proteins that differ depending upon the species, yet because of their weak and transient nature the structural details of these interactions remain unknown. An apparent key player in the regulatory balance between LET and CET in cyanobacteria is PetP, a ∼10 kDa protein that is also found in red algae but not in green algae and plants. Here, we used cryogenic electron microscopy to determine the structure of the Synechocystis sp. PCC 6803 cytb6f complex in the presence and absence of PetP. Our structures show that PetP interacts with the cytoplasmic side of cytb6f, displacing the C-terminus of the PetG subunit and shielding the C-terminus of cytochrome b6, which binds the heme cn cofactor that is suggested to mediate CET. The structures also highlight key differences in the mode of plastoquinone binding between cyanobacterial and plant cytb6f complexes, which we suggest may reflect the unique combination of photosynthetic and respiratory electron transfer in cyanobacterial thylakoid membranes. The structure of cytb6f from a model cyanobacterial species amenable to genetic engineering will enhance future site-directed mutagenesis studies of structure-function relationships in this crucial ET complex.

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2022

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2022

Collaborators (8)

Jenny Clark

Prof

University of Sheffield

UNITED KINGDOM
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Mark Dickman

Professor at School of Chemical, Materials and Biological Engineering

University of Sheffield

UNITED KINGDOM
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Susannah E. Walsh

-

UNITED KINGDOM
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Aidan Taylor

Lecturer in Microbiology

University of Reading School of Biological Sciences

UNITED KINGDOM
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Daniel P. Canniffe

University of Liverpool

UNITED KINGDOM
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Gregory S. Engel

University of Chicago

UNITED STATES
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Matthew P Johnson

University of Sheffield

UNITED KINGDOM
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David Swainsbury

Lecturer in Biochemistry

University of East Anglia

UNITED KINGDOM
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