University of Edinburgh EASTBIO PhD: Polyester Depolymerisation with Artificial Metalloenzymes

University of Edinburgh EASTBIO PhD: Polyester Depolymerisation with Artificial Metalloenzymes

This is a defined chemistry–biology project with an explicit four-year competitive funding route covering international tuition through Edinburgh’s fee-gap arrangement. Its appeal is the combination of polymer catalysis and protein-based catalyst environments. The main scientific uncertainty is whether that combination offers a measurable advantage for PLA and PEF, rather than simply transferring promising results from other catalysts or substrates.

Research Problem and Doctoral Work

The project investigates poly(lactic acid), PLA, and poly(ethylene furanoate), PEF. PET illustrates the background challenge: polymer accessibility and crystallinity can strongly affect enzymatic recycling, while metal catalysts face different stability and operating constraints. These distinctions matter because activity demonstrated on PET cannot establish activity on the proposed PLA or PEF substrates.

The doctoral work connects three questions:

• Can an artificial metalloenzyme environment improve metal–salen catalyst stability and polymer access?
• How does the catalyst structure relate to depolymerisation of PLA and PEF?
• How does catalyst chirality relate to PLA of different tacticities?

These are research hypotheses. The proposal does not establish complete depolymerisation, stereochemical control or a scalable recycling process.

A useful thesis would distinguish polymer disappearance, formation of smaller fragments and recovery of identified monomers. Comparisons should account for polymer morphology, starting material and the contribution of each catalytic component. Evidence of catalyst persistence, selectivity and usable product recovery would be more informative than an isolated conversion figure. These questions help establish what the thesis would need to demonstrate.

Garden’s 2025 polyester study supplies relevant catalytic evidence, but it uses a different catalyst architecture. Jarvis’s recent biohybrid studies support scaffold and metal-binding expertise in other reactions. Together they make the research combination credible without demonstrating the proposed combination already works. Similarly, the advertised description of PLA and PEF as greener materials is not an independently verified life-cycle assessment: feedstock, separation, energy, catalyst recovery and product quality remain material questions. Garden’s polyester study, Jarvis’s scaffold study

School, Programme and Field Context

The host is the University of Edinburgh’s School of Chemistry, within the College of Science and Engineering at King’s Buildings. The current degree catalogue identifies Chemistry PhD for 2027 entry, normally three years full-time. The advertised award is 48 months. Confirm the precise registration and training arrangement for this funded project instead of shortening its award to match the generic course duration. EaStCHEM is the Edinburgh–St Andrews joint research school; its existence does not establish a jointly awarded doctorate. Chemistry PhD 2027

The institutional and subject signals are substantial but have different scopes. QS lists Edinburgh 35th overall for 2027. The Chemistry catalogue reports EaStCHEM’s REF 2021 research environment as entirely world-leading and more than 99% of assessed outputs as world-leading or internationally excellent. Those are historical unit-level assessments, not an evaluation of this individual supervisory partnership. QS institutional ranking

Training is a practical attraction here. The School expects supervisors to provide appropriate technical access and training, and offers chemistry seminars, student presentations, safety and transferable-skills development. EASTBIO’s current framework puts core training mainly in years one and two, with greater research focus in years three and four. The published 2026/27 calendar serves existing students and does not fix the new cohort’s timetable. Confirm how cross-group training and the professional placement fit the thesis, including the duration and host of any placement. General access to university facilities does not reserve equipment time or technical support for a particular student. School training, EASTBIO training

Supervisor and Lab Assessment

Jennifer A. Garden’s official profile identifies her as Dr Garden and a UKRI Future Leaders Fellow, working on catalysis, sustainable polymers and functional materials. Amanda Jarvis is a Senior Lecturer in Chemistry and UKRI Future Leaders Fellow, with research in artificial metalloenzymes and biological architectures for catalysis. Their interests support a sensible division between polymer/metal catalysis and biohybrid catalyst environments. The actual day-to-day division, meeting frequency and technical mentoring remain to be agreed. Garden’s official profile, Jarvis’s official profile

Three genuine recent supervisor-coauthored originals provide different kinds of evidence:

Polyester catalysis: Reis and colleagues, JACS 2025

With Garden and Dove as corresponding authors, this study examines robust heterometallic catalysts for polyester depolymerisation and polymerisation. The study compares catalyst combinations and polymer contexts, reporting stability and repeated-use evidence alongside activity/control trade-offs. The available evidence comprises the original abstract and selected published-paper results, discussion and conclusion. Polymer form influences interpretation; the work does not validate protein-enclosed catalysts, PEF recycling or a complete environmental assessment. JACS study

Scaffold-dependent catalysis: MacAulay and colleagues, Chemical Communications 2024

With Jarvis and Campopiano as corresponding authors, this study demonstrates an artificial Stetterase using an organocatalyst and a protein scaffold. Scaffold-dependent activity and stereoselectivity are relevant to the proposed environment–performance question. The available evidence comprises the complete publisher abstract and substantive indexed design/conclusion passages; it does not cover the complete methods or supplementary information. This is a different reaction and an organocatalyst, so it is not evidence of metal–salen polyester depolymerisation. Stetterase original

Protein-based functionality: Day and colleagues, Angewandte Chemie 2024

This study, coauthored by Jarvis, combines metal-binding functionality and an orthogonally reactive handle in a protein context. The institutional original abstract supports this contribution, but does not establish the paper’s full experimental results. It establishes relevant molecular-tool expertise, rather than PLA/PEF performance. Dual-purpose functionality original

One advertised reference needs particular care: PNAS e2308286120 is Liu and colleagues’ copper histidine-brace model for polysaccharide degradation. Garden and Jarvis are not authors. It is adjacent artificial-enzyme evidence, not independent verification of this team’s metal–salen polyester claim. PNAS reference identity and abstract

Funding, Application, and Living Cost

The individual announcement specifies 48 months, a stipend and UK-level fees, with Edinburgh paying the international fee difference. The current EASTBIO FAQ independently confirms a top-up waiver for successful international candidates. Its 30% limit concerns annual international intake across the programme; it does not allocate this project 30% of a place or exclude Chinese applicants. This is a positive complete international competitive pathway, not a personal award already secured. EASTBIO funding and eligibility FAQ

For this project, send the completed EASTBIO application form and PDF academic transcripts to J.Garden@ed.ac.uk by 16 November 2026, 23:59 GMT. Ask both referees to use the EASTBIO reference template and send their references to the same supervisor before the deadline. Referees can be academic or professional but cannot be members of the proposed supervisory team. Complete the anonymous EDI survey and copy its response ID into the application. Only one EASTBIO project may be selected across institutions. Additional documents such as a CV are disregarded under the network FAQ; follow the prescribed form rather than replacing it with a general application package. No two-week reference grace is stated for this chemistry route. Current application requirements

The 2027 personal stipend and payment schedule are not published in the project. UKRI’s current £21,805 minimum is a 2026/27 reference, not a confirmed 2027 award rate; its £5,238 fee contribution is paid towards Home fees, not an annual living stipend. Edinburgh’s 2026/27 single-person living estimate is £18,504 a year, including average accommodation and utilities of £978 a month. The £3,301 difference between those dated annual references is not a predicted disposable surplus. Housing choice, inflation, deposits and moving costs matter. UKRI support, Edinburgh living-cost estimate

EASTBIO excludes visa and immigration health surcharge costs. Current government references are £558 for a Student visa application and £776 per visa year for the student surcharge; actual chargeable permission length and future rates determine the bill. Self-funded bench fees listed by the Chemistry course should not be automatically imposed on this funded award: request its written research-cost coverage. Student visa, Health surcharge

Applicant Fit and Preparation

The 2027 Chemistry programme normally requires a UK 2:1 in chemistry or a related subject; applicants from other backgrounds should consult the supervisor. EASTBIO does not require a master’s degree. Its FAQ allows assessment of applicants below the undergraduate threshold who have a master’s or significant relevant professional experience, which is a case-by-case route rather than automatic eligibility.

For Chinese applicants, Edinburgh explicitly recognises degrees from recognised Chinese universities or its Priority List. The displayed 80–85% equivalence table is expressly for taught postgraduate programmes and two named research master’s programmes; it cannot establish a Chemistry PhD percentage cut-off. Ask the School to assess the actual institution, degree and transcript. Chinese qualification guidance

The 2027 Chemistry English requirements are IELTS Academic 6.5 overall, each component 6.0, without One Skill Retake. TOEFL iBT requires 92 overall and 23 each before 21 January 2026, or 4.5 overall and each from that date; Home Edition is accepted, MyBest is not. Other published routes are CAE/CPE 176 with 169 each, Oxford ELLT 7 with 6 each (without Skill Retake), and Oxford Advanced 145 with 135 each. IELTS/TOEFL/ELLT/Oxford Advanced results must normally be no more than two years old at the first day of the starting month; the other listed tests have a 3.5-year limit. EASTBIO allows application before obtaining an English certificate, although a formal offer may require it.

An English-taught Chinese degree does not automatically provide an exemption. Approved-university and qualifying UK–China 2+2/3+1 routes have specific evidence rules; 4+0 degrees are generally restricted, with defined exceptions. Non-majority-English-speaking nationals normally face a five-year degree-age limit for the degree-based route. Chemistry may also require ATAS according to the offer’s subject classification. Chinese nationality is not an ATAS exemption, and screening is neither an automatic rejection nor guaranteed clearance. English evidence rules, ATAS subject and nationality rules

Useful preparation would demonstrate critical reasoning about catalyst characterisation, polymer analysis and comparisons across disciplinary boundaries. The project offers molecular biology, synthesis and analytical training; these are not all advertised as pre-entry hard requirements.

Career and Transferable Skills

These skills can support chemical materials, analytical and research careers. The combination of polymer chemistry and biohybrid catalysis offers experience in interpreting evidence across disciplines; available sources do not establish employment rates or salary outcomes.

Next Actions and Questions to Verify

Contact Garden early with the project title and a concise description of relevant research. Ask which PLA/PEF question is likely to lead the first year, what would count as convincing catalyst benefit, and who supervises the biological and chemical components. Clarify equipment access, technical assistance, research-consumable coverage and the balance between training and thesis work.

Confirm acceptance into the current cycle, the exact Chemistry registration and its relationship to the 48-month award, the personal start date, and any English/ATAS conditions. The network describes an October start, but the individual announcement supplies no exact day. Obtain the personal fee waiver, stipend schedule and continuation terms in writing before accepting an offer. EASTBIO selection framework

Evidence and Sources

The dated current-cycle announcement is the basis for this project’s deadline. Garden’s group website links an older recruitment round, and the School’s current funded-project directory does not independently list this topic. Neither establishes that the new round is closed. They make direct confirmation useful without negating the explicit international funding route. Garden group, School studentship directory

Project, supervisors and original research

• Garden: official role and research
• Jarvis: official role and research
• Garden group: research and historical recruitment
• Garden coauthored JACS 2025 polyester original
• Jarvis coauthored ChemComm 2024 scaffold original
• Jarvis coauthored Angew 2024 functionality original
• External PNAS 2023 reference: authors and actual substrate
• School: current studentship directory

Degree, training and application

• Chemistry PhD: 2027 entry
• Chinese qualification guidance
• English qualification and exemption rules
• EASTBIO: required forms and submission
• EASTBIO: eligibility and funding FAQ
• EASTBIO: cohort training
• EASTBIO: selection and start framework
• School: technical training and careers
• QS: institutional ranking by year

Funding, living costs and immigration

• Edinburgh: dated living-cost budget
• UKRI: stipend and fee contributions
• UK government: Student visa
• UK government: student health surcharge
• UK government: ATAS rules